bhvrdr

I was conducting testing on my car last year and came to a conclusion that it appears many others are now seeing. Many people who add testpipe and exhaust on STOCK programming have seen HUGE gains so we know gains can be seen there and it has little to do with programming.

EXAMPLE OF THIS:

Stock programmed 2.0T FSI car run baselined and with testpipe only added....

<img src="http://ecodetuning.com/shop/images/staticimages/a4tp/dyno.jpg">

But,

when people add perf software and then an exhaust and testpipe very little gains are seen. I suspect this is because a very well tuned program is pushing the max fueling by itself. APR and other companies will have a fuel pump and other options available.


EXAMPLES:

Stock programmed vehicle baseline versus dyno of same vehicle with APR software...

<img src="http://www.mjbmotorsport.com/sitebuildercontent/sitebuilderpictures/Stock-APRDyno-1.jpg">

Now take this same vehicle and add a full 2.75" exhaust with straight through mufflers. Very little if any gains are seen. In fact an insignifican 1 hp is lost with adding this exhaust...

<img src="http://www.mjbmotorsport.com/sitebuildercontent/sitebuilderpictures/APR-NS-Comparison-1-med.jpg">

Now, lets even add a very high quality 200cpsi Milltek/HJS high flow catalytic converter to this same vehicle...

<img src="http://www.mjbmotorsport.com/sitebuildercontent/sitebuilderpictures/DynoNSMilltek-1.jpg">

Again, a loss of about 1hp and a gain of about 1tq compared to this car with only programming on it. There has to be another variable.

Currently APR is taking advantage (and has been for a year) of adding fuel pressure. There are programs available running 125bar or so instead of the stock 110bar of fuel pressure. This has a benefit of running the car closer to its window of fuel spray. This is an advanced technique that many other companies are not taking advantage of. Still, it is not enough.

APR has also developed a high pressure fuel pump that will come fully assembled and bench tested. I spoke with them over a year ago when they were considering different fueling options and an idea they had been testing was a retrofit for OEM pumps. They abandoned this idea due to research into the high pressure fuel pump tolerances and handling safeties. They will not allow a customer to take on the risk of modifying a part that sees 1600psi of pressure and if failed could cause major compoenent failure. So they have taken on the burden to have pump made from the OEM pumps and fully assembled in the appropriate clean room conditions and also bench testing each and every unit prior to shipment. Keep an eye out for these options...<ul><li><a href="http://www.mjbmotorsport.com/fsifuel.html">http://www.mjbmotorsport.com/fsifuel.html</a</li></ul>

TJHUB

Mike, hands down you are the greatest. Seriously, what would we do without you?

Tgr_Clw

2nd.

initialA4

So basically test pipe doesnt do anything?

Tgr_Clw

Yes something like that.

killahb36

3rd very cool info

bhvrdr

but yeah, it seems it doesnt add a crapload on cars already programmed to their limits. I dont want to spread rumors but I would not be surprised of folks with full exhaust and programming see an additional 10hp/15-20tq gains using the not yet released APR fuel pump and corresponding fuel pump programming. This is a best guess and not any kind of direct word from APR although they did estimate at least those gains for the FWD 2.0T FSI cars on vwvortex.

bhvrdr

but hopefully it is food for thought and I really think we'll see if i'm right soon enough with the multitude of pump and injector options we will be seeing over the next year coming available.

lnferno

Per Keith, it should be shipping no later by the end of August. You can certainly count on new dyno's after I get that sucker on!

bhvrdr

Sweet Dante! Can't wait to see how it goes.