Originally Posted by TheRadioFlyer

After a long time of consideration, saving and research, I've decided to put some real power under the hood. My 97 LS1 is the weakest LS motor installed on any corvette. A complete exhaust, intake, 1.8 rockers and tune yielded a semi-healthy 328HP at the wheels, but i think i can do better.

I didn't want to do anything drastic to the motor for fear that i'd blow up my aging transmission, but earlier this year my trans died anyway and Frank's Vettes rebuilt it with heavy duty parts and a shift kit. Now that the drive train is all heavy duty (i have the 3.15 gear option from the factory) I can finally focus on the motor.

The parts list:
- 243 heads w/ valve covers and coil mounts
- Custom SDPC cam: 221/226 .565/.560 114
- powerbond (new generation) under drive pulley
- new pushrods
- new lifters
- new oil pump
- new timing set
- new valve springs
- new misc gaskets/seals

The Plan is to get rid of my engine's "asthma" The cam profile is designed for maximum torque towards the bottom end. My 1.8 rockers will carry over to the 243 heads. I'm hoping this plus a re-tune (street not dyno) will give my that low end SOPT rating I've been after. Frank's Vettes will be doing the install. SPDC will be supplying the parts

Stay tuned for engine **** and install updates.

Originally Posted by Bluefire

My personal opinion is if you do not have FI, stay away from the 25% pulley. With my 10% pulley sometimes at idle the voltage will fluctuate between 13.3V - 14.2V. As soon as you touch the "go" pedal it will be rock solid at 14.2V.

Good Luck.

Originally Posted by TheRadioFlyer

Normally I'd agree, but I have an aftermarket alternator that already has a smaller-than-stock clutch pulley. I idle at 13.5-13.8 all day long at night with everything blaring and all the lights on.