ok, i know this has prolly been discussed already, and i did search for 10 mins but i cant find anything that fits what im wanting to know.
i would like to know what kinda gains can i expect from upping my tb size from stock b16 (60mm) to a 65mm blox tb? i mean will 5mm really make a difference? and i should add that my car is boosted. thanks.

 

to be honest imnot sure if or how much power will be increased but 1 thing i can say is. 65mm to 60mm is slightly better and therefore more air gets passed. i highly doubt you would get a great 10hp out of it but most likely some response time and better breathing. try to google it up man

 

yeah i have googled it, it took me here, lol yeah i have read that averages are 7-12hp, i am running a skunk2 64mm port int mani, so my tb will be 1mm larger than the mani, so my guess is 1mm bigger is better than 4mm smaller, ya know? but response is what im really looking for, cuz as of right now, with 9 pse on a 50 trim t3, my bottom end sucks royally but my top end, is awesome im getting 210whp and im running 9.1 in the 1/8th with street tires stock tire pressure, not too shabby from 11.04secs. so i gained about 2 secs off my time. but yeah im mainly trying to get the turbo to spool as fast as possible. whats the input on log vs tubular exh manifolds?

 

What Intake Manifold are you running? Remember, not matter how big your TB is, if you don't have an Intake Manifold that works with it, your not going to reap in the full benefits.

 

I think you'll see an improvement since it's bigger and closer to port matching your intake manifold. 7-12 is pretty optimistic though.

 

You won't see any real horse power gain. It may feel like that however with the throttle response gain that you will definitely see from it.

 

^x2. You'll have snappier throttle response for sure, so that'll fool the butt dyno. On a real dyno, probably a couple of whp. I saw very little increase when I went from a 60mm to a 70mm port matched to my S2 Pro IM...maybe 4-5 whp.

fm

 

best to get it matched tb to im
check out maxbore.com

 

yeah im running the skunk2 pro series intake mani with a 64mm port and the runners have been ported too, not alot cuz the runner walls are already thin to reduce weight, before i boosted it, it sounded like i had a huge turbo when i was in the throttle cuz it whistled LOUD! i had really good low end torgue, but when i boosted it, i lost it all, im thinking i need to switch to a different exh mani, im running a tubular, not egual length, exh mani, i have a inline pro log that im thinking about putting on, any input?