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Reverse split cam with a supercharger ?

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Old 01-11-2015, 03:49 AM
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Default Reverse split cam with a supercharger ?

I've used this cam on a couple turbo builds and I was wondering if I could use it with a supercharger.
It's already installed in my shortblock and I dont really want to buy another cam.
I know most people don't like reverse split cams but Id like some opinions on this cam with a blower.
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Old 01-11-2015, 08:32 AM
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Here's the thing with forced induction, and I'm not a cam expert, but the key to making power is getting as much air into and out of the cylinder. The blower/turbo helps get it in, but there is nothing but the piston to push it out, so you need as much help as possible getting spent gasses out of the chamber.

Chances are, you're going to see less horsepower, but more boost pressure with that cam. Say you are making 15psi, you might only see 575rwhp. Put in a blower friendly cam, and your boost pressure might drop to 11-12psi, but power would increase to 650 (just random numbers here).

I'd rather make more hp with less boost, than the opposite. If I could make 1000rwhp on 10psi, I'd chose that all day long vs. 1000hp at 30psi of boost.

So in the end, a cam events are even more critical in a forced induction setup, especially considering the flow characteristics of the cylinder heads.
Old 01-11-2015, 09:06 AM
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Originally Posted by The Alchemist
Here's the thing with forced induction, and I'm not a cam expert, but the key to making power is getting as much air into and out of the cylinder. The blower/turbo helps get it in, but there is nothing but the piston to push it out, so you need as much help as possible getting spent gasses out of the chamber.

Chances are, you're going to see less horsepower, but more boost pressure with that cam. Say you are making 15psi, you might only see 575rwhp. Put in a blower friendly cam, and your boost pressure might drop to 11-12psi, but power would increase to 650 (just random numbers here).

I'd rather make more hp with less boost, than the opposite. If I could make 1000rwhp on 10psi, I'd chose that all day long vs. 1000hp at 30psi of boost.

So in the end, a cam events are even more critical in a forced induction setup, especially considering the flow characteristics of the cylinder heads.
"EXACTLY "
If your going through the trouble of installing FI you may as well not leave all that on the table. Relatively speaking a Cam swap isn't too intrusive when you consider all the other supporting mods that we go through.
My. $0.02
Old 01-11-2015, 09:18 AM
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I made 600whp with this cam on my stock 4.8 on 10lbs. I know it can make some power.
Old 01-11-2015, 11:14 AM
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Originally Posted by fastcars95
I made 600whp with this cam on my stock 4.8 on 10lbs. I know it can make some power.
Ok, then why bother asking?
Old 01-11-2015, 11:16 AM
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I was asking because that was with a turbocharger. The cam was designed as a turbo cam. I'm not sure if it will perform with a my new setup. Novi 2200
Old 01-11-2015, 12:06 PM
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Generally speaking the idea behind a turbo cam is to prevent exhaust gas from re-entering the cylinder since it is under significant pressure due to the turbo. As such the exhaust tends to close earlier with turbo cams.

With a blower you have a far more open flowing exhaust with significantly less back pressure so the blower cams leave the exhaust open longer and take advantage of the fact that the intake air in pressurized to help push exhaust out. So there is more overlap than a turbo cam.

Will your cam work? Yes. The engine will run and make more power than without a blower. Will your engine make more power with a blower cam? Probably significantly more.

Beyond these general rules I'm not qualified to speak. Maybe the cam gurus will come add detail.
Old 01-11-2015, 07:05 PM
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Can anyone recommend a good blower cam.
6.0l iron short
Patroit stage 3 heads
Novi 2200.
Looking to make 700-750whp
Old 01-11-2015, 09:04 PM
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BruteSpeed blower cam.

http://shop.brutespeed.com/Brute-Spe...d-Camshaft.htm
Old 01-12-2015, 12:52 AM
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You need a 6~12 deg forward split IMO. I have had guys use my single pattern turbo cams with blowers and they have worked ok but a little extra exh duration works better. I would not run a reverse for that application.
Old 01-12-2015, 09:58 AM
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Originally Posted by The Alchemist
Thanks! Bob
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