No more GT42r, just a small T4 now.
No more GT42r, just a small T4 now.
We took the GT42 off or our black drag EVO. Decided it was time to put a smaller turbo on the car and try to get the car down the track consistently and when we can do that then put the bigger turbo back on.
My brother, Daniel, found that our turbo was damaged when it came off anyway, so it was a good thing we pulled it and probably part of the reason we haven't set the world on fire in our two only outings with the car. The turbine wheel was hitting the housing pretty hard.
Robert at Forced Performance sent me an HTA88, which is his new billet compressor wheel on a P-trim turbine wheel.
The turbo was as laggy as the GT42 and was down 250 whp. Not what I was hoping for. We had a smaller turbine housing shipped overnight to us and ran the car again today. Still not much better for spool up.
I put an HTA35r on the car next with a T4 housing and dyno'd the car again. Still not happy with the power or spool up we swapped the HTA88 back on the car and decided to give it a shot.
For reference the car only made 660 whp in 3rd gear on our dyno. Peak boost was only 42 psi.
First pass the tires spun bad. The car still managed a 9.4. Second pass the car bogged, two step was too low.
The third pass we finally got the two step close and Daniel was able to run a 9.24 at 148 mph. When he got back to the trailer he said the car didn't sound right and rather than finishing the run he lifted. We checked everything over and I checked the log, made some minor changes and then we waited 3 hours for our next pass..........
The last pass of the night the car spun hard again causing the suspension to unload and load again. It didn't look too hot. Ends up the pass was better than expected and ran a 9.3 at 158 mph.
Not enough passes to get anything sorted but it sure is a lot easier getting a car down the track with 250 less whp than we had.
I want to try and hit a track rental so we can do some real testing. Work on the suspension and get everything working together.
I'm pretty confident the car would go 8.90's on this turbo at 160 or so.
Fun night at the track and left with everything in one piece.
My brother, Daniel, found that our turbo was damaged when it came off anyway, so it was a good thing we pulled it and probably part of the reason we haven't set the world on fire in our two only outings with the car. The turbine wheel was hitting the housing pretty hard.
Robert at Forced Performance sent me an HTA88, which is his new billet compressor wheel on a P-trim turbine wheel.
The turbo was as laggy as the GT42 and was down 250 whp. Not what I was hoping for. We had a smaller turbine housing shipped overnight to us and ran the car again today. Still not much better for spool up.
I put an HTA35r on the car next with a T4 housing and dyno'd the car again. Still not happy with the power or spool up we swapped the HTA88 back on the car and decided to give it a shot.
For reference the car only made 660 whp in 3rd gear on our dyno. Peak boost was only 42 psi.
First pass the tires spun bad. The car still managed a 9.4. Second pass the car bogged, two step was too low.
The third pass we finally got the two step close and Daniel was able to run a 9.24 at 148 mph. When he got back to the trailer he said the car didn't sound right and rather than finishing the run he lifted. We checked everything over and I checked the log, made some minor changes and then we waited 3 hours for our next pass..........
The last pass of the night the car spun hard again causing the suspension to unload and load again. It didn't look too hot. Ends up the pass was better than expected and ran a 9.3 at 158 mph.
Not enough passes to get anything sorted but it sure is a lot easier getting a car down the track with 250 less whp than we had.
I want to try and hit a track rental so we can do some real testing. Work on the suspension and get everything working together.
I'm pretty confident the car would go 8.90's on this turbo at 160 or so.
Fun night at the track and left with everything in one piece.
We took the GT42 off or our black drag EVO. Decided it was time to put a smaller turbo on the car and try to get the car down the track consistently and when we can do that then put the bigger turbo back on.
My brother, Daniel, found that our turbo was damaged when it came off anyway, so it was a good thing we pulled it and probably part of the reason we haven't set the world on fire in our two only outings with the car. The turbine wheel was hitting the housing pretty hard.
Robert at Forced Performance sent me an HTA88, which is his new billet compressor wheel on a P-trim turbine wheel.
