My last engine ran for years with zero issues until the Rollmaster timing chain decided to go away. It had about 5 seasons of racing on it at that point, and started to slow down. I figured it was just getting tired, as I drove it nearly every day on the street back then. Turns out the Rollmaster chain had stretched so much I could almost touch the rollers together between the sprockets!
I went ahead and replaced the chain, rolled in some rod bearings, and new gaskets. That engine was sold soon after. It made 514hp/587tq and had pushed my car to 11.50's at the track.
The new engine doesn't have a lot of time on it, and I didn't dyno it. Probably around 550-580hp and 600ft lbs torque. It easily pushes my car to low 11's in full street trim, and runs like stock 400 2bbl engine for "normal" driving.
I doubt if I put 500 street miles a year on it these days, and no more than 100 track runs. At that rate it will last just about forever. More than likely I'll build a replacement engine and sell it WAY before it's worn out!.....Cliff
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https://cliffshighperformance.com/
73 Ventura, SOLD 455, 3740lbs, 11.30's at 120mph, 1977 Pontiac Q-jet, HO intake, HEI, 10" converter, 3.42 gears, DOT's, 7.20's at 96mph and still WAY under the roll bar rule. Best ET to date 7.18 at 97MPH (1/8th mile),
Last edited by Cliff R; 06-25-2010 at 06:12 AM.
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