| Author |
Message |
Corwin
Samba Member
Joined: March 29, 2007
Posts: 798
|
 Posted: Mon Sep 03, 2007 6:15 pm Post subject: Exhaust size question |
 |
|
I know - SEARCH, right? Well I can't find any real info on this so I'm asking for direct input. 
I've got a pretty heavily built 1915cc - dual 46mm carbs, Engle 120 cam, fully balanced, lightened flywheel, full MSD ignition, ported/ploished heads, etc. etc. I know I'm right on the border of getting the best results from either a 1.5" or 1.625" exhaust and I want to know which one is best for street driving.
This car (Ghia) is going to be a weekend warrior and not used for drag racing. Basically I want to tear ass around town and beat down Hondas, which means I'd prefer low end torque to upper end hp. Does this mean the 1.5" inch or would 1.625" still be better?
Thanks guys. |
|
| Back to top |
|
 |
grimace007
Samba Member
Joined: August 30, 2006
Posts: 2673
Location: swampville, florida
|
| Posted: Mon Sep 03, 2007 6:22 pm Post subject: |
|
|
if your heads have alot of portwork go with the larger.
if they have a small amount go with 1.5
_________________
Brian
68 sedan
Dallas Air Coolers
| perrib wrote: |
Hey It is The Samba where well thought out rational answers can take a while and getting side tracked is normal. I was just lucky this time.  |
| cr@M wrote: |
No one has any personal responsibility these days. This country is sue happy. Intelligence is no longer a requirement, just an accessory. |
|
|
| Back to top |
|
|
krusher
Samba Member
Joined: September 24, 2002
Posts: 7652
Location: europe
|
| Posted: Mon Sep 03, 2007 11:45 pm Post subject: |
|
|
| How about the valve sizes and who ported the heads? |
|
| Back to top |
|
|
cuffem
Samba Member
Joined: July 31, 2007
Posts: 27
Location: Texas
|
| Posted: Tue Sep 04, 2007 2:18 pm Post subject: |
|
|
| I will be running similar to your setup and was told to run 15/8 exhaust. I have 40x 37.5 valves ported and polished by Fred Simpson of Performance Technology. |
|
| Back to top |
|
|
The Noof
Samba Member
Joined: January 25, 2005
Posts: 4346
|
| Posted: Tue Sep 04, 2007 2:21 pm Post subject: |
|
|
| 1 1/2. |
|
| Back to top |
|
|
|
