High flow exhaust...up the fuel pressure?
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Joined: Feb 2000
Posts: 313
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From: Columbus, Ohio, USA
Car: 88 IROC-Z (Sold)
Engine: 5.7L
Transmission: 700R4
High flow exhaust...up the fuel pressure?
I have had a 3" Flowmaster cat back for a year and I just installed my Edelbrock headers last week on my 88 TPI. I noticed that I have lost some of my low end power, I am assuming due to less back pressure. Will adjusting the fuel pressure help to get some of that low end back, or should I look elsewhere? My modifications are below if that helps. Thanks
Matt
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irocet@hotmail.com
drive.to/Stang_Kilr
88 IROC-Z -- 350 L-98, 700R4, Flowmaster, Edelbrock Headers, Catco Cat, K&N, MAF Sceens Removed, Airfoil, March Pullies, Comp Cams Magnum 1.6 Roller Rockers, Bosch Platinum Plugs, Accel 8.8 mm Wires, MSD 6AL, Hypertech Cap & Coil, Hypertech Chip, Hotchkis Strut Tower Brace
Matt
------------------
irocet@hotmail.com
drive.to/Stang_Kilr
88 IROC-Z -- 350 L-98, 700R4, Flowmaster, Edelbrock Headers, Catco Cat, K&N, MAF Sceens Removed, Airfoil, March Pullies, Comp Cams Magnum 1.6 Roller Rockers, Bosch Platinum Plugs, Accel 8.8 mm Wires, MSD 6AL, Hypertech Cap & Coil, Hypertech Chip, Hotchkis Strut Tower Brace
Supreme Member
Joined: Jul 1999
Posts: 5,183
Likes: 42
From: Oakdale, Ca
Car: 89 IrocZ
Engine: L98-ish
Transmission: 700R4
You probably will need to bump the pressure up some for WOT performance...freer flowing exhaust will scavenge more charge, hence the need for more fuel.
But at cruising and part throttle, the ECM should compensate based on the BLM and O2 reading.
But at cruising and part throttle, the ECM should compensate based on the BLM and O2 reading.
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