4.77 Sourcing?
#1
Rotary Poseur
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Join Date: Feb 2001
Location: Richmond, BC, Canada
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4.77 Sourcing?
Hiya,
Wondering if anyone knows where to get the 4.77 ring and pinion gear in NorthAm. The only places I see them now is via FEED, RE-Am, etc... Seems the 4.33 is widely accessible here (I'm running that now) but the other set is rare.
TIA.
Wondering if anyone knows where to get the 4.77 ring and pinion gear in NorthAm. The only places I see them now is via FEED, RE-Am, etc... Seems the 4.33 is widely accessible here (I'm running that now) but the other set is rare.
TIA.
#2
www.pettitracing.com has a 4.88 gear set
#3
Original Gangster/Rotary!
iTrader: (213)
Damn, I could have sworn chris and ari over at www.rx7.com had it available, but it's not listed on their webpage. I recommend giving them a call, I'll bet they can get it for you
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#8
Senior Member
iTrader: (1)
It sounds right. Excerpt from
http://www.autotrader.co.nz/View/Art...RX-8/2422.aspx
"...Mazda has lowered the final drive ratio to 4.77:1 which gives the RX-8 better bite off the line and out of second gear corners..."
Should be good news for SSM candidates budget...
- Sandro
http://www.autotrader.co.nz/View/Art...RX-8/2422.aspx
"...Mazda has lowered the final drive ratio to 4.77:1 which gives the RX-8 better bite off the line and out of second gear corners..."
Should be good news for SSM candidates budget...
- Sandro
#10
HamfistRacing.com
iTrader: (5)
Thanks autox gurus.
One more question... Dave at KDR said the 4.77 diff cannot take constant launch abuse (Drag / ProSolo) and that it is weaker than the 4.33. Dave said it is essentially a truck ring and pinion. If that is true, I am considering cryo treatment and shotpeening. Any thoughts on long term durability for ProSolo launchs? Dan?
BTW: Congrats on the SSM championship Dan!
One more question... Dave at KDR said the 4.77 diff cannot take constant launch abuse (Drag / ProSolo) and that it is weaker than the 4.33. Dave said it is essentially a truck ring and pinion. If that is true, I am considering cryo treatment and shotpeening. Any thoughts on long term durability for ProSolo launchs? Dan?
BTW: Congrats on the SSM championship Dan!
#11
Rotary Enthusiast
iTrader: (2)
Just saw a 4.77 set for sale in the 3rd gen classifieds might wanna check it out. heres the link
https://www.rx7club.com/3rd-generation-rx-7-1993-2002-parts-99/ca-down-pipe-flywheel-bmc-fuel-pump-misc-fd-parts-%245-%24750-864442/
https://www.rx7club.com/3rd-generation-rx-7-1993-2002-parts-99/ca-down-pipe-flywheel-bmc-fuel-pump-misc-fd-parts-%245-%24750-864442/
#16
Mr Sparkles
iTrader: (12)
Thanks autox gurus.
One more question... Dave at KDR said the 4.77 diff cannot take constant launch abuse (Drag / ProSolo) and that it is weaker than the 4.33. Dave said it is essentially a truck ring and pinion. If that is true, I am considering cryo treatment and shotpeening. Any thoughts on long term durability for ProSolo launchs? Dan?
BTW: Congrats on the SSM championship Dan!
One more question... Dave at KDR said the 4.77 diff cannot take constant launch abuse (Drag / ProSolo) and that it is weaker than the 4.33. Dave said it is essentially a truck ring and pinion. If that is true, I am considering cryo treatment and shotpeening. Any thoughts on long term durability for ProSolo launchs? Dan?
BTW: Congrats on the SSM championship Dan!
I actually think that the RX8 pinion might be stronger if they were made to spec for an RX8 differential. The after market ones that have been available up to this point required a spacer to be pressed onto the pinion because the shaft diameter is smaller than the bearing. This means the pinion shaft is thinner than it should be and could allow for flex under high torque. Not sure what power level you have to hit for it to be a problem as I don't think any of us (Andy, Erik and me) have hit it yet, but the potential is there.
I blew a rear-end in my Corvette because of something very similar, the people who built the diff before I bought it used a Dana 44 pinion with a spacer pressed on for the bearing to fit rather than a Dana 44 HD pinion.
Dan
#24
Sua Sponte
iTrader: (31)
Yes it is, but props to the s1mpsons for searching and continuing a thread on topic with new information opposed to starting a new one and filling the forum with a bunch of threads that makes it impossible to search.
I'm fairly certain I will be doing some rear end work this winter and may end up pulling the trigger on one of these. I think it'd be pretty good for the road course as well.
I'm fairly certain I will be doing some rear end work this winter and may end up pulling the trigger on one of these. I think it'd be pretty good for the road course as well.
#25
Searching for 10th's
iTrader: (11)
I'm fairly certain I will be doing some rear end work this winter and may end up pulling the trigger on one of these. I think it'd be pretty good for the road course as well.
I have a 4.44 RX-8 diff ready to be installed in my FD.
I'm still having trouble deciding between that or going with a 4.77.
The 4.77 would be better for autox, but I also like to do track days, and the 4.77 might be a little too much for track days.
Anyone here used 4.77 on the track in an FD?