Kevpell18

iTrader: (3)

After searching for a couple days i have been unable to find a manifold that fits my application and need some input from you guy's. I have a 1983 rx with a 91 turbo 2 with a t04 turbo and a 50mm wastegate and a XS-POWER manifold. The problem is the shop I go to says that the wastegate pipe needs to be at least two inches in diameter in order to avoid boost spike??? I have been unable to find one with a two inch pipe or a place that I can have a tubular manifold custom made to my specs and clear everything. Attached are some pics of the setup let me know what you guy's think thanks a lot.

Kevin

dubulup

that looks like one sick set-up...not sure how to answer your question though.

I'm not sure that is the only way to avoid boost creep. I guess you are having issues now?

Kevpell18

iTrader: (3)

Ya i have a bad spike and he states that too small of a wastegate pipe is the problem (Can't divert exhaust fast enough) but any info helps thanks

Turblown

iTrader: (12)

I've experienced the same thing on those manifolds. There are a lot of places, including us, who can make you a manifold however you want...

dubulup

does the boost settle back down?

I wonder if a pop off valve would be a more cost effective/less time consuming adjustment...and it would keep your super fast spooling characteristic.

C. Ludwig

iTrader: (27)

Whoever fabbed the charge pipe should be able to do a manifold. That flare from the turbo to the IC is trick as hell. Very nice looking car!

RacerXtreme7

iTrader: (2)

I gotta agree, the car is absolutely gorgeous (that charge pipe is WELL fabricated), its a shame it has a POS SSAutoChrome manifold, is it a SSAChrome turbo as well?? (sure does look like one)? The shitty design of the XS-Power / SSAutoCrapper manifold wastegates from the rear rotor mostly. Move the wastegate closer to the turbo flange and I'm willing to bet it will work more effectively without going to a huge 2" diameter. But I more of less think you should get a proper manifold/turbo built and ditch the eBay junk and do that gorgeous car/engine work justice having both better response (less lag) and overall more power and less strain on the engine)

~Mike.............

Kevpell18

iTrader: (3)

No the turbo is a garrett so i think at least the turbo is good, but the manifold due to the lack of room was the only one that would fit under these conditions so i think i am going to have to go with a custom manifold to make this setup work the way it should. And for having them do the manifold it took them a year and a half to get them to do the ic pipeing as nice as they did so a manifold is out of the question though it would be nice if they were that skilled.

C. Ludwig

iTrader: (27)

FWIW we've used the 2nd gen HKS cast manifold with turbo FBs before and they fit fine. We did not have boost creep or spike issues with a street ported engine and a small .81, p-trim hotside. The wastegate was a Tial 44mm.

Location of the turbo looks to be similar as what we had with the HKS. Would be a shame if you have to move the turbo and rework the charge pipe. I love that piece incase I didn't make that clear already.