Any rear mounted Turbo C4's ?
Melting Slicks
Joined: Mar 1999
Posts: 2,535
Likes: 2
From: Rochester NY
Originally Posted by dizwiz24
rear mount turbos sound like a dumb idea.
What kind of boost do people claim they make with these, or more appropriately, what kind of turbo lag is there?
What kind of boost do people claim they make with these, or more appropriately, what kind of turbo lag is there?
How much boost you ask?? The answere is as much as you want it. Yes front mount turbo is better. But a rear mount is an alternative to making insane hp. As for turbo lag compared to front mounted and rear mounted. My car make full boost @4000rpm on a 383ci motor
My buddy BTF 383ci front mounted make full boost at 3500rpm. The different is around 500-600rpm or so. Some day i will try to go with a little smaller turbine housing to get full boost come on little earlier.
my turbine house is 1.18 a/r which is a little big for rear mount.
BTF turbine housing 1.23 a/r but front mount. Nothing is like the V8 with boost kick in on WOT.
Race Director
Joined: Sep 2001
Posts: 14,674
Likes: 751
From: NEwhere Ohio
Originally Posted by Bruce
How much boost you ask?? The answere is as much as you want it. Yes front mount turbo is better. But a rear mount is an alternative to making insane hp. As for turbo lag compared to front mounted and rear mounted. My car make full boost @4000rpm on a 383ci motor
My buddy BTF 383ci front mounted make full boost at 3500rpm. The different is around 500-600rpm or so. Some day i will try to go with a little smaller turbine housing to get full boost come on little earlier.
my turbine house is 1.18 a/r which is a little big for rear mount.
BTF turbine housing 1.23 a/r but front mount. Nothing is like the V8 with boost kick in on WOT.
My buddy BTF 383ci front mounted make full boost at 3500rpm. The different is around 500-600rpm or so. Some day i will try to go with a little smaller turbine housing to get full boost come on little earlier.
my turbine house is 1.18 a/r which is a little big for rear mount.
BTF turbine housing 1.23 a/r but front mount. Nothing is like the V8 with boost kick in on WOT.
Why'd you get rid of the nitrous/SC setup? Is the turbo that much better of an option? Id love to hear about your setup
Melting Slicks
Joined: Mar 1999
Posts: 2,535
Likes: 2
From: Rochester NY
The SC was great. But I prefered turbo as obvious and the sound of the turbo is addictive man. I went turbo because I am trying to make some big hp#. After almost 2 yrs of R&D with turbo I still don't have actual hp# yet. But it gradually coming along so far so good . Now I just need to fix some oil leak (Damn oil pan) and tune it with my new DFI Gen7+ ecu. Right now I am just taking a break not working on the car anymore for a while.
Race Director
Joined: Sep 2001
Posts: 14,674
Likes: 751
From: NEwhere Ohio
Originally Posted by Bruce
The SC was great. But I prefered turbo as obvious and the sound of the turbo is addictive man. I went turbo because I am trying to make some big hp#. After almost 2 yrs of R&D with turbo I still don't have actual hp# yet. But it gradually coming along so far so good . Now I just need to fix some oil leak (Damn oil pan) and tune it with my new DFI Gen7+ ecu. Right now I am just taking a break not working on the car anymore for a while.
Melting Slicks
Joined: Oct 2006
Posts: 2,314
Likes: 3
From: In a van down by the river! Florida
Any update on this? A guy I know has the STS TT kit on his C5Z and that thing is stupid fast, pushing 8#.
AND L O U D. At WOT it will scare the hell out of the other people.
AND L O U D. At WOT it will scare the hell out of the other people.
Race Director
Joined: Dec 1999
Posts: 10,230
Likes: 885
From: Alexandria, Virginia, USA VA
at carlisle chris from ECS had put a custom STS setup on a c6 Z06. stock shortblock. he kept the boost down to 6 and used alchy to boot because of the high compression ratio.
a big single or twins would work VERY well if setup properly on the turbine side. I have an older lt1 auto that BEGS for this setup. it's my wife's car but now my daily driver (keeps the miles off the LPE ZR-1 and the TT Z06 in bad weather)
I'm not that much of a tinkerer but if this car ever needs "freshening up" a low compression forged short block, big injectors, and a turbo will be in the works. with the price of c4s DIRT cheap, it sure is a tempting project. hope to see more info soon, custom fabbing it is out of my league and not worth it to pay.
FYI, the c5 TT cost a bundle but it makes an ez 700/700 to the wheels at 13 psi and another 100 cranked to 16 psi with the alchy thrown in. all on pump gas. granted, it wasn't cheap, but it runs VERY hard and drives on rails. way fun.
a big single or twins would work VERY well if setup properly on the turbine side. I have an older lt1 auto that BEGS for this setup. it's my wife's car but now my daily driver (keeps the miles off the LPE ZR-1 and the TT Z06 in bad weather)
I'm not that much of a tinkerer but if this car ever needs "freshening up" a low compression forged short block, big injectors, and a turbo will be in the works. with the price of c4s DIRT cheap, it sure is a tempting project. hope to see more info soon, custom fabbing it is out of my league and not worth it to pay.
