kinetix h/f cats dyno results...not good.
Originally posted by MIAPLAYA
No one at the dyno day had any ECU tuning whatsoever. Although the gas vould be a factor I doubt it. Matt did you put more gas in your car between dynos?
No one at the dyno day had any ECU tuning whatsoever. Although the gas vould be a factor I doubt it. Matt did you put more gas in your car between dynos?
Originally posted by zxsaint
Lets see the charts...
Also, how soon did you redyno? While I don't have any evidence to back this up, I'm pretty certain the Z likes to pull timing when theres a sudden change in A/F. Takes some miles (maybe 100?) and some on/off cycles for it to settle. I noticed this every time I made a change on either side (intake/exhaust).
Lets see the charts...
Also, how soon did you redyno? While I don't have any evidence to back this up, I'm pretty certain the Z likes to pull timing when theres a sudden change in A/F. Takes some miles (maybe 100?) and some on/off cycles for it to settle. I noticed this every time I made a change on either side (intake/exhaust).
Originally posted by 287HP
Since your A/F is around 13.1 with the stock cats(which is quite high already), you could be losing power because the cats are making you run too lean. If you get your A/F to the low 13s with the high flows, you will probably see more power! A Low 13 A/F ratio is where our cars make the best power. So you are already at that A/F with the stock cats, and that might be why you are making more power with the stock ones!
Since your A/F is around 13.1 with the stock cats(which is quite high already), you could be losing power because the cats are making you run too lean. If you get your A/F to the low 13s with the high flows, you will probably see more power! A Low 13 A/F ratio is where our cars make the best power. So you are already at that A/F with the stock cats, and that might be why you are making more power with the stock ones!
Originally posted by lsdunique
I imagine it is possible that the internals of the converter have possibly collapsed.
It has never happened with our cats before, but I know it was a problem with the RT cats.
Give me an email at jamisonl@msn.com with original order info and I can have a new set sent out. I can send you a new set with a return shipping label for the old ones so you wont have any down time.
I imagine it is possible that the internals of the converter have possibly collapsed.
It has never happened with our cats before, but I know it was a problem with the RT cats.
Give me an email at jamisonl@msn.com with original order info and I can have a new set sent out. I can send you a new set with a return shipping label for the old ones so you wont have any down time.
Registered User
Joined: Mar 2003
Posts: 568
Likes: 0
From: Minneapolis
Originally posted by MIAPLAYA
No one at the dyno day had any ECU tuning whatsoever. Although the gas vould be a factor I doubt it. Matt did you put more gas in your car between dynos?
No one at the dyno day had any ECU tuning whatsoever. Although the gas vould be a factor I doubt it. Matt did you put more gas in your car between dynos?
Registered User
Joined: Mar 2003
Posts: 568
Likes: 0
From: Minneapolis
Originally posted by Z BOY
I'll find a way to upload the charts. I did my first 4 pulls on Sat, 8/28 with the kinetix cats, and then re-dyno'd 3 days later, 8/31, like 5 minutes after i had my stock cats reinstalled. What does it mean "to pull timing"?
I'll find a way to upload the charts. I did my first 4 pulls on Sat, 8/28 with the kinetix cats, and then re-dyno'd 3 days later, 8/31, like 5 minutes after i had my stock cats reinstalled. What does it mean "to pull timing"?
Originally posted by jjellyneck
It would seem that you and many of the other guys would have been running leaner than Matt--you have more airflow mods.
It would seem that you and many of the other guys would have been running leaner than Matt--you have more airflow mods.
Registered User
Joined: Mar 2003
Posts: 568
Likes: 0
From: Minneapolis
Originally posted by MIAPLAYA
Yeah Steel Heals had Plenum, DC headers, HF cats (Kinetix), Borla Trued Dual and POP Charger and did not have as high an A/F ratio as Z Boy
Yeah Steel Heals had Plenum, DC headers, HF cats (Kinetix), Borla Trued Dual and POP Charger and did not have as high an A/F ratio as Z Boy
Originally posted by jjellyneck
The ECU senses that the engine might be running too lean and it retards the timing slightly. This will reduce your power output. After awhile (100 miles or so) it adapts to the new airflow as best it can (within its parameters of adjustment) and adds more fuel and also adjusts back to a more advanced timing. Power then increases. Other guys might be able to explain it better, but those are the basics, I believe.
The ECU senses that the engine might be running too lean and it retards the timing slightly. This will reduce your power output. After awhile (100 miles or so) it adapts to the new airflow as best it can (within its parameters of adjustment) and adds more fuel and also adjusts back to a more advanced timing. Power then increases. Other guys might be able to explain it better, but those are the basics, I believe.
Since Isdunique is offering, I'm gonna exhange my questionable cats for a pair of new ones. Anyone want to buy 'em off me? I'm really liking the quieter exhaust note with the stock cats.
14.7 It is! I don't know where people are getting all these crazy numbers for Stoic.
:
Originally posted by Ryousuke
i thought that a stoicheometric a/f ratio was 14.7??
i thought that a stoicheometric a/f ratio was 14.7??
14.7 It is! I don't know where people are getting all these crazy numbers for Stoic. rolleyes:
:
Originally posted by Ryousuke
i thought that a stoicheometric a/f ratio was 14.7??
i thought that a stoicheometric a/f ratio was 14.7??
My z is running leaner with all my mods thats what im getting the reflash while im installing my JWT cams. When i dynoed my AF was a high 14 to low 14 all the way through. 
Thanks Glen
Thanks Glen
14 all the way through is dangerous. Get that fixed fast.
Originally posted by Zmego1985
My z is running leaner with all my mods thats what im getting the reflash while im installing my JWT cams. When i dynoed my AF was a high 14 to low 14 all the way through.
Thanks Glen
My z is running leaner with all my mods thats what im getting the reflash while im installing my JWT cams. When i dynoed my AF was a high 14 to low 14 all the way through.
Thanks Glen
Just rec'd my new cats today. Thanx, Kinetix, for your lightening-fast response! Now, anyone interested in some brand new h/f cats for $350 shipped? I've decided to stay stock plenum-back.
Thread
Thread Starter
Forum
Replies
Last Post
