Jump to content
SAU Community

Recommended Posts

Your standard type of High Flow Cat is usually a ceramic internal type, where the dearer Catco, X-Force and BPM 'Metal' or 'Metallic' Cats use a stainless biscuit core and flow a lot higher.

There is NOTHING wrong with X-Force Cats as above, dependent of course on the vehicle and its level of modification.

For the price, I don't think you can go wrong, and I have used one on my old GTS-T and had no problems at all with a significant performance gain.

I would say depending on your level of mods and how far you want to go... go a metal one... I bought a ceramic highflow... put it on... previously I had a gutted cat (straight through- all the inside bits taken out for max flow) going from that to xforce's ceramic was a massive step down...car lost a lot of power... but once again.. depends on how powerful your car is.

regards,

Adam

I might be able to help on this matter. I have an xforce ceramic bolt in cat on my car at the moment. I recently bought a "metalcat" weld in cat. getting it welded in on friday, getting the car re tuned on saturday, so ill post up a before and after dyno graph. I wouldnt imagine a BIG difference in power, but we shall see.

i got full turbo back exhaust with x force high flow cat, think flow was rated at 570-600.... very good upgrade, very noticable power gain great sound.... the cat was about $150

I might be able to help on this matter. I have an xforce ceramic bolt in cat on my car at the moment. I recently bought a "metalcat" weld in cat. getting it welded in on friday, getting the car re tuned on saturday, so ill post up a before and after dyno graph. I wouldnt imagine a BIG difference in power, but we shall see.

300ish extra cfm can flow thru the cat now, should probably see a bit, it will probably be noticeable.. cant wait for the results anyway

i got full turbo back exhaust with x force high flow cat, think flow was rated at 570-600.... very good upgrade, very noticable power gain great sound.... the cat was about $150

xforce make a cat that is about double than close to double that flow and price too, check to see if you got the oval type? or the higher flow racing cat (round barrel style)

Edited by Angus Smart

I agree that it depends on mods, i have a hi flow (hi flow front vg30 rear) blitz fmic, jjr split one piece dump with a 3" the rest of the way, apart from the cat, that was still the factory 2.5", put the x-force ceramic cat in today, got rid of a mis i had (although i also did the cam belt no idea if that would have helped) power is now more crisp, boosts a little earlier and harder and is also a little quieter when idling, i would say they are a good thing, that being said my next engine im hunting for 300-350rwkw and will probably upgrade or remove the cat completely.

WRONG!

Have a full xforce exhaust, including cat. Running over 400hp on an rb25 for 3 years. What more could you ask for??? Flows well, good value for money.

Not wrong.

I put a 3" supposedly "high flow" Xforce cat in to go over the pits and it was crap. Loss of power and response, felt like crap to drive, took it out as soon as I got home.

I was trying to push 3L worth of exhaust gasses through it though.

Which cat are you running? a "High flow"? or a "Race" cat?

And if you went from a stock exhaust to a full Xforce exhaust then yes, it is going to feel a lot better but you have nothing but a stock exhaust to compare it to.

Edited by bubba

^^^ agreed

I took my HI FLOW x-force cat out for de-cat and perfromance gain was heaps better.

I haven't tried the race cat one with higher flow but i am sure they would be alot better much like a de-cat

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Similar Content

  • Latest Posts

    • Sounds like you've got an interesting adventure ahead here with local support if you have trouble! My guess is that, unboosted, you will be OK with a small upgrade like -9. What will happen is that once the stock ECU sees more airflow than it expects it will add a heap of fuel and pull a heap of timing to be safe because it can't understand how it could get that much air without there being an issue. You will see clouds of black smoke and it won't pull hard through the midrange and top end. So, overall it will be a bit frustrating but should be OK. If you are still nervous set the base timing back 2o through the CAS, but it will be even more sluggish everywhere. As said above through...this is not my guarantee your engine won't be blown into a million pieces, leaving you looking for very hard to find parts A better idea is get a computer with logging ASAP, wire in a wide band O2 sensor and a use remote tuner. I've done multiple cars this way and while it is not as good as a specific tune on a dyno they can get it 90% right. I'd suggest if you can afford an R33 GTR these days you can afford an ECU and tune. And if you can't afford that you sure won't be able to afford the rebuild if it goes bad in the meantime,.  
    • Yeah it would be nice if someone took the time to put that sort of information together, but there are a lot of variations in looms. I think you are making this way hard for yourself if you just want to get it running....sourcing an SR20 with the right wiring will be a billion times easier than matching the RB loom to an S15 chassis. If you do end up going this way, you just need to trace every wire in the loom with a multimeter, 95% of them will go to a location you can confirm at the ECU.....and then post it up for the next person who needs it  
    • Just top it up with water, and keep a general idea of how much you added. It is normal for water to be pushed into and pulled out of the reservoir through the cap, and it should not be more than half full or it will be likely to overflow when hot. Any decent mechanic can do a pressure test of the cooling system to confirm if you have a leak. Keep in mind if it is only leaking a little and when hot it may well evaporate before you see it hit the ground
    • I'd ask the shop what they used and use that. Mixing coolants is sometimes OK, sometimes not, and you have know the details of each coolant to know whether it's a good idea or not.
    • Is it alright to top up with just another green coolant?
×
×
  • Create New...