| From | Message |
xplikt
Dodge Dakota
JOIN HERE
2/02/2002
13:03:22
|
 Subject: Why not Twin Turbo Kit for 4.7L, Bernd?
IP: Logged
Message:
Hey Bernd, why isn't there a twin turbo kit for the 4.7L, just the 5.2 and 5.9?
Thanks,
Mike
|
Tom Slick
Dodge Dakota
JOIN HERE
2/02/2002
13:41:15
| RE: Why not Twin Turbo Kit for 4.7L, Bernd?
IP: Logged
Message:
Space constraints and cost are two of the major factors. There would be no real difference in performance with the 4.7L going with two turbos instead of one. We are going with a twin turbo system on the 5.9L(360) do to the fact that once you get over 350c.i. twin turbos are a virtual necessity. The 5.2L is also getting the twin turbo treatment becasue it is externally identical to the 5.9L, the turbos are matched to each engine.
I'd be glad to answer any other questions that you may have!
Tom North
turbokits@speedtweaks.net
|
CW
GenIII
2/02/2002
18:19:59
|  RE: Why not Twin Turbo Kit for 4.7L, Bernd?
IP: Logged
Message:
Have you bolted the turbo on the 4.7 yet? I want to know the hp and torque you are pulling.
2001 RC 4.7 5sp 9.25" 3.92 LSD
Ported 68mm throttle body, IAT adjuster, 3" flowmaster cat back, TPS @ .76V, 4" cold air, Roadmaster active suspention, Removed Third cat. Electric fan Convertion, Awaiting HO cams.
Working on adjustable fuel pressure with return.
|
Rob W
Dodge Dakota
JOIN HERE
2/02/2002
22:32:19
| RE: Why not Twin Turbo Kit for 4.7L, Bernd?
IP: Logged
Message:
Tom, what's the latest as far as R & D, ETA, pricing, etc... for the 5.9 kit? I can email turbokits@speedtweaks.net if needed. Thanks!
-Rob W
01 CC RT
|
Tom Slick
Dodge Dakota
JOIN HERE
2/02/2002
23:16:47
| RE: Why not Twin Turbo Kit for 4.7L, Bernd?
IP: Logged
Message:
The preliminary design is already done, but we are trying to get the 3.9L and 4.7L kits done first. We are moving into our new facility during the next couple of weeks, and once we are settled the prototyping begins. We plan to have the 5.9L twin turbo kit available by mid year, but hopefully sooner than that. We are estimating that the 5.2L/5.9L kits will cost between $4000-4500 (but that may be subject to change). The kit is designed to be a complete system, including an intercooler(most likely air/liquid type).
I'd be glad to answer any other questions that you may have!
Thanks!
|
Rob W
Dodge Dakota
JOIN HERE
2/03/2002
09:39:42
| RE: Why not Twin Turbo Kit for 4.7L, Bernd?
IP: Logged
Message:
Ah, so you are going to have the 3.9s and 4.7s make the R/Ts look bad first, huh? :)
Seriously, thanks for the info and I'll check with you/speedtweaks every so often.
-Rob W
01 CC RT
|
Duner
Dodge Dakota
JOIN HERE
2/03/2002
11:21:39
| Tom Slick
IP: Logged
Message:
I understand that a larger engine requires more airflow, but rpm range also plays into the discussion somewhere. That rule about needing twin turbos for engines over 350 cubes is kind of general isn't it? It might be entirely true for engines that are turning 7000-8000 rpms, but the 5.9s don't wind that tight. How many rpms do people expect to make with them. Most everyone I've heard from generally stay below 6000 rpms (and that's heavily modded). Don't most 5.9s run to about 5200? I still believe that a single turbo - while it doesn't look nearly as impressive - will produce more boost/airflow than the 5.9 can use. I'm also having trouble with the concept of a single turbo not spooling up quickly enough. With the additional 20% of cubes of the 5.9 vs the 4.7 - I would expect the turbo to spool up even faster. I still don't think that an extra 20% displacement requires 200% complexity. When you factor in the rpm ranges of these engines, the airflow requirement difference is more like 10%.
OK, that's my argument from the numbers standpoint.
Twin Turbos sure will look cool under the hood!
Good luck you guys - I can't wait to see how it all turns out!
Believe it or not - I actually look forward to getting smoked by a twin-turbo R/T!
