20G turbo upgrade from Buschur Racing.
Just got off the dyno. The car made the exact same power and torque as it did the other day. The curve is a little improved on the way up to 5200 but nothing to brag about. Basically it is making all it is going to make on 94 octane.
I am very impressed with the smoothness of this turbo. Stock, TME or the 20G-8 all experience surge on spool up on my car on the dyno. The TME being the worste of all. This turbo has no surging what-so-ever on the dyno, none.
Very happy with the outcome. The high boost actuator didn't do as much for the boost fall off up top as it did on the 20g-8 for some reason. Today the boost would hit around 24 and fall to 20. The other day it was hitting 25 and falling to 17. So it is much better. The gains at the top were not there. I moved the timing and AFR's all over the place and even with the improved boost level the power at 7,000 rpm stayed the same as the last graph I posted. I dropped the boost down to 22 peak and the power was still in the high 320's low 330's.
I have over a half a tank of fuel in the car now, as soon as I get time to either drain it or run it out (not likely it's snowing) I will fill it with race gas and try this again. I still hope to hit 400 but I think it's unlikely.
I am starting to think I might want to try an external wastegate with this turbo. I tried it awhile back with the stock turbo but it killed the low end. Might be a different story now.
Also, I have a GT Spec Header here that was sent in for us to test and I just built a new header myself. Plans are to do some testing on these two headers tomorrow. Looking forward to this. I was hoping to test one more but I don't think it is ever going to show up.
David Buschur
www.buschurracing.com
I am very impressed with the smoothness of this turbo. Stock, TME or the 20G-8 all experience surge on spool up on my car on the dyno. The TME being the worste of all. This turbo has no surging what-so-ever on the dyno, none.
Very happy with the outcome. The high boost actuator didn't do as much for the boost fall off up top as it did on the 20g-8 for some reason. Today the boost would hit around 24 and fall to 20. The other day it was hitting 25 and falling to 17. So it is much better. The gains at the top were not there. I moved the timing and AFR's all over the place and even with the improved boost level the power at 7,000 rpm stayed the same as the last graph I posted. I dropped the boost down to 22 peak and the power was still in the high 320's low 330's.
I have over a half a tank of fuel in the car now, as soon as I get time to either drain it or run it out (not likely it's snowing) I will fill it with race gas and try this again. I still hope to hit 400 but I think it's unlikely.
I am starting to think I might want to try an external wastegate with this turbo. I tried it awhile back with the stock turbo but it killed the low end. Might be a different story now.
Also, I have a GT Spec Header here that was sent in for us to test and I just built a new header myself. Plans are to do some testing on these two headers tomorrow. Looking forward to this. I was hoping to test one more but I don't think it is ever going to show up.
David Buschur
www.buschurracing.com
bump for info on the ported shroud, and is the one offered our core drilled (so to speak) so that would mean the 05's get a ported 10.5 comp. 
please someone buy and test this thing! not me, i hate being a guinea pig.
please someone buy and test this thing! not me, i hate being a guinea pig.
Richard,
The testing I had for the C&D event was done on our 2wd Dynojet. Not even close, and I have no sheets. The car is SO much faster now. To give you an idea. We went into the C&D event making about 380 whp/380 ft lbs on 94 octane on the stock turbo (our old 2wd Dynojet numbers) The best 1/4 mile time the car had was an 11.79 at 116 mph like this. At the C&D event the car ran a best of 11.9 at 116 mph.
Now the car has run 11.30 at 120 mph with only 328 whp on our MD, this was on race gas with the 20g-8 on the car.
The car is not making a very steady/consistent 330 whp on straight 94 octane. This puts the car in the same 11.3 at 120 mph speed range but on normal pump gas.
On race gas, as you guys have seen, the car made 379 whp and 396 ft lbs on our MD AWD dyno. This should be more than enough, with the right driver, to drop the car well into the 10's and have trap speeds in the 127 mph range. (Best mph at 330 whp has been 124 mph to date)
Ported shroud testing:
I have not gotten the ported shroud back yet, it is enroute. I would actually like to do the ported shroud 20g-8 testing on a car other than my own and do before and after testing with it and a flash. I have no desire to swap my turbo out again and there are many of you wanting results from something less built. We may use my brothers car or Jarrod's.
Header testing:
Started testing yesterday. We dyno'd my RS first thing in the morning and made 331 whp with the car, two pulls, within 2 whp of each other. The car has our ported and ceramic coated manifold on it, ported and ceramic coated 10.5 and 02 housing. Also with the 20g-9 turbo kit.
I then bolted on the GT Spec header and was suprised with the results. Testing against our ported/coated manifold the power was exactly the same as our ported coated manifold over 3900 rpm. Below that there was a very minor loss in power/torque. Keep in mind this is testing against a ported/ceramic coated manifold.
I am going to do our next test with a bone stock manifold on the car. This will give us a better idea of the gains with the GT Spec header/ported coated manifold. This is the best I have seen a header perform so far. Normally there is a lot of loss in the low/mid range.
Also, the GT Spec fit absolutely perfectly, slid the old manifold out and slid this one in. Took less than an hour to swap.
