before the new turbo, i had a idea.....

[boost fiend]

ok, im getting ready to put in my new turbo and had a great idea(i think). im going with a 60 trim ct-26 and thought about porting the exaust manifold.
im also wondering about spool time with the bigger turbo versus a stock ct.

anyone got some good insight?????

 

[GrimJack]

I did not port mine. I get positive boost by 1700 rpm and full boost by 2700 rpm.

 

[boost fiend]

and thats with a modifided ct-26? are you still using stock size ic pipes/ic?

 

[GrimJack]

Yes, that's a 60-1 upgraded CT. I am not using the stock IC pipes, I am still using a stock IC though.

 

[boost fiend]

sweet!!!! my upper pipe is diffrent than stock but the same size. i think im gonna like this. thanks for the input grimjack!!!

 

[jam4484]

Wouldn't porting the exhaust manifold be a bad idea? I know you do not want to port the exhaust ports on the head because you want to have as much pressure as possible to spool the turbo right or am I way off?

Jon

 

[boost fiend]

i was under the idea that the more air to pass the hot side of the turbo the faster it is gonna spool up. but then again, i could be wrong. the more air you get out of the engine = more air you can pack into the engine.

 

[GrimJack]

As always, it depends on your power goals. If you're looking at a max of anywhere around 400, I don't think the exhaust manifold is going to present a problem.

 

[boost fiend]

in the long haul id like to see about 500 hp 500 fp/tq. either or. thanx for the insight.:evil2:

 

[mkIIIman089]

It is insanely expensive to get the manifold ported as well. Not worth it in the long run.

extrude honing is like 600 buck too.

For a power goal like that I would not be using anything short of a full kit like HPF or any of the full SP kits.

 

[boost fiend]

machine shop prices are not my concern. i can have it done through the shop i work at for next to nothing. like milling my head cost me less that $200 even. and thats the whole nine yards(valve grind, port/polish, new valve guides, yadda yadda yadda.)

 

[Joel W.]

i went to wall mart and bought a cheapass 15$ air die grinder. i already had bits, im sure the bits more than the grinder was ...it took me a few hrs too match the turbo flange on the manifold to the flange gasket. I smoothed out the inside casting marks and opened it up alot inside and make it flow. It did seem to "feel" quicker. but i had high expectations.. lol It sure didnt seem to make it spool any slower for sure.. so i think its good.. more air flow cant be a bad thing..

 

[lowbudgettarga]

i didn't port my exhaust manifold much, but i did my best to polish it as much as possible and get rid of the big lumps inside of it from the studs for the heat shields. I did all htat for my first supra, but got another with a BHG before i finished my first one and ended up using it on the new one so i don't have any comparison really (firs supra=5 spd, 2nd supra=auto), but it sure does spool really well.

 

[boost fiend]

well i geuss i know what im doing here as soon as the new turbo winds up on my workbench!!!