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Two Precision journal bearing 5857 turbos. 60 trim, .63 a/r, upgraded t-31 wheel. These turbos have internal wastegate 5 bolt housings on them. In lieu of the Ford 5 bolt internal wastegate...

Awesome. It looks like Holley finally got the crank/cam sync thing figured out. Why did you go with the stand alone? I'm all for it in your case but just curious why you did.

I've always wanted to ditch the intercooler and eliminate a lot of piping. But mine is mainly a street car. Do you guys drive yours on the street?

Nice build! So the CG Fab headers don't clear the frame rails?

Lol!!!!

You know your cam specs and they are spec'd properly for your set-up. He has no idea what the cam specs are on those HPP cams. At least on the 4V engines, HPP has spec'd some pretty lazy "turbo"...

There are a couple of big unknowns-the cam specs and the turbine wheel specs......

What's the set-up Jake?

The truth is, a set-up will never gain anything by going to a smaller pipe after the turbo. More likely than not, there are gains to be made by going to a larger pipe after the turbo. Many people...

I do agree that turbo set-ups are complex and there are a lot of variables that affect how the turbo responds. Having short runners on the intake and huge cams are hard to overcome if the desire is...

What he is mainly talking about is the up-pipes (pre-turbo). So you have downsized the up-pipe on set-ups and have lost huge power?

Yeah, I guess I could see that to some degree. I'm sure there are other dynamics that go on that add to it.

Those flanges look pretty good. Other than what Kevin is talking about, the pipe is typically squared off then welded onto a standard rectangular-holed flange. So those would make it easier I...

BTW, my car has 1 3/4" HP headers and 2 1/2" up pipes and has no problem spooling the turbos fast. But my intake runners are pretty long.

Yep, I agree. I'm curious as to when it would become a restriction. I mean at some point, the header primaries would be smaller than the exhaust port size itself (they may be already-I've never...

Good thinking Kevin. I have always maitained that the biggest restriction in the whole hotside is the turbine housing. You can see how it necks way down where the gas squeezes through. I also...

I had a couple sets but sold them, sorry.

Yes, they are 12mm. People do drill them out to 12mm for the larger/stronger bolt (I've had it done on the Ford FR500 cams).

How much compression are you running now?

Can you get a part number off the cams and contact HPP to see what they are? It's most likely a combination of large cams and a short runner intake made worse by a tight converter. People tend to...

Ok. Wow, so you are saying that the converter is locked up all the time during WOT? If so, yeah, that would definitely defeat the purpose of the auto helping to spool your turbos. You won't get it...

From what I gather, it seems the 2Vs are much more prone to detonation. Some 4Vs can run 18-19 PSI on 93 with no issues. I guess there is that much of a difference in the dynamics of a 2V vs. a 4V.

With today's compressor and turbine wheel technology, you can typically go pretty large on the a/r with the T3 housing. I had a .63 a/r on 5857 turbos but went with .82 a/r on the new 6266s. It...

I had an Abaco digital programmable unit.

Speaking of the fuel system..... I had twin GT pumps when I first started tuning the car. They ran out of steam at 525rwhp through a manual trans. This was on E85 with no BAP. I'd keep an eye on...

Yeah, I installed the ProEFI, etc. I'm making some changes engine-wise now. Winter project I guess, lol.

Well, the cams/intake combo could be a big part of the slow spool. Like you kind of alluded to, everything needs to be matched up for it to work like you want. Like already mentioned, a looser...

I agree on all points. My converter was initially really tight and I couldn't hardly foot brake it at all without it breaking loose. Also, the intake manifold plays a huge part in it too. Short...

I think some of it is the tune (mainly the ignition timing). Your Eboost could be doing it also. If those turbos are 60mm and with the auto, it should spool faster with the right converter. What...

Yeah, you just don't want to go smaller overall behind the turbos. Obviously you want that cross sectional area as large as possible without a ton of bends. That's why when you said you were making...

I can see going smaller on the up-pipe but after the turbos, you want the piping to be as large as possible (which won't cause slower spool).

Cool. So are you talking the hotside before and after the turbos?

What brand of turbos do you have? What kit? Looks like it's making decent power through an auto on a Mustang dyno with that ignition timing.

Did you reach your peak power by 8K RPMs?

How high did you spin it?

Details?

I'd like to hear all the Modular people that are bending/breaking Manley Pro Series I beams, Oliver I beams or even Manley or Eagle H beams. People are making huge reliable power with these and...

Makes sense Ed!

I've often wondered how the aluminum rods would do in a street car with, say ~800-900rwhp-nothing too extreme. It would be interesting to see how much the aluminum has stretched over a period of...

Dude, swapping those Crower cams won't gain you anything. If you are going to do it, go with something larger. The GT cams have a lift of .472" I believe (they might even have .475"). The lift in...