Quote:
Originally Posted by redefined
Thanks for the response.
However, I'm not sure about your 'lag' description. Superchargers are far more linear than a turbo is, am I missing something here? Is it the that style supercharger, a Procharger that's not as linear?
I've own supercharged and turbocharged vehicles, mostly BMW's and the supercharger on that one was far more linear and constant than the turbo. On a road course you better know exactly when that turbo will spool or you'll be going sideways.
Correct me where I'm wrong! Thanks!
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Yes, it's because it's a Pro-Charger. They need RPMs to build boost just liek a turbo typically does. A Whipple, Magnacharger/Harrop/Eaton, and Kenny Bell blower won't act like that typically(the wrong cam or too big of a blower can cause some lag though). They are known as positive displacement blowers. They are listed in a volumetric size because that's the equivalent "displacement" they add to a motor. Basically, they make the motor act as if it's bigger than it really is from the throttle response to how much power they end up making. However, a Pro-Charger makes great power and is an excellent supercharger. It's just not making power where or how it needs to be made in order to make a good pt style car. That's my point, be careful where and how you make your power when reaching for that 700whp goal. That's why I think you'll need to plan your build from the get go if 700 is the goal. Last thing you'll want is a 700whp motor that is no fun to drive the way you want or intend to drive.
500-600 is much easier to build in stages starting with NA because it's fairly easy to reach those numbers reliably with low boost levels. 700 at the wheels puts you at about 850 flywheel. Going from NA to that level boosted reliably is not so easy due to the increase in boost needed among other things. This is of course my opinion. I'd highly recommend you work with a builder before you do anything if seriously reaching for the 700whp mark. I'd also recommend you focus more on how you want the engine to respond and where the power is made than simply shooting for a number if enjoying the drive is the main goal.
A car for you to check out that may be of interest is one built by member RS302 or something like that. He started with a 1st gen that was Ford 302 powered. Once he blew that motor, he went to an LSx with twins. The throttle response is unreal on that car. I love it. He makes great power and runs it on 87 octane. It's a neat build.