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TR2/3/3A Changing rear seal
- Thread starter Redoakboo
- Start date
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The Mad Marx part is from the designer of the seal, German racer Christian Marx of Germany, who came up with the design to fix a leak in his very quick TR4. He is now racing an even quicker TR8.
https://www.tr4-racing.de/eng/madmarx-racing.html
Tom
TR3driver
Great Pumpkin - R.I.P
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True, but he (Chris "Mad" Marx) made an agreement with Joe A. (another TR4 racer) to be the exclusive distributor for the USA. Joe in turn sells to TRF, BPNW and anyone else who offers. (He also sells direct through ARE.)
IMHO the Mad Marx (aka Viton) seal is the best. However, the stock seal can be made to work reasonably well on engines with an open crankcase with the modified mandrel dimensions. I don't think it will ever work well without the road draft tube, unless some other ventilation arrangement is made (better than the factory "PCV" systems). Joe actually runs a crankcase evacuation system that I suspect would make any seal work well.
Worth noting, perhaps, that while occasional "marking" is pretty standard for a street TR; many racing authorities take a very dim view of having their tracks marked and are apt to order you off.
FWIW, here's a shot of Joe's TR4
And his "even faster" car which, believe it or not, still has a TR4 engine tucked in there (someplace!)
IMHO the Mad Marx (aka Viton) seal is the best. However, the stock seal can be made to work reasonably well on engines with an open crankcase with the modified mandrel dimensions. I don't think it will ever work well without the road draft tube, unless some other ventilation arrangement is made (better than the factory "PCV" systems). Joe actually runs a crankcase evacuation system that I suspect would make any seal work well.
Worth noting, perhaps, that while occasional "marking" is pretty standard for a street TR; many racing authorities take a very dim view of having their tracks marked and are apt to order you off.
FWIW, here's a shot of Joe's TR4
And his "even faster" car which, believe it or not, still has a TR4 engine tucked in there (someplace!)
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Yup, just thought Chris deserved some credit. TomTrue, but he (Chris "Mad" Marx) made an agreement with Joe A. (another TR4 racer) to be the exclusive distributor for the USA. Joe in turn sells to TRF, BPNW and anyone else who offers. (He also sells direct through ARE.)
IMHO the Mad Marx (aka Viton) seal is the best. However, the stock seal can be made to work reasonably well on engines with an open crankcase with the modified mandrel dimensions. I don't think it will ever work well without the road draft tube, unless some other ventilation arrangement is made (better than the factory "PCV" systems). Joe actually runs a crankcase evacuation system that I suspect would make any seal work well.
Worth noting, perhaps, that while occasional "marking" is pretty standard for a street TR; many racing authorities take a very dim view of having their tracks marked and are apt to order you off.
FWIW, here's a shot of Joe's TR4
And his "even faster" car which, believe it or not, still has a TR4 engine tucked in there (someplace!)