Ultimate Racing HFC Install & OEM Comparison
#22
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Originally Posted by LMG_35C
thanks... I know exactly what you mean about eliminating the CATS. My '71 340 Wedge Plymouth is long gone
I like the design of the UR CATS and am now trying to confirm fitment on my G35 Coupe. Z1 Performace says 350Z only and they told me they don't know anything about the G35 ????
I messaged UR but have not yet heard back. No one on G35 Driver has responded yet with thier experience either.
What made you buy these and not the Crawford or AAM / Other Brands?
...long live sunny sunday drives!
LMG
I like the design of the UR CATS and am now trying to confirm fitment on my G35 Coupe. Z1 Performace says 350Z only and they told me they don't know anything about the G35 ????
I messaged UR but have not yet heard back. No one on G35 Driver has responded yet with thier experience either.
What made you buy these and not the Crawford or AAM / Other Brands?
...long live sunny sunday drives!
LMG
Key factors in my Ultimate Racing HFC decision were:
1) No reports anywhere of issues (cracking, fitment, blow-outs etc.)
2) 100% stainless vs. some brands are partial or aluminized
3) Warranted for 50,000 miles
4) Don't look aftermarket (stealth if you will)
5) OEM style mounting brackets
6) O2 sensor bung
7) Like the idea of better sound/HP without polluting
8) Expect that they will pass sniffer emission test
9) No CEL issues
10) "Reasonable" price
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Originally Posted by nizmoz
I have NISMO Headers and a full NISMO Cat Back Exhaust. Do you think UR HFC's would work with my set-up?
If you do it, please let us know the results.
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Originally Posted by Gary King
The channels per square inch you mention is the cell count. I'm not trying to steal your thread but, their is some very good technical info to be found at this Random Technology web page:
http://www.randomtechnology.com/technical.html
Hope that helps.
Gary
http://www.randomtechnology.com/technical.html
Hope that helps.
Gary
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Glad you enjoyed the info. I too forgot about the bead technology, I can remember an uncle of mine emptying one out, a long time ago, from his 196? mustang in his garage and me asking what he was doing, he said "this will make my car faster."
Gary
Gary
Originally Posted by m1james@bellsou
Thanks for the excellent link on cat technology. I almost forgot about the earlier bead technology. Also worth noting is that the story talked about the by products created and how stainless casings are used to avoid corrosion. Evidently some manufacturers are not aware of the corrosion potential? Beware if you are considering cat's that are not stainless steel.
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http://www.z1auto.com/prodmore.asp?m...ust&prodid=580
or could be the heatshield too...it is a close fit and bending it up slightly is a good idea.
or could be the heatshield too...it is a close fit and bending it up slightly is a good idea.
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Originally Posted by danielwebb
I just installed these and was dissappointed to find out that there is a metallic buzzing sound when under WOT between3-5k rpm's especially when the car is cold.
It is a close fit on the driver side. When I installed mine, I made it a point to hold the cat with pressure away from the floor board while I tightened it. There is just a bit of play caused by the diff in the stud diameter vs. the hole. You may be able to loosen then re-torque the way I just described.
I'm not sure if you installed yourself or had a shop do it. This is one of many reasons I don't take my car to a shop. In many cases the focus is on speed, not fitment or quality. If it's the only Z they've done they would have no knowledge of the potential problems.
Personally, I don't like the idea of hammering on the floor board of the car. If that's the only option I guess you have to but I don't like it myself.
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Originally Posted by danielwebb
wouldn't what you're decribing cause it not to seal correctly?