Twin turbo Chevelle update!
Twin turbo Chevelle update! I finally made a little more progress on my '71 ls1 powered twin turbo Chevelle. I have a few welds to finish up on the down pipes, plumb the turbo oil system, wire the motor, hook up the intercooler tubes and I am about done.
ALOT of welding on this baby! I am on my 4th tank of argon!! The intercooler and headers took the longest. I only have about a week of work left, but with my schedule, it will take 3.
I can't wait! 
ALOT of welding on this baby! I am on my 4th tank of argon!! The intercooler and headers took the longest. I only have about a week of work left, but with my schedule, it will take 3.
I can't wait! Last edited by nitrorocket; Jul 26, 2005 at 08:58 PM.
The turbos are turbonetics 60-1 hi fi's with a .68 A/R. They have a 2.75" inlet and 2 inch outlet. I have dual 3" to the bumper. I have fenderwells, I have the drivers out right now for some wiring.
Last edited by nitrorocket; Jul 26, 2005 at 08:34 PM.
My goal is to have it running in the middle of august. I will have welding complete this week and then it's wiring time! I hope it makes good power, I never had an ls1 before, I am a SBC guy, so I guess I will have to see! I am glad I built it myself, I bet this kit would be $15,000 if I were to have someone else build it. Needless to say it was very cheap to build. I had the luxury of buying parts over a 8 month period so I saved alot by finding good deals.
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words can't express how beautiful that looks! nor can they express how excited i am about getting my twin setup together. i can't wait for a ride in that beast man. for those that don't know......that whole system was fab'd by nitro' himself right down to those bad *** colectors and the intercooler itself! 
git r done!!!
Dave
git r done!!!
Dave
GORGEOUS! Just one question... why did you run the downpipes over the engine instead of under it (near the street)??
Originally Posted by nitrorocket
I finally made a little more progress on my '71 ls1 powered twin turbo Chevelle. I have a few welds to finish up on the down pipes, plumb the turbo oil system, wire the motor, hook up the intercooler tubes and I am about done.
ALOT of welding on this baby! I am on my 4th tank of argon!! The intercooler and headers took the longest. I only have about a week of work left, but with my schedule, it will take 3. I can't wait!
ALOT of welding on this baby! I am on my 4th tank of argon!! The intercooler and headers took the longest. I only have about a week of work left, but with my schedule, it will take 3.
I can't wait! 
I have more pics, but I have to spend some time and edit them to fit on this board first.
Well, as far as how did I make the bends? I bought (12) U-bends, cut'em up and that is how I made the headers. They are 1.75" 321 stainless. The flanges were very complicated to design and I actually had them drawn up on Solidworks for a 3-D model and made paper templates to wrap around the tubes to get the correct cuts. Saved me about $900!!!
I ran the downpipes ( I guess I should call them up-pipes!)
up over the headers because with a full chassis Chevelle I had no other route. I was'nt about to mount them below the crossmember.
As far as total turbo setup cost, I have almost $5000 invested, Was not cheap. And that was getting stuff at unbelievable prices.
I will be tuning the car myself with my EfiLive setup and wideband at the track, although, if anyone would like to donate some files of a similar setup to get me going, I sure would'nt complain!
I'd be happy to share any info with anyone. I was very easy, just very time consuming!
Here is a little breakdown:
347" ls1
-8.1:1 compression
-TEA stage 2 heads
-LS6 Intake
-Comp cam
-Twin 60-1 hi-fi turbos
-Twin Turbonetics Racegates
-Tial 50mm bov
-Spearco 1500 cfm intercooler
-1.75" 321 headers
-3" dual exhaust
-Turbosmart boost controller
-96 lb injectors
-Stock pcm
And a whole bunch of other minor little stuff that would take me a day to list!
I am hoping to see about 700 rwhp on pump gas and about 850-900 rwhp on race gas, but it really does'nt matter as long as the car will spin the tires from a stop light.
Well, as far as how did I make the bends? I bought (12) U-bends, cut'em up and that is how I made the headers. They are 1.75" 321 stainless. The flanges were very complicated to design and I actually had them drawn up on Solidworks for a 3-D model and made paper templates to wrap around the tubes to get the correct cuts. Saved me about $900!!!
