Aftermarket Runners and Big mouth base
Thread Starter
Member
Joined: Jul 2000
Posts: 179
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From: Lake Oswego, OR, USA
Aftermarket Runners and Big mouth base
How do aftermarket runners and TPIS big mouth manifold base effect gas mileage?
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1991 Z28 305 5spd 1LE, TES headers, dual cats, 3 Chamber flowmaster, Comp cams .488/.495 212/218, 187 head castings with bigger valves, self-burned eproms.
Gained 20HP by porting and polishing my EGR passage.(some people take this seriously)
All work done by myself, and proud of it!
Find a .bin on the internet and want it burned? I'll do it for you!
------------------
1991 Z28 305 5spd 1LE, TES headers, dual cats, 3 Chamber flowmaster, Comp cams .488/.495 212/218, 187 head castings with bigger valves, self-burned eproms.
Gained 20HP by porting and polishing my EGR passage.(some people take this seriously)
All work done by myself, and proud of it!
Find a .bin on the internet and want it burned? I'll do it for you!
Supreme Member
Joined: Nov 2000
Posts: 1,078
Likes: 0
From: San Antonio, TX
Car: Damn
Engine: This
Transmission: New Stuff
I'd imagine, if anything they would make it better. It would increase the efficiency of your engine, thus better milage.
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'88 RS (originally 2.8)
-350, .040 over, vette alum. L98s, stock tpi.
-305 injectors & chip
-TES headers & edelbrock cat back
-3.73 gears, 700r4.
Best with 2.8-17.4@77mph
Best with 305-15.0@93mph
Best with 356-13.7@101mph
on a 2.050 60 ft.
(Damn the 2.8!)
------------------
'88 RS (originally 2.8)
-350, .040 over, vette alum. L98s, stock tpi.
-305 injectors & chip
-TES headers & edelbrock cat back
-3.73 gears, 700r4.
Best with 2.8-17.4@77mph
Best with 305-15.0@93mph
Best with 356-13.7@101mph
on a 2.050 60 ft.
(Damn the 2.8!)
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