MaxWHP with 93octane & stock head?

[UltimateBaron]

What turbo would I need on a 2.2 and 2.5 to achieve Max WHP with 93oct gas on a stock 782 head? Assume spearco intercooler, 2.5" full exhaust, 3 bar calibration, 5 speed transmission. I'm guessing 220WHP with a 2.5/Super60 and 250WHP with a 2.2/Super60. You guys know any good setup combos? Dyno plots would help too!!

[Dave]

Garret or a Super 60.

[UltimateBaron]

No hybrid? Must I port the head to use a hybrid or will I suffer major lag? I want to use a 50trim/stage III but do headwork down the road with a rebuild. In the meantime, would the my 2.5/stock head/5 speed vehicle suffer due to the head being a major restriction?

[tonyz2897]

FWIW, Alcohol injection has really upped the horsepower that our engines can make on pump gas. With proper tuning, the right turbo, a good flowing head, intercooler and exhaust, running alky for detonation control and extra fueling I'd bet a person could get upwards of 400 WHP on 93 octane. This is just a wild guess on my part though.
Tony

[Andre Parker]

You can EASILY make 220 whp with the stock Tll turbo. you can make up to roughly 240-250hp with the stock turbo. You can make up to 300hp with the S60. A ported head is a worth while investment. Providing it was done right. You'll make more power per psi of boost. Even a mild port with stock valves will help alot. If your just wanting to make 220 whp, I myself would use the stock Tll turbo, get a full 3" exhaust. The best intercooler you can afford and get a cal set up for 16-18psi set to run +20 injectors and you should easily be there. Hell, you should be close to 200 with a stone stock set up and a good exhaust without a cat.

[Timmay2]

i have a 2.5 and i dynod at 192, running very lean, at 14 psi on a stock t2 turbo and volvo ic. stock 782/swirl head.

220 is probably achievable at the same psi, just getting the fuel a bit closer to where it should be..

You wont want to stop there though.

[mo' parts]

you may suffer lag with the stg 3 wheel, unless the head flows really well.
with a stock head you will need a press. making turbo compared to a flowing turbo.
330 hp has been done on a stock head i believe, though i think they were using race fuel.

[DakotaKid]

Quote:

Originally Posted by adam89shlbydayt you may suffer lag with the stg 3 wheel, unless the head flows really well. with a stock head you will need a press. making turbo compared to a flowing turbo. 330 hp has been done on a stock head i believe, though i think they were using race fuel.

You are correct.
I made 337 whp with my 2.2 with a stock long block.
I was using race gas because of the safety factor.
I was using a T3/T4 50 Trim, .63 Exhaust, Stage 3

I would guess you could make about 300 whp with an untouched head.
Just be sure you have the proper cooling.

[glhsken]

Made 290 with pump gas on a stock head and 22 psi. Car was not tuned well. 1st try with the calibration. Needed lots of work. t3/4 50 with stage II.

Stock turbo I managed over 250whp on pump gas (stock head) at 18psi. Of course that was a 2.2. The 2.5 will make more torque than a 2.2, but I've NEVER seen one make more hp

[mo' parts]

Quote:

Originally Posted by TrboVan You are correct. I made 337 whp with my 2.2 with a stock long block. I was using race gas because of the safety factor. I was using a T3/T4 50 Trim, .63 Exhaust, Stage 3 I would guess you could make about 300 whp with an untouched head. Just be sure you have the proper cooling.

the saftey factor was mostly for the stock mahles, wasnt it?
was this on a auto or manual? curious about the stage 3 wheel lag.(with a stock head) thanks

[DakotaKid]

Quote:

Originally Posted by adam89shlbydayt the saftey factor was mostly for the stock mahles, wasnt it? was this on a auto or manual? curious about the stage 3 wheel lag.(with a stock head) thanks

Yes, because I was running the cast pistons.
Automatic.
Lag was not really an issue once I got it sorted out.
It was fun to drive on the street like that.
I do have a video of the lag time somewhere.

-Bryan

[moparzrule]

I'm shooting for 300 WHP on 93 at 22 PSI, only I have a stage 1 G head so not only does it flow better it lowers compression to run more boost/more advance on a given octane. Paul from TU said at 22 PSI with a 2.2 G head he can have a no knock retard cal for me.
A ported head is a BIG time plus, I finally sorted things out today and got my car running good on a stock ECU for now. At 13 PSI (and running WAY rich) my car is faster than is was with 21 PSI (at a perfect tune, 1500 EGT's) on a stock swirl head. I also switched to the .63 turbine and my turbo spools FASTER than it did before with the .48 due to the ported head. I blew an IC hose tonight, when I went to fix it (i left the car running) I got air blowing at me at an idle with a super 70 turbo LOL