I ran the downpipes ( I guess I should call them up-pipes!)
up over the headers because with a full chassis Chevelle I had no other route. I was'nt about to mount them below the crossmember.As far as total turbo setup cost, I have almost $5000 invested, Was not cheap. And that was getting stuff at unbelievable prices.
I will be tuning the car myself with my EfiLive setup and wideband at the track, although, if anyone would like to donate some files of a similar setup to get me going, I sure would'nt complain!
I'd be happy to share any info with anyone. I was very easy, just very time consuming!
Here is a little breakdown:
347" ls1
-8.1:1 compression
-TEA stage 2 heads
-LS6 Intake
-Comp cam
-Twin 60-1 hi-fi turbos
-Twin Turbonetics Racegates
-Tial 50mm bov
-Spearco 1500 cfm intercooler
-1.75" 321 headers
-3" dual exhaust
-Turbosmart boost controller
-96 lb injectors
-Stock pcm
And a whole bunch of other minor little stuff that would take me a day to list!
I am hoping to see about 700 rwhp on pump gas and about 850-900 rwhp on race gas, but it really does'nt matter as long as the car will spin the tires from a stop light.
Damn bro you're gonna be at 700rwhp easy... on pump gas!
Originally Posted by nitrorocket
I have more pics, but I have to spend some time and edit them to fit on this board first.
Well, as far as how did I make the bends? I bought (12) U-bends, cut'em up and that is how I made the headers. They are 1.75" 321 stainless. The flanges were very complicated to design and I actually had them drawn up on Solidworks for a 3-D model and made paper templates to wrap around the tubes to get the correct cuts. Saved me about $900!!!
I ran the downpipes ( I guess I should call them up-pipes!) up over the headers because with a full chassis Chevelle I had no other route. I was'nt about to mount them below the crossmember.
As far as total turbo setup cost, I have almost $5000 invested, Was not cheap. And that was getting stuff at unbelievable prices.
I will be tuning the car myself with my EfiLive setup and wideband at the track, although, if anyone would like to donate some files of a similar setup to get me going, I sure would'nt complain!
I'd be happy to share any info with anyone. I was very easy, just very time consuming!
Here is a little breakdown:
347" ls1
-8.1:1 compression
-TEA stage 2 heads
-LS6 Intake
-Comp cam
-Twin 60-1 hi-fi turbos
-Twin Turbonetics Racegates
-Tial 50mm bov
-Spearco 1500 cfm intercooler
-1.75" 321 headers
-3" dual exhaust
-Turbosmart boost controller
-96 lb injectors
-Stock pcm
And a whole bunch of other minor little stuff that would take me a day to list!
I am hoping to see about 700 rwhp on pump gas and about 850-900 rwhp on race gas, but it really does'nt matter as long as the car will spin the tires from a stop light.
Well, as far as how did I make the bends? I bought (12) U-bends, cut'em up and that is how I made the headers. They are 1.75" 321 stainless. The flanges were very complicated to design and I actually had them drawn up on Solidworks for a 3-D model and made paper templates to wrap around the tubes to get the correct cuts. Saved me about $900!!!
I ran the downpipes ( I guess I should call them up-pipes!)
up over the headers because with a full chassis Chevelle I had no other route. I was'nt about to mount them below the crossmember.As far as total turbo setup cost, I have almost $5000 invested, Was not cheap. And that was getting stuff at unbelievable prices.
I will be tuning the car myself with my EfiLive setup and wideband at the track, although, if anyone would like to donate some files of a similar setup to get me going, I sure would'nt complain!
I'd be happy to share any info with anyone. I was very easy, just very time consuming!
Here is a little breakdown:
347" ls1
-8.1:1 compression
-TEA stage 2 heads
-LS6 Intake
-Comp cam
-Twin 60-1 hi-fi turbos
-Twin Turbonetics Racegates
-Tial 50mm bov
-Spearco 1500 cfm intercooler
-1.75" 321 headers
-3" dual exhaust
-Turbosmart boost controller
-96 lb injectors
-Stock pcm
And a whole bunch of other minor little stuff that would take me a day to list!
I am hoping to see about 700 rwhp on pump gas and about 850-900 rwhp on race gas, but it really does'nt matter as long as the car will spin the tires from a stop light.