Hks Or Trust-greddy?

[andz]

hey guys,

im looking to purchase a set of split dumps and front pipe for my 34 GTR

but not sure which brand to go for?...

from nengun; HKS is around $1200 delivered, Trust dumps-front combo is around $1000 delivered

which one should i get?

Also, i cant seem to find them locally (in Australia)

May the torque be with you

cheers,

[godzl1975]

didnt think that HKS dumps were that much?

edit...plus front pipes my bad ......the thrust ones arnt bad..that what i have on mine.

[Wheezy]

autobarn is a Trust / Greddy supplier

[blk180]

HKS will be eazy to fit then Trust i belive. WRXHOON has fitted both maybe ask him.

[Beer Baron]

I'm going to throw a spanner in the works and say neither. the trust ones are a nice design but have 3 problems. 1. the cost. 2. they are hard to fit (more labour cost, or more heartache if you diy) 3. they are VERY heavy.

The HKS ones are ok, but the pipe diameter is very small and the bends quite sharp.

from my years of pondering GTR dump pipes I reckon now the Tomei ones are the best. A few people in the know in japan confirm they are a very good thing. and the quality of them shames both the HKS ones and the trust ones. plus they are quite cheap at around $650 or so delivered. I'd then mate those tomei dump pipes to whatever front pipes you want. personally I like the nismo ones, or if you have too much money in your pocket try the ARC ones (sexy), or even better ARC titanium ones (mmmmmm).

there you go, feast your eyes on those babies:

[benm]

I still don't understand why dumps cost so much, but anyway thanks for the info BB.

Edit: I wonder what it would cost to get some custom made dump/fronts for my car

Edited February 1, 2007 by benm

[Blitz]

The Tomei's are a nice looking dump, as are the Nismo's

[andz]

I'm going to throw a spanner in the works and say neither. the trust ones are a nice design but have 3 problems. 1. the cost. 2. they are hard to fit (more labour cost, or more heartache if you diy) 3. they are VERY heavy.

The HKS ones are ok, but the pipe diameter is very small and the bends quite sharp.

from my years of pondering GTR dump pipes I reckon now the Tomei ones are the best. A few people in the know in japan confirm they are a very good thing. and the quality of them shames both the HKS ones and the trust ones. plus they are quite cheap at around $650 or so delivered. I'd then mate those tomei dump pipes to whatever front pipes you want. personally I like the nismo ones, or if you have too much money in your pocket try the ARC ones (sexy), or even better ARC titanium ones (mmmmmm).

there you go, feast your eyes on those babies:

yah ive seen those Tomei dumps, they look nice...but they're not split

and they look exactly the same as my stock dumps

[sewid]

yah ive seen those Tomei dumps, they look nice...but they're not split

and they look exactly the same as my stock dumps

Yeah R34 GTR already has great single piece stainless dumps so the Tomei one's even at $650 would be a very large waste of money.

The trust one's are heavy because they're made out of a thick stainless which is a good thing. The difference in weight between a set of Trust front+dumps and your average HKS dump + front pipes has to be quite negligible. You want a lightweight dump and front pipes then you sacrifice longevity or you pay big money for titanium.

I personally use Trust front+dump pipes on my 34. I actually used the ones designed for an R32 GTR which meant i had to weld an extra temp sensor bung in. They physically fit in the car just fine but cause the following problems:

- Have to be extra careful when removing and refitting the engine as the pipes come close to the firewall during the procedure

- Changing O2 sensors on the car is a bigger pain in the ass then ever

- Air conditioning condensation rubber hose has to be removed resulting in aircon condensation dripping on your hot exhaust. Not a huge deal but strange hiss noise after a drive is weird

I would also consider coating the trust pipes in ceramic to keep heat in the exhaust. This is what I plan to do as last track day this area was dangerously hot after a bunch of laps.

[Beer Baron]

Yeah R34 GTR already has great single piece stainless dumps so the Tomei one's even at $650 would be a very large waste of money.

yeah, that's a very good point. I didn't remember the fact that the R34 ones are already stainless. d'oh.

