Every ATP kit that any of us have tuned at Dyno4mance was appreciably lower (like 25whp pump and 50whp race) than an identical turbo with the Garrett hotside. Of course these are all Evo VIIIs, but after seeing compelling evidence time and again that the ATPs are lower in power output, I regard this as a really strong car or that the porting really helped. Probably both.

 

It could be the combination of the porting and the header. I also found that the wastegate bolts - from ATP (mounts) and from Tial were loose (all of them).

I love to see someone port their ATP housing and retune.

 

Me too, definitely! I think it could be a simple install alternative to other kits out there that makes just as much (or more in your case) power.

I wish I had a Wednesday car like you!

Actually, I just wish I had an IX.

 

ehhh come on Seth, so now its a strong car??? 100WHP stronger car??

The truth is that Joe did the following to help this turbo

1- Ported the turbo hot side (which is very simple job)
2- Installed the headers and took his time perfecting everything
3- Had a good tuner who was not biased against other manufacture parts.

That’s all to it. We don’t have a Ginny car nor do we have miracles.

Also, his tuner ran his car on the dyno atleast 26 runs. not 3 or 4 runs max

 

Andrew and I have both tuned a few ATP cars. We've also tuned AMS kits, Fullrace kits, etc, and the ATP kits were always lower. Sorry man, that's just the case we've seen too.

I'm not denying that SmokinJoe made those numbers, nor that the porting and the header helped. But he might have a strong car too!

Also, don't bother comparing DD numbers to Dynojet numbers. Surely you know better.

 

...

 

I'll be looking you up next year for some of those Track Events you're connected to

 

Will do, Zeus!

 

Come on guys. Let's not turn this into a stupid pissing contest. Most of us know the "history" hear, so let's keep focused on the ATP kit and not get side tracked.

I think what is important to gain from this thread is that common wisdom is probably wrong on the ATP kits. They are capable of making good power and a viable option for someone that needs a stock appearing upgrade.

I think another important thing Joe touched on is maximizing all the different pieces to the puzzle to make the most of what you have. It is obvious there is a great deal to be gained (performance wise, not necessarily peak whp wise) playing with the cams. Throw in the port job and his header selection and look at the results.

As one who has never been a big fan of the ATP kit, I must admit that I am very impressed. Thanks to Joe for all the work.

 

Nice job getting back on point. Thank you!


Is anyone with an ATP kit willing to port their housing and share the results in a before/after format? This will go a long way in proving if the housing is restrictive - And possibly ATP would consider a change to the casting if we show they are solid performance gains to be had.

I know for fact they are following this thread.

I'd be happy to explain to that person how I did the porting - total cost, rotozip and all - $115. And its really very easy.

 

I am having my install shop port my ATP exhaust side housing as we speak. I have a 2.3 and racehead along with the HKS 272/280 cams. I will post my results when I get the car back from the shop.

 

Great! I cant wait to see the before/after results

 

Count me in. I have the ATP 3037 .82 A/R and a Megan header. Finally fixed a wastegate problem and will hopefully have the car re-tuned in the next few weeks (either myself or a pro tuner, depending on $$). I'd be happy to get it tuned on the dyno, port the hotside, then return to the dyno. PM me on the porting please.

 

The Buschur requires you to use thier intercooler.

 

the intake cam is larger