frans2k

I am running 9 lbs currently and I was just wanting to know if there was anyone running more boost with the Comptech SC. Another question I have is that I have gone through 2 belts in the last 3 weeks, I was wondering what could cause this? I know it can't be too much hp . Any help would be great, thanks.

B SweepeR B6

how do you like your s/c? i am deciding whether i should get a s/c, turbo, or N/A with ITB's. how do you like it? whp? 1/4 mile? run any cars?

xviper

I'm betting that you have your belt tightened way too tight in the belief that really tight will ensure max boost. Do you check the belt in the manner as prescribed in the kit installation manual? I've had my belt tightened once since it's install. This was the first tightening as dictated by the Vortech manual. It has been over a year and a half since and the belt is still at the right tightness (confirmed by the boost gauge) and it is still is good condition. Another possibility is that one of your pulleys is not running straight and true.

There have been indications of 11 psi putting out around 350 WHP. Boost in only part of the equation. It is the state of tune. You can have less boost but a higher state of tune to get more HP. This may not necessarily be better or safer than higher boost in a lesser state of tune to get about the same HP. You need to look at the whole equation and not just one variable.

hukares

I don't have any experience with S/C'ing an S but when you put on the smaller pulley to increase boost, it is much more likely that the belt will slip. Maybe that is your problem.
-Brian

xviper

Not if the pulley was designed for that blower and not if the pulley was installed correctly. If it was installed out of the same "plane" as the rest of the pulleys, then it would run and rub funny. With a smaller (and higher boost blower pulley) pulley, a shorter belt should have also been used.

dreamcation

I'm a little lost here
Shouldn't the topic be, How much boost can you run on a S/C engine?

xviper

I think we can figure out what he really meant.

AusS2000

The topic is correct. The word 'stock' is used as opposed to 'built'. The engine stock is designed for high compression NA and is not suitable for a lot of boost.

hukares

Maybe so with the S. I just wouldn't put so much trust in aftermarket high-boost pulleys that are supposedly "designed" for the supercharger. Vortech and many others sell pulleys so small that they cannot even be used without slipping, someone is going to buy them, 'of course they'll work with your seup'.

-Brian

dreamcation

Your right, but it also can viewed another way. I first looked at this thread as a How much boost can you run on a stock engine (with no mods). Alright sorry for going off topic