any idea when we can get the upgrades?

 

Is trapping over 120 even attainable on the stock head? At what point is that going to be a necessity?

 

I know of someone trapping 128+ and in the 10's with stock head

 

this is all fine and dandy but what i want to know is what typical gains will be from the stock to the 20g

 

Hey mr 1 post wonder , where are you logs for the other post talking about GT35r spoolup times that you foolishly claim. Let me remind oyu about the post here.
https://www.evolutionm.net/forums/sh...3&page=4&pp=15


Here you are saying that David is falsifying his information on his #'s, come on man Get Real. Show us what YOU can do on the stock turbo on the EVO8 so we can all see what you have done on it.

 

First page answers:

drewwrx,
The turbo on my car is a normal 2003 turbo, clipped with the 20G wheel and the 10.5 turbine housing from a 2005.

dragnracing,
I don't have my laptop here to give you an exact number for the spool up. It IS laggier than stock, but not by enough to make it noticeable. The power is more linear instead of that hard instant hit a really tweaked stock turbo combination makes.

compjoc,
The difference between the '03 style turbo and the ti/al wheel would be the ti/al wheel will spool up faster.

PVD04,
Our normal fuel pump upgrade is fine for the turbo and a set of 680 cc injectors will also be enough. In my car the 550's would not work, in a car in a lower state of tune and power they would probably still work. We sell the pump/injectors in our Stage 4 kit.

iceman,
Spool up as I say is a little slower than stock but not much. Better than even the smallest GT30 or any other turbo kit I have driven, by far. Also do not have any CFM ratings on the wheel. The old 20G wheel was suppose to flow 650cfm, since this is basically a reversed copy of it I can only guess it is close to that.

Thanks for the questions. Onto page 2

David Buschur
www.buschurracing.com

 

Dave have you gotten rid of ALL surge issues with this new design?

 

The turbo pricing is clear and listed in the first paragraph I posted on page 1.

I sent out 4 turbos this morning to have modified into 20G's. Turn around time for a turbo if you send in your core will be fast as soon as I get these cores built. I'll have them on the shelf.

wideband,
I was actually guessing that I added about 15% more fuel. I didn't use the calculate function on the AEM and just type in 15%, I added the fuel a few clicks at a time until it was back where I wanted it. The point was the AFR's changed 1 full point.

Not sure the point of the other questions about the car running 11.7 at 116 on pump and now 11.3 at 120 on race gas. I put up exactly what the story is in the first post with ever bit of information I could think of.

David Buschur
www.buschurracing.com

 

The stock head I am absolutely sure could go DEEP into the 10's. The stock head you have to remember is a great part. Going well over 120 mph on the stock head would not be a problem. That was my point in my opening paragraph. The head/shortblock I do not believe helped the combination at all.

Look, I am honest in my posts, put up the real information. I don't honestly like being questioned on things. The information I post is what it is. I haven't tested the turbo on any other cars except mine. It will get done but it will get done as we sell them and guys bring the cars here. If I wasn't confident in this design I wouldn't be ready to sell them, I didn't sell the other 10 wheels we tried that sucked.

Compressor surge. The first day I drove the car the car had a slight surge in it at about 5,000 rpm for an instant. It has not done it since. Which makes me wonder if I have a boost leak, I have to check today. The GT30's and GT35's have surge issues for sure, atleast in many applications.

David Buschur
www.buschurracing.com

 

Thanks Dave, I appreciate your honesty. Please let us know if you did have a boost leak.

 

First, I am in NO way suggesting or supporting the idea that anything has been misrepresented in any manner at all. I find your testing to be upfront and 100% refreshing to follow. Thanks for keeping everything so open to these forums.

That said, I suspect the question was around the difference of using pump and race gas on the old turbo versus the new 20G. I "guess" he was saying that if you had run the old turbo on race gas and it had been 11.7 @ 116 versus the 20G on race gas running the 11.3 @120 it would seem more relevant as it seems possible that the old turbo could have run a 0.04 sec / 4mph difference on the higher octane fuel.

Again, I am no expert and I am not implying anything here.

Chris

 

cdavy,

That could quite possibly be what was meant but I think I covered that fact in the first paragraph.

I am absolutely positive that the stock turbo could have run FASTER than an 11.30 at 120 mph on race gas, I am sure of it. BUT the difference would have been that the stock turbo would have seen peak boost levels in excess of 30 psi and then fallen off to 18-20 psi by redline.

The great part about running this 20G turbo is the boost was 21.6 psi in 1st gear, 22-21.6 psi in 2nd gear, 22.99-21.6 in 3rd gear and 24.5-22.72 in 4th gear. The boost was very stable and that makes for an easy car to tune and re-produce the numbers I am making safely. In otherwords I wasn't running the turbo for every thing it was worth.

This turbo has more left in it instead of being completely maxed out. I highly expect to see 10 second time slips from this turbo on race gas. Which means we could see 11.50's in many cars on pump gas.

David Buschur
www.buschurracing.com

 

David,

Thanks for your great response, it makes total sence. I look forward to this turbo! I have your FMIC and am working on getting my cams installed along with a new clutch...... I am sure a 20G is coming when I am ready for it.

Thanks again,

Chris

 

I'd be happy just to see this turbo run on anything BUT engine management. I want to know how feasable it is for me.

Eventually I want EMS, but 2k to spend right now when I only have basic bolt ons is no good imo.

 

DAMN I MISS THE 4BANGR ........ Have not slammed through the gears in 11 months.....I pity the next car I drive