My mind was running wild this weekend about the 20G, stock turbo, GT35r's etc.

I was thinking about a car that came in and made some good power, around 450 whp. I left about the same time the customer did in his car, with my car making around 330 whp. We rolled out of town and both hit the gas at the same time, I left him. We didn't run more than maybe 3rd gear and into 4th for an instant. I figured he didn't try. Few days later I hear from him and he says, "Dude, that car of yours is insane, what kind of power did it make?!" I told him and he just didn't understand it. Granted had the race been longer it would have been another story.

Anyway, I start thinking that I saw something in the dyno that would measure "time" on a dyno pull. Then I got to thinking about how many times I have been asked what turbo would win from a roll on the street.

This morning I came in and started doing some comparisons. What I found was extremely interesting.

I cannot lay the runs over top of each other by time, I wish I could as I'd love to show this. You guys will have to settle for the raw numbers.

My RS with the 20g-9 on made 331 whp and it ran from 3,000 rpm to 7,000 rpm on the dyno, on pump gas in 3.77 seconds.

A customers car with Stage 4, sheetmetal intake manifold, pump gas+alky, steady 25 psi of boost to redline and a GT35R made 365.2 whp and ran from 3,000 rpm to 7,000 rpm in 5.91 seconds.

Wow, that is a pretty substantial difference. 2.14 seconds faster from 3,000 rpm to 7,000 rpm in 3rd gear. No need to tell you which car would have won this race from a roll, atleast in 3rd gear. That explains the other race. The lag is a killer from down low.

Granted if you put both these cars into a lower gear so the GT35R would be at a higher starting RPM it could change everything. I just found this interesting.

Enjoy.

David Buschur
www.buschurracing.com

 

Yea on the street there are so many variables and for most of the time stocker type turbos are awesome as they always have power, the bigger turbos aren't the best for the streets, they are more for parkway type situations. My buddy's gt30r is not really a race from light to light but once on the parkway its a differnt story especially once you start running through 4th. This new 20g 9 seems to be promising can't wait for some trap speeds. I wonder what the times would be like if you did lets say a 5k to 7800.

 

Dave,


That is sweet man, awesome info for everyone that has asked this question over and over again.

 

Makes sense,

at what hp level do you start to do 4th gear pulls?

 

David whos Gt35 was it.

 

It is funny you mention that situation Dave. We raced ProccoEvo 717whp GT35 on the street and had him 2nd, 3rd and much of 4th. Once the turbo spooled it would pull away to 9000rpms though in the 5sp's longer 4th.

I too thought he wasn't trying, but you really have to be winding high rpm in the 2.0L to have a chance on a short burst run with a big turbo.

 

Yea stocker based turbos just don't breath like gt35rs do up top, on a parkway run with the gt35r being spooled it won't be much of a race.

 

David - Correct me if I am wrong, but your black shop Evo has your stage 4 kit, Plus headwork, 2.25 stroker and your 35R kit. Any numbers on that car to compare against.

It would be interesting to see how much the stroker kit helps.

 

If the driver with the 35r knows how to boost brake it will destroy a 20g or stockish turbo from a roll. I had to learn this technique racing the likes of LS1s and pullied Cobras from a roll. Never had a problem staying with them early and pullin at the top of 3rd and killing them in 4th. The cars in question had 400whp+ and more tq than any stock turboished Evo.

 

Good point. Also keep in mind that being in the right gear is key (which 3rd would not be for the 35r car in this case) and that launch control can be used from a roll

Louis

 

boost brake?

 

sounds like something similar to Left foot braking

 

I can get a run of the black car and compare it later.

IE EVO, I had an LS1, was quite proud of how fast it was and the development work I did. At the time it was always faster than other LS1's equipped the same. The reason I am saying this is don't be so sure on the torque of a stock turbo'd EVO. My LS1 on our old 2wd Dynojet didn't make as much torque as my RS does now on our MD and the MD is a lot lower. Don't get me wrong, the LS1 is one bad engine, I should have kept that car!

David Buschur
www.buschurracing.com

 

brake boost...not boost brake...Hold the brake and pressing the gas at the same time to create boost and then letting off the brake when roll racing.

 

I am not underating the TQ on Evos but a cammed LS1 with 100+ shot has to have a lil more TQ than an Evo.