Is there any turbo out there that could put down 400whp and around 200lbs.tq @3,000-3,200RPM on 91 octane?

I know someone is going to say something about going to a Florida dyno and so on hahahah. So for a reference I am looking for 400whp on a dyno that reads around 230whp on a stock Evo X.

We do have 94 octane around here (only a handful of stations in the city) but it is with a 10% Ethanol blend which makes it more along the lines of a true 92 octane. I have also found I get worse gas milage out of the 94 than I do when I use 91 with no Ethanol and I use the Evo a fair bit on the highway. Some local tuners I have talked with have found they can make almost the same power with Shell 91 as our Husky 94.

Either way I will end up getting a tune with the 94 as well but I would like to try and make 400whp with 91 and just be done with trying to time my fill ups when I am close to a station with 94 and get away from switching my maps just for the highway portion where all I can get is 91 than switching back to the 94/92 maps when I get to the next city that I will be in for the next week or so.

Modifications right now making 337hp with 92 octane on COBBs dyno are
- ATP Turbo inlet pipe
- Password JDM intake box
- UICP
- AGP Intercooler
- Synapse DV
- Grimspeed 3 port boost solenoid
- Perrin Catback with test pipe

Modifications for 400whp (injectors/pump are a given)
- Turbo
- AMS downpipe
- Cams/Springs (Only if I absolutely have to)

 

I hit 400whp at Cobb on Shell 93-octane with the MAP EF2 turbo with stock cams and a ported exhaust manifold. The EF2 + cams or a tubular exhaust manifold would easily hit 400+ on 91-octane.

Instant spool and response too, it's a great street turbo.

https://www.evolutionm.net/forums/ev...-pump-gas.html

 

Yea when I saw your dyno I thought I had the exact turbo I would need but I saw you ran a true 93 octane where as I mentioned I only have access to a true 92 at best and its only at a handful of stations at best.

So you think if I just went to a set of cams OR tubular manifold I could make 400whp on 91? If I could get away without opening up the engine at all and just do the manifold I would go for that. I don't want to open up the engine at all if I could get away with it (ahaha unless the turbo does it for me). With this car I have told my self 1000 times that I would only go to what the stock internals can handle and call it a day as I have had the headaches of going past that point with a bunch of my other cars even when professionally done.

 

Basically any bolt-on turbo will do it as long as you have proper supporting mods.

 

There's no doubt in my mind you'd hit 400+ on 91 octane with a tubular exhaust manifold. I'm exactly with you too, I have zero plans for a big build or built engine.

 

I've seen a Garrett GT3076 do it on the crap Cali 91 octane (which has 10% ethanol). It should do it easily on the better fuel that you have. I imagine the GTX3071 version will do it easily too.

 

Surprised you are not considering HKS 7460 Evo X kit.
It may come a hair short of 400whp on 91 w stock cams but can we even tell 10-20 whp at that level?
We surely can appreciate immediate spool, virtually no lag compared to stock.
CBRD BBK X will give you about exactly 400whp on 91 octane, or really close with stock cams, but with lag unlike stock or HKS.

Cams are very expensive to install on X, I would not spend money on them if you are competing with the car.

 

Have they fixed the issues with the Garrett turbos? I have read a number of people having issues with them kind of coming apart and causing all kinds of issues.

Another member on the other forum had major issues with the HKS turbos. He might be on here as well but he had 2 or 3 I believe fail on him. As for not being able to tell the 10-20hp I am sure I wouldn't, but I would rather be in the 425whp range (when I decide to run 92 octane) with 400whp being the kind of lowest on the 91 octane. So that 10-20hp would put me even further from where I really would like to be.

 

This Turbo.
https://www.evolutionm.net/forums/sa...ml#post9719631

 

I would but to many issues with them. I do realize it is the Kai edition but its just a bit to much of a risk for what I am willing to do.

 

i would take in consideration what spdracerut is suggesting, on a gt3071r i made 425hp and 395lbs at 21pounds of boost with 93octane on mustang dyno at about 4000rpms . calculatin on dyno jet would be around 520hp making it a difference of about 18%. i say 400hp would be no problem.

 

Yes, over a year ago as far as I can tell. And the failure mode was the wastegate flapper valve breaking off which just meant there was no boost.