(ya gotta catch me first!) hehehe
|
xplikt
Dodge Dakota
JOIN HERE
2/03/2002
12:42:46
| RE: Why not Twin Turbo Kit for 4.7L, Bernd?
IP: Logged
Message:
So there wouldn't be any perfromance improvements with two then..? Not at all, I always was told that you would get more low end torque with two, so that's not true? I try to not to believe everything I see, but I've seen that multiple places.
Two turbos are pretty damn cool, which also means two blow off valves! Yey!
|
Hersbird
Dodge Dakota
JOIN HERE
2/03/2002
13:20:42
| RE: Why not Twin Turbo Kit for 4.7L, Bernd?
IP: Logged
Message:
After seening how well Duner's setup works I too would vote for the single turbo setup. It has to save costs and crap he's well into the 12's without an intercooler. Make that 5.9 kit a single turbo with intercooler and charge $3500 and count me in.
PS- make an adapter so it will work with a shaker hood, cause thats the only exterior mod I have ever wanted.
|
xplikt
Dodge Dakota
JOIN HERE
2/03/2002
14:14:57
| RE: Why not Twin Turbo Kit for 4.7L, Bernd?
IP: Logged
Message:
What's the difference in getting a turbo opposed to a nice KB SC? Lets assume they cost the same...
|
Jacob
Dodge Dakota
JOIN HERE
2/03/2002
14:17:52
| RE: Why not Twin Turbo Kit for 4.7L, Bernd?
IP: Logged
Message:
My very limited knowledge is that you can use two smaller turbos to produce the same amount that one larger one can produce...smaller turbo means quicker spool up..two 6lbs turbos is quicker than one huge 12lbs turbo...
With that said, with the advancement in technology in ball bearing turbos and such this is not really a factor anymore...but I am trusting speedtweaks on this one...plus i mean a twin turbo dak..come on its worth it..:)
|
xplikt
Dodge Dakota
JOIN HERE
2/03/2002
14:29:39
| RE: Why not Twin Turbo Kit for 4.7L, Bernd?
IP: Logged
Message:
Hrm, I don't really have the room to have two turbos, lots of things would have to be moved around. What would happen if someone were to have a turbocharger AND supercharger??
|
Todd W
Dodge Dakota
JOIN HERE
2/03/2002
15:22:20
| RE: Why not Twin Turbo Kit for 4.7L, Bernd?
IP: Logged
Message:
Well, you'd likely blow the heads right off the engine... :0)
|
Tom Slick
Dodge Dakota
JOIN HERE
2/03/2002
15:44:37
| RE: Why not Twin Turbo Kit for 4.7L, Bernd?
IP: Logged
Message:
We are going with a twin turbo design on the 5,2/5.9L engines due to a few reasons:
-Less overall piping would be required
-The exact same kit would work on the 5.9L's with pre-cats
-the larger dispacement engine would slightly benefit from a two turbo setup(ie. less backpressure and better flow on the exhaust side, better boost stability at high flow rates, better turbo life expectancy).
-5.2/5.9L engines have a lot more performance parts available and a twin setup would compliment them better. This kit will also work for the 408's(we just include the properly sized turbos)
Matching the turbos to the engine makes the difference...
Remember, Duner cranks up the boost for drag racing, but doesn't run that much boost on the street...plus, I do believe he has (or had) a water/alcohol injection system on it, too, for running higher boost levels.
I'd be glad to answer any other questions that you may have!
Thanks!
Tom North
turbokits@speedtweaks.net
|
Mike
Dodge Dakota
JOIN HERE
2/03/2002
15:48:58
| RE: Why not Twin Turbo Kit for 4.7L, Bernd?
IP: Logged
Message:
Two smaller turbos would spool up faster, improving throttle response. With one huge turbo you'd get that "turbo lag" until it got spooled up.
|
Duner
Dodge Dakota
JOIN HERE
2/03/2002
18:07:55
| We don't have no steenking lagg!
IP: Logged
Message:
Yes, that's very true that I don't run that high of boost all the time. I keep the boost between 5 and 7 lbs because that's all the higher I dare go with just premium unleaded. (just a little paranoid) I am running the Spearco water/alcohol injection system as a stop-gap until I get the intercooler system finished. I buy higher octane race gas for trips to the track - or just feel like having some extra power. I run with the boost set higher on the street until my supply of race gas is exhausted and I have to switch back to normal premium. That last bit of good gas is usually lots more fun that actually going to the track. You never know who you'll run across out on the hiway;>)
I guess I haven't had the opportunity to ride in many turbocharged vehicles. This is the first one I have owned. I guess I must not have a large enough turbo on it..... because it has virtually zero turbo lag. I just wish I had an opportunity to take everyone for a ride that's ever talked about a single turbo having turbo lag or spooling slowly. You hit the gas and your head snaps back!
