why not 2.5mm seals?
01-13-05, 12:44 AM
#6
Super Snuggles
Originally Posted by silversev
then why do people run 3mm?
There's no real reason to run 3mm seals because 2mm seals are fine with proper tuning. The expense of having FD rotors machined for 3mm seals is a waste of money in my opinion.
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01-13-05, 01:04 AM
#8
3mm seals are a older Mazda design. They changed to the 2mm for the 86 and later cars.
The reason some shops install 3mm seals in 2mm rotors is due to the fact that the 2mm grooves are beyond tolerances, either machine them out for 3mm seals or throw them away.
Remember the old school drag racer running 9s in his FD, Adam Sawartari? IIRC he ran 2mm seals.
The reason some shops install 3mm seals in 2mm rotors is due to the fact that the 2mm grooves are beyond tolerances, either machine them out for 3mm seals or throw them away.
Remember the old school drag racer running 9s in his FD, Adam Sawartari? IIRC he ran 2mm seals.
01-13-05, 01:09 AM
#10
Super Snuggles
Originally Posted by silversev
do you know any reputable tuners,RE builders ect. in our area?
01-13-05, 01:13 AM
#11
bonch bite
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Yeah I've heard about Hayes. Ive heard 50/50 about atkins and that pineapple only has good race engines. I'll probably end up going with atkins cause its so close. thanks for the info.
01-13-05, 01:23 AM
#12
Super Snuggles
Originally Posted by silversev
Yeah I've heard about Hayes. Ive heard 50/50 about atkins and that pineapple only has good race engines. I'll probably end up going with atkins cause its so close. thanks for the info.
01-13-05, 01:27 AM
#13
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Originally Posted by jimlab
The same reason people ask about 6-speed transmissions when their 5-speed works just fine...
There's no real reason to run 3mm seals because 2mm seals are fine with proper tuning. The expense of having FD rotors machined for 3mm seals is a waste of money in my opinion.
There's no real reason to run 3mm seals because 2mm seals are fine with proper tuning. The expense of having FD rotors machined for 3mm seals is a waste of money in my opinion.
01-13-05, 01:54 AM
#16
Super Snuggles
Originally Posted by silversev
what about someone who can reliably tune a power fc by dyno locally
01-13-05, 12:44 PM
#19
Originally Posted by GOOFYROTOR
3mm & 2mm Apex seals will break at about the same rate even if it's tune "correctly". due to detonation or other obstacles.
01-13-05, 01:04 PM
#20
Super Snuggles
Originally Posted by 13btnos
3mm will hold up better to detonation
use 3mm to cover yourself as an added safety measure.
01-13-05, 01:43 PM
#21
Originally Posted by jimlab
No, they won't.
Do you really think that an additional 1mm (0.039") of thickness makes any difference? Detonation will destroy 3mm seals just as easily as 2mm seals.
Do you really think that an additional 1mm (0.039") of thickness makes any difference? Detonation will destroy 3mm seals just as easily as 2mm seals.
01-13-05, 02:35 PM
#22
Originally Posted by jimlab
No, they won't.
Do you really think that an additional 1mm (0.039") of thickness makes any difference? Detonation will destroy 3mm seals just as easily as 2mm seals.
Do you really think that an additional 1mm (0.039") of thickness makes any difference? Detonation will destroy 3mm seals just as easily as 2mm seals.
01-13-05, 02:51 PM
#23
Super Snuggles
Originally Posted by 13btnos
That's funny coming from a person who doesn't even have a rotary in their RX7.
And I do have experience with both 3mm & 2mm apex seals detonating. A really harsh detonation at say 28psi boost will destroy any apex seal.
Any seal might hold up to a few pings, or it might not. Detonation will wipe out a 3mm seal just as readily as a 2mm seal, and even a 6mm seal (yes, rotary tuners have tried just about everything) isn't proof against detonation.
The 3mm will hold up slightly better to minor detonations/misfires than 2mm but like I said before the only cure is to not detonate.
01-13-05, 05:48 PM
#25
Originally Posted by jimlab
What exactly does that have to do with the current discussion? If I recall correctly, it did come with one originally.
Detonation is an uncontrolled burn resulting in vastly increased combustion chamber pressures. Detonation is, by definition, "harsh".
Any seal might hold up to a few pings, or it might not. Detonation will wipe out a 3mm seal just as readily as a 2mm seal, and even a 6mm seal (yes, rotary tuners have tried just about everything) isn't proof against detonation.
Well, at least you got that right.
Detonation is an uncontrolled burn resulting in vastly increased combustion chamber pressures. Detonation is, by definition, "harsh".
Any seal might hold up to a few pings, or it might not. Detonation will wipe out a 3mm seal just as readily as a 2mm seal, and even a 6mm seal (yes, rotary tuners have tried just about everything) isn't proof against detonation.
Well, at least you got that right.