TPI Intake Porting Questions

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Sep 1, 2016 | 08:51 AM

IrocJoeCool

Thread Starter

Junior Member

Joined: Apr 2004

Posts: 9

Likes: 0

From: Alabama

Car: 1989 GTA, white, T-top, 5 speed car

Engine: 383, stuff

Transmission: T56

Axle/Gears: 3.42

TPI Intake Porting Questions

I have a 350 roller block with an LT4 Hot Cam, AFR 195 heads, headers and 1.6 roller rockers. Car is also getting a T56 and 3.42 rear.

I have a stock base, stock plenum and Accel runners.

What should I port/Siamese? I cannot weld aluminum. I was planning on siamesing the base and intake. Then siamesing a inch or two in both ends of the runners.

Is this a good idea?
What advice can you offer?

Sep 1, 2016 | 09:48 AM

TTOP350

Supreme Member

iTrader: (9)

Joined: Oct 2001

Posts: 12,214

Likes: 1,140

From: Il

Car: 1989-92 FORMULA350 305 92 Hawkclone

Engine: 4++,350 & 305 CIs

Transmission: 700R4 4800 vig 18th700R4 t56 ZF6 T5

Axle/Gears: 3.70 9"ford alum chunk,dana44,9bolt

Re: TPI Intake Porting Questions

Just do the top side of the runners down as far as you can go. The stock base will need a LOT of port work.

Last edited by TTOP350; Sep 1, 2016 at 11:04 AM.

Sep 1, 2016 | 09:54 AM

IrocJoeCool

Thread Starter

Junior Member

Joined: Apr 2004

Posts: 9

Likes: 0

From: Alabama

Car: 1989 GTA, white, T-top, 5 speed car

Engine: 383, stuff

Transmission: T56

Axle/Gears: 3.42

Re: TPI Intake Porting Questions

Thanks for the help. Thanks for also not suggesting an alternative intake.

Sep 1, 2016 | 12:48 PM

lt500r55

Junior Member

Joined: Oct 2000

Posts: 40

Likes: 2

From: toledo,ohio

Car: 1989

Engine: 5.7

Transmission: auto

Axle/Gears: 2.77

Re: TPI Intake Porting Questions

While I am no expert I have been porting a stock base for awhile and have just started welding on it. I followed the walls and was amazed how much I got out of it. Top and bottom sides there is a lot there. Keep at it an take your time and I would be interested in your outcome. Dan