The turbo was as laggy as the GT42 and was down 250 whp. Not what I was hoping for. We had a smaller turbine housing shipped overnight to us and ran the car again today. Still not much better for spool up.
I put an HTA35r on the car next with a T4 housing and dyno'd the car again. Still not happy with the power or spool up we swapped the HTA88 back on the car and decided to give it a shot.
For reference the car only made 660 whp in 3rd gear on our dyno. Peak boost was only 42 psi.
First pass the tires spun bad. The car still managed a 9.4. Second pass the car bogged, two step was too low.
The third pass we finally got the two step close and Daniel was able to run a 9.24 at 148 mph. When he got back to the trailer he said the car didn't sound right and rather than finishing the run he lifted. We checked everything over and I checked the log, made some minor changes and then we waited 3 hours for our next pass..........
The last pass of the night the car spun hard again causing the suspension to unload and load again. It didn't look too hot. Ends up the pass was better than expected and ran a 9.3 at 158 mph.
Not enough passes to get anything sorted but it sure is a lot easier getting a car down the track with 250 less whp than we had.
I want to try and hit a track rental so we can do some real testing. Work on the suspension and get everything working together.
I'm pretty confident the car would go 8.90's on this turbo at 160 or so.
Fun night at the track and left with everything in one piece.
My brother, Daniel, found that our turbo was damaged when it came off anyway, so it was a good thing we pulled it and probably part of the reason we haven't set the world on fire in our two only outings with the car. The turbine wheel was hitting the housing pretty hard.
Robert at Forced Performance sent me an HTA88, which is his new billet compressor wheel on a P-trim turbine wheel.
The turbo was as laggy as the GT42 and was down 250 whp. Not what I was hoping for. We had a smaller turbine housing shipped overnight to us and ran the car again today. Still not much better for spool up.
I put an HTA35r on the car next with a T4 housing and dyno'd the car again. Still not happy with the power or spool up we swapped the HTA88 back on the car and decided to give it a shot.
For reference the car only made 660 whp in 3rd gear on our dyno. Peak boost was only 42 psi.
First pass the tires spun bad. The car still managed a 9.4. Second pass the car bogged, two step was too low.
The third pass we finally got the two step close and Daniel was able to run a 9.24 at 148 mph. When he got back to the trailer he said the car didn't sound right and rather than finishing the run he lifted. We checked everything over and I checked the log, made some minor changes and then we waited 3 hours for our next pass..........
The last pass of the night the car spun hard again causing the suspension to unload and load again. It didn't look too hot. Ends up the pass was better than expected and ran a 9.3 at 158 mph.
Not enough passes to get anything sorted but it sure is a lot easier getting a car down the track with 250 less whp than we had.
I want to try and hit a track rental so we can do some real testing. Work on the suspension and get everything working together.
I'm pretty confident the car would go 8.90's on this turbo at 160 or so.
Fun night at the track and left with everything in one piece.
I think that the typical customer can relate more to the powre obtained with a typical mid frame turbo like the Gt37 HTA which is a very common turbo for many customers on the road, street driven.
Its great to see you guys pushing the limits of what mind of power / times can be had with one of those turbos.
Al
becuase the few who have set records with Gt42's have not run consistantly fast and have had a very unreliable experience
Since we are drag RACERS we want to build cars which can compete in and finish drag races and prove to be reliable and easy to drive fast
This is why a few people are playing with smaller turbos
Case in point David Buschur's BAD BISH RS (full weight Gt35HTA street car) which is as fast and quick as many Gt42 "race cars"
On a 2.0 L it seems that the TQ and area under the curve is just as important as peak power in making a fast drag car.
Al
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Congrats Dave keep at it.
David, Columbus Racing is having a track rental at D42 on Saturday the 26th. Only 30 cars so that should net plenty of runs. I am sure you could get in on it if your interested.
becuase the few who have set records with Gt42's have not run consistantly fast and have had a very unreliable experience
Since we are drag RACERS we want to build cars which can compete in and finish drag races and prove to be reliable and easy to drive fast
This is why a few people are playing with smaller turbos
Case in point David Buschur's BAD BISH RS (full weight Gt35HTA street car) which is as fast and quick as many Gt42 "race cars"
On a 2.0 L it seems that the TQ and area under the curve is just as important as peak power in making a fast drag car.
