How did you not notice a 1/4" gap? How did Topspeed not notice? You and/or a professional shop would have noticed it immediately. I t would have been so loud and there would have been soot on everything under the hood. I would bet Topspeed would not have dynoed your car with a leak that large or at least informed you of the situation. It may have come loose after the dyno but I don't believe it was leaking on the dyno. It would have been too obvious.

 

You say that but it happened. I dont know how I didn't notice, to be honest it was probably due to the fact that the lower section of studs came through thicker on the lower part of my manifold than on the top, and that led me to believe it must of been tight/thinner down bottom and it wasn't an issue.

That's how I didn't notice, also all of my driving when from where I installed the turbo kit to topspeed I wasn't revving above 3500 rpms or going into boost so the sound obviously wasn't as pronounced as it would of been at higher rpms. Also i had just gone from a stock turbo to a 3076 so I had no idea what to expect in terms of noise.

Topspeed did not only dyno the car, but also installed some injectors while I was there and never noticed while working on it or while on the dyno. It was leaking on the dyno because when I went to check on the gap when the dealership notified me of what they found the nuts were still tight on the exhaust manifold studs.

The reason why the gap existed was because the turbo was contacting the block, not allowing the manifold to seat flat.

Whether or not you believe that I and Topspeed failed to notice it, thats exactly what happened, and it wasn't resolved until I took it into the good old stealer ship......

There have been threads in the past with regards to tuners tuning cars with exhaust leaks and in the last one I can think of which was a Vishnu guy out on the west coast Shiv went ahead with the tuning aswell, however in my case neither I not Doug was aware.

Scorke

 

so scorke, about my previous post, give me some feedback on your tq at 4000 rpms

 

I do not have the 2.0 dynosheets available, at 4000 rpms on pump gas I was making 310 ft lbs of tq, and 320 ft lbs on race gas, peak tq on race gas was 480 ft lbs at 4600 rpms, it climbs 150 ft lbs over 600 rpms on race gas.

Scorke

 

That graph you posted is my 2.0+exhaust leak graph, conveniently the only one SmokinJoe chose to reference for pump gas numbers, not my 2.3 ones where the leak was fixed.....

I still talk smack about ATP kits because they still suck. Have you seen any of the 10 threads that guy with the 35R ATP kit started? I'm not the only one that thinks they aren't good....


Scorke

 

ATP FTL

l8r)

 

so then i take it my results suck too right?

 

No yours are pretty damn good, along with smokingjoe I would say your one of 3-4 that have had decent results. I would be happy with peak power like yours, only issues I would have are the spoolup and wait for power/tq.

All the ATP kits make decent top end power, they just struggle down bottom. Your 395 whp on pump is dead on for what these turbos "should" make on pump gas, the tq /when you make it is a bit low, more fitting for a 35R 2.0 setup if you catch my drift.

If I was you for the money you spent I would be quite pleased, however like the bulk of us here none of us me included usually happy the first time around, thats why I am always broke

Scorke

 

well the 396whp was uncorrected if that makes a dif to anyone, and the tq isnt as bad as u think. i think it has a lot to do with how u port the hotside. there is a lot of unecessary material there that can be removed. i really want to get some c16 and crank up the boost but i have no where to get it around me. i think i can get some 112 octane, maybe i will get some and turn it up to like 28 psi. im thinking i should be at or above 450whp no problem. but im not doing that until i get my AEM ugeo so i can monitor my a/f.

btw, what 35r will u be going with? is it a kit?

 

Uncorrected shouldnt make a huge difference unless it was super humid and or hot out.

I think it has TONS to do with the hotside, however there is only so much you can fix via porting there is lots of material that you cannot attack, and the design of the ATP hotside is just flawed.

Dyno's usually dont lie, and your torque peaks almost at redline, that is RIDICULOUS for a turbo of the 3076's size, as I said mine peaked between 4200 and 4800 depending on racegas or pump gas on a 2.3, so call it 4800 to 5200 on a 2.0, and that should be about where it lies for most other people running 30R's.

The 35R setup I am going with is a hodgepodge, I will call it my own. It uses the HAFE cast manfiold and 02 dump, Tial 44mm wastegate, Garrett GT35R with a surge ported compressor cover and a .63 a/r hotside. Ill be happy with 440/370 ish on pump, 580/530 ish on race gas. The intercooler is a big Garrett core with endtanks I will design, the wastegate will be dumped.

Scorke

 

u must be mistakin because my tq hits hard at 4500-6300 then dies off. look again

 

Sorry horsepower Mine hp does not peak at 4500 but right around 6000. Sorry for the confusion.

Scorke

 

well mine was only takin to 7400 where as yours was takin to about 8500. so i think if they had pushed my car further, we would see the power level off or even dip

 

Correct, mine was taken just over 8k, still it should peak and drop off sooner.

Scorke

 

maybe u can clear something up for me. ok i just saw a video of that buschur 3065 running 93 pump gas and alky with only about 24psi peak. it was making 460 ish at "the shop". so my question is, whats the alky for if he is only running 24 psi? i mean is obv doing something if its making 460whp with 24 psi, but i thought all alky did was act as a higher octane so that u could crank up that boost. enlighten me.