Dyno Tested Buschur Racing's 20g
Originally Posted by davidbuschur
LHB,
Very well put, my opinions exactly.
Take my brother's EVO for example. He owns my original EVO, the 2003.
Desciption of the car:
Stage 3 2 liter engine
Stage 3 head
Stages 1-4, with 280 cams, race FMIC.
AEM EMS
Our GT35R turbo kit, with a short runner header I built and HKS external wastegate.
Race fuel and 30 psi of boost, that's a flat 30 psi from the time it hits to 8500 rpm where he shifts.
A few weeks ago he ran the car at the NOPI race. He was unable to launch the car, it either bogged or spun. His best time at that race was 11.00 at 135 mph. Again, to his credit the car would not launch.
To put this into perspective (this is all I am trying to do). My RS with the 20G and 20 psi ran 11.4 at 121 mph, also on race gas.
The MPH difference is huge, the ET is not though.
Power on my 20G that day would have been in the 320 whp range while his car was about 510 whp.
David Buschur
www.buschurracing.com
Very well put, my opinions exactly.
Take my brother's EVO for example. He owns my original EVO, the 2003.
Desciption of the car:
Stage 3 2 liter engine
Stage 3 head
Stages 1-4, with 280 cams, race FMIC.
AEM EMS
Our GT35R turbo kit, with a short runner header I built and HKS external wastegate.
Race fuel and 30 psi of boost, that's a flat 30 psi from the time it hits to 8500 rpm where he shifts.
A few weeks ago he ran the car at the NOPI race. He was unable to launch the car, it either bogged or spun. His best time at that race was 11.00 at 135 mph. Again, to his credit the car would not launch.
To put this into perspective (this is all I am trying to do). My RS with the 20G and 20 psi ran 11.4 at 121 mph, also on race gas.
The MPH difference is huge, the ET is not though.
Power on my 20G that day would have been in the 320 whp range while his car was about 510 whp.
David Buschur
www.buschurracing.com
Originally Posted by BadazzCR
The reason the tq is lower on the 20g was from the fact that the stock turbo was run to 28 psi tappering to 19-20psi, and the 20g only had to run 25psi in the middle and held 22-23psi through redline. IMHO the loss of TQ down low is not even noticed on the street, since most of the time your racing the rpms are above 5.5k where this turbo (20g) makes more power.
To those who say the gains aren't that great, I beg to differ. Here you have a bolt on turbo that spools a bit slower than stock.. and nets 20-30hp gains over an 05MR turbo. I would bet if you put this turbo up against a stock 03 Evo turbo you would see gains around 40hp up top.
To those who say the gains aren't that great, I beg to differ. Here you have a bolt on turbo that spools a bit slower than stock.. and nets 20-30hp gains over an 05MR turbo. I would bet if you put this turbo up against a stock 03 Evo turbo you would see gains around 40hp up top.
Originally Posted by davidbuschur
My car at 22-23 psi has run 11.30 and a best MPH of 124. This is impressive I think.
www.buschurracing.com
www.buschurracing.com
Originally Posted by DynoFlash
A 20G with a stcoker block would spool faster and harder then stock and pull the same whp or slightly more up top - possibly the ultimate combo ?
Gotta make sure I can hang with the new Z06 
Originally Posted by DynoFlash
A 20G with a stcoker block would spool faster and harder then stock and pull the same whp or slightly more up top - possibly the ultimate combo ?
But I personally feel that its the perfect combo. I've made a few other "Efficiency" upgrades specific to this end-state though.. I guess time will tell if its a good combo or not..
Hmmm, we have a GT3071 turbo kit. This is a very good turbo that doesn't surge much. The turbine wheel in it is quite a bit larger than the TD05H turbine wheel used in the stock turbo/20G. The compressor wheel, although I haven't measured it, looking into the end of the compressor housing on both turbos is very close to the same size. The compressor cover on the GT3071 is larger.
I have recently finished a build on a car and used our GT3071 kit on the car. On 94 w/alky injection and the boost up around 27-28 psi the car made 351 whp. The boost on the GT3071 also fell off in the upper RPM's, as would be expected as it is not a large turbo.
I am sure on race gas I could have made the same 376 whp my 20G just did and maybe slightly more, maybe. The turbo kit is $2995. I am sure there is someone that is going to tell me they can build a kit themselves for $1.99. Fact is we have one of the nicest turbo kits out there and the lowest cost, so I am using this for comparisons sake.
