I have a '64 D100 with a 3 on the tree 225 /6. The head has been milled .100", ported & polished, new guides, hardened seats, and the engine has the Super six carb, intake and exhaust. What is the recommended redline rpm for this engine? Also, what's a safe cruising rpm for highway driving (long trips)?
Thanks

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Stephan Nelle

Redline and where it gives up are about the same, about 4000 with a one barrel.

Nice place for cruise is about 2500 to 2700 rpm, right in the middle of the torque band.

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Aggressive Ted

http://cid-32f1e50ddb40a03c.photos.live ... %20Swinger


74 Swinger, 9.5 comp 254/.435 lift cam, 904, ram air, electric fans, 2.5" HP2 & FM70 ex, 1920 Holley#56jet, 2.76 8 3/4 Sure-Grip, 26" tires, 25+MPG

Cruise rpm will depend on carb size, tire size, rear ratio...

2500-2700 for a 1 barrel
can get as low as 2300 with more carb, gearing, etc...



Redline on a 'worked over engine' is about 5-6K... stock bottom end with old bearings should be about 3500-4000 (don't say I warned ya...)

-D.Idiot

redline?
this is redline
unfortunately the poor ole slant has a bad habit of poking # 5 out.
without a good build,if you are looking for max revs,that will probably happen.
seen several over the years. keep it under 4k and (hopefully) you should be sweet.

regards,Rod

4000 rpm is about where the power starts to really drop off. I have cruised a well rebuilt stock-internals engine at 36-3800 all the way across the country with no ill effects.

I would say 5000 is totally safe for stock internals if the engine isn't gummed up inside. I was running my V motor (junkyard shortblock) to 5500 road racing and that was 100% fine. BUT, when I went to 6000 redline it gave up.

My '64 Dart motor has a well rebuilt stock-type bottom end with cast pistons and balanced assy and looser bearing clearances and it is good to 6000.

Lou

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