What to tune when a much bigger turbo is installed?

Ozer · 11-08-2005, 01:30 AM

Finally, I'm almost done installing all the parts. I'm only left with the Superzilla55 Turbo, Tial44mm External Wastegate, and APEXI AVC-R (will let the pro. tuners use it for max whp). But now I'm afraid! They say, SZ55 can push enough air, even at 10 pounds to blow the hell out of the engine.

Does anyone know what needs to be tuned? My idea is:
- make the max boost 10 psi (as a beginning point),
- check out the AFR values, and tune the fuel table and air intake table

Wastegate table now looks scary. This beast (Tial 44mm, which is the most fancy looking upgrade under my hood

) has a 1.0 bar spring, and I was told it can be used for boosts up to 32 pounds!

I just don't want to blow up the engine right when I got sooo close to hitting 400 whp

Well, I guess I will play with it a little, and let it tuned by a tune-shop for that horsepower, but I will not give it to them before I play it myself

- Ozer

Notmysti · 11-08-2005, 08:24 AM

dude, you gotta give props to your installer. thats ME haha. i like to call me shop AVP Tech. just so every one knows. i think it will be ok.

RacerXS · 11-17-2005, 05:02 PM

I would contact Christian from COBB, he gave me a base map to run until I could get it properly dyno tuned. he is just going to need the specifics about your car. It worked out very well for me & I got 400 out of an SZ49......you should get 440+ out of a 55 Fat Boy with external WG. All nice mod choices BTW.

11-08-2005, 01:30 AM	#1
Ozer Senior STI Driver Car: [Sold]'05 Subaru STi Fav Mod: Tial 44mm EWG w/ 1.0 bar spring Posts: 336 Join Date: Aug 2005 Trader Rating: (4)	What to tune when a much bigger turbo is installed? Finally, I'm almost done installing all the parts. I'm only left with the Superzilla55 Turbo, Tial44mm External Wastegate, and APEXI AVC-R (will let the pro. tuners use it for max whp). But now I'm afraid! They say, SZ55 can push enough air, even at 10 pounds to blow the hell out of the engine. Does anyone know what needs to be tuned? My idea is: - make the max boost 10 psi (as a beginning point), - check out the AFR values, and tune the fuel table and air intake table Wastegate table now looks scary. This beast (Tial 44mm, which is the most fancy looking upgrade under my hood ) has a 1.0 bar spring, and I was told it can be used for boosts up to 32 pounds! I just don't want to blow up the engine right when I got sooo close to hitting 400 whp Well, I guess I will play with it a little, and let it tuned by a tune-shop for that horsepower, but I will not give it to them before I play it myself - Ozer This ad is not endorsed by this member. Please register or login to hide this ad. Last edited by Ozer : 11-08-2005 at 01:34 AM.

11-17-2005, 05:02 PM	#3
RacerXS S204 Racer Car: 05' Sti Black Fav Mod: Dyslexia Location: Central, NJ Posts: 3,360 Join Date: Oct 2004 Trader Rating: (13)	I would contact Christian from COBB, he gave me a base map to run until I could get it properly dyno tuned. he is just going to need the specifics about your car. It worked out very well for me & I got 400 out of an SZ49......you should get 440+ out of a 55 Fat Boy with external WG. All nice mod choices BTW. This ad is not endorsed by this member. Please register or login to hide this ad.

11-08-2005, 08:24 AM	#2
Notmysti Amateur STI Driver Car: 05 sti Fav Mod: is doing it again, lol Location: kirkland Posts: 26 Join Date: Aug 2005 Trader Rating: (0)	dude, you gotta give props to your installer. thats ME haha. i like to call me shop AVP Tech. just so every one knows. i think it will be ok.