The trust one's are heavy because they're made out of a thick stainless which is a good thing. The difference in weight between a set of Trust front+dumps and your average HKS dump + front pipes has to be quite negligible. You want a lightweight dump and front pipes then you sacrifice longevity or you pay big money for titanium.

actually that is a good point too. the other benefit of the really thick walls (i remember playing with yours) is that it will keep more heat in the pipe which is what you want for 2 reasons. 1. more heat in pipe=less heat in engine bay, and 2. more heat in pipe = higher gas velocity and therefore more power. so you're right, they are heavy for a reason. and like you say it wont hurt their longevity either. but I do worry just a little about the weight. but the positives probably outweight the negatives.

looks like my previous post made bugger all sense!

[andz]

They physically fit in the car just fine but cause the following problems:

- Have to be extra careful when removing and refitting the engine as the pipes come close to the firewall during the procedure

- Changing O2 sensors on the car is a bigger pain in the ass then ever

- Air conditioning condensation rubber hose has to be removed resulting in aircon condensation dripping on your hot exhaust. Not a huge deal but strange hiss noise after a drive is weird

I would also consider coating the trust pipes in ceramic to keep heat in the exhaust. This is what I plan to do as last track day this area was dangerously hot after a bunch of laps.

thanks sewid for the informative feeback

those probs u mentioned above ^^^ sounds too hard and time consuming

plus getting them from nengun would take an extra 3 weeks, b/c they have to be made on order

1. more heat in pipe=less heat in engine bay, and 2. more heat in pipe = higher gas velocity and therefore more power.

sounds good BB, but i think im leaning towards the HKS dumps/splits, bolt straight on is a lot easier for me.

plus i already have the HKS hipower cat back, and its really well manufactured.

thanks again guys for the feedback

appreciated

Andy

[blk180]

Sounds nice main reason im going for HKS dumps is because i have a full dumps back HKS twin exhurst system waiting to go on.

Brad

[Beer Baron]

cool. I'm sure they wont dissapoint. just be aware that the primary pipes on them are quite small. so I think they are only really good for 'moderate' power. maybe 350kw atw. after that I think something bigger and more open would be a benefit (even if it's not split).

[andz]

cool. I'm sure they wont dissapoint. just be aware that the primary pipes on them are quite small. so I think they are only really good for 'moderate' power. maybe 350kw atw. after that I think something bigger and more open would be a benefit (even if it's not split).

damaged has been done (to my account)

just ordered the HKS dumps and front pipe from nengun

[blk180]

Beerbaron i have yet spend my money on dumps do you see much differnts between split and non-split dumps?

[Beer Baron]

well I'm no where near being an expert but I've always been a fan of the split dump idea (and I've previously used split and non-split). BUT on a GTR there are serious space constraints, add to that the fact that most are designed to be 'bolt on' so they are very short too. bearing all that in mind I think I'm now convinced that for a GTR with twins (and especially larger low mount twins) a larger, non split dump is better. only because the primary on the HKS ones (and all the HKS copies) is quite small and a freer flowing pipe here will definitely be of benefit power wise. Tuners in the know I've spoken to tell me the tomei pipes are a very good thing as are the nismo ones. and they seem to perform a little better than the HKS ones. so I think for my car I'll be going tomei dumps, but if I thought I could withstand the fitting hassles I'd probably try the trust ones.

[R31Nismoid]

I'll be using the Trust ones for my 26.

Ive got a bit more room than you GTR boys so im a bit lucky in that respect.

Also using the trust ones, extra bracing IMO would go stray.

Remembering once there is some serious heat its going to potentially make it sh|t gaskets with the weight hanging on it.

I know one car had issues along those lines so i intend to avoid them where i can

[alexk]

I would also consider coating the trust pipes in ceramic to keep heat in the exhaust. This is what I plan to do as last track day this area was dangerously hot after a bunch of laps.

Would it be better to ceramic coat the pipes of wrap them in a thermal bandage?

[sewid]

Would it be better to ceramic coat the pipes of wrap them in a thermal bandage?

Well if you want my opinion coating is better than wrapping in every way except the money involved. Obviously it's cheaper to wrap but its a big pain in the ass with that fiberglass stuff getting everywhere.

[Beer Baron]

yeah coating for sure. wrapping is ok, but you can get moisture trapped between the wrap and the pipe which is not good. also when you put it on, if you dont wear gloves, and then take a slash afterwards your nuts will be itchy for a fair while. this alone is reason enough to spend the dough on the coating (or wear gloves...lol) and yes I speak from experience on this.