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#1
01-23-2022, 06:24 PM
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spark plugs for KRE 85 cc d-ports
For you guys running the KRE 85 cc heads, what plugs are you using?
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69 Bird w/1970 400 block(409 cubes), #64 heads, hyd. roller, Q-jet by Jeff E., original interior, ps, pdb, th350, and 3.73 gears. Pump gas, street driven muscle. 3800 lbs. race weight. Best, 11.39 @118, my son's car. 79 T/A w/463, Scat crank, Eagle rods, Icon pistons, Lunati solid roller, 262/270, KRE 325 heads, Northwind intake, QF950 carb, full interior, ps, pdb, th350, and 3.73 gears. Pump gas, 3650 lbs. race weight. 10.68 @ 126 so far... no tuning yet. |
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#2
01-23-2022, 06:41 PM
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I use NGK FR-5's
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62' Lemans, Nostalgia Super Stock, 541 CI, IA2 block, billet 4.5" crank, Ross, Wide port Edelbrocks, Gustram intake, 2 4150 style BLP carbs, 2.10 Turbo 400, 9" w/4:30 gears, 8.76 @153, 3100lbs |
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#3
01-23-2022, 08:33 PM
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Thanks Gary, I thought that was the plug that Jeff Kaufmann had recommended but I wanted to make sure.
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69 Bird w/1970 400 block(409 cubes), #64 heads, hyd. roller, Q-jet by Jeff E., original interior, ps, pdb, th350, and 3.73 gears. Pump gas, street driven muscle. 3800 lbs. race weight. Best, 11.39 @118, my son's car. 79 T/A w/463, Scat crank, Eagle rods, Icon pistons, Lunati solid roller, 262/270, KRE 325 heads, Northwind intake, QF950 carb, full interior, ps, pdb, th350, and 3.73 gears. Pump gas, 3650 lbs. race weight. 10.68 @ 126 so far... no tuning yet. |
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#4
01-24-2022, 07:20 AM
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The proper plug choice hinges on how much HP / heat the engine will make , not on chamber size or even compression.
Gary’s motor and his recommendation for a plug may well be too cold for your motor as he is likely making a bunch more HP then you are! Plugs have a 600 degree operating range . If you had the ideal heat range in regards to your motors HP capability’s then your combustion temps could be 300 degrees hotter or colder and your plugs will still work fine, as in not over heating , nor fouling out on you. Note that a 300 degree combustion temperature change will take place starting with about a 150 overall HP difference between two motors in question. One size does not fit all, and that’s why there are so many different nose plugs and heat ranges.
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Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs! And he was not talking about 1/8 or 1/4 mile ETs! 1) 1940s 100% silver 4 cup tea server set. Two dry rotted 14 x 10 Micky Thompson slicks. 1) un-mailed in gift coupon from a 1972 box of corn flakes. Two pairs of brown leather flip flops, never seen more then 2 mph. Education is what your left with once you forget things! Last edited by steve25; 01-24-2022 at 07:32 AM. |
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#5
01-24-2022, 08:55 AM
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Just to be clear, when I said I use FR-5's on KRE D port heads, I was referring to street or street/strip engines I build for customers. I use NGK 5671-7 plugs in my race car which has Edelbrock wide port heads on it. The FR-5 plug is generally a good street plug for the KRE D ports.
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62' Lemans, Nostalgia Super Stock, 541 CI, IA2 block, billet 4.5" crank, Ross, Wide port Edelbrocks, Gustram intake, 2 4150 style BLP carbs, 2.10 Turbo 400, 9" w/4:30 gears, 8.76 @153, 3100lbs |
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#6
01-24-2022, 08:59 AM
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That is why I said Jeff had recommended this particular plug because he knew the particulars of my engine build. I know that one size doesn't fit all.
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69 Bird w/1970 400 block(409 cubes), #64 heads, hyd. roller, Q-jet by Jeff E., original interior, ps, pdb, th350, and 3.73 gears. Pump gas, street driven muscle. 3800 lbs. race weight. Best, 11.39 @118, my son's car. 79 T/A w/463, Scat crank, Eagle rods, Icon pistons, Lunati solid roller, 262/270, KRE 325 heads, Northwind intake, QF950 carb, full interior, ps, pdb, th350, and 3.73 gears. Pump gas, 3650 lbs. race weight. 10.68 @ 126 so far... no tuning yet. |
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#7
01-24-2022, 09:14 AM
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Cool! So your golden!
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Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs! And he was not talking about 1/8 or 1/4 mile ETs! 1) 1940s 100% silver 4 cup tea server set. Two dry rotted 14 x 10 Micky Thompson slicks. 1) un-mailed in gift coupon from a 1972 box of corn flakes. Two pairs of brown leather flip flops, never seen more then 2 mph. Education is what your left with once you forget things! |
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#8
01-25-2022, 11:03 AM
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Quote:
Glenn |
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#9
01-25-2022, 01:05 PM
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When I originally added the KRE 85 from SD Performance I used Autolite 3924 no problems. Since then I switched over to the Sniper EFI and now use NGK 2756 no problems.
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