Unlimited budget, most power is going to be the GT35r, stroker engine. This combination requires race gas to make a ton of power.

I admit, I tune on the conservative side, except for maybe my own car. I never want to blow up a customer car, ever. I haven't blown up ANYTHING yet.

There are guys who have claimed this and that on big turbos and pump gas or pump with Alky and personally I don't believe the claims are safe enough to give to a customer to duplicate.

The GT35R and GT30R will without a doubt make more power than the stock turbo and the 20G upgrade. Problem is at what cost do they do this? The lowrange, midrange and even into the start of the upper RPM's are absolutely DOMINATED by the stock turbo.

Guys, I sell turbo kits, good quality, high HP producing turbo kits. I sell them at a reasonable cost and have invested a BUNCH of money in our castings for our manifolds. I honestly cannot sell a big turbo to a guy that is going to primarily run his car on pump gas and do it feeling good about it.

The stock turbo kicks that much ***. 11.7 at 116 mph on 94 octane, that was my RS. Curt ran 10.9 at 124 mph on the stock turbo on race gas. I gaurantee you my car with good tires and race gas would be very close to that same 10 second time with the right driver in it. Curt is exceptional, he had a 1.53 sixty foot time and shifts with the gas flat to the floor. The guy can drive, but the point is the stock turbo is VERY good.

The stock turbo makes 100-150 whp MORE than the GT30 and GT35R in the low and midrange. The GT30 and 35 will not pass the stock turbo until about 6,000-6,500 rpm on pump gas. I am not kidding, it is that drastic we have dyno'd them back to back on the same cars.

Now you put one of them on straight race gas so you can really work the tune and they will still give up a ton but at that same 6,000 rpm where they barely caught up before they will not KILL the stock turbo. Stock turbo will go to a flat line of say 390 whp at 5,000 rpm and carry that to 7500. The GT35r will easily sail past 600 whp and make that by 7500, ON RACE GAS.

I can't tell you how to build your car. I do ask you, what are you doing with the car primarily? Pump gas and alky. What about driving it? Work and play? What type of competition?

This new 20G that I have to test, if it works out is going to be great middle of the road turbo. With higher boost levels, race gas or alky I think it is going to be killer. It should be close to the stock turbo for spool up too. This turbo should be good for an additional 40-50 whp over the stock turbo maxed out. So 440-450 whp with a maxed out 20G, with good spool up though.

Just some thoughts. Keep in mind most people do not think a laggy car is fun to drive on a daily basis. I know I don't care for them. Hey, if that's what you want I can build the engine and ship the turbo kit ASAP!

David Buschur
www.buschurracing.com

 

thank you so much for your post Mr. Buschur, im looking for the best set up for 91octane and alky. as for the mid and low range power, i figured that the stroker kit would take care of that. just like everyone else, im not looking to spend money on something that does not fit my needs, which is why i made this thread. im just looking to create a pump gas/Alky
monster that can give them v8s a run for their money. the car is my daily driver as there are no race tracks around where i live. ive also came across a few others on the board that are in the same sitation as myself, which is why i think it would be very helpful and appreciated if you could provide your insight in this type of situation, due to the fact that not everyone can get or run on race gas all the time.

 

Dave ,

Just remember that i am first on your list to get one of these shipped to florida .

 

Dave, can you compare what you hope to achieve with the 20G to what you already have achieved with the BR440 kit? Isn't the BR440 a set up with close to stock spool and about 40-50 more whp than the stock turbo?

 

If everything works out as he anticipates, Dave is going to make the BR440 obsolete by giving us a turbo with the same performance at a MUCH lower cost.

Keith

 

That would be very ironic considering that the BR440 was originally the budget replacement for the 20G.

 

I would suggest # 1 above with the GT3076 R as the BR 500 turbo of choice

 

thank you so much for the reply, just out of curiosity, what kind of numbers have you produced from this kit on other cars? what is your opinion on this turbo for 91 octane and alky? any ballpark figures as for hp and tq on my set up with the flash and alky? once again thanks for the post.

 

Your 350whp number seems really high for 91 oct and Colorado elevation.

 

Yeah, i was surprised also. The car was Dynoed and tuned at MAC Autosport on a warm day too, i think it was like 85 degrees or more in the dyno. Its one of the smoothest curves i've seen, great job by the guys at MAC!

 

Doesn't your car make crazy enough power as it is right now? Although, that video up a couple days ago with the 2.3 stroker and gt35r was really impressive...but thats a lot of money, is that the kind of money your working with?

 

The MAC dyno uses a correction factor of ~1.25+, which is IMHO way too high, hence your relatively high dyno numbers. FWIW, my car dynoed at 317whp on that dyno running 91 Octane, camgears, 3" exhaust and a Walbro. Then, a month later, running on a 93 Octane tune and 272 cams I dynoed at 286whp in Chicago ... go figure.

l8r)

 

3) 2.3 stroker w/ gt35r and mods above plus at least 272's maybe 280's

 

You guys think TwstDevo's numbers are high, you should check out Silvercar's numbers. I think Silvercars numbers are 370awhp/389tq. I'm not sure if he's stage 4 level yet.

 

You gotta love how some of these dyno's are "calibrated" or should we say "not calibrated"....