The 20G can be had with the 10.5 housing for $1150, using your stock core and buying a new turbine housing. Both turbos will need injectors.
EFIxMR,
I don't agree with your "tune" theory. Let me explain. If a guy has a stock turbo, 20G or a huge GT turbo he is going to want the most power from any of those that he can get. The timing you can run with the larger turbos is usually even higher than you can with the smaller. Had you simply said, "I prefer the GT turbo as you can make the same power as a smaller turbo with a less aggressive tune." I would agree. In other words you might hit a peak of 340 whp with a really tweaked stock turbo while with a GT35R you could do it with a much less aggressive tune. Who cares, as nobody with a GT35R wants 340 whp. See what I mean?
The larger turbine wheel and more efficient compressor wheel will allow you to run more ignition timing, generally.
Also, my 20G combination that just made 376 hp had a peak timing of 18 degrees, this is quite a bit less than the GT35R car of my brothers that I also tuned and have been using for an example.
David Buschur
www.buschurracing.com
I have recently finished a build on a car and used our GT3071 kit on the car. On 94 w/alky injection and the boost up around 27-28 psi the car made 351 whp. The boost on the GT3071 also fell off in the upper RPM's, as would be expected as it is not a large turbo.
I am sure on race gas I could have made the same 376 whp my 20G just did and maybe slightly more, maybe. The turbo kit is $2995. I am sure there is someone that is going to tell me they can build a kit themselves for $1.99. Fact is we have one of the nicest turbo kits out there and the lowest cost, so I am using this for comparisons sake.
The 20G can be had with the 10.5 housing for $1150, using your stock core and buying a new turbine housing. Both turbos will need injectors.
EFIxMR,
I don't agree with your "tune" theory. Let me explain. If a guy has a stock turbo, 20G or a huge GT turbo he is going to want the most power from any of those that he can get. The timing you can run with the larger turbos is usually even higher than you can with the smaller. Had you simply said, "I prefer the GT turbo as you can make the same power as a smaller turbo with a less aggressive tune." I would agree. In other words you might hit a peak of 340 whp with a really tweaked stock turbo while with a GT35R you could do it with a much less aggressive tune. Who cares, as nobody with a GT35R wants 340 whp. See what I mean?
The larger turbine wheel and more efficient compressor wheel will allow you to run more ignition timing, generally.
Also, my 20G combination that just made 376 hp had a peak timing of 18 degrees, this is quite a bit less than the GT35R car of my brothers that I also tuned and have been using for an example.
David Buschur
www.buschurracing.com
trinydex,
I checked it out and I am not impressed. Those guys are on crack to say they have the best turbo. That dyno, more than likely, does not measure lower HP numbers than ours.
450 whp, yeah so what? 360 ft lbs of torque? Double so what! haha
My car with the 20G made 376 hp and did it before 5,000 rpm, they didn't hit peak until 7500 rpm. My car with the 20G made 396 ft lbs of torque with a curve that doesn't look much different than their torque curve.
Sorry, no impressed.
David Buschur
www.buschurracing.com
I checked it out and I am not impressed. Those guys are on crack to say they have the best turbo. That dyno, more than likely, does not measure lower HP numbers than ours.
450 whp, yeah so what? 360 ft lbs of torque? Double so what! haha
My car with the 20G made 376 hp and did it before 5,000 rpm, they didn't hit peak until 7500 rpm. My car with the 20G made 396 ft lbs of torque with a curve that doesn't look much different than their torque curve.
Sorry, no impressed.
David Buschur
www.buschurracing.com
Took the RS apart today, mocked up what I needed to for the GT35R kits. The car is waiting on our ceramic coated pieces to come in. Next week the new 20G will go on. I will test it hopefully sometime between Nov 7th and 10th.
David Buschur
www.buschurracing.com
David Buschur
www.buschurracing.com
Originally Posted by davidbuschur
Took the RS apart today, mocked up what I needed to for the GT35R kits. The car is waiting on our ceramic coated pieces to come in. Next week the new 20G will go on. I will test it hopefully sometime between Nov 7th and 10th.
David Buschur
www.buschurracing.com
David Buschur
www.buschurracing.com
Looking forward to the results
. I'll be in line next year to have one put on Dave 
it would be nice to get some number off a average evo with a 20g no built block, no head work just a average evo with the normal bolt ons.... numbers on pump and meth
I am a dyno sheet away from ordering
I am a dyno sheet away from ordering
