x2

 

What would he be running then, like 5lbs of boost. 250whp is pretty easy to come by.

 

that car is never going to blow.

 

which gt turbo is he using btw? all of them seem overkill for 250

 

It's 5ish controlled by the AEM EMS via solenoid and tuned by Shawn Church.

 

I guessed it... 5lbs....man damn thing will run for eternity and still be quick enough for the class... They are going to have to write a new rule after DG keeps whooping up on the competition even harder now that they are pushing the Dezod setup.

 

GT30X

 

That was the point.

Fuel economy over the S/C was a HUGE improvement as well per Dan.

 

I imagine so. Fewer fueling pit stops, unless it's manditory pitting per the rules. I wonder what class I would fall in.

 

30R? wow thats big why didnt they go with the GTX3071?

 

They did. GTX30.

 

oh i thought it was the 3076 that was the 30R

 

30R family includes the 71 and 76

 

Doesn't that 30R make it safer too, compared to say a 20G? It doesn't have to run as much boost to make the power, so isn't there less heat?

Either way, that sounds like the perfect reliable setup. hmmmmm...

 

The turbo selection has a certain amount of threshold to the safety of the engine due to the fact of sizing of the turbo should match the engines flow. In other words, if the turbo is sized right for the engine and what it will be used for, then the efficiency of the turbocharger rises, which makes the charge temps easier to cool, therefore less prone to detonate.

The biggest determining factors to reliability on a turbocharged car are tuning and your up-keep on the setup.

 

BTW, I have details for any S/C owners whom are interested in a completely custom S/C IC kit that was used for the DG Spec cars. They are now for sale! PM me for details.

 

And at these low boost levels, heat isn't going to be drastically different with a 20G compared to a GT30, if any difference at all.

 

Not necessarily Travis. Efficiency outlet of one turbo is going to be different of charge temp efficiency outlet of another smaller turbo. Compressor map and air flow comparison will show only part of the picture.

 

Perhaps I should have phrased it in terms of "reliability". Temp might be different at even low boost levels, but i don't think it's going to increase your reliability by some measurable degree if they were running a smaller turbo vs medium-large sized turbo at low boost.

At the same time though, smaller turbo is going to be more "peaky" and not as ideal for a road race condition. Peak torque will be in the lower rpms and when it hits, it will be a little more to deal with in regards to maintaining traction in and out of corners. The medium-large turbo doesn't have this problem so much, since the peak torque is higher in the RPM's and can produce a flatter torque curve. That tq curve aids in maintaining traction in a road race environment.

Road racing, you want the power to have an even pull all the way to redline rather than one that just "BAM" hits you, causing wheel spin and torque steer when you step on the gas (even though it seems like more fun..lol).

 

yea the only reason I thought about it was because I came from the Subaru community, and their motors are VERRRY sensitive-- knock at all and its goodbye cyl #4.. they have said that because they can push the stock turbo so hard, all it does is blow hot air (still makes strong power) and is wayyy more prone to detonation than say a 20g making the same power but lower boost.

A few very knowledgeable folks over on Nasioc have said pretty much exactly what Paul just said. It may not necessarily increase reliability per say, but a cooler charge is always safer..