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Dump Pipe

tridentt150v

By tridentt150v,
in Engines & Forced Induction

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tridentt150v Grand Master

tridentt150v

Posted
Posted

I am trying [in my amatuerish way] to install a split dump. But I notice that the split dump has no mounting hole for the wastegate actuator arm from the vacuum???? [is this what it is]. If there is no hole, can I use this dump??? The turbo is my std one with a GCG highflo job.

PS Didn't even notice this until I had half the inlet etc taken off.............doh!

post-5748-1158458063.jpg

post-5748-1158458092.jpg

post-5748-1158458107.jpg

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SteveL Mentor

SteveL

Posted
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I am trying [in my amatuerish way] to install a split dump. But I notice that the split dump has no mounting hole for the wastegate actuator arm from the vacuum???? [is this what it is]. If there is no hole, can I use this dump??? The turbo is my std one with a GCG highflo job.

The only turbo I've seen with the waste gate in the dump was from a Commode VLT (ie RB30ET). Stock RB2x turbo's have the waste gate built into the turbo exhaust housing. The answer to your question is that the new dump pipe you have won't work with that turbo......

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MANWHORE Grand Master

MANWHORE

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The only turbo I've seen with the waste gate in the dump was from a Commode VLT (ie RB30ET). Stock RB2x turbo's have the waste gate built into the turbo exhaust housing. The answer to your question is that the new dump pipe you have won't work with that turbo......

surely you can just make it fit. e.g. bitta welding, dirlling etc whatever?

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tridentt150v Grand Master

tridentt150v

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Thanks SteveL and Mr Italy..........

But to install a split dump pipe I would have thought that you would have to remove the rear housing for access to the exhaust and waste air?

Then you split them using the split dump, I'm getting a bit confused now!!!

The dump looks Ok except for no mounting hole, and Just Jap has the same kit advertised, so the split dump is definitely for a skyline.

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SteveL Mentor

SteveL

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The problem you have is that the new split dump is designed for a stock RB2x turbo with the wastegate dump valve built into the turbo exhaust housing. The turbo you show in the middle photo is not a stock RB2x turbo (at least none that I've ever seen....and that's more than a few).

Your turbo has the wastegate dump valve built into your existing dump...or that's the way it appears (in fact looking at the photo closely it appears you have some sort of aftermarket dump attached somehow to the original cast iron dump flange)....but it's a bit hard to see). In any event, the new split dump simply doesn't have provision for the wastgate valve arrangement you currently have.....and there's no way to fit it (easily).

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tridentt150v Grand Master

tridentt150v

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I always thought it was a std turbo for a '98 Gtst, but I guess I'm wrong. Yes, the wastegate valve is built into the the cast iron dump flange housing. The dump pipe I have is an aftermarket one that came with the car, it bolts to the cast iron flange housing, it is not a split one, so I was hoping to upgrade, but I guess this will not happen [unless I also upgrade the turbo].

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AlexCim Grand Master

AlexCim

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That is not a stock turbo for an R33.

It appears that you have highflowed something like a VL turbo, then to adapt the stock exhaust on (dont know why you would use a stock exhaust with a highflow but yeh) they have cut the dump pipe to suit that turbo, welded on a flange for the RB2x turbos, then bolted your dump onto that...

Infact, on closer inspection, it doesnt look like a stock dump pipe either...

Honestly, I cant tell just from that 1 photo. Its really weird, good luck though.

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tridentt150v Grand Master

tridentt150v

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Its not a VL turbo as far as I know. It came from japan with that turbo.

GCG didn't say anything about the type of turbo when I had it hiflowed.

The invoice says GTS-T Turbocharger Part Nymber #713255-11 - if thats any help.

Can anyone post a pic of the rear of a std turbo?

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tridentt150v Grand Master

tridentt150v

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Damn, learn something every day.........

I'd still like to know what turbo I have then [made 240rwkw with very good midrange before tomei cams], so must be half Ok?

Reckon i'll have to take it off and send it to GCG or somebody and see. Can't take it to anyone here, I'm the only skyline within a 100km.

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