It's obvious that you don't own an YSI.

 

So are you going to tell us why it doesnt make for a good street blower?.

 

If your only gonna run 12-15 psi, why bother going YS. Vortech makes a complete kit that uses a T-trim. That would good enough for 800-900 hp.

 

I have a 3.12 Vortech pulley for sale, that might keep the boost down.

I would sell my YS Trim at a loss to get a YSi, email me at prostockjohn@hotmail.com it has a grand total of 15 dyno pulls on it.

A blower is just a blower. Won't affect streetability at the 1200-1600 cfm level.

 

A T-trim will not make 800-900 hp on an LS1, unless you add NOS.

 

Stealth, any particular reason you think that Vortech went through the time and trouble to get the YS series smog certiified?

I made 746rwhp, unlocked T400, with a YS trim (1500 cfm), Griffin FMIC, FAST system, VP C12 (108 motor octane; leaded), and 17 lbs of boost at 6800 rpms. That was with the 8.0 crank and 2.85 blower pulley setup. 8 rib stuff.

So in my mind I would be looking at blower pulleys in the 3.12 up to 3.3 range.

 

Why not.. it has made over 900 on a 414CID LT1 why not an LS1?

 

Thanks for all the replies guys.

I've finally decided to give the V2 SQ trim a try first and see what it does, as I might be happy with it after all. I am going to have to relocate part of my fuel system to install the aftercooler too, and possibly relocate the battery and install a bigger reservoir tank. At least the gear whine will be gone, the car sounds better without it IMO.

If this don't work, there is always the YS trim waiting in the wings
Maybe by then Vortech will wake up and build a kit for the LT1.

 

Id say go for the T-trim the first time

 

I thought the Ls1 blowers were reverse rotation. How exactly would this work on an LT1?

 

Sounds like an internet rumor to me. The T-trim makes 1200 cfm, which cannot be converted into 900 rwhp on a 414 CI motor. We could ask Vortech, but I have not even heard of a 1600 cfm YSI-trim making 900 rwhp on an LT1 or LS1.

 

FLYWHEEL HP! Not rwhp.. rwhp its out of its range...

Vortech said that S-trims where rated to 680 flywheel HP... and there where cars making 630rwhp!!!

As for the T-trim...
If its a rumor i dont know...

http://96silverz.cz28.com/

Check that one out.. he did 825 on pump gas and 925 with a 402CID, sorry not a 414 I was mistaken.

 

Well, my first question is, how did he measure flywheel hp, was it on an engine dyno? I doubt it.

Second, I raced an S-trim for 2 years on a 346 LS1. It will make around 8 lbs of boost and maybe 490 rwhp with a 4L60E, heads, cam, headers, aftercooler, etc. I'm skeptical about these Vortech numbers.

We need to be clear here. If I could figure a way to bolt an S-trim to my 622 BBC, it might make 1000 hp, but that would not be relevant to LT1 and LS1s or "blower" performance.

I've made ~775 rwhp with a YS and I will dyno my new YSI setup in a week or two, but I doubt that a 400 ci LT1 or LS1 will make 850 rwhp with a 1600 cfm YSI blower.

 

I could probably make about 800rwhp with my 348ci, a YSi, and C16. Might be able to squeeze 825rwhp out of it depending on how well the fuel upgrade worked.

 

An s-trim is capable of the same thing more or less depending on efficiency of the engine, but it has a range... An engine regardless of its size or configuration can make the HP given by how much air it ingests vs how much air it expells... If the engine can ingest (bbc) more than the supercharger can send there will be 0 boost... No matter in what engine the Supercharger or turbo has the same range potential.. In that case it will NEVER make 1000rwhp on a bbc.

That dyno WAS on an engine dyno....

George baxter and znines did a bit more HP than 800rwhp with a YS-trim... I would love to know why you say this is impossible?

Regarding streetable.. I think we are way beyond the limits of streetable when we start talking about 700rwhp+ why? because pump gas will not support it, and I dont think that crusing around town with a car that sucks 13mpg on $8.5-$9 a gallon is something that is streetable. If you lower boost to run pump gas then its another "setup" and it doesn't count as street performance.