Originally Posted by qwiketz

Hi guys. I have a vortech supercharger kit for sale that fits 92-96 vettes with the lt1 or lt4 engine. It is a bolt on kit and you are able to retain your ac and all of the accessories. It uses the S trim compressor which is CARB legal. Price is $2250 and has been dropped from $2600.

The kit is highly upgraded. If you’re serious about getting a kit that works out the gate, this is it. You will not have to worry about belt slip or bleeding off boost from leaky bypass valves with this kit. The upgrades are:

- vortech mini race bypass valve (approx $250)
- 7 rib upgrade from 6 ribs
- Bracket modified for dual idler pullies which give more belt wrap ($750)
- Brand new tensioners (cost $110 from ford)
- Larger diameter inlet tubing (4” compared to 3”)
- Homemade anit rotation valve(better directs the air flow to the compressor)
- Discharge tube is drilled for dual alcohol injection nozzles
- Huge k&n air filter

All of these things are things that you’d want to do if you want to get good power out of the vortech kit. The stock kit is prone to belt slip and the stock kit doesn’t allow easy belt changes. The stock kit requires about 3-4 hours to change the blower belt and with this kit, it can be done in 15 minutes. I was getting belt slip at 6 psi with the stock setup and the new setup included here allowed for 10 psi of boost reliably and without slip. I have the kit instructions and all the little bolts bagged up.

To complete the kit, you’ll need a 255lph in tank fuel pump ($75), spark plugs a heat range colder and gapped tighter, bigger fuel injectors, and a tune to handle the spark needs and fuel needs. If you need injectors, I can offer to sell the injectors on my car which are 38’s. I’m pulling them off to install 60’s.

If you’re looking for a night and day performance difference, then this is it. This kit will reliably work on pump gas with alcohol injection and make excellent power. Even on junky 91 octance California gas, I never had a problem with detonation.

With all this work done to the kit, you’re probably asking why I’m selling it. Well, I’m selling it because I just upgraded to a vortech ysi compressor with custom bracketry and discharge tubing. Let me know if you have any questions, technical or otherwise. I can be reached at russriggs@yahoo.com . The kit is in CA and if you're local, you're more then welcome to come by and check everything out. Here's some pics of everything:

everything installed:


the head unit


here's the bracket with dual idler pullies. the tensioner pictured has been replaced since this photo was taken


more parts of the kit


here's everything else. Not pictured is the polished discharge tube that connects the blower to the throttle body. Also not shown is the polished bypass valve.

Originally Posted by SuperL98

Ok, the base setup for these is the stock lt1 block.
Ported LT1 heads from above (stock valves).
1.75 headers with 26 inch pipes.
58mm throttle.
7 inch crank and 3 inch super C pulley.
First is the stock cam
Second is CC LT1 276HR-14, 220/230, .510/.510, 114
Third is CC LT1 290HR-12, 230/244, .510/.540, 112
In the real world the Comp Cam's probably have a little advance ground in but I put them in straight up for now.



Not to dramatic a difference between these two.

BTW the boost @ 6000 was 9psi = Stk cam 8.2 = 276cam 7.7 = 290cam
Your going to see the boost drop as the engine breaths better...

I'll check back in, if you want any changes & can post detailed info on your final combination ... if you want to see it.

Originally Posted by SuperL98

Ok ... some lunchtime update
Yes, the blower hp is factored in, that's why I picked this program over the others, you can see the numbers used in the end (no voo-doo) and decide for yourself if you agree or not.

Originally Posted by SuperL98

Found a cam card for these and they run 4 deg advanced.
Put in a realistic "street" exhaust @ 800 cfm.
Backed down the timing to keep the "knock index" down to recommended 2.0.

Final Combination:
Stock LT1 bottom end, electric water pump (no alt, ac comp, ps etc - can't add them in)
Vortech S1, 7 and 3 inch pullies, H20 injection (80% eff intercooler)
1.75 headers 26 inch primaries
800 cfm exhaust (getting 3 psi back pressure - so bigger is better but louder
58mm throttle, stock LT1 manifold
Used 44 lbs nozzles @ 45 psi
LT1 heads ported as above, 10.4 comp (probably should lower this?)
Comp Cams 276hr-14 and 290hr-12 with 1.6 rockers.
Think that's most of it....

Originally Posted by BrianCunningham

He will be

Originally Posted by cuisinartvette

Brian Cuningham flew out to hang out for a few days to cehck out some parts weve picked up for his build and hang out here to get out of the Denver cold. My place looks like an auto parts store. Heads, intake, blower, motor parts, and now a B&B exhaust a (new) member andrew_huh brought over.

Originally Posted by SuperL98

Yes .. I can
First chance I've had to look back at this, been to busy
I worked on the model a bit more, dropped the head flow down a little because it looked high compared to most posted numbers.
Also pushed on the Vortech model after running some chevy and ford combinations I found posted.
Anyway here is a 350 vs. 383, everthing the same as the last model except a little less head flow and a different VS-1 model, using 290 cam (4.03 bore, 3.75 st, 6 inch rod on the 383)...


I also ran two similar LT1 S-Trim combinations I found on the net.
One 350 6 psi no intercooler, and one 355 15 psi w/intercooler.
Looks like we match the power curve shapes and peaks pretty good!
And if you subtract 15% or so, the HP matches the RWHP pretty good as well