carbon apex seals
09-03-03, 11:28 PM
#26
Originally posted by Jeff20B
Do they cost more than regular 1 piece seals?
Do they cost more than regular 1 piece seals?
09-23-03, 09:20 PM
#29
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Used carbon once and will never use again. Were not bad just no response in low end and poor gas milage. Kocked really bad once and blew two seals in rear rotor. Absolutely no damage to housings and rotor, it just turned into puff of dust. Running lean and detonation are two different conditions but I am not going to get into it, if you can not identify the difference then you should not be giving advice here. You can detonate this **** out of NA as I have. There are two kinds of sound when detonating, first the rattle which most are aware of, second the thunder usully on ported NA. It literally sounds like there is a pin ball hammer beating on the floor pan or you have a bolt sticking out on the fly wheel and rubbing the bell housing. How I found that out is something I wish none of you will go through. Until today that is the only motor I don't know why it detonated. The only thing I could think of is the MSDs or winter fuel. I blasted to the gas station and after fill up blasted again then cluank!. Ever since then I run factory 3 piece in my J bridge motor. Response is great and the motors see 9.5k rpm at least hourly.
09-23-03, 09:36 PM
#30
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Originally posted by peejay
Okay then.... how about a street ported engine running so lean an O2 sensor registeres 0.000 volts, full throttle for about 20 minutes at a time? (road course - after 20 minutes the tires would go off)
Had to turn the heater on full blast to keep the water temps below 220. But never detonated.
Or how about at the dragstrip where not only were the spark plugs chalk-white but the trailing plugs were eating the ground electrodes away after only 2 passes. This was before installing the O2 sensor, and obviously before installing an upgraded fuel pump to combat the problem...
Or how about limping 20 miles home with a badly clogged carburetor, engine running so lean it is misfiring and full throttle only was good enough for 35mph or so. No detonation, although I did burn all the gaskets out on the exhaust system
Okay then.... how about a street ported engine running so lean an O2 sensor registeres 0.000 volts, full throttle for about 20 minutes at a time? (road course - after 20 minutes the tires would go off)
Had to turn the heater on full blast to keep the water temps below 220. But never detonated.
Or how about at the dragstrip where not only were the spark plugs chalk-white but the trailing plugs were eating the ground electrodes away after only 2 passes. This was before installing the O2 sensor, and obviously before installing an upgraded fuel pump to combat the problem...
Or how about limping 20 miles home with a badly clogged carburetor, engine running so lean it is misfiring and full throttle only was good enough for 35mph or so. No detonation, although I did burn all the gaskets out on the exhaust system
09-25-03, 11:25 AM
#31
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Just describing the ends of the spectrum. I never, ever, ever once had a lean run detonation issue. Only got it to happen with timing.
Maybe our 87 octane fuel is better than yours?
I never, ever, ever once had a lean run detonation issue. Only got it to happen with timing.Maybe our 87 octane fuel is better than yours?
09-25-03, 06:04 PM
#32
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timing
Originally posted by peejay
Just describing the ends of the spectrum. I never, ever, ever once had a lean run detonation issue. Only got it to happen with timing.
Maybe our 87 octane fuel is better than yours?
Just describing the ends of the spectrum.
I never, ever, ever once had a lean run detonation issue. Only got it to happen with timing.Maybe our 87 octane fuel is better than yours?
10-05-03, 01:34 AM
#33
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Originally posted by peejay
Except ceramics like to break too, and when they go you are guaranteed that the shrapnel will destroy everything in its path (including your skin if you touch the broken bits ) Ceramics just don't wear so fast.
Except ceramics like to break too, and when they go you are guaranteed that the shrapnel will destroy everything in its path (including your skin if you touch the broken bits
) Ceramics just don't wear so fast.
12-18-18, 07:57 PM
#35
Old [Sch|F]ool
Run 2mm apex seal rotors and decent iron seals. Prioperly clearanced 2mm iron seals can handle RPM no problem. 2mm rotors are better anyway, they have 12 rotor gear pins which makes life easier on the stationary gears.
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