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#1
10-12-2017, 09:33 PM
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E85 Plug Gap?
Hey Guys - I have a 455 Pontiac with E heads and 12.5 - 13 to 1 and E85. I have MSD 6AL, Billet Dist, Blaser 2 coil and Firecore wires with NGK's #7 gapped .028 to .030 - Ignition locked with rotor phasing adjusted.
What is a good GAP for this Plug Set up? Thanks, Again, Craig |
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#2
10-13-2017, 05:14 AM
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I run both my e85 car's with out of the box gaps. Pretty sure 030 is the norm
__________________
1969 carousel red firebird 455, richmond 5 speed 1964 540 gto 1971 lemans sport convertible 1972 Maverick under slow construction |
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#3
10-13-2017, 07:46 AM
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I would change the heat to a #8 and gap at .035
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My Half AN Injun..... |
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#4
10-13-2017, 12:06 PM
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charlie, what are you at for compression and whose carb? Are you turbo?
both my corn cars have Sullens Carbs on them
__________________
1969 carousel red firebird 455, richmond 5 speed 1964 540 gto 1971 lemans sport convertible 1972 Maverick under slow construction |
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#5
10-13-2017, 12:58 PM
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Not high , 11.4 to 1 . Cranking psi is 185. One is N/A and the other one is turbo.
I have a 1050 on the 11.4 to 1 car .Its a Holley tuned by me..
__________________
My Half AN Injun..... |
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#6
10-13-2017, 02:07 PM
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have you tried both heat range plugs?
__________________
1969 carousel red firebird 455, richmond 5 speed 1964 540 gto 1971 lemans sport convertible 1972 Maverick under slow construction |
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#7
10-13-2017, 02:31 PM
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Ive tried 8-9-10 in my N/A car , and 7-8-9-10 in my turbo car..
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My Half AN Injun..... |
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#8
10-14-2017, 09:17 PM
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Thanks guys - the #7 now at .032 out of the box and switch to #8 during the warm weather.
Thanks Again, Craig |
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#9
10-15-2017, 09:40 AM
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Quote:
Charlie, are you burning E-85?
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1969 Firebird, Tx3-455/468 machined by CVMS E-heads by Dave Wilcox/Comp Cams 300B-6 flat solid 850DP on E-85 by Eric Niefert/T2 1" plastic spacer T-400/PTC 4000/390's/30x9 Hoosier radial slicks,#3400 1.38 60' 6.32 @ 108 MPH at Northeast Dragway NC 5/23/15 (9th pass on new engine) https://m.youtube.com/watch?v=ePCu2v...ature=youtu.be 1.37 60' 6.26 @ 109 half track, 9.86 @ 136 1/4 mile, #3350 11/26/16 at Richmond Dragway (125th pass on new engine) |
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#10
08-31-2023, 07:29 PM
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How big of a factor does ignition spark intensity play?
I’m about to change to a NGK 5671-7 or NGK 5671-8 from a NGK 5671-10 and I’m looking for a gap recommendation. A heat range recommendation would be nice as well. I’m thinking the 8’s are going to be the recommendation but I figured I’d ask. 13.8-1 484 with highports and Holley EFI. I’m running Holley smart coils with 5.0 milliseconds dwell time
__________________
James 1970 Trans Am Spotts Built 484" IA2, Highports, EFI Northwind Terminator X sequential EFI fabrication and suspension by https://www.funkhouserracecars.com/ |
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#11
08-31-2023, 07:42 PM
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Quote:
Yes i was then and i still run E85 now
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My Half AN Injun..... |
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#12
09-04-2023, 09:38 PM
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Switched out the -10’s for -8’s today.
These are what came out. They were tapped at .022”
__________________
James 1970 Trans Am Spotts Built 484" IA2, Highports, EFI Northwind Terminator X sequential EFI fabrication and suspension by https://www.funkhouserracecars.com/ |
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