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| Pontiac - Boost Turbo, supercharged, Nitrous, EFI & other Power Adders discussed here. |
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#1
06-05-2018, 08:30 AM
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EFI w/Dual plane manifold
I've read a few posts that the new EFI systems, Sniper/EFITech don't really like a dual plane manifold. I currently have an Edelbrock Performer RPM which is a dual plane manifold. What are my option?? Or is this not really an issue with the RPM ??
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67 Firebird Convert 455 +.060 TH400 74cc KRE d-ports piston dished 16cc H-beam rods Comp Cam 305-AH-8 cam 108* LSA 253/260 @.050 duration .577/.594 lift w/1.65 rockers Ford 9" 3.50 Detroit Locker M/T Sportsman Radials 31x18x15 on Convo Pro 15x15s |
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#2
06-05-2018, 10:19 AM
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'70 TA / 505 cid / same engine but revised ( previous best 10.63 at 127.05 ) Old information here: http://www.hotrod.com/articles/0712p...tiac-trans-am/ Sponsor of the world's fastest Pontiac powered Ford Fairmont (engine) Best time 5.13 at 140 mph (1/8 mile) , true 10.5 tire, stock type suspension https://www.youtube.com/watch?v=qDoJnIP3HgE |
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#3
06-05-2018, 11:22 AM
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Quote:
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67 Firebird Convert 455 +.060 TH400 74cc KRE d-ports piston dished 16cc H-beam rods Comp Cam 305-AH-8 cam 108* LSA 253/260 @.050 duration .577/.594 lift w/1.65 rockers Ford 9" 3.50 Detroit Locker M/T Sportsman Radials 31x18x15 on Convo Pro 15x15s |
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#4
06-05-2018, 02:04 PM
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I put a FAST EZ 2.0 on a 455/PerfRPM for a friend, and it has ran great for about 2 years now.
Another EZ2.0 inst on 350 chevy, Perf EPS also ran great. I added a 2" open spacer and no differences anywhere. I plan on testing several different intakes on my own 455/efi, on a chassis dyno, in the near future. Right hand is in a cast now though, not sure when I'll be healed enough to do it
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'73 T/A (sold). Low budget stock headed 8.3:1 455, 222/242 116lsa .443/.435 cam. FAST Sportsman EFI, 317rwhp/385rwtq on 87 octane. 13.12 @103.2, 1.91 60'. '67 Firebird [sold], ; 11.27 @ 119.61, 7.167 @ 96.07, with UD 280/280 (108LSA/ 109 ICL)solid cam. [1.537, 7.233 @93.61, 11.46 @ 115.4 w/ old UD 288/296 108 hydraulic cam] Feb '05 HPP, home-ported "16" D-ports, dished pistons (pump gas only), 3.42 gears, 275/60 DR's, 750DP, T2, full exhaust |
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#5
06-05-2018, 03:31 PM
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Would cutting a notch between the two sides make any difference ??
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67 Firebird Convert 455 +.060 TH400 74cc KRE d-ports piston dished 16cc H-beam rods Comp Cam 305-AH-8 cam 108* LSA 253/260 @.050 duration .577/.594 lift w/1.65 rockers Ford 9" 3.50 Detroit Locker M/T Sportsman Radials 31x18x15 on Convo Pro 15x15s |
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#6
06-05-2018, 04:25 PM
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Quote:
Next I'd try an open spacer. If that doesn't make a difference, then a notch won't either.
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'73 T/A (sold). Low budget stock headed 8.3:1 455, 222/242 116lsa .443/.435 cam. FAST Sportsman EFI, 317rwhp/385rwtq on 87 octane. 13.12 @103.2, 1.91 60'. '67 Firebird [sold], ; 11.27 @ 119.61, 7.167 @ 96.07, with UD 280/280 (108LSA/ 109 ICL)solid cam. [1.537, 7.233 @93.61, 11.46 @ 115.4 w/ old UD 288/296 108 hydraulic cam] Feb '05 HPP, home-ported "16" D-ports, dished pistons (pump gas only), 3.42 gears, 275/60 DR's, 750DP, T2, full exhaust |
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#7
06-05-2018, 04:33 PM
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I ran my FiTech on a P4B for about a year and a half before changing my top end and going to a torker ii.
It ran fine on the dual plane manifold. There were a few cylinders that had a bit of distribution change over the other cylinders, but nothing that would cause any concern, or register any power loss on the butt dyno. Run what you have, change it only if you notice a problem.
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-Jason 1969 Pontiac Firebird |
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#8
06-08-2018, 06:32 PM
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Quote:
__________________
67 Firebird Convert 455 +.060 TH400 74cc KRE d-ports piston dished 16cc H-beam rods Comp Cam 305-AH-8 cam 108* LSA 253/260 @.050 duration .577/.594 lift w/1.65 rockers Ford 9" 3.50 Detroit Locker M/T Sportsman Radials 31x18x15 on Convo Pro 15x15s |
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