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03-14-2020, 12:37 AM #1
LTX Member
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- Offline
- Join Date
- Mar 2020
- Name
- Sam
- Vehicle
- 1994 Firebird Trans Am
- Posts
- 4
Gains from porting the welds on Pacesetter headers
Has anyone ever measured the gains from porting the inside of the welds between the flange and primary runners?
I decided to clean up my pacesetter headers cause it looked pretty restrictive. These worked great for years on my stock LT1 but since they are going back onto a 383 LT1 I am looking to maximize the performance. I don't feel worried about the material removal since the welds seemed to have good penetration. So far I've done 3 of 8. For reference these are 1-3/4 primaries and 3" collector.
IMG_6468.JPGIMG_6464.JPGIMG_6467.JPGIMG_6466.JPGIMG_6465.JPG'94 Trans Am LE2 HCI, 383 11.24:1 forged Eagle crank 6" H-beam rods, Mahle pistons, ATI damper, Moroso 7qt pan, 36lb/hr injectors, Pacesetter LT headers, 3" x-pipe + dumps, SLP CAI, EWP, Strange 12 Bolt posi 4.11, Stage 2 T56, McLeod StreetPro
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03-18-2020, 01:18 PM #2
10 Second N/A Club
- Status
- Offline
- Join Date
- Sep 2008
- Name
- Josh
- Vehicle
- 96 Z28
- Location
- Holden, MO (KC)
- Posts
- 2,867
I opened up the welds on mine when I had Pacesetters, I don't know if it made any difference but I figured it couldn't hurt. Some of the weld was pretty restricting or at least it appeared to be.
-Josh
co-owner of BDBRacing.com
NMCA OC 9004
96, N/A 385, Holley EFI, Faceplated M6, AI TFS heads, LE SR cam, MWC Fab 9
10.16 @ 136 1.50 60'........still workin on that 60' shootin for 1.4's!
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