I am upgrading to a larger turbo next month and wanted to know what whp I might get with a GT35R at 16 psi with 8:8-1 compression on 103 octane. And tuned safe with my AEM EMS and a custom 3 1/2 -4 inch down-pipe (no exhaust)?

Also with 25-30 psi with same compression?

And should I consider a larger dual ball-bearing turbo?

Thanks

 

You should be anywhere in the 450-550whp range on that gas. Its a very vauge answer, as is the question because its dependant on so many variables, but based on your setup, Id say my guess is rather close.
On 25+psi, you may need higher octane, but expect well over 500whp.
I have a customer who has consistently dynoed 600+ on 22, 23psi with race fuel, so thats another set of numbers to bounce around...

 

Is he running a thicker head gasket to accommodate all that boost? If so, what size?

 

fully built motor...9:1CR

 

at 21psi I made 549..... i ran out of injector. i could have made more but oh well

 

At 20 psi I ran a little over 580 whp. That was on a mixture of 4 gallons of 93 octane and 2 gallons of methanol which I estimate to be about 98 octane. I too was running out of injectors. I've since up'd my fuel pressure by 10 psi and am working on adjusting the MAP. My compression ratio is about 8.7:1.

 

Thanks for the help. I plan to upgrade to a GT35R and a new manifold and should be done by next month. I will be running the mods I currently have in my sig @ 16psi on 103.

Then right away I plan to start ordering parts to build my motor and would like to be running 25psi+. So do you know what size and brands of...

1. Compression
2. Rods
3. Sleeves
4. Injectors

and anything else I will need engine wise that is not in my sig?

Thanks

 

The Lovefab mani and downpipe look SICK!!!!!!!!!


I can't wait to get that shit on.

 

post some pics, but what Im really anxious for are numbers!!! As are the rest of us, as it was the point of the thread