Renesis Rotors
Senior Member
Joined: Jan 2002
Posts: 1,345
From: CT
Originally Posted by Drago86' date='Nov 25 2003, 07:34 PM
Mazdatrix allready tried the Renn seals in a PP exhaust motor with no problems last i heard,.. think about it, the third piece on old apex seals was far thinner then the renn's are,..
it seems that their motor has failed with the renesis seals on the PP housing?
Senior Member
Joined: Nov 2002
Posts: 292
From: Central KY
Originally Posted by Robbomaz' date='Nov 23 2003, 05:45 AM
To recap, a couple of months back we built a PP 13B with Renesis rotors for a Gen 1 S1 race car. Motor was specced & ported the same as the old one, with the rotors being the only real internal difference
All were interested in what difference the hi-comp rotors would make.
Well this motor has done 3 meets now with no issues other than a leaking oil cooler line. Car has dynoed (on the same dyno) at 24 hp more @ 8500 than the old engine when it was fresh. Mid-range torque is better, & driver reports much better punch out of corners.
So yes, using Renesis rotors gives an improvement. Not enough IMHO to pull apart a good motor to fit them (unless every last bit counts & the cost doesn't) The renesis rotors are the same price as the older types here, so 24rwhp for the cost of milling ther seal grooves makes it a must have at rebuild time for an NA!
Maybe even a turbo..........
All were interested in what difference the hi-comp rotors would make.
Well this motor has done 3 meets now with no issues other than a leaking oil cooler line. Car has dynoed (on the same dyno) at 24 hp more @ 8500 than the old engine when it was fresh. Mid-range torque is better, & driver reports much better punch out of corners.
So yes, using Renesis rotors gives an improvement. Not enough IMHO to pull apart a good motor to fit them (unless every last bit counts & the cost doesn't) The renesis rotors are the same price as the older types here, so 24rwhp for the cost of milling ther seal grooves makes it a must have at rebuild time for an NA!
Maybe even a turbo..........
Can you talk about what generation seals and springs you used? FD corner seals and springs? FC apex seals and springs?
Did you use the FE's extra blow-by/gas side seal?
Sorry for all the questions but 10:1 CR and lighter rotors! This is exciting stuff
thanx
Senior Member
Joined: Jan 2002
Posts: 1,345
From: CT
i was calculating yesturday that if you are not able to use any other seals other then the apex seals on the new rotors and u have to buy rx8 seals it iwll run you 800 for everythign but the apexes. if everything fits then its great and all u have to do is mill the rotor.
what counterweights and flywheel did u use?
which old seals did u use?
what rpm are u revvign this motor to?
do u have a dyno graph u can post here?
is everyhting that u but the rotors from the old motor?
if its easier can u just tell us what exctly it is that u did ?
sorry for allteh quastions
what counterweights and flywheel did u use?
which old seals did u use?
what rpm are u revvign this motor to?
do u have a dyno graph u can post here?
is everyhting that u but the rotors from the old motor?
if its easier can u just tell us what exctly it is that u did ?
sorry for allteh quastions
Senior Member
Joined: May 2003
Posts: 236
From: Dallas/ Ft Worth
Originally Posted by kahren' date='Dec 17 2003, 12:30 PM
i was calculating yesturday that if you are not able to use any other seals other then the apex seals on the new rotors and u have to buy rx8 seals it iwll run you 800 for everythign but the apexes. if everything fits then its great and all u have to do is mill the rotor.
what counterweights and flywheel did u use?
which old seals did u use?
what rpm are u revvign this motor to?
do u have a dyno graph u can post here?
is everyhting that u but the rotors from the old motor?
if its easier can u just tell us what exctly it is that u did ?
sorry for allteh quastions
what counterweights and flywheel did u use?
which old seals did u use?
what rpm are u revvign this motor to?
do u have a dyno graph u can post here?
is everyhting that u but the rotors from the old motor?
if its easier can u just tell us what exctly it is that u did ?
sorry for allteh quastions
Senior Member
Joined: Oct 2001
Posts: 10,906
From: Peoria, AZ
Originally Posted by TheAntiChrice' date='Dec 26 2003, 01:16 PM
Exactly the ?'s I wanted to know and also why the hell it matters if the CR is higher with boost.. I mean yes I realize high CR + boost = BANG but don't rotaries blow up on one ping or knock? So why would it matter?
Senior Member
Joined: Oct 2003
Posts: 1,420
From: Boston Ma.
Usually the people who run high C/R + boost run alchohol. Or water injection with a 50/50 mix of alchohol. I wouldnt say the rotary will blow on first ping, but the high C/R would deffinately deminish the "safety net". Sometimes a ping is inevitable while tuning, and i would rather not risk my invesment.
Senior Member
Joined: Nov 2003
Posts: 480
Originally Posted by TheAntiChrice' date='Dec 26 2003, 10:16 AM
Exactly the ?'s I wanted to know and also why the hell it matters if the CR is higher with boost.. I mean yes I realize high CR + boost = BANG but don't rotaries blow up on one ping or knock? So why would it matter?
but don't rotaries blow up on one ping or knock? So why would it matter?
No, they don't. I've had mine ping HARD like a dozen times without blowing up.
It sounded like a chisel getting thrown at a brick wall. Again, it did NOT blow up.
