CrossFire Injection build suggestions?
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Junior Member
Joined: Feb 2016
Posts: 2
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From: Iowa
Car: 83 Z-28
Engine: 305 crossfire "Renegade setup"
Transmission: 700-R4
CrossFire Injection build suggestions?
83 Z-28
Yes I know everyone hates on the Crossfire but it's a rare set up that I want 2 keep.
Looking for idea's on how I should milk some extra power.
Also idea's on how I could increase the MPG while keeping it around standard HP ect would also be nice.
Last edited by Mark Stanley; Feb 20, 2016 at 09:23 PM.
Supreme Member
Joined: Jan 2009
Posts: 2,314
Likes: 115
From: belle fourche,s.d.
Car: '82 z28
Engine: L83 5.7
Transmission: 700r4-1985
Axle/Gears: 3.42 posi
Re: CrossFire Injection build suggestions?
lots of performance potential with the crossfire-I made a lot of modifications to mine.First things for a stock 305 crossfire include:
-exhaust upgrade-LU5 has better setup than LG4,but could still benefit from improvement-an L69 setup or equivalent would be enough.
-fuel pump upgrade/fuel pressure increase -FPR can be modified to turn pressure up to ~14-15 PSI
-intake manifold modification /porting-even just a rounding/smoothing of runner entrance will help,but more extensive work will get a big increase in flow.
-camshaft upgrade-LU5 uses same cam as '86 "small cam" TPI 305 -could upgrade to cam similar to L69/85"big cam"TPI 305/'vette L83,L98 350,ETC.
-exhaust upgrade-LU5 has better setup than LG4,but could still benefit from improvement-an L69 setup or equivalent would be enough.
-fuel pump upgrade/fuel pressure increase -FPR can be modified to turn pressure up to ~14-15 PSI
-intake manifold modification /porting-even just a rounding/smoothing of runner entrance will help,but more extensive work will get a big increase in flow.
-camshaft upgrade-LU5 uses same cam as '86 "small cam" TPI 305 -could upgrade to cam similar to L69/85"big cam"TPI 305/'vette L83,L98 350,ETC.
Joined: Dec 2001
Posts: 9,941
Likes: 642
From: Chicagoland
Car: 1989 IROC-Z. Original owner
Engine: LB9. Dual Cats. Big Cam
Transmission: World Class T-5
Axle/Gears: BW 3.45
Re: CrossFire Injection build suggestions?
lots of performance potential with the crossfire-I made a lot of modifications to mine.First things for a stock 305 crossfire include:
-exhaust upgrade-LU5 has better setup than LG4,but could still benefit from improvement-an L69 setup or equivalent would be enough.
-fuel pump upgrade/fuel pressure increase -FPR can be modified to turn pressure up to ~14-15 PSI
-intake manifold modification /porting-even just a rounding/smoothing of runner entrance will help,but more extensive work will get a big increase in flow.
-camshaft upgrade-LU5 uses same cam as '86 "small cam" TPI 305 -could upgrade to cam similar to L69/85"big cam"TPI 305/'vette L83,L98 350,ETC.
-exhaust upgrade-LU5 has better setup than LG4,but could still benefit from improvement-an L69 setup or equivalent would be enough.
-fuel pump upgrade/fuel pressure increase -FPR can be modified to turn pressure up to ~14-15 PSI
-intake manifold modification /porting-even just a rounding/smoothing of runner entrance will help,but more extensive work will get a big increase in flow.
-camshaft upgrade-LU5 uses same cam as '86 "small cam" TPI 305 -could upgrade to cam similar to L69/85"big cam"TPI 305/'vette L83,L98 350,ETC.
I am 99.9% positive that the LU5 came with the L83 cam.
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