I want to build a fully forged 383 LT1 for boost, car will have fully ported LE trick flows that will flow around 295/230. Car will be street driven M6 and I want about 600rwhp. Should I go T-Trim with Aftercooler, or ATI D1SC. The vortech is a little more money but I would rather pay more for a better kit. Which system would you go with and why? Thanks for any help you can offer.
Randy Molkentine

 

I sure wish ATI would publish their compressor maps so we could compare them to the readily-available Vortech maps. The fact that they don't makes me suspect. . .

 

Either will easily eclipse your goal of 600 rwhp.

 

I am not to concerned with meeting the 600hp goal as either should do it, I am really interested in which one is the better quality kit for that level of power. Will the T-trim get into boost quicker? Basically if you were buying one which would you choose and why?

 

What you really need is the Vortech Ysi blower. Vortech doesn't sell direct fit brackets but you can get the S trim brackets and modify them.

I run the smaller V2 blower. It is great...and quiet! But I have only a 355.

 

if i had to do it over i would of gotten YSi trim but from what i understand a D1 will deliver a little more power then T trim. Dont want to start any wars here though. The Procharger famous for belt alignment issues that will drive you crazy. Prochargers are also louder dont know if you into that kind of stuff, but my d1 screams from miles away "look at me i have a blower"

 

I have also been looking at the ysi trim blowers. Is this blower streetable? Does anyone sell it in a kit? Thanks again,
Randy

 

Logical blower choice starts with estimating tha amont of boost you plan to make. From there, combined with displacement you can estimate the needed CFM. You don't want a bigger blower than you need to make the desired boost. The major exception would be definite plans for more boost (or a bigger motor) in the future. The following are flow ratings and estimated max boost for each unit on a 383 spinning ~6,500rpm.

T 1,200cfm ~10-12psi
YSi 1,600cfm ~18-20psi
D1 1,400cfm ~12-14psi
F1 1,525cfm ~16-18psi

So, comparing the YSi to the D1 is apples to oranges, the Ysi is a much bigger blower. The kits are pretty comparable. I have run both with good results. You need to decide how big a blower you need.

Rich

 

Rich you have run the YSi?

For brackets... Chris Zorka is the man. I can post pics if needed of the brackets he made for me.

 

Not on my own car, on a friends.

Rich

 

F1... 22 psi here. I'd stay away from an aftercooler and go with a FMIC.

 

I made 15 psi from a T-trim on a 383 at 6500 rpm through a Vortech Aftercooler.

 

When you see high boost relative to the size of the blower the motor is not breathing well.

Rich

 

I guess "breathing well" is a relative term. I have AFR 210's flowing 280i/218e, 224/236 high lift with 1.6i/1.52e rockers, Hooker 1 3/4 LT's, etc. . .

 

I agree, the term is relative.

Rich