Nismo Intercooler Piping Not Holding Boost

[baicai]

Hi guys, so this week I installed the Nismo hard pipe intercooler kit on my R34 Gtr. After install took it for a drive and notice there is a boost leak and can't hold more than 0.4 bar of boost. So took the bumper off and re-tightened the clamps. The blue silicon hose that came with the kit was a bit thin so had to tighten extra hard and end up de-threading clamps.

I had no other option at the time but to put the stock hose back on and everything was working again. So my question is has anyone else installed the nismo or after market hard pipe kit with similar problem? I think because the cast alloy hard pipe is not perfectly round, with a thin silicon hose it wasn't sealing properly. So should I get a thicker silicon hose and maybe stronger clamps? Clamps that came with the kit was Murray gold seal worm drive, and the blue silicon hose is about 3mm thick.

Any help is much appreciated.

[baicai]

[baicai]

[breaker1845]

Did you buy a copy kit? If you aren't running extreme amounts of boost then good quality hose clamps and silicone is fine to use. You can use T bolt clamps and better quality silicon to aid with holding the pressure but if the kit is put together correctly then there shouldn't be any issues.

[GTRPSI]

Its got to be perfectly round if using good clamps with a bead all the way around it to stop the hose slipping off.

Get rid of those worn drive clamps too and get some proper clamps.

Im surprised that nismo would produce a piping kit that's out of round, the casting looks pretty off center and average, the bead does not go all the way around.

[Hadouken]

that pipe looks worse than my autobahn88 copy. And that holds boost fine btw

[baicai]

Yeah it's a genuine Nismo kit, to say I was disappointed in the quality is an understatement. Will probably try to get some thicker silicon hoses and stronger clamps and try again.

[Gts-t]

Are you sure its genuine? Who did you buy it from?

Post up more pics of your pipes and hoses showing the nismo logos too. Your pipe doesnt have a lip all the way around which is strange because when you look at the photos from this for sale thread you can see all pipes have a lip all the way around.

http://www.sau.com.au/forums/topic/445298-nismo-intercooler-piping-kit-bnr34bcnr33-brand-new/

Edit: lol just read the for sale thread through to the end, looks like you bought the kit from that thread from nurvous?

Edited August 27, 2015 by Gts30t

[Gts-t]

Well im confused, googling more pics shows the shortest pipe, the one you have pictured does have a lip that doesnt run the whole way around. In any case i know other forum members are using this nismo kit without problems so it may just be an installation problem

[baicai]

Yeah, bought it from nurvous, not blaming him at all, just think I might have got a defective kit. Yeah it does have the lip, I think it's because the pipe is not true round and the silicon hose that came with the kit is a bit thin so it leaks air as it doesn't sealing properly..

[scotty nm35]

It shouldn't matter if it's not perfectly round, as long as there are no dimples in it.

What's wrong with the stock piping? It is overkill for the stock power, and would probably support 600awkw at least.

[STATUS]

human interface issue.

[djr81]

It shouldn't matter if it's not perfectly round, as long as there are no dimples in it.

This. Bucket loads of this.

[baicai]

It shouldn't matter if it's not perfectly round, as long as there are no dimples in it.

What's wrong with the stock piping? It is overkill for the stock power, and would probably support 600awkw at least.

Was trying to improve the response on the -5 turbos as tuner says stock rubber hose cause some lag, wasn't about power.

[Missileman]

who is your tuner?

[Hadouken]

Lol

[sneakey pete]

The whole Rubber hoses cause lag thing comes from some other other japanese cars, first that comes to mind is certain Mitsubishi, that have 1+m of rubber pipe on each end of the intercooler. GTR isn't that bad.

That being said I got a second hand Greddy kit for a good price and I can't complain. Can attach fittings to it for sensors too which is nice.

[baicai]

Update:

Gave up and gave kit to mechanic to install, now running great with no leak, all he did was changed the broken clamps that I over tightened. Looks like it was my mechanical skills ( or lack of ) that was the issue.

[breaker1845]

Then sends you the bill for something you could of fixed by paying no more than $30 for. Those style clamps are prone to breaking easily because of their shitty design. If over tightened or adjusted incorrectly, which most people tend to do, the mechanism tends to break.

[MrStabby]

IIRC the workshop manual says the factory style clamps are single use...