Thick walled engine blocks

[Sprint36]

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Anyone know any more?<br>
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David

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[KWM338R]

change gear in that car, there doesn't appear to be gearstick?<br>
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Cheers<br>
Mark

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[davepoth]

I'm pretty sure the homologation rules state that the engine block must be standard. I couldn't find the '74 group 1 rules on the net anywhere though.

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[Stephen Grellet]

I have never heard of a thickwall block as bore wear or weakness etc does not seem to be a problem. What they did make was a chromium iron block which was much stronger, and helped prevent cracks around the main bearing webs. Scott what did they find with your engine re the bearings?<br>
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Regds Stephen

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[Carsreunited]

Still a mystery to be honest. A mixture of surge or the intelligent money is on the lack of crank damper. I wasn't using more than 7500rpm but I've heard from someone in the know that 7200rpm is critical on an undamped crank.<br>
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I got through the last race with no problem and that was with a new winged sump but then I didn't exceed 6800rpm.<br>
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Scott

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