I'm just guessing that the single turbo lag story got started because people usually don't put turbos on V8s? Maybe it works that way with a 2 liter engine. Remember, this is a truck engine that makes torque down low anyway. That torque production is because it's efficient at moving air even at the lower rpms. That air also spins the turbo.... right off the bottom. Maybe the addition of an intercooler might produce some lag, and maybe that's what everybody keeps talking about? Maybe I'll understand the concept some day.
|
CW
GenIII
2/03/2002
18:19:36
| RE: Why not Twin Turbo Kit for 4.7L, Bernd?
IP: Logged
Message:
Just take a diesel for a ride you will understand lag. They don't have much off the line but at about 1600 1700 rpm they really start to take off. As good as a stock diesel takes off anyways. The manuals are worse than the autos.
2001 RC 4.7 5sp 9.25" 3.92 LSD
Ported 68mm throttle body, IAT adjuster, 3" flowmaster cat back, TPS @ .76V, 4" cold air, Roadmaster active suspention, Removed Third cat. Electric fan Convertion, Awaiting HO cams.
Working on adjustable fuel pressure with return.
|
Tom Slick
Dodge Dakota
JOIN HERE
2/04/2002
00:19:39
| RE: Why not Twin Turbo Kit for 4.7L, Bernd?
IP: Logged
Message:
Actually, Lag is not really a bad thing...
It has nothing to do with throttle response...Lag is the time it takes for the turbo boost to be felt after you hit the gas... you are right about big V8's having slightly less lag than a 2 liter engine, Duner... the little engine has less bottom-end torque to begin with and must work a little harder to get the turbo spooled up... Your particular turbo is matched to your engine to produce low RPM max. efficiency. That is why you're truck is a little tricky to drive in low traction situations(rain, slick roads, etc.)
Here is one misconception, the major factor concerning Lag is not whether you run one of two turbos, but matching the turbo(s) to the engine for where you want the largest increase in power...you can match the turbo for low, mid, or high RPM efficiency (or a combination of two of them)... The higher RPM effiecency that you go with, the more Lag you have...
Here is a challenge for anyone in a turbocharged vehicle: Try to push the gas to the floor as quickly as possible and let off just as quick... there is no way that you can do this without producing max. boost pressure...
The most amount of Lag time would be right at 1 second, but that is using a very large turbo for the application, set up for high RPM efficiency...
As Corky Bell says, "If you have no lag, you have no turbo. You also have no huge torque increase to look forward to."
Duner, the intercooler should not cause any more lag, but should drop the boost about and up to 1 psi, but you can up the boost to compensate... There are a lot of factors to look at... matching the intercooler is important to...
Automatics have one advantage with turbos, inthe fact that you don't have to let off the gas to shift, keeping the turbo spooled, but you also lose a little torque to the autmatica transmission, too... the key there is in the boost bypass valve... in racing, they use a more restrictive boost bypass valve, so it just bleeds of some, not all of the boost like bypass valves for street cars do, so they can keep the boost up a little more... I do not recommend Racing bypass valves on the street, they shorten the life of the turbo(heat and backpressure), cause driveability problems, and put extra stress on the throttle body.
I'd be glad to answer any other questions that you may have!
Thanks!
Tom North
turbokits@speedtweaks.net
|
xplikt
Dodge Dakota
JOIN HERE
2/04/2002
00:44:07
| RE: Why not Twin Turbo Kit for 4.7L, Bernd?
IP: Logged
Message:
Tom North --> one sharp tool in the shed..
Ok, I got some..
What is the life expectancy of these turbos? I thought most turbos only worked for about 7-8 years. On that same subject, how long do superchargers last? This meaning I change my oil to Mobil 1 synth EVERY 3000 miles and not a mile over, I let it cool down for 30 seconds+ when I am ready to shut it off.
How will these perform in the cold? What special things will I need to do? Cold starting, a different weight in oil, etc? ANything about any particular weather conditions that I need to know about for a turbo?