Hopefully Ken from GT Spec can chime in on pricing and such for those of you interested.
I will post more results of the gains over a stock manifold when I get the time to run the test.
The header I built did not go well. The header I built a year ago or so I must have decided to drop the collector down about 1.5". I didn't bother to look at the fixture I built and when we went to install the header I just built it did not fit. Pissed me off. Back to the drawing board....or maybe not.
I wish I had more takers for this challenge but GT Spec was the only company with the ***** to send something in. Good results, be better when I can produce stock manifold numbers to show.
Thanks,
David Buschur
www.buschurracing.com
The testing I had for the C&D event was done on our 2wd Dynojet. Not even close, and I have no sheets. The car is SO much faster now. To give you an idea. We went into the C&D event making about 380 whp/380 ft lbs on 94 octane on the stock turbo (our old 2wd Dynojet numbers) The best 1/4 mile time the car had was an 11.79 at 116 mph like this. At the C&D event the car ran a best of 11.9 at 116 mph.
Now the car has run 11.30 at 120 mph with only 328 whp on our MD, this was on race gas with the 20g-8 on the car.
The car is not making a very steady/consistent 330 whp on straight 94 octane. This puts the car in the same 11.3 at 120 mph speed range but on normal pump gas.
On race gas, as you guys have seen, the car made 379 whp and 396 ft lbs on our MD AWD dyno. This should be more than enough, with the right driver, to drop the car well into the 10's and have trap speeds in the 127 mph range. (Best mph at 330 whp has been 124 mph to date)
Ported shroud testing:
I have not gotten the ported shroud back yet, it is enroute. I would actually like to do the ported shroud 20g-8 testing on a car other than my own and do before and after testing with it and a flash. I have no desire to swap my turbo out again and there are many of you wanting results from something less built. We may use my brothers car or Jarrod's.
Header testing:
Started testing yesterday. We dyno'd my RS first thing in the morning and made 331 whp with the car, two pulls, within 2 whp of each other. The car has our ported and ceramic coated manifold on it, ported and ceramic coated 10.5 and 02 housing. Also with the 20g-9 turbo kit.
I then bolted on the GT Spec header and was suprised with the results. Testing against our ported/coated manifold the power was exactly the same as our ported coated manifold over 3900 rpm. Below that there was a very minor loss in power/torque. Keep in mind this is testing against a ported/ceramic coated manifold.
I am going to do our next test with a bone stock manifold on the car. This will give us a better idea of the gains with the GT Spec header/ported coated manifold. This is the best I have seen a header perform so far. Normally there is a lot of loss in the low/mid range.
Also, the GT Spec fit absolutely perfectly, slid the old manifold out and slid this one in. Took less than an hour to swap.
Hopefully Ken from GT Spec can chime in on pricing and such for those of you interested.
I will post more results of the gains over a stock manifold when I get the time to run the test.
The header I built did not go well. The header I built a year ago or so I must have decided to drop the collector down about 1.5". I didn't bother to look at the fixture I built and when we went to install the header I just built it did not fit. Pissed me off. Back to the drawing board....or maybe not.
I wish I had more takers for this challenge but GT Spec was the only company with the ***** to send something in. Good results, be better when I can produce stock manifold numbers to show.
Thanks,
David Buschur
www.buschurracing.com
Originally Posted by davidbuschur
I wish I had more takers for this challenge but GT Spec was the only company with the ***** to send something in. Good results, be better when I can produce stock manifold numbers to show.
Thanks,
David Buschur
www.buschurracing.com
Originally Posted by davidbuschur
I then bolted on the GT Spec header and was suprised with the results. Testing against our ported/coated manifold the power was exactly the same as our ported coated manifold over 3900 rpm. Below that there was a very minor loss in power/torque. Keep in mind this is testing against a ported/ceramic coated manifold.
I am going to do our next test with a bone stock manifold on the car. This will give us a better idea of the gains with the GT Spec header/ported coated manifold. This is the best I have seen a header perform so far. Normally there is a lot of loss in the low/mid range.
Also, the GT Spec fit absolutely perfectly, slid the old manifold out and slid this one in. Took less than an hour to swap.
Hopefully Ken from GT Spec can chime in on pricing and such for those of you interested.
I will post more results of the gains over a stock manifold when I get the time to run the test.
I am going to do our next test with a bone stock manifold on the car. This will give us a better idea of the gains with the GT Spec header/ported coated manifold. This is the best I have seen a header perform so far. Normally there is a lot of loss in the low/mid range.
Also, the GT Spec fit absolutely perfectly, slid the old manifold out and slid this one in. Took less than an hour to swap.
Hopefully Ken from GT Spec can chime in on pricing and such for those of you interested.
I will post more results of the gains over a stock manifold when I get the time to run the test.
There is not 21G, it would have to be something just built. The 20G wheel we used is a reversed copy of the Mitsubishi 20G wheel.
Yes, Matt55, it surely does make you wonder about the other headers! haha
The key in the headers is to find one without any losses down low.
David Buschur
www.buschurracing.com
Yes, Matt55, it surely does make you wonder about the other headers! haha
The key in the headers is to find one without any losses down low.
David Buschur
www.buschurracing.com