porting stock cast manifold and elbow

veteran Posts : 587 Join date : 2011-06-28

looking to get my supra stock cast turbo manifold ported..is it worth it in the end? i chose this because i think it can be ported to flow little bit better and i dont have money to buy a nice manifold for over few thousands. so if its worth it then who in town ports cast material?

Subject: Re: porting stock cast manifold and elbow Tue Mar 13, 2012 5:14 pm

as a rule, porting is always a good idea. to a point. for instance.. i think i remember hearing that porting and polishing b-series intake manifolds wasn't always a good idea, as it reduced the air and fuel's ability to mix properly (it tends to rely on the the rough air to mix the fuel droplets). i'm just kinda paraphrasing what i heard LONG ago. not sure if it was right or not..

anyway.. porting is usually cool. i couldn't imagine a reason not to. you are removing the "steps" between the parts that cause serious disruption to the flow of air. when i had my evo i did my exh manifold because there was almost 1mm difference in some places. it was horrible. i'm not so sure i'd attack aluminum on my own, though. LOL.

good luck, yo.

regular Posts : 288 Join date : 2011-04-27

kaj wrote:: as a rule, porting is always a good idea. to a point. for instance.. i think i remember hearing that porting and polishing b-series intake manifolds wasn't always a good idea, as it reduced the air and fuel's ability to mix properly (it tends to rely on the the rough air to mix the fuel droplets). i'm just kinda paraphrasing what i heard LONG ago. not sure if it was right or not..

anyway.. porting is usually cool. i couldn't imagine a reason not to. you are removing the "steps" between the parts that cause serious disruption to the flow of air. when i had my evo i did my exh manifold because there was almost 1mm difference in some places. it was horrible. i'm not so sure i'd attack aluminum on my own, though. LOL.

good luck, yo.

he isn't talking about the intake kaj, he's talking the factory cast turbo mani. but just to clarify your statement, smooth porting on the intske side will make fuel "stick" to the runners vs. "golf ball" effect the cast or a rough port would have. \

either way one would assume that since it's a turbo car and you want more volume, just crank up the boost!!

Subject: Re: porting stock cast manifold and elbow Tue Mar 13, 2012 5:49 pm

sorry. i didn't sleep last night. i'm tired. haha. anyway.. so the exh mani? cast iron? doit. sure!

unless you are trying to squeeze every bit of power, it may not be worth it if the ports aren't that bad. as mentioned above, you can just turn up the boost. haha. N/A cars don't have this luxury. to be honest, i mostly did mine because it was off already and free to do. did it help spool my stock turbo? probably not. did i make any more power? probably not. but i felt all warm and fuzzy inside. LOL. i just like working on my cars.

veteran Posts : 587 Join date : 2011-06-28

U did mention exh manifold in your first post. Lol. Just turn up the boost?? Why i cant because i dont think i can squeeze out much with an upgraded turbo on stock mani. Maybe i can but i just wanted to know before hand if porting it will help also but for sure the elbow does need it tho as it is small and very restrictive unless i can find someone who can cut me a flange and make me a 3 inch elbow.

Subject: Re: porting stock cast manifold and elbow Tue Mar 13, 2012 10:24 pm

Making an elbow sounds like the best bet. Assuming the outlet/inlets are actually 3".

veteran Posts : 587 Join date : 2011-06-28

Anyone in town that can cut me a flange?

Subject: Re: porting stock cast manifold and elbow Wed Mar 14, 2012 2:50 pm

You can order flanges. Usually $3-5 each.

veteran Posts : 587 Join date : 2011-06-28

Looked everywhere already. My flange can not be found. Idky

regular Posts : 288 Join date : 2011-04-27

Mynes_3 wrote:: Looked everywhere already. My flange can not be found. Idky

isn't the stock turbo a t25 flange? that should be easy to find online

veteran Posts : 587 Join date : 2011-06-28

No. Flange i need is for the back of the turbo where the elbow or dp is. It looks like a t3 but bigger

Subject: Re: porting stock cast manifold and elbow Wed Mar 14, 2012 9:10 pm

I doubt it's bigger than a t3. Not if turbos are stock.

veteran Posts : 587 Join date : 2011-06-28

Not sure if its bigger or not but thie is the one i need. The gasket should tell how i needed the flange. The biggest one is what i need

http://thumbs1.ebaystatic.com/m/mzmsNNy4Y01A7RQ0cVABcUA/140.jpg

Subject: Re: porting stock cast manifold and elbow Wed Mar 14, 2012 10:19 pm

A bit more than I thought:

Turbo outlet flange

Fits the stock or upgraded CT26 turbo. Made from 3/8" think mild steel. CNC laser cut.

Price $30

http://www.bicperformance.com/products.htm

it looks like most people are doing ct26 to t3 conversions:

http://www.amazon.com/gp/aw/d/B002UN8N5Y/ref=redir_mdp_mobile

veteran Posts : 587 Join date : 2011-06-28

forgot to mention its not a ct26 turbo. its a ct15b

Subject: Re: porting stock cast manifold and elbow Thu Mar 15, 2012 10:26 am

That would have been good to know before I spent all that time Googling for ya. Smile

veteran Posts : 587 Join date : 2011-06-28

Sorry kaj!

Subject: Re: porting stock cast manifold and elbow Thu Mar 15, 2012 6:18 pm

Mynes_3 wrote:: Sorry kaj!

i'll live. Wink

i googled under "shopping" and web search. worse comes to worse, i know a guy with a six-axis machine that can make anything. if he had your turbo, he could cut you a flange. i don't think it's any more expensive than a store-bought one, either.

veteran Posts : 587 Join date : 2011-06-28

Mind giving me his info and estimate price ull think? Thanks

Subject: Re: porting stock cast manifold and elbow Thu Mar 15, 2012 11:24 pm

Mynes_3 wrote:: Mind giving me his info and estimate price ull think? Thanks

i'll look up the name of his shop. he was next door, so we just know him from that.. i can't remember it's name though. LOL. he'll have to give you the quote.

veteran Posts : 587 Join date : 2011-06-28

Thanks

Subject: Re: porting stock cast manifold and elbow Fri Mar 16, 2012 1:23 am

Vision CNC

ask for Abel. Tell him Jason and Robert from Clovis Custom Audio sent you.

veteran Posts : 587 Join date : 2011-06-28

Cant find no number only address

Subject: Re: porting stock cast manifold and elbow Fri Mar 16, 2012 2:05 am

Weird. I have his cell number. I'll ask if it's okay to give out

regular Posts : 288 Join date : 2011-04-27

give Bob at Turbo Performance a call he's the man! guaranteed i bet he can get you aflange (818) 994-7087