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Hi Flow Cat?

black33gtst

By black33gtst,
in Engines & Forced Induction

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black33gtst Community Regular

black33gtst

Posted
Posted

Hi guys my r33 gtst is currently running 171rwkw with std turbo set at 10 psi SAFC2 walbro pump and cat back kakimoto exhaust hks pod R34 SMIC.

Question is will there be much gain on adding a high flow cat and also a dump pipe (current dump = std).

And what are the cat and dump from JJR like?

Thanks

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BLK33T Community Regular

BLK33T

Posted
Posted

JJR dump pipe is brilliant ...

excellent fit ... superb flow ...

when i fitted mine up boost jumped from standard 7 psi to 14psi ... which obviously caused issues with the standard ecu ...

the only trouble is that one of the turbo water lines need to be slightly bent to ensure enough clearance.

Just Jap don't make their own high flow cats though they use x-force ones :woot:

best bet ... get a JJR split dump pipe and a high flow metal cat or catco cat :)

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Chi100188 Mentor

Chi100188

Posted
Posted

hmmm i had the same problem with the JustJap split dump pipe so i exchanged it for a Xforce Bell Mouth dump but yeah go the Hi flow cat or maybe the cat replacement pipe? im sure you'll get a gain but as said before the side mount could be changed for front mount i guess....:)

Cheers

Chi

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FATAZZ Grand Master

FATAZZ

Posted
Posted

his got a r34smic(good for upto 220rwkw on rb20det's) his currently running 171rwkw.

get the combined dump and front pipe and 3" high flow cat dude. whether its a split or bellmouth dump thats up to you.

when you change turbos THEN grab a fmic.

goodluck

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limpus Mentor

limpus

Posted
Posted (edited)

Some members claim that xforce cats are good...and i have no reason to doubt them...but personally i steer clear from them...

I had one on my R32 Gtst with a HKS2535 and after tune i only got 200rwkw...that was really low and my tuner and i were scratching our heads trying to find the cause of the low power...a restrictive cat was a possible cause...i decided to go for it and shelled out $400 for a Metal cat...immediately the difference was noticeable with boost coming on much earlier and harder...a retune and run on the dyno saw a decent power increase with power rising from 200 to 215rwkw with just the change of the cat and a retune...midrange also improved tremendously...obviously the power gain was also due the the fact that my tuner could dial in alot more ignition timing due to the reduced restriction in the exhaust...but it proved that in my case the xforce cat was crap...

Take what you will from this but i hope it is reason enough to pass on the xforce cat...and as for the dump pipe...yes there will be a noticeable increase so if you don't have one already then go for it...

Edited by limpus
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limpus Mentor

limpus

Posted
Posted

I have had good results with the magnaflow ones too...i'd be inclined to go magnaflow over xforce...and recently the metalcats seem to be having a bad rep due to it collapsing...hasn't happened with mine but i'll monitor it...

$250 for a 4" one seems decent...

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