FYI, the c5 TT cost a bundle but it makes an ez 700/700 to the wheels at 13 psi and another 100 cranked to 16 psi with the alchy thrown in. all on pump gas. granted, it wasn't cheap, but it runs VERY hard and drives on rails. way fun.
Racer
Joined: Sep 2000
Posts: 325
Likes: 0
From: Chicago IL
I really want to do a F/I setup, but the C4 doesnt have many options to go with (Supercharger) which is why I am trying to sell mine and get a Z06 to have some boosted fun with. If a mass produced TT setup for the C4 ever gets made, I'm all in.
Jimmy
Pro
Joined: Jan 2004
Posts: 707
Likes: 0
From: Syracuse Utah
I had my vette down to STS about a year and a half ago and they wouldn't give me the time of day. They are really a truck and camaro outfit. They had no interest in fabbing a kit to my 94 even with me paying full price to do it--too busy with camaros. They offered the universal kit back then but I was not impressed with what you got for your money. The return oil pump is their "secret" weapon which is why they won't sell it by itself.
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Pro
Joined: May 2002
Posts: 518
Likes: 17
How much ground clearance do you have Bruce?
Thanks...
Doug
Thanks...
Doug
Originally Posted by Bruce
The SC was great. But I prefered turbo as obvious and the sound of the turbo is addictive man. I went turbo because I am trying to make some big hp#. After almost 2 yrs of R&D with turbo I still don't have actual hp# yet. But it gradually coming along so far so good . Now I just need to fix some oil leak (Damn oil pan) and tune it with my new DFI Gen7+ ecu. Right now I am just taking a break not working on the car anymore for a while.
Melting Slicks
Joined: Jul 2004
Posts: 3,277
Likes: 32
From: Mission Viejo California
I saw my first rear mount camaro in person today. My buddies thought I was nuts when I started staring at a camaro. I talked to the guy a bit an he was pretty happy with the performance. i didn't ask numbers but maybe next time. He works in the same business park as me. It looked as though there were a couple low parts hanging down. That's how I was able to spot it.
Advanced
Joined: Oct 2004
Posts: 92
Likes: 0
From: Toms River NJ
I am currently working on this project. I have not officially started because I am in Grad school and can't find the time. However, I will be starting it this winter. I acquired a Holset H1e, got the blowoff valve, FMU, Wastegate, etc. and I will be using a stand alone oil pumping system. I have all the plans in my head and have been brainstorming this for quite some time and hope it goes according to plan. I made my own bracket to mount to the rear of the car and there is PLENTY of room back there. Although I have true dual exhaust, I am going to run one single pipe straight into the turbo. From there, the induction tubing will run where the second pipe of the dual exhaust used to run. The only tricky part will be running it up between the firewall and engine. It is a little tight there but it will make it.
Melting Slicks
Joined: Jun 2000
Posts: 3,215
Likes: 6
From: Tampa Florida
HP Performance...do you have a link?
Found it:
http://www.turbochargedpower.com/85-96%20Corvette.htm
Why can't someone make a clean turbo install on this chassis???
Found it:
http://www.turbochargedpower.com/85-96%20Corvette.htm
Why can't someone make a clean turbo install on this chassis???
Drifting
Joined: Oct 2005
Posts: 1,259
Likes: 0
From: bakersfield cali
look in this thread for more info on that kit.
http://forums.corvetteforum.com/show....php?t=1341859
http://forums.corvetteforum.com/show....php?t=1341859
Pro
Joined: Jan 2000
Posts: 569
Likes: 0
From: SLC, UT USA
Working on this rear mount system myself. Was told that I should drop down two sizes on the hot side, because of the heat lost as the exhaust moves to the rear of the car.
The engine still needs the same amount of intake air, so the cold side of the turbo or turbos should be sized for the engine and horse power target.
I'm adding a dry sump pump to pull the oil out of the turbos and use another stage of the pump to create negative pressure in the crankcase. In a NASCAR setup a five stage dry sump system will create some 20" - 25". I don't expect expect anywhere that kind of vacumm using just one stage of the pump for the crankcase. To keep things easy for now, this one will not have a dry sump oil system for the engine oil, just the turbos and crankcase.
The engine still needs the same amount of intake air, so the cold side of the turbo or turbos should be sized for the engine and horse power target.
I'm adding a dry sump pump to pull the oil out of the turbos and use another stage of the pump to create negative pressure in the crankcase. In a NASCAR setup a five stage dry sump system will create some 20" - 25". I don't expect expect anywhere that kind of vacumm using just one stage of the pump for the crankcase. To keep things easy for now, this one will not have a dry sump oil system for the engine oil, just the turbos and crankcase.
