Vortech S-trim

I am looking for a streetable and relatively quiet supercharger, but I want enough power to go 10's.
I have a gen 1 small block 383 with forged bottom end, 8:1 comp, Trick flow 195 heads and a Comp xe 224/236 .573/.593 116lsa cam single plane efi intake with custom elbow and 75mm t/b. I'm using a n Electromotive tec2 and either 55 or 72 lb inj.
I would like to know what kind of power/times guys have made wit an s-trim.
Thanks, Steve

I am looking for a streetable and relatively quiet supercharger, but I want enough power to go 10's.
I have a gen 1 small block 383 with forged bottom end, 8:1 comp, Trick flow 195 heads and a Comp xe 224/236 .573/.593 116lsa cam single plane efi intake with custom elbow and 75mm t/b. I'm using a n Electromotive tec2 and either 55 or 72 lb inj.
I would like to know what kind of power/times guys have made wit an s-trim.
Thanks, Steve
>go with the T-trim not quiet but alot of power I wish I went with the YSi-trim off the bat.

Anyone else?

I also say the T-Trim is a better choice. It is a little louder but the ability for more power makes up for that.

I also say the T-Trim is a better choice. It is a little louder but the ability for more power makes up for that.>I just noticed that he has a D1SC so going to a T-trim is probably the same power. I think he wants to go stealthy ;)

is that a good blower cam? 116Lsa?

I would agree with the other guys and go with at least a T-Trim. I just converted from an S to a T on my setup and am glad i did. I think i was working that S-trim. And as far as my experience with noise, the T-trim i have now is no louder then the S-trim i had.

Ken R.

>I just noticed that he has a D1SC so going to a T-trim is probably the same power. I think he wants to go stealthy ;)

is that a good blower cam? 116Lsa?


stealthy with a T-trim or D-1??? lol what are you gonna say?? "oh that noise?? ehh just a bunch of screaming chickens under the hood thats all"??

stealthy with a T-trim or D-1??? lol what are you gonna say?? "oh that noise?? ehh just a bunch of screaming chickens under the hood thats all"??









>No I meant going stealthy with a S-trim quiet model. The noise is from the louder models i.e. T-trim, D1SC, etc.

My d1sc and mondo bypass (to atmosphere) is REAL LOUD! I don't know if I care so much about stealthy as I do my sanity while cruising. The reason for looking toward Vortech is the bad luck I've had with my Procharger. My bro has an s-trim on his stang with 10k plus miles and it has performed flawlessly.
The 116 lsa cam seems to work well for me, I have about 15" vac at idle and the car went 11.49 @120mph with an f'd-up motor and 10psi last year. This year with a new motor and 15psi it feels great but I'm running out of injector (55lb), so I am trying to run a staged setup with 4 extra 30lb injectors. I had to send the blower back to ATI before I could tune it though.
Steve

LJ ran 9.9x at 140 in a full weight LT1 car with a Vortech S-trim at 12 psi.

LJ ran 9.9x at 140 in a full weight LT1 car with a Vortech S-trim at 12 psi.>then with a T-trim he should be able to run sub 9.0's :)

How much does the car weigh? An S-trim is going to make mid 500's rwhp depending on drivetrain losses (manny tranny vs. auto, converter stall, etc.). If the car is light you could certainly see 10's or even high nines. But in terms of running a number, a lot depends on how well the car is set up for the drags. I've got a buddy with a 346SBF and an S-trim in his Mustang running 9.80's. But the car weighs only 3,200lbs, has a Lenco and decent suspension, etc. When I had an S-trim, I couldn't break into the 10's without N2O, but my car weighs over 4,000lbs with driver and does not have a drag type suspension.

Anyway, like I said, expect rwhp in the mid 500's or even 600 if everything else is optimized and figure your potential performance from there based on weight, traction, etc.

Rich

>then with a T-trim he should be able to run sub 9.0's :)

I don't think the T-trim is that much better than the S-trim.

I don't think the T-trim is that much better than the S-trim.

S-trim = 1,000cfm ~650hp*
T-trim = 1,200cfm ~800hp*

*POTENTIAL engine (flywheel) hp. I am currently running a Procharger F1 (1500cfm) and making ~700rwhp (through a loose converter) without the N20. Figuring ~20% loss, that's about 900hp. At least 100 shy of the theoretical maximum.

Rich

The compressor cfm is based on some boost level. Obviously, the more air the engine flows, the lower the boost will be, the higher the total flow will be. LJ's 140 mph at ~3750 lb indicates nearly 800 fwhp from an S-trim. Conversely, I was only able to run 133 mph at the same weight with a T-trim running the same pulley ratio as he was. That indicates I was only making about 680 fwhp.

The compressor cfm is based on some boost level. Obviously, the more air the engine flows, the lower the boost will be, the higher the total flow will be. LJ's 140 mph at ~3750 lb indicates nearly 800 fwhp from an S-trim. Conversely, I was only able to run 133 mph at the same weight with a T-trim running the same pulley ratio as he was. That indicates I was only making about 680 fwhp.

Take a look at a compressor map for the S-trim.

http://www.vortechsuperchargers.com/images/s-trim_map.gif

Regardless of boost pressure, 1,000cfm will not produce more than ~650-700hp in a typical 2-valve OHV V-8 and will usually produce less. If you try to spin the SC faster, you will heat the air more and take more power to drive the impeller. The result will be more boost pressure but less hp. You made less hp with a higher output blower due to a lower VE. As you suggest, your boost was probably higher. Another way to look at it is as follows. What do you think would happen if you put an S-trim on an NA Pro Stock motor? It would decrease horsepower and would decrease manifold pressure (increase vacuum), not increase it! This is because the motor is already moving far more than 1,000cfm, probably in the range of 2,000+cfm.

I don't know anything about LJ's combo, but he must have some awesome heads, etc. to get that kind of hp out of an S-trim. I stand by my generalizations non-withstanding. An exception does not negate the rule.

Rich

What do you think would happen if you put an S-trim on an NA Pro Stock motor?

It would make way more than Vortech's rating of 650 hp and 1000 cfm.

Notice on Vortech's compressor map that they did not run the compressor all the way to stonewall. Based on the curves, and the fact that none of them nosedive, stonewall is probably around 85 - 90 lb/min, which equates to way over 650 hp. I think that their rating is more of a fuzzy "what most people can expect" number.

Mike

Blown69nova - my s-trim only has 2,000 street miles on it. what are you going to do with your Procharger? interested in some kind of trade/deal? i like the noise they make. my s-trim is the newer design and has the quiter gears in it so you only hear a little whistle.

The compressor map doesn't take into account intercooling. I think the S-trim has way more potential than people think.

If you want a quiet unit, the V2 S-trim would be perfect. It should be able to run tens with a nicely built motor. It is capable of 680 hp per vortech, but this is only on paper and no intercooler. I have this blower and it has performed very well. FYI, you can hear it, it's not silent.

The other supercharger unit I thought of is the Paxton Novi 2000. I think it's too big to fit in the f-body engine compartment, and they never offered an f-body kit, so you would have to fab up a custom bracket. The mustangs run these.