I realized that 28PSi is out of efficiency for the stocker. But could you please let the 20G spike to 30 PSI? Or you are out of injector at this point?
For the love of evo's god, please show me what the 20G is like at 30 PSI spike :}

 

It would be nice to see graphs of a 20G vs. a WR vs. an '05 16G at similar boost levels. I wonder if the WR would have a similar boost hit in the low rpms while retaining a respectable showing vs. the 20G in the upper rpms. Maybe there's a car in SoCal that has a 20G with stock cams, TBE, HFC, and a FMIC to compare to my WR equipped car? I dunno, just lookinig for ideas so we can see something not running meth (which most of us aren't).

 

I respect what you're saying Doug, but what made this turbo attractive to me was the assertion that it improved high rpm power with low rpm power being at least as good (if not better) as the factory turbo. I spend 99.9% of my driving time on the street, with 95% of that time being spent at less than 5.5k rpm. I like the feel of a big midrange torque curve, and I damn sure wouldn't be satisfied if it dropped 60ft/lb at 4krpm for the sake of gaining 25hp at 7k rpm. If power above 5.5k rpm was all that concerned me, I'd install a GT series kit and get a LOT more power above 5.5k rpm.

I was considering this turbo slightly ahead of the WR as a viable upgrade, but the above chart has me troubled. I'm another one who would value a straight comparison between the factory turbo vs. the 20G with the same boost settings in the midrange.

 

Aww man, Ted, you made it sound so much better. :}

 

Did you guys miss the stock turbo went to 28 psi on those runs and the 20G was only 22-23 psi?

David Buschur
www.buschurracing.com

 

No, we (at least I) didn't. We are just asking for another run of the 20G at about the same Boost spike at the stock turbo's run. :}

 

Yes. We wanted to see similar boost levels.

 

here you go... stock turbo vs the BR20g. Both turbo's peaking at 25psi.

Run#3 is stock turbo 25psi tapper to 19psi
Run#5 is 20g turbo 25psi tapper to 22-23

 

I just posted a thread with my car and 20G graphs with a peak boost of 30 psi. It is under "two turbos two results".

My car on our dyno made 376 whp and 396 ft lbs of torque on its best pull. This is not a bonzai run, I had plenty of room left in timing and AFR's were in the mid 11's.

Peak HP was at 5,000 rpm and peak torque was at 4,500 rpm.

I realize I sell these 20G's and have a lot of time in them. They aren't without compromise as right now they have some surge issues and I have made that clear. This turbo is no GT35R, which is clear if you check out the other thread, it makes more power sooner.

Tomorrow I will look for the highest HP stock turbo I have here and compare the two charts for you guys.

My car at 22-23 psi has run 11.30 and a best MPH of 124. This is impressive I think.

With the boost where it is now and power where it is, I believe my car will run 10's at 127+ mph. We will see.

David Buschur
www.buschurracing.com

 

Ssccchwweeet!

 

This last comparison makes a big difference and is much better. The HP curves cross over much sooner, and there is much less area lost under the curve. My next question would be...why is the 20g not being boosted higher? Is it not supposed to, or is that just not tested yet?

 

Agreed. I'd still entertain an overlaying chart that shows what happens when the 20G is allowed to do its thing and run up to 30psi as quickly as physics allows.

 

Wow, thanks Doug. Huge difference in that last chart from the first. Having them both peak at the same 25 psi makes the 20G look even better than it did the first time you posted the charts.

BTW, for those of you on the fence about what you want to do for a turbo give me another 2 weeks and I should have some new test results with the current 20G vs. this new design. The new design very well could work better, I am expecting it to.

As for a few comments made. One was someone wanted to see the 20G make 450 whp on a Dynojet.......well I'd venture to guess my car is close, I figure over 440 dynojet.

Also, someone said something about they didn't know what all the hype is about this turbo being so much better than the WR. Nobody at our shop has made that type of hype or statement. We will prove how good this turbo is as time goes on though. Hell as far as I am concerned I already have.

BTW, anyone that owns an AWD Dynojet dyno sheet for their car and has made 400 whp on the stock turbo, I'd dyno your car for free here, just to see what it will make.

David Buschur
www.buschurracing.com

 

What is the difference between spooling 20g and Tme 20g.Is ıt worth to buy Tme?

 

I'd be interested to see the boost curve for the 20G. The power seems to be falling off on the top end and I'm wondering whether that is conservative tuning or the boost tapering. I understand boost taper after the initial spike, but I would have expected the boost to taper only a bit on the top end after that initial taper from the spike.