How DO, you match turbos to an engine? What is being matched for the 4.7L? ..Or do we decide that?
Intercoolers sound like they are the greatest things in the world? Can I have too much of this great thing?
|
Tom Slick
Dodge Dakota
JOIN HERE
2/04/2002
03:12:55
| RE: Why not Twin Turbo Kit for 4.7L, Bernd?
IP: Logged
Message:
There are many factors that affect turbo life...
Such as:
-The oil that is used and how often it is changed
-How hard the engine is being run
-whether or not the user lets the turbo idle down for 30 seconds before shutting the engine off.
Proper vehicle maintenance is very important.
Both turbos and superchargers could easily last 100,000+ miles if properly maintained and not abused.
I also use Mobil 1, which I recommend to use with turbos... and I recommend changing the oil between 2000 and 3000 miles on a turbocharged vehicle when using synthetic oil(depending on the condition of the oil)
If you were to use dyno oil, definitely change the oil every 2000 miles...
Synthetic oils are less likely to coke, as compared to mineral-based oils...
Oil viscosity is also a consideration... It is best to avoid wide-range multi-viscosity oils, because the additives that make it that way actually help turbo "coking"... Example: 20W-50 would be better than 10W-50, but straight weight oil is best, with a ten-point increase in the summer...pick an oil appropriate for your weather climate... In Texas, I'd recommend Mobil 1 30 weight, and Mobil 1 40 weight during the summer...
There are also some oils out there that are recommended for use with turbos, which would be adequate, too.
An oil cooler might also be a consideration, too...especially if your oil needs to be changed more often(dirty oil, smells, breakdown)...
Turbos are matched by several factors like:
- engine displacement
- desired boost level
- desired max. efficiency RPM desired (low, mid, high)
- maximum RPM of the engine
- volumetric efficiency of the engine
- whether your running an intercooler (and what type of intercooler - air/air or air/water)
- Engine's compression ratio
- single or twin turbo setup
It is very possible to go with too large of an intercooler, not just too small of one... you want the intercooler to be able to handle slightly more than the CFM that the turbo puts out at max. rpm of the engine. I personally like the air/liquid intercoolers... they are more compact, and can be more efficient than air/air intercoolers... plus you can also run a "cool" can inline and chill the liquid even more (it's possible to get 100% efficiency out of the intercooler when done right).
I'd be glad to answer any other questions that you may have!
Thanks!
Tom North
turbokits@speedtweaks.net
|
xplikt
Dodge Dakota
JOIN HERE
2/04/2002
10:20:40
| RE: Why not Twin Turbo Kit for 4.7L, Bernd?
IP: Logged
Message:
What RPM are the 4.7L turbos going to boost around?
Is doing mods like porting my turbo, weling "big-necks" on the intercooler, and mods like that a good idea, even if you "think" you know what you are doing.
Also, do fuel pumps, filters, and higher # injectors come with the kits? What other things am I going to need to buy/make, IE downpipes.
|
Tom Slick
Dodge Dakota
JOIN HERE
2/04/2002
10:31:41
| RE: Why not Twin Turbo Kit for 4.7L, Bernd?
IP: Logged
Message:
The 4.7L kit should start producing boost just off idle...
There would really be not need to do any additional mods to the turbo system... Our kit is a full system, and is going to be an almost complete bolt-on... it will include a matched intercooler (air/liquid most likely)
It will come with everything necessary, so that you install it, then drive it...
I'd be glad to answer any other questions that you may have!
Thanks!
Tom North
turbokits@speedtweaks.net
|
xplikt
Dodge Dakota
JOIN HERE
2/04/2002
10:41:57
| RE: Why not Twin Turbo Kit for 4.7L, Bernd?
IP: Logged
Message:
Awesome! I'm lookin' forward to it!
When's it come out again??
|
Xphile1999
Dodge Dakota
JOIN HERE
2/04/2002
12:48:32
| RE: Why not Twin Turbo Kit for 4.7L, Bernd?
IP: Logged
Message:
I have a question, since the turbo is not linked to the pully system, how do you adjust the boost? If i plan on putting the turbo on my truck in the near future (ie when its released) should i buy headers? Does the turbo hook right into the block (3.9L)?
|
ALEX
Dodge Dakota
JOIN HERE
2/04/2002
14:07:53
| RE: Why not Twin Turbo Kit for 4.7L, Bernd?
