Thinking about Winter Jobs... Sorry...
Discussion
So having finally had my sills re-painted and wheels re-furbed last winter I'm looking at what this winter might hold. One thing I'd like to do is to replace the 4 OE cats found on an SRT with 2 high flows to reduce temps mainly. Roe Racing and PartsRack each have 2 different types, one with a flex pipe and one without, my inclination would be to stick with the flex pipe - any thoughts?
Mark
Mark
Are you sure? Roe seem to list a single high flow cat per side that replace the two cat's in each side, and they also offer a cat delete pipe with no cats, both have flex pipe, the bend and solid pipe where a cat would have been but isn't anymore, its just the only one that mentions the flex pipe in the headline is the decat pipe. They also offer the bare cat that you weld into your own pipework.
Ginja said:
Yeah that has a flex pipe, i cant see any on Sean's site without a flex pipe unless you go to the raw catAhh i see now, i thought you meant they both had both options, i have looked at parts rack now and see Sean has the flex pipe and jon b doesn't.
Well i'm not sure now then, you can save a few bob by doing away with the flexi, the solid pipe overcomes the movement problem by not using the forward attachment so any movement is spread across the whole exhaust. Jon is right in that this is how the bellanger headers are set up and i have them on the GTS, i haven't really had any issues there with the solid pipe but my exhaust isn't welded, i just used the wide band clamp that stretch a little to seal the joint, they work well but may provide some movement.
Jon claims the solid pipe saves weight and is less restrictive, he is probably right, but if your doing it for heat reduction does that matter?
If it was me and my goal was heat reduction then i would probably go with the flexi pipe option to minimize possible other problems.
If i wanted to save money and or maximize performance then the solid pipe would be my choice.
Are you going to weld them in or just use clamps? if your getting the welder out or getting someone to do it then is it worth cannibalizing what you have and just cut out one of the cats or both and replace one, i doubt they are really anything special and my mind is brought back to both when i got the bellengers from jon which i paid for long turn outs to fit high flows that weren't long enough and when i ordered the specific full collector and CAT system for the camaro for an easy bolt in, only to find they sent the US part that was slightly different to my Euro car so i ended up cutting it all up and welding just the cat in anyway which would have cost a fraction of the price if i had just brought the bare cat!
if you are clamping them in then i strongly recommend these
http://www.napaonline.com/Catalog/CatalogItemDetai...
they do a straight one too for butting two same size pipes together, they are the only clamp i have found that will seal and hold the 3" exhaust and even then its a close thing on the o2 at MOT time.
Well i'm not sure now then, you can save a few bob by doing away with the flexi, the solid pipe overcomes the movement problem by not using the forward attachment so any movement is spread across the whole exhaust. Jon is right in that this is how the bellanger headers are set up and i have them on the GTS, i haven't really had any issues there with the solid pipe but my exhaust isn't welded, i just used the wide band clamp that stretch a little to seal the joint, they work well but may provide some movement.
Jon claims the solid pipe saves weight and is less restrictive, he is probably right, but if your doing it for heat reduction does that matter?
If it was me and my goal was heat reduction then i would probably go with the flexi pipe option to minimize possible other problems.
If i wanted to save money and or maximize performance then the solid pipe would be my choice.
Are you going to weld them in or just use clamps? if your getting the welder out or getting someone to do it then is it worth cannibalizing what you have and just cut out one of the cats or both and replace one, i doubt they are really anything special and my mind is brought back to both when i got the bellengers from jon which i paid for long turn outs to fit high flows that weren't long enough and when i ordered the specific full collector and CAT system for the camaro for an easy bolt in, only to find they sent the US part that was slightly different to my Euro car so i ended up cutting it all up and welding just the cat in anyway which would have cost a fraction of the price if i had just brought the bare cat!
if you are clamping them in then i strongly recommend these
http://www.napaonline.com/Catalog/CatalogItemDetai...
they do a straight one too for butting two same size pipes together, they are the only clamp i have found that will seal and hold the 3" exhaust and even then its a close thing on the o2 at MOT time.
Edited by ViperDave on Wednesday 10th September 13:38
Thanks Dave, No welding here so thanks for the clamp advice!
I would imagine that a full Bellanger setup is designed from the start to not have a flex pipe whereas the OEM headers and silencers are. The Bellanger system just has to be lighter as well and therefore provide less stress on the system? Lightening has Corsa track silencers on him which are not the lightest so would probably need some support. As for performance, the high flow cat has got to help the flow and I can't see that the flex pipe will hurt much - its not like I have a setup where I'm looking for 110% performance! I just want to help the cabin temps, possibly get some extra noise and prevent any inner sill damage from the second cats.
Mark
I would imagine that a full Bellanger setup is designed from the start to not have a flex pipe whereas the OEM headers and silencers are. The Bellanger system just has to be lighter as well and therefore provide less stress on the system? Lightening has Corsa track silencers on him which are not the lightest so would probably need some support. As for performance, the high flow cat has got to help the flow and I can't see that the flex pipe will hurt much - its not like I have a setup where I'm looking for 110% performance! I just want to help the cabin temps, possibly get some extra noise and prevent any inner sill damage from the second cats.
Mark
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