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How To Tell If Your Cat's Holding You Back?


Bellato

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  • Member For: 14y 22d

Just wondering if there as an easy way for myself or my tuner to tell if my cat is what's holding back my power.

Currently tuned to 295rwkw in an FG with a mods list that should see 300 and I was just going to leave it there but going to be upgrading the fuel reg next week (and getting it put back on the dyno) and just wondering whether it's worth changing my cat to see if I can crack 300. Just because this is the only part which isn't a proven brand to work well so thought it might be worth changing if its a restriction

I don't want to just change it and see, that's why I'm wondering if theres a way to check the cat before changing it

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  • Member For: 13y 3m 9d
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  • Location: South West QLD

What sort of Cat is in it mate?

Some of the metal cats don't have spot welds holding the substrate in place and it's possible for it to dislodge and rotate a bit..

Best way is either to unhook part of the exhaust and look in at it..

I only know this because a mate had a magnaflow cat and it completely dislodged inside..

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  • 570Nm @1800rpm
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  • Member For: 21y 1m 19d
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What cat is in the car now?

The Venom bolt in cats seem to ok, so curious to know if that is what you are running?

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  • Member For: 14y 22d

Yea I thought physically looking at it was the only thing, was just wondering if there was something you could test like exhaust flow or something

Its a Hurricane s/s 100cell.

Just got a call from my tuner and found out I have 100psi fuel pressures and car was originally tuned with a pump (that must have been faulty) that was producing 58psi so now my tune is out and its possible that this is the reason the car didn't make the power I was expecting as injectors aren't calibrated for the high fuel pressure. So going to see how that goes and then if get nothing then will be looking at the cat.

Cheers

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  • Member For: 18y 5m 14d
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my comments still stand re needing a tune for different fuel pressure, but to be honest if your pressure was high it is only going to be at idle and low rpm only so really a full re tune is not going to be required, this is based on what I have seen in the past, but your afr's are not your power problem

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