IP: Logged
Message:
Everyone who's got questions like "Can I port my turbo? What size pully will I need?" needs to go directly to Amazon.com, order the book "Maximum Boost" by a guy named Corky Bell and then read it three times. It's an easy to read book that will tell you more than Tom North or Duner can ever type on this website. If you still have questions, then you can post them here.
Sorry to be an a$$hole.
|
xplikt
Dodge Dakota
JOIN HERE
2/04/2002
14:27:25
| RE: Why not Twin Turbo Kit for 4.7L, Bernd?
IP: Logged
Message:
ACTUALLY Alex, I looked at that and another book not but, just a couple days ago. I am seriously considering it to worth my while. I've been told Corky Bell is a guru on the subject. Before I spend 40 dollars in books, I want to know just some of hte basics and if it will really interest me, which I found does. For now, I will stick to the free imformation on the web, I still have a bunch of other things I wish to do before getting a turbo.
|
Anthony G
Dodge Dakota
JOIN HERE
2/04/2002
14:30:35
| RE: Why not Twin Turbo Kit for 4.7L, Bernd?
IP: Logged
Message:
You could of just said, Wastegate, Blow of valve, boost controller. It bleeds the extra pressure in the line called boost. When it hits a pre-set amount it opens or closes the wastegate causing the turbine not to spin thus stopping it from forcing air into the intake.
|
Anthony G
Dodge Dakota
JOIN HERE
2/04/2002
14:45:54
| RE: Why not Twin Turbo Kit for 4.7L, Bernd?
IP: Logged
Message:
I'm sure this Twin Turbo setup will be awesome. But for $4,500 dollars I would have to pass. That's too rich for my taste. How about making a cut down version. Single Turbo Garrett T04, Custon pipes exhaust feed off both sides or from the collector, turbo hoses and pluming, Boost Gauge, 6-10psi adjustible wastegate, and some type of replacement hat, something borrowed from a supercharger. It's not like the 3.9/5.2/5.9L engines can handle much boost anyways. Anything more than 10psi would blow head gaskets or put to much pressure of internal parts like the crank or cylinder walls. Of course a intercooler could help increasing boost, but any small Turbo can run up to 14.7psi. But with a bigger Turbo only running 9psi would run cool as is. I rather not spend the money on an extra Turbo and intercooler. Let alone trying to find space and installing them.
|
alex
Dodge Dakota
JOIN HERE
2/04/2002
14:49:23
| RE: Why not Twin Turbo Kit for 4.7L, Bernd?
IP: Logged
Message:
Did you want me to explain that the turbo does NOT "just hook into the block(3.9L)" as XPhile1999 asked or should I have just kept my mouth shut and let him think whatever?
I am just giving everyone a reference source so that they can get more thoroughly informed on the subject matter before making a $4000 mistake (or investment- however you view it). If everyone read that book, we'd all be on a level playing field here.
Aren't you the least bit annoyed everytime someone posts the exact same question (like "Which Flowmaster shoud I get?") that was answered yesterday? I'm not saying that asking questions is dumb, but doing a little bit research and THEN asking questions works pretty well, too.
Sorry to be an a$$hole again.
|
Anthony G
Dodge Dakota
JOIN HERE
2/04/2002
15:49:17
| RE: Why not Twin Turbo Kit for 4.7L, Bernd?
IP: Logged
Message:
Naw, it's OK Alex post whatever you want. For you that was your best answer to his question. I can understand the nature of the reply. Hell, from my reply I said wastegate. He might not even know what that is. So you reply would be more logical.
|
Jacob
Dodge Dakota
JOIN HERE
2/04/2002
16:20:58
| RE: Why not Twin Turbo Kit for 4.7L, Bernd?
IP: Logged
Message:
OK....for us who are planning on getting the turbo kit, and all.
What will it take to run more than 10lbs of boost? As far as I know Nick Kramer was running 18lbs at the track?
And, what kind of controls are going to be to control and program the wastegate...ie computer, and what type...Apexi or something similar?
|
alex
Dodge Dakota
JOIN HERE
2/04/2002
16:26:58
| RE: Why not Twin Turbo Kit for 4.7L, Bernd?
IP: Logged
Message:
Okay, I'll admit it, I bought the book, but then in my impatience, I began to e-mail Duner directly to find things out that (of course) were in the book. But I would go and read the book that night and then e-mail him again the next day with 25 more questions. So I guess I should be more patient.
