Vortech S-trim with 9:1 compression?
#1
Senior Member
Thread Starter
Vortech S-trim with 9:1 compression?
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
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
#5
Senior Member
Thread Starter
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
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
#6
COTM Editor
iTrader: (22)
Join Date: Mar 2001
Posts: 10,026
Likes: 0
Received 1,923 Likes
on
1,312 Posts
Car: '89 Firebird
Engine: 7.0L
Transmission: T56
<font face="Verdana, Arial" size="2">Originally posted by afgun:
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?</font>
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?</font>
#7
Senior Member
Thread Starter
Thanks.
So is there a consensus that 9:1 is a good ratio to start with? Should I take it any higher?
Thanks!
So is there a consensus that 9:1 is a good ratio to start with? Should I take it any higher?
Thanks!
Trending Topics
#8
Member
Join Date: Feb 2001
Location: san antonio tx usa
Posts: 277
Likes: 0
Received 0 Likes
on
0 Posts
Car: 84z28
Engine: chevy 388
Transmission: 700r4
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.
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.
#9
TGO Supporter
iTrader: (1)
Join Date: Jul 1999
Location: Tucson, Arizona USA
Posts: 2,926
Likes: 0
Received 4 Likes
on
4 Posts
Car: 1987 Z28 Convertible
Engine: 305 TPI
Transmission: 5-speed
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 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.
#10
Senior Member
iTrader: (3)
Join Date: Jul 1999
Location: Long Island, NY
Posts: 844
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1987 GTA
Engine: 645hp/656 ft lb Blown 383
Transmission: 700-R4 3,000 stall
Axle/Gears: 3.55 moser 12-bolt
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!
------------------
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!
Thread
Thread Starter
Forum
Replies
Last Post
WhteRbt
Tech / General Engine
2
09-21-2015 09:48 AM