Best bolt-on turbo for 400 street whp ?
03-03-2012, 06:45 PM
#1
Instructor
Thread Starter
Best bolt-on turbo for 400 street whp ?
Anybody know the fastest spooling bolt on turbo capable of up to... 400whp? Super series dbb?, or? I want something that can support decent hp but with street manners..... I prefer oil cooled, but I know that is not an option for BB turbos...
03-03-2012, 09:10 PM
#2
Rennlist Member
Apparently the best bolt on for 400whp is a V8. 
03-03-2012, 09:37 PM
#3
Addict
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Street 160hp/liter 944 engine will probably require a bit more than just a new turbo.
03-03-2012, 10:01 PM
#4
Instructor
Thread Starter
Never stated that "just a turbo" would do it! It will be going on my '89 with Forged pistons, 4"LR EX, P&P head, solid lifters, DP wastegate, etc, and either a Rogue M-tune, or Vitesse maf.
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Razzo951 (12-11-2021)
03-03-2012, 10:03 PM
#5
Instructor
Thread Starter
03-03-2012, 10:10 PM
#6
Three Wheelin'
Any other head work done? Might want a turbo that will fit a 3" downpipe. If you're in the States, E85 should make it pretty easy to achieve 400hp, with reasonable costs too. Make sure if you go with a bigger turbo, you already have bigger injectors. Getting a MAF kit should take care of that.
I would PM the guys on here like blown944, for example, to see how to achieve your goals.
I would PM the guys on here like blown944, for example, to see how to achieve your goals.
03-03-2012, 11:50 PM
#7
Instructor
Thread Starter
Any other head work done? Might want a turbo that will fit a 3" downpipe. If you're in the States, E85 should make it pretty easy to achieve 400hp, with reasonable costs too. Make sure if you go with a bigger turbo, you already have bigger injectors. Getting a MAF kit should take care of that.
I would PM the guys on here like blown944, for example, to see how to achieve your goals.
I would PM the guys on here like blown944, for example, to see how to achieve your goals.
Last edited by brandon19761; 03-04-2012 at 12:44 AM.
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03-04-2012, 12:47 AM
#8
Instructor
Thread Starter
Any other head work done? Might want a turbo that will fit a 3" downpipe. If you're in the States, E85 should make it pretty easy to achieve 400hp, with reasonable costs too. Make sure if you go with a bigger turbo, you already have bigger injectors. Getting a MAF kit should take care of that.
I would PM the guys on here like blown944, for example, to see how to achieve your goals.
I would PM the guys on here like blown944, for example, to see how to achieve your goals.
03-04-2012, 01:08 AM
#9
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Wheres Reno...
This question has been asked that many times. i've been thinking about making a "What modifications should i do: answers here" thread.
Any gt30 series turbo will get you there.
any turbo that will push more then 450 lb/min will get you there.
This question has been asked that many times. i've been thinking about making a "What modifications should i do: answers here" thread.
Any gt30 series turbo will get you there.
any turbo that will push more then 450 lb/min will get you there.
03-04-2012, 01:21 AM
#10
Instructor
Thread Starter
yeah.Know that. Just wanna make sure there aren't any new hybrids that I haven't come across... I'd like to go GT30 but I don't want the headache of modding exhaust/oil lines etc.... I wanna stick with "bolt-on" for now, untill I learn how to do my own welding.
03-04-2012, 01:32 AM
#11
Race Car
Best bolt on is a 50 or 57 trim with a stg 3 turbine wheel IMO.
Getting 400 true whp is another matter on pump gas IMO. You'll need a few more things like headwork, cam, tb, possibly ic, and most likely a custom dyno tune. I'm not talking about these claimed 400 hp dynos either, I mean real rwhp like 115+ trap speeds at full weight.
Personally I'd go with meth injection or e85 and crank up the boost to 24psi which comes with its own issues. 400 "true rwhp" is quite a bit and most likely unnecessary. I have found that over 350 just creates a ton of tire spin and wasted effort. Unless you have high aspirations I'd set a lower goal to start.
