Exhaust port matching

Reply Subscribe

Thread Tools

Search this Thread

Oct 18, 2025 | 10:19 AM

#21

Che70velle

ModSquad

iTrader: (6)

Joined: Jan 2012

Posts: 7,774

Likes: 5,088

From: Dawsonville Ga.

Quote:

Originally Posted by SteveJewels

Appreciate the info. That was a concern. I am working with BES Bischoff. Handy link to Bischoff Racing Engines

They are about an hour or so drive so I can pick up the engine and drag it back to Dayton.

Much, much better! Keep us posted.

Dec 13, 2025 | 11:46 AM

#22

G8 Drew

Staging Lane

Joined: Oct 2025

Posts: 89

Likes: 32

The fact the LS exhaust are “D” ports cuts down on reversion. A easy way to port the exhaust is smooth out the top of the port only. Since you have 1 3/4” headers you can’t do much. 1 7/8” leave more room around the port to support anti reversion.

Dec 13, 2025 | 08:21 PM

#23

SteveJewels

Thread Starter

Launching!

Joined: Sep 2008

Posts: 221

Likes: 45

From: Dayton, OH

Quote:

Originally Posted by G8 Drew

Since you have 1 3/4” headers you can’t do much.

Where did you get that idea? I have 2" headers.

Dec 14, 2025 | 08:23 AM

#24

G8 Drew

Staging Lane

Joined: Oct 2025

Posts: 89

Likes: 32

My mistake . With 2” port away.

Dec 14, 2025 | 11:46 AM

#25

IGN-1A

TECH Enthusiast

Joined: Aug 2021

Posts: 507

Likes: 190

Fueling Cones

Jim Fueling Cones (RIP 2002) are the BEST method to lower Reversion.
He asked for my help, he required the BEST ignition system for his Dyno Testing (bench)

No more missfiring!
Lance

Reply Subscribe

Reply Share

First
Prev
2 / 2
Next
Last