Talking to him (and reading the book) I have just now come to understand the basics of turbo's, and so I am now interested in the next steps like fuel systems, intercoolers, different blow-off valves, electronically vs mechanically adjusted wastegates, alcohol injection, etc.
I've never considered turbo's til a friend of mine bought an Audi S-4, and now I'm all about them. In the words of that guy on that plane.....
"Let's Roll."
|
Anthony G
Dodge Dakota
JOIN HERE
2/04/2002
16:52:38
| RE: Why not Twin Turbo Kit for 4.7L, Bernd?
IP: Logged
Message:
I'm no Turbo expert. But to run good boost requires these items.
Low Compression ratio:
8.0CR is the Normal for a iron head.
8.5CR is with an Aluminum head.
A Forged Crank!
Thick Cylinder Walls!
If you can't bore .40 or more than the wall are too thin to start with.
Good head gaskets
The more head bolts the better! I think the Buick GN, Turbo T/A both run 14 bolts per head for only three cylinders.
Some short of Knock sensor, good fuel delivery, boost controller.
Efficient Turbo and Intercooler.
Use this to calculate the proper Turbo for your setup.
http://www.turbofast.com.au/TFmatch.html
|
Anthony G
Dodge Dakota
JOIN HERE
2/04/2002
17:09:49
| RE: Why not Twin Turbo Kit for 4.7L, Bernd?
IP: Logged
Message:
I've always notice that each psi adds around 10HP
So you could almost say, that 10psi will give you 100hp at the crank. I'm not saying 20psi will give you 200hp, because that setup might not be as efficient running at 20psi.
I had a turbo car that ran 8.7psi stock, I increased the boost to 14.7, it only had a KK03 Turbo w/intercooler. So that added boost gave me around 35hp to 40hp more. Since the engine was small it took 3k RPM before it was spooled even with the twin scroll technology and died around 5300rpms. At that point the Turbo was overtaxed, it needed a KK04 Turbo, because the engine spun up to 6500rpms before it redlined. A turbo wine is almost as priceless as the sweet tunes a Dodge V8 can make. But the turbo rush is nothing but awesome.
|
Tom Slick
Dodge Dakota
JOIN HERE
2/04/2002
17:49:40
| RE: Why not Twin Turbo Kit for 4.7L, Bernd?
IP: Logged
Message:
Corky Bell's shop is not too far from us... and I also recommend his book "Maximum Boost"... I've read it cover to cover more than a couple of times.
Anthony -
Low compression is not a requirement to run a good amount of boost... stock engines can actually handle around 7-12 psi boost.
We've seen Honda Civics running 20+psi boost (completely stock engine)...
This program: http://www.turbofast.com.au/TFmatch.html
is not only very generalized, but is also setup to match for low-RPM efficiency...
Remember, we are desinging this kit just like a supercharger kit, you just install it, and go... all the problems of placement, flow, fuel, boost control, etc. will be done already.
I'd be glad to answer any other questions that you may have!
Thanks!
Tom North
turbokits@speedtweaks.net
|
xplikt
Dodge Dakota
JOIN HERE
2/04/2002
18:48:24
| RE: Why not Twin Turbo Kit for 4.7L, Bernd?
IP: Logged
Message:
A knock sensor just seems like it's almost a must have from what I know about them, wonder if they have a sownside.
If I ran a turbo more than 7-8 pounds, I would for sure upgrade all my engine parts, mostly to forged. Most of the things right now would have to be custom. It doesn't seem like many aftermarket internal engine parts are out for the 4.7L...yet?? What's the point in having a turbo and not having a nice high available boost! (a safe one)
|
Tom Slick
Dodge Dakota
JOIN HERE
2/04/2002
19:07:47
| RE: Why not Twin Turbo Kit for 4.7L, Bernd?
IP: Logged
Message:
xplikt-
a 4.7L(287c.i.) engine @ 8psi boost would produce between 338 to 501hp with the midpoint being 420hp
@6psi boost: 308-457hp - midpoint 383hp
That is figured using the following calculations:
Lower value= .052 bhp/cid psi x engine cid x (boost + 14.7)
Higher value= .077 bhp/cid psi x engine cid x (boost + 14.7)
8psi with an intercooler would be safe for the 4.7L...
I'd be glad to answer any other questions that you may have!
Thanks!
Tom North
turbokits@speedtweaks.net
|
| | P 1 Next Page>> |
