Bellato Donating Members 2,713 Member For: 14y 1m 8d Posted 15/08/13 12:13 AM Share Posted 15/08/13 12:13 AM 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 restrictionI 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 Link to comment Share on other sites More sharing options...
Never had any say Panda I <3 Floods Silver Donating Members 11,198 Member For: 13y 3m 26d Gender: Male Location: South West QLD Posted 15/08/13 12:36 AM Share Posted 15/08/13 12:36 AM 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.. Link to comment Share on other sites More sharing options...
Ralph Wiggum Moar Powar Babeh Lifetime Members 19,323 Member For: 19y 2m 4d Gender: Male Location: Perth Posted 15/08/13 12:42 AM Share Posted 15/08/13 12:42 AM ^whs, drop the cat pipe and have a look is the quickest method Link to comment Share on other sites More sharing options...
XtRmn8 570Nm @1800rpm Donating Members 2,441 Member For: 21y 2m 5d Gender: Male Location: Perth, WA Posted 15/08/13 12:55 AM Share Posted 15/08/13 12:55 AM 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? Link to comment Share on other sites More sharing options...
Bellato Donating Members 2,713 Member For: 14y 1m 8d Posted 15/08/13 01:29 AM Author Share Posted 15/08/13 01:29 AM 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 somethingIts 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 Link to comment Share on other sites More sharing options...
Never had any say Panda I <3 Floods Silver Donating Members 11,198 Member For: 13y 3m 26d Gender: Male Location: South West QLD Posted 15/08/13 01:33 AM Share Posted 15/08/13 01:33 AM Umm.. With 100psi fuel pressure maybe you need a new regulator? Link to comment Share on other sites More sharing options...
Bellato Donating Members 2,713 Member For: 14y 1m 8d Posted 15/08/13 01:53 AM Author Share Posted 15/08/13 01:53 AM Skipped a sentence, was meant to say putting new fuel reg in 2moro so see how that goes Link to comment Share on other sites More sharing options...
ratter Member 6,793 Member For: 18y 6m Gender: Male Location: @ my laptop Posted 15/08/13 02:06 AM Share Posted 15/08/13 02:06 AM although you tune will require adjusting with different pressure, your afr is not causing your problems Link to comment Share on other sites More sharing options...
Bellato Donating Members 2,713 Member For: 14y 1m 8d Posted 15/08/13 02:10 AM Author Share Posted 15/08/13 02:10 AM My graph/afr's were based on the previous fuel pump as a retune wasn't done with the new pump if that means anything mick? Link to comment Share on other sites More sharing options...
ratter Member 6,793 Member For: 18y 6m Gender: Male Location: @ my laptop Posted 15/08/13 02:27 AM Share Posted 15/08/13 02:27 AM 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 1 Link to comment Share on other sites More sharing options...
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