the center can be ported to suit, they're already very close to TII port size but the S5 is preferrable since it has no EGR ports which disrupt airflow.

 

Our stud kits work with the OEM flywheels, and they don't require any machining. I do believe I spoke with the mentioned owner, and it sounds like the casting on his S4 front iron has a slight variance. He should use a bottom end tap on it, you can usually get 3+ more threads in his situation. I have personally used our stud kit on a lot of engines, and have sold hundreds of our kits without any problems. I don't have any S4 OEM flywheels to double check, but if I do find a problem I will shorten the threads a few mm.
Every once in a while I have seen the need to drill out( not on a mill, just a drill press) just 1 hole on the S4 rotor housings, normally this isn't a problem.

 

^That's good to know.

 

He says the irons are JDM, what kind of differences does that mean?

 

none, the S4 US center housing is the oddball one, as it has the EGR passage

 

it also means it has a higher possibility of having the upgraded rear iron, which seems to have been an afterthought for the US market.

 

Okay, back on the turbo aspect because I've been looking through the FS threads. If a .60 a/r is going to choke at about 6500rpm what about a .84 a/r?

Specifically this 60-1 turbo:
.70 compressor side
.84 hot side fully divided
P trim wheel

I know you said 1.12 a/r, but those surprisingly are hard to find used.

 

That is a good deal, and from a good seller. If you are going to run an open wastegate, and a 3.5" or bigger exhaust system the .84 will be fine below 18psi on that turbo. Above 18psi, and past 6500rpms the .84 will start to hold it back.

 

Damn, 3.5" is huge! That's bigger than RB's REV TII system. I don't really plan on 18psi, unless it's needed for my whp goals but I'd think not after reading a lot of threads on here and other places.

I'm looking for a nice, torquey feel, something that comes on quick and gets me moving, hence the high comp for when it's off boost, and if that sets an arbitrary limit to my rpm, as long as it's not too low and 6.5k isn't really I'd think, I think I can live with that. But, here I go assuming again, I'm guessing porting would also be a factor in that limit, correct? Larger port/breathing more = lower rpm before it starts choking, I'm guessing? I was reading up on Pineapple, I think, and they say if you keep a smaller exhaust port with a larger intake it gives a flatter response, just at the cost of lower peak, which again would be fine. I'm just looking for a nice dd that I can possibly start going to my local track with on the Friday night run-what-you-brought races.

 

For what it's worth, that turbo is the one I'm selling. I have yet to put it on a dyno, but with my 3" do to 2.5" y, it simply keeps pulling to redline for me. This is with a mild street port on an RE. This isn't to say that Elliott is wrong by any means. I'm just giving my personal impression. I love the way this turbo comes online. I'm only selling so I can turn the boost up even further.

 

I'm only looking to buy to enter into the turbo world. I guess it's a win-win lol. Though, I'm going with 9.7 rotors, don't know what you're running, so it'll be interesting.

 

9.0 in my setup.

 

Okay, back from the dead, I just came across a Holset from a friend's Dodge, he upgraded so I got it for practically free, and was wondering if it would work.

RE, I know you said a T3 might be a little limiting with a small A/R but it's a 21cm^2 hotside which is just under 1.15 if my research is correct, only found info on a 22cm^2 which is 1.15 and 18cm^2 which is 1.00. Just wondering if that would work? I am willing to run a big wg or even a pair if needed, I just think for a free turbo this would be great.

I've read a lot of FDs use smaller Holsets, like the 18cm^2 ones, and do just fine even on 1/2 bridges.

 

How do you tell if the s5 t2 rear iron is the thicker casting vs thinner casting?

 

Rotary Resurrection, rear iron pictures

 

Ahh, thanks eage8! Time to dig through my parts now