I have searched high and low for days, and have found nothing but conflicting information. I'm going for 400whp and need to know exactly what I need to do so.

First and foremost, my fuel system. At the current time I have 440's, a Walbro 255, and the stock rail/lines/regulator. I need to know if I can realistically obtain 400whp without meth, a return system, or an aftermarket regulator. The idea is I'd get rid of my 440's and get ahold of some RC 750's or larger. If, and only if, I absolutely HAVE to run a return line, the fuel equation then gets a little more complicated. I would use the same principal that Ptuning does, run an -8 an braided line from the tank and use it as the feed line to the rail, utilizing the stock line as the return and probably get a golden eagle rail and a regulator. I believe I put the regulator on the return side to limit the amount of fuel being returned, but I'm not sure. Where do I put the regulator, and is there an application specific "type" of regulator I would need?

Secondly, the turbo to use. This is another gray area where opinions greatly differ. I have been looking at a Turbonetics t3/t4 (t04e) stage 5, 50 trim .63 ar. Understandably, there is alot more that goes into obtaining a certain power point then just "what turbo", but assuming the fuel is in place and the tuning is there, would it be a "big" enough turbo? I'm open to suggestions as to what turbo to use, but would really like to know if the turbo I've put all this research into would be enough.

Things to consider are the current setup at hand (besides fuel and turbo)...

*Darton sleeved block, CP 9.0:1 pistons 90mm bore, k1 rods stock stroke, balance shaft drive removed from crank, stock head (possibly P&P soon)
*AEM fi/c
*Walbro 255lph intank pump
*NGK 2 steps colder, stock wires
*Treadstone-style cast iron manifold with t3/t4 flange
*Greddy RS BOV
*A big-a$$ intercooler that will handle well over 400whp.
*Turbonetics Evolution wastegate
*4 bolt downpipe (hot side)
*2.5 inch exhaust (downpipe & downpipe back)

I appreciate any input that you guys can offer in regards to anything discussed here. I'm open to any advice so long as it isn't "manifold sucks, no boosting on a budget, blah blah blah". I would really like to use the same manifold, charge piping, and exhaust if possible. Thanks guys!

 

GT3076r

 

is it available in 4 bolt out, and a t3 style flange?

 

dont get the f/ic. get at least a dezod inline ecu, if not a full standalone. go at least 3" on the exhaust. get an equal-length manifold, (you can get to 400whp with a cast-iron manifold, but it's a lot easier this way). fuel pump, big injectors, a big turbo with at least a .82 a/r turbine housing, built short block, 20 psi, and you are there.

 

Unfortunately, it's too late on the fi/c. As far as the exhaust, can I get away with a dump right after the downpipe for those times when I up the boost?

I'd like to stay with the current manifold for now to save price. You make it sound like I could possibly get away with 900cc injectors and no return system to get 400whp....is this correct?

 

a cut-out right after the downpipe would help. as far as the no return system myself and others have made over 400whp without having one.

 

But were you running anything to aid against detonation? What size injectors?

And any suggestions for a turbo to look into?

 

dang what are you running now that you made 313whp and 320tq on 8psi??

 

im running meth with 650cc, but others have made as much without meth and with larger injectors at 20 psi. as far as turbo you will need at least a t3 60-1. its a pretty tried and true turbo. good ones can be had for as low as $700 new.

 

Believe it or not....more or less, the treadstone kit. However, I would attribute some of that to the dyno that I was on, the cold dense air of an Ohio spring, and being closer to 9 pounds.

Regardless, I can back it up with dyno sheets if need be.

Oh, and alot of credit card debt...that's the other attributing factor

 

I've been considering that more and more actually. It'd be even better if it bolts up.

 

i beleive you ive see plenty of boosted tC's to know it only takes about 8 to 9psi on the right setup to make 300whp so you already tired of 300 plus whp lol its never enough

 

so many boosted tc's in florida i bet you guys drive down the street and see like 5 boosted tc's lol

 

When the stock motor finally ate it and I had to open it up, I bought a sleeved bottom end and cannibalized the old one to build a new one. The new one should be good for alot more then 300, or even 400 for that matter. 300 is fun, but boost is like crack and I'd like more.


I think I've only seen like 5 since I've lived here....I'm sure there's more hiding though.

 

Let's assume I go with a 60-1. What size should I go with on the exhaust side? 0.48, 0.63, or 0.82 ar?

 

Watching

 

 

i have a .63 exhaust on my 60-1 and made 423whp at 20 psi.... id say the .63 was large enough and made ____ tons of torque down low and didnt give up top end.. i made 400wtq at 4k rpms on the dot and climbed from there. although i did have meth w/ 900cc injectors. we ran out of fuel at 21 psi USING meth as a fueling aid.

 

A Garrett 60-1 is around $100 cheaper then the turbo I originally looked into....I'm saving money here and there from my original budget of $3,700 so I'll probably just suck it up and do the return with some 750 or bigger injectors. So far between management and turbo alone that comes out to be $250 saved just by shopping around, which should be enough in itself to do the fuel return with the pump already being in the tank. I just wish I could find a DIY or something somewhere since trial and error takes time now that I don't have a jegs right around the corner.

I still wish I didn't have to run the return though...

 

like i said before you can achieve over 400whp with 750cc injectors i did and i had meth but was not using meth as fuel! i was at like 92% duty cycle on my injectors though and i made over 400whp and over 400trq. or get the 875cc injectors i got and your good. as long as you got a tuner that knows what hes doing.