Video of my cars drivability and and spoolup with new 3" piping
03-04-2010, 11:06 AM
#1
Video of my cars drivability and and spoolup with new 3" piping So my car went back to my friend 1320's shop for some changes. This time around all the piping was changed out. Inter cooler piping was replaced with 3" from turbo to intake. Exhaust was redone in 3" from manifolds to turbo and tucked up higher than the previous 2.5" piping setup.
In order to keep as much heat in the exhaust as possible the length of the piping was shortened up by running both i/c and exhaust under the rear end. The exhaust was also ceramic coated inside,outside and then insulated with 150' of header wrap using 1" overlap. The only problem with going under the axle is during the lifting of the car, the rear end wants to drop and hit the piping. That was solved by installing chain to limit how far the rear end can drop. Works great and there is still plenty of upward travel left.
When the old setup was taken apart it was noticed that the quick spool valve was not closing (had around a 0.25" gap) or opening the entire way due to binding on the exhaust piping. This issue was also solved with the new exahust.
The big question is did any of this make a difference and the answer is yes, a very big difference. Previously with the boost controller off and a 1 bar spring I'd see 14.5psi. With the new setup I'm seeing 17psi. This means that back pressure has dropped. I don't know how much though since I'm too lazy to install a gauge, but a gain of 2.5 psi at the manifold with the same WG spring is pretty impressive.
It also spools about 2x as fast as before. I'll have to data log it to figure out exactly how much faster it is than before but I feel comfortable saying 2x faster. The fast spoolup actually makes it a bit challenging to drive due to copious wheel spin. The faster spool up also makes it more fun to drive.
Here is a short video I made of how the car drives around with my odd setup. Drives really nice with the 2.75 gears and 28" tires.
I'll post up the pictures of the Y pipe a little later.
http://www.streetfire.net/video/New-...ust_739094.htm
In order to keep as much heat in the exhaust as possible the length of the piping was shortened up by running both i/c and exhaust under the rear end. The exhaust was also ceramic coated inside,outside and then insulated with 150' of header wrap using 1" overlap. The only problem with going under the axle is during the lifting of the car, the rear end wants to drop and hit the piping. That was solved by installing chain to limit how far the rear end can drop. Works great and there is still plenty of upward travel left.
When the old setup was taken apart it was noticed that the quick spool valve was not closing (had around a 0.25" gap) or opening the entire way due to binding on the exhaust piping. This issue was also solved with the new exahust.
The big question is did any of this make a difference and the answer is yes, a very big difference. Previously with the boost controller off and a 1 bar spring I'd see 14.5psi. With the new setup I'm seeing 17psi. This means that back pressure has dropped. I don't know how much though since I'm too lazy to install a gauge, but a gain of 2.5 psi at the manifold with the same WG spring is pretty impressive.
It also spools about 2x as fast as before. I'll have to data log it to figure out exactly how much faster it is than before but I feel comfortable saying 2x faster. The fast spoolup actually makes it a bit challenging to drive due to copious wheel spin. The faster spool up also makes it more fun to drive.
Here is a short video I made of how the car drives around with my odd setup. Drives really nice with the 2.75 gears and 28" tires.
I'll post up the pictures of the Y pipe a little later.
http://www.streetfire.net/video/New-...ust_739094.htm
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03-04-2010, 09:39 PM
#15
How is my spool up compared to what your 1.00 a/r ST80 did up front? I did this video and others like it because I see very few people posting this kind of information and think it's helpful. I use to search and make posts for this kind of stuff years ago when I wanted to make changes to the car.
For those that want to see the i/c piping I'll try to get some tomorrow, just didn't have the time to do it yesterday. Car is back under surgery.
03-04-2010, 10:01 PM
#16
Thanks ninetres, speedo is within 1mph based off GPS. I think it's going to go 9's with track prep, feels really fast. Since the car is getting closer to being race legal I'll be able to run on TNT days when they prep the track. I have enough power to cut low 1.3 60's, I just don't have the traction yet. 1320 and friends are fabbing up a torque arm, lower control arms and other stuff for the car next. He also managed to pull another 36lbs off the front of the car and can probably get another 15lbs, battery is still up front too for now.
How is my spool up compared to what your 1.00 a/r ST80 did up front? I did this video and others like it because I see very few people posting this kind of information and think it's helpful. I use to search and make posts for this kind of stuff years ago when I wanted to make changes to the car.
For those that want to see the i/c piping I'll try to get some tomorrow, just didn't have the time to do it yesterday. Car is back under surgery.
How is my spool up compared to what your 1.00 a/r ST80 did up front? I did this video and others like it because I see very few people posting this kind of information and think it's helpful. I use to search and make posts for this kind of stuff years ago when I wanted to make changes to the car.
For those that want to see the i/c piping I'll try to get some tomorrow, just didn't have the time to do it yesterday. Car is back under surgery.
03-05-2010, 10:17 AM
#18
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nice looking work buddy i like your car 10 flats 2.75 gear and a turbo 400. love it im thinking about doing my drivetrain the same as you. i like to drive my car alot and i like the track as well.
cant wait to see some 9sec blasts
cant wait to see some 9sec blasts
03-05-2010, 11:25 AM
#20
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Very impressive, exhaust looks killer and that is a big turbo tucked under there. Do you have any pics from the back of the car? If im ever in vegas ill pm you and check out that missle in person!