Lemans Blue

I'm considering a vortec supercharger. I know centrifugal chargers deliver boost different than a roots, or screw chargers and deliver most boost at high RPM.

What I'm am wondering with a vortec do you get any boost at all below 2500 RPM? I really like low RPM throttle response but I dont want to put on an aftermarket hood to clear the supercharger.

Also I think eldelbrock makes a low profile screw type charger for the C6 that does not require a different hood, will it fit a C5 vette? And I think I just found my answer on the eldelbrock system , it looks like lingenfelter makes a kit for the eldelbrock system on a C5. Anyone have this set up yet? http://www.lingenfelter.com/product/...l#.WXT464jyuyI

So, the big question is,,, Do you get ANY low rpm boost with a centrifugal charger?? Can you feel the boost off the line or just cruising and tap the throttle , is there boost?

Thanks for any input. Also I have already read plenty about the subject, but I want some real world input from those who have centrifugal and screw type chargers.

Lemans Blue

Also in consideration of reliability and longevity, I dont want to go crazy with high RPM HP, but I was thinking that going with a smaller pulley and just spinning the charger faster might help in the low RPM range. I dont plan to spend a lot of time at 6000 + RPMs. I just want more usable, on demand, real world HP and Tq.

Any thoughts?

silver408z

If you like the low end you have now, it will only be better with any type of supercharger. The tuners can put more timing in the low rpm range to also help with low rpm power. Then also like you mentioned being aggressive on the pulley selection will help bring the boost in earlier and you can limit the power on top with a restrictor plate or pulling timing. There are plenty of options on making low end power even with a centi blower.

stevieturbo

A better question would be, does such a blower offer any torque increase at low rpm. Not boost. The two are not always the same.


And absolutely yes even if you dont see positive pressure on a gauge, the blower is still providing air to the engine. But if you're asking for a large increase in torque at low rpm, then no a centrifugal blower is not for you.

If you can get the likes of the Edelbrock to fit then yes it would be a far better choice for you.

Forcedvert

That link is for a kit "adapter" and if you read you will see you would still need an aftermarket hood to clear the sc. I wasn't sure from your post if you noticed that, so you might as well get one that doesn't require an adapter.

Darkvette98

the supercharger kit is 10-15k for the Edelbrock... plus buying the adapter and high rise hood....I personally would stick with a centrifugal for the power you're trying to make...or just go with heads and cam

stevieturbo

Or dont overlook the simplicity of cubes if it is largely low rpm torque you want.

If you're on a stock 5.7 for example...a jump to a 427 or even a 454 will give you a huge increase in low rpm torque.

Lemans Blue

Thanks all for the imput, I'm thinking a Vortech will get me what I want if tuned right. I guess there would not be any lag in power like a turbo. Now to decide what kit, A&A or ECS???

stevieturbo

If you want lots of extra torque below 2500rpm....then as already said, no it wont.

But correct, there will be no lag with any blower, ie great throttle response.

DOUG @ ECS

And a little better TQ with the ECS kit by design, Lemans feel free to give us a call to discuss.