Al
Since we are drag RACERS we want to build cars which can compete in and finish drag races and prove to be reliable and easy to drive fast
This is why a few people are playing with smaller turbos
Case in point David Buschur's BAD BISH RS (full weight Gt35HTA street car) which is as fast and quick as many Gt42 "race cars"
On a 2.0 L it seems that the TQ and area under the curve is just as important as peak power in making a fast drag car.
Al
Understood but it is an all out drag car...who doesn't have problems?
In a case like yourself I can see why you downsized...
but Buschur already has his 'daily' car as well as his drag car. I'm sure the 42R will go back on later as he said.
I think until one of "you" on the outside attempts to build a drag car, make 1,000+ hp and get it down the track there is no way I can explain what a PITA it is most days.
We put the new suspension and 4 link in the car and have had it to the track only 3 times. First time ever was the shootout where it ran 8.89 at 165, something seemed wrong because the MPH was down. Next outing was Pinks where a brand new trans wouldn't show any signs of having 4th gear. The 3rd time left us all so mad the car sat in the car trailer for 3-4 weeks, then in the shop for another few weeks. Honestly, if it were up to me, I'd have sold it. The guys at the shop talked me out of it. Going to the track with this car is not fun most of the time.
We pulled the turbo off and everything looked good to me. (last time at the track it would only make 24 psi) Ends up I looked at it too fast and my brother saw that the turbine wheel had been grinding into the housing.
I made the decision to use a smaller turbo on the car to try and make it easier to drive and get down the track.
I can tell you, it's MUCH easier to get down the track now. Night and day difference. As a matter of fact the 9.2 pass is more inline with what a typical pass was from the car with a lot more power. Now the car can be launched, shifted and driven down the track almost effortlessly.
We need to get some passes in on the car so we can now try to dial in the suspension and get it to work. Once we've done that and can run the car consistently down the track we will be going back to the big turbo.
The results from testing multiple turbos with mulitple A/R turbine housings turned out to be quite a wealth of knowledge that I wasn't expecting to get. Very glad I did.
2highpsi, our black car can't run at D42, the track is too rough and the car is too hard to control there. My RS is the same story, although I was unaware of it until yesterday. So as far as either car goes, they will not be run at D42 anymore. It's too bad that track is such poor shape, you can actually go there and run a ton of runs in one night. Great for testing/practice.
We put the new suspension and 4 link in the car and have had it to the track only 3 times. First time ever was the shootout where it ran 8.89 at 165, something seemed wrong because the MPH was down. Next outing was Pinks where a brand new trans wouldn't show any signs of having 4th gear. The 3rd time left us all so mad the car sat in the car trailer for 3-4 weeks, then in the shop for another few weeks. Honestly, if it were up to me, I'd have sold it. The guys at the shop talked me out of it. Going to the track with this car is not fun most of the time.
We pulled the turbo off and everything looked good to me. (last time at the track it would only make 24 psi) Ends up I looked at it too fast and my brother saw that the turbine wheel had been grinding into the housing.
I made the decision to use a smaller turbo on the car to try and make it easier to drive and get down the track.
I can tell you, it's MUCH easier to get down the track now. Night and day difference. As a matter of fact the 9.2 pass is more inline with what a typical pass was from the car with a lot more power. Now the car can be launched, shifted and driven down the track almost effortlessly.
We need to get some passes in on the car so we can now try to dial in the suspension and get it to work. Once we've done that and can run the car consistently down the track we will be going back to the big turbo.
The results from testing multiple turbos with mulitple A/R turbine housings turned out to be quite a wealth of knowledge that I wasn't expecting to get. Very glad I did.
2highpsi, our black car can't run at D42, the track is too rough and the car is too hard to control there. My RS is the same story, although I was unaware of it until yesterday. So as far as either car goes, they will not be run at D42 anymore. It's too bad that track is such poor shape, you can actually go there and run a ton of runs in one night. Great for testing/practice.
