Looking for input here... how does a Vortech S-trim on a 355 L98 with a superram, AFR heads with 9:1 compression and forged pistons sound?

I have an opportunity to get a very good deal on said supercharger and I'm going to be ordering my AFRs soon, so I thought I'd get your opinions

--andrew

Sounds like a LOT of fun to me.

BW

------------------
Bobalos
aka Bob W.
www.r71camaro.homestead.com
r71chevy@earthlink.net
<><

Should be no problem u might want to get a 52mm throttle bodie as well.

Go with it!!

------------------
-86 IROC
Jacked up like a mother!
this years goal: 10.50 @ 130+ mph
-=ICON Motorsports=-

Thanks for the input folks.

I already have a 52mm TB, 1.6:1 RRs, MSD ignition, 24# injectors and will be installing my 1 5/8" headers, high-flow cat and cat-back as soon as the headers arrive back from PBM.

Basically I wanted to know if what I'm thinking would be OK for this combo. With 72cc heads I'll be running right around 9:1 compression. With 64cc heads I'm up to 9.75:1 which is probably a little too high for non-intercooled boost.

Thanks again

--andrew

It will work very well. At 9:1 compression you have room for up to 9 psi of boost with no timiing retard. On my '94 Vette I ran 9.3 compression and 12 psi of boost. I didn't have to retard timing at 9 psi but I did at 12 psi. The only difference between the 9 psi setup and the 12 psi setup was a high flow custom made inlet tube to the supercharger. The pulley was still the 9 psi pulley on an S-trim V1.

Thanks.

So is there a consensus that 9:1 is a good ratio to start with? Should I take it any higher?

Thanks!

i basicly have the same set up and it works
great for me.

check out my simple page at:
http://darcom.home.texas.net/

------------------
388 SuperRam, DFI, Vortech R trim ,N.O.S.,alki injection,
Dart sportmansII heads,50 pound injectors, Headman full headers
duel 3' exhaust,and Flowmasters, Ford nine inch with 370's
Ronal rims with Nitto drad raidals.

With a D1SC, three-core intercooler and 8.912 to 1 compression, I have run seven pounds without timing retard. I have however injected a small amount of additional fuel via Superfueler. My best with five pounds of boost is a 12.26 @ 113.55 mph.

I have yet do take it any further, but here is my plan:

Water injection at eight pounds of boost and any additional fuel needed to retain full timing. Hopefully, this will take me into the mid-11's. My last resort is to retard timing.

So I would say that nine to one compression is VERY workable.

------------------
Willie

Supercharged 1987 305 IROC-Z, Daily-Driver, Emissions-Legal.
Former Paxton (6-psig): 12.57 @ 111 mph.
Former Paxton (6-psig) & former 50-hp nitrous: 12.04 @ 114 mph.
Current ATI D1SC (Initially 10-psig): Projecting high 11's.
Future ATI D1SC (15-psig): Gotta catch them pesky 26-psig boosted TTA's!!

http://willie.camaro-firebird.org/

1987 "20th Anniversary Commemorative Edition" Z28 Convertible -- Super Chevy Show Class Winner, 1998.

I hope it will work that's what i have, but it's not in yet. look at my site and keep in touch

------------------
SUPERCHARGED 87 GTA: Blk/Gld w/Superam, 355cid Trickflows, forged pistons 9.5:1. Auto 2,600 stall, 3.45 9 bolt disc, Best time & mph (Naturally Aspirated): 13.567 @ 101.900 w/ a poor 60ft. Best mph: 104.3 *This car is 100% NYS emissions legal, w/ all emissions controls!* "If you want to have a fast car, hang out w/ those who do!"
http:// www.community.webtv.net/munks87/JustinsGTApage.com
VORTECH S-TRIM, INSTALLATION IN PROGRESS: 10 & 15 LB> PULLEYS, CUSTOM HKS RACE BYPASS, CUSTOM DUCTING W/ COLD AIR, SWAPPING TO SERPENTINE, & MANY EXTRAS! BEST TIME: 11'S I GUESS. WE'LL SEE IN SPRING!