3mm Rotors
03-12-2005, 04:57 PM
#2
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Join Date: Jun 2004
Posts: 524
Originally Posted by cjr' date='Mar 12 2005, 02:31 PM
Where can I buy some rotors that have already been milled out for 3mm tips.??? 
Reason being cheaper and quicker to by whole rotor than ship out and back again!
Buy rotors for a '74-85 engine. Depending on what engine you are putting them in, they will either be a little heavier or a lot heavier. Will need to also get the proper counterweights, front and rear, to match.
Probably cheaper and easier to just buy new rotors for your year engine, assuming the reason you want 3mm seals is to get some more life out of worn rotors.
03-12-2005, 06:02 PM
#5
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Join Date: Jun 2004
Posts: 524
Originally Posted by cjr' date='Mar 12 2005, 03:26 PM
Hve you seen how much these rotors are new. Then compare that to the RX8 rotors approx $200 difference
And 3mm seal rotors are about 30% more than RX-8 rotors instead of nearly double. But then you have to buy new counterweights to match the rotors and it works out to about the same bother as buying new rotors for your current setup.
RX-8 rotors are an anomaly, since they are in current production. They don't have to worry about the issues with keeping a stock of them because they can just be pulled from, or sent to, engine production.
03-23-2005, 09:01 PM
#7
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Join Date: Jun 2004
Posts: 524
[quote name='cjr' date='Mar 23 2005, 04:14 PM']So I buy new rotors. Get them machined approx cost per rotor £750 .rx8 rotor and tips and all approx cost £500. Hmmmm maths lesson again I think
[/quote]
You don't need to machine new rotors. Since the seal grooves won't be sloppy worn out, you may use 2mm seals with no problems.
3mm seals just for the sake of having 3mm seals is not a very good idea. The larger seals require more oiling, offer poorer sealing, cost a ton more, are harder on rotor housings, and generally suck. Detonation will break any seal, 2mm or 3mm, so there is a very slim gain for a great lot of disadvantage when going to 3mm seals. They're best left as last resorts to save old rotors, or for older rotors that take 3mm seals anyway.
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You don't need to machine new rotors. Since the seal grooves won't be sloppy worn out, you may use 2mm seals with no problems.
3mm seals just for the sake of having 3mm seals is not a very good idea. The larger seals require more oiling, offer poorer sealing, cost a ton more, are harder on rotor housings, and generally suck. Detonation will break any seal, 2mm or 3mm, so there is a very slim gain for a great lot of disadvantage when going to 3mm seals. They're best left as last resorts to save old rotors, or for older rotors that take 3mm seals anyway.
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