Project FD: Took way too long

[bubba]

Chance91;292980 wrote:
At least its "easier" to rebuild than a piston motor. Less moving parts to deal with.. anyway.

i heard they are easy to rebuild, but really easy to not rebuild properly

[Chance91]

zbrown;292987 wrote:
LOL says the guy that has never had one apart..... Mr rotary man, you were talking about 3mm apex seals.... why or for what reason did they come about??

I like rotaries, i just got tired of the nervous feeling I got in my stomach every time in boost

Fair point... although, I have had a few apart, just never put one back together. We had a pair in the shop when I was in CT.

The 3mm apex seals from the earlier motors can be used in the 13b from what I recall, you machine out the 2mm grove to accept the larger ones. I believe the idea is more sealing surface area and they are a tiny bit stronger. I had been told this by some of the guys on the rotary forums, so it could be way off base.

[zbrown]

Chance91;293014 wrote:
The 3mm apex seals from the earlier motors can be used in the 13b from what I recall, you machine out the 2mm grove to accept the larger ones. I believe the idea is more sealing surface area and they are a tiny bit stronger. I had been told this by some of the guys on the rotary forums, so it could be way off base.

I just have to give you a hard time because it is a pet peeve of mine when people talk about 3mm seals like they are something special (I thought that is what you were getting at with the question)

They came to be popular because it allows you to machine and utilize otherwise unusable rotors that have damaged/pinched seal grooves (which is common)

They wear your rotor housings ($$$) like no other, aswell as chatter much easier. Plus there are only a few shops that have the equipment and know how to properly machine the rotor....... most even from some big names will not have the groove centered correctly.

And about calling them stronger..... any detonation that is going to break a 2mm seal is going to puke a 3mm seal just the same

K i ranted a bit

[Chance91]

zbrown;293016 wrote:
K i ranted a bit

Always good to get the facts straight.
I think Racing beat does that sort of work, I know they offer a balancing service for something like 800/set...
I suppose you've got a point, if you detonate hard enough to blow your seals, doesn't matter how thick they are.

Probably a good idea to get someone who knows what they're doing when tuning to do that, and I suppose running meth on top of your tune would be good back-up, without depending on it in the tune.

Just sort of 'in theory' not directed at the project in this thread... I should stop the derailment about now I think.

[fdfreak]

no, your good. this is where people learn. If you get opinions from people who have already been there, there is no wasted money in learning from other peoples mistake or success. There are alot of different opinions on rx7club. but you have to consider the people giving these opinions and the expertise that they actually have. I know i have wasted a lot of money by taking peoples advise who sounded like they knew what they were talking about.