We’ve got the answers—Mondays when the Summit Racing tech department tackles your automotive-related conundrums. This week, we’re talking compression ratio and LT1 power.
From: John Oltman, Jr. • Metamora, IL
Q: I’m rebuilding a 327 to drop into my 1948 Jeep CJ2A. I’ve bored the engine .030 inches over and equipped it with 180cc Airflow Research heads, flat top pistons, a Lunati Voodoo cam and lifters, a Weiand Stealth intake, a Holley 600 cfm carb, and an MSD Ready-to-Run distributor. Can you tell me what the compression ratio would be?
A: There are some handy tools out there to help you with tricky calculations such as compression ratio. Summit Racing, for example, offers a variety of helpful automotive calculators and tools, including:
- CFM Calculator: Select the perfect size carburetor for the street or strip
- Compression Calculator: Find your total displacement and optimal compression
- Gear Ratio Calculator: Put the power to the pavement with the proper ring-and-pinion
- Stroker Combinations: Get the perfect combo of parts for your stroker build
- Transmission Lookup: Find your transmission’s gear ratios in no time flat
To find your engine’s compression, click the Compression Calculator link above, fill in your engine specs, and click calculate—it’s that easy! Be sure to have the relevent info on hand (bore, stroke, cylinder head volume, etc.) for even quicker calculations. If you run into any snags, Summit Racing’s tech staff can help you get the final answer you need.
From: John Patrick • Taylor, MI
Q: I have a 1997 Camaro SS with an LT1 engine. What is the easiest way to gain horsepower without totally tearing the engine apart? Also, will 17 x 11 wheels fit into my rear wheel wells or would I have to modify them to fit?
A: For a solid foundation of power, we recommend a cold air intake and a performance programmer. Both are easy to install and create big performance gains. As for the cold air intake, your best bet would be the K&N Generation II FIPK (KNN-57-3010-1). It has an advanced free-flowing design that dramatically reduces air intake restriction for up to a 10 percent increase in horsepower. Then for the performance programmer, you can install the Hypertech Power Programmer III (HYP-30027). Just plug it into your OBD port for noticeable increases in horsepower and torque throughout your entire powerband. Combined, the intake and programmer will transform your Camaro into a serious street machine!
Regarding the wheels, it would take a lot of modifications to make those 17 x 11 rims work. Your Camaro can accommodate up to 9 ½-inch wide wheels with 7-inch backspacing.