Getting 400 true whp is another matter on pump gas IMO. You'll need a few more things like headwork, cam, tb, possibly ic, and most likely a custom dyno tune. I'm not talking about these claimed 400 hp dynos either, I mean real rwhp like 115+ trap speeds at full weight.
Personally I'd go with meth injection or e85 and crank up the boost to 24psi which comes with its own issues. 400 "true rwhp" is quite a bit and most likely unnecessary. I have found that over 350 just creates a ton of tire spin and wasted effort. Unless you have high aspirations I'd set a lower goal to start.
03-04-2012, 01:56 AM
#12
Instructor
Thread Starter
Best bolt on is a 50 or 57 trim with a stg 3 turbine wheel IMO.
Getting 400 true whp is another matter on pump gas IMO. You'll need a few more things like headwork, cam, tb, possibly ic, and most likely a custom dyno tune. I'm not talking about these claimed 400 hp dynos either, I mean real rwhp like 115+ trap speeds at full weight.
Personally I'd go with meth injection or e85 and crank up the boost to 24psi which comes with its own issues. 400 "true rwhp" is quite a bit and most likely unnecessary. I have found that over 350 just creates a ton of tire spin and wasted effort. Unless you have high aspirations I'd set a lower goal to start.
Getting 400 true whp is another matter on pump gas IMO. You'll need a few more things like headwork, cam, tb, possibly ic, and most likely a custom dyno tune. I'm not talking about these claimed 400 hp dynos either, I mean real rwhp like 115+ trap speeds at full weight.
Personally I'd go with meth injection or e85 and crank up the boost to 24psi which comes with its own issues. 400 "true rwhp" is quite a bit and most likely unnecessary. I have found that over 350 just creates a ton of tire spin and wasted effort. Unless you have high aspirations I'd set a lower goal to start.
03-04-2012, 02:12 AM
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the quicker the spool the more boost you'll have to run to achieve top end power (HP) and the less safe it'll be because of the higher boost you'll need to run and the back pressure.
the more laggy the turbo is the less boost you'll need to run to achieve the same amount of power since it'll have less back pressure and able to breath at higher RPM
With the simple bolt ons using the KKK rear housing, the spool vs top end is smaller then a GT series rear housing.
the more laggy the turbo is the less boost you'll need to run to achieve the same amount of power since it'll have less back pressure and able to breath at higher RPM
With the simple bolt ons using the KKK rear housing, the spool vs top end is smaller then a GT series rear housing.
03-04-2012, 02:14 AM
#14
Drifting
The fastest 2.5 951 I ever built had 330whp and 345wt at 18psi on pump fuel. This car had a K27/6, and when you hit the gas, there was no lag. Immediate power. Fun car. I had another 2.5 951 that hit 425whp and similar tq, but the spool up time (lag) wasn't worth the extra power. Hit the gas...spool...now going...hated the setup, and it sucked at the track.
You can build a 2.5 motor that will hit consistent 400whp numbers, but it's not worth the laggy nature of having such a big turbo. I've seen 2.5 400whp dyno charts with good tq prior to 4K, but this was NOT with pump gas and the boost was 22 to 25 psi.
A well sorted 330whp 951 with full TQ prior to 4K is a really fun/fast car to drive.
I've had many sports cars over the years. The 951 is best suited when you have full boost by 3500 - 3800 rpm and max hp by 6300 to 6500 RPM.
You can build a 2.5 motor that will hit consistent 400whp numbers, but it's not worth the laggy nature of having such a big turbo. I've seen 2.5 400whp dyno charts with good tq prior to 4K, but this was NOT with pump gas and the boost was 22 to 25 psi.
A well sorted 330whp 951 with full TQ prior to 4K is a really fun/fast car to drive.
I've had many sports cars over the years. The 951 is best suited when you have full boost by 3500 - 3800 rpm and max hp by 6300 to 6500 RPM.
03-04-2012, 02:39 AM
#15
Rennlist Member
Why did you opt for the solid lifters? Not necessary for anything but high end track car.