HOLY CRAP! 28 psi boost spike on 91 octane & lives to tell about it.
Thread Starter
Joined: May 2001
Posts: 2,390
Likes: 2
From: San Francisco, CA
HOLY CRAP! 28 psi boost spike on 91 octane & lives to tell about it.
Well I came close to popping my motor.
During Sunday's dyno tuning with Steve Kan, my wastegate got stuck closed and the engine overboosted to 28 psi according to the Haltech datalog. We were running 91 octane and were certain there was a mistake with the Haltech so we checked the Profec B which read 29.4 lbs.
I have ceramic apex seals and an Aquamist system that runs 66% methanol and 33% water. I'm sure the two of those saved me from another engine build.
Never did get the wastegate problem sorted though so no final numbers.
fwiw, the car made 397rwhp and 392rwtq at around 5300rpm when Steve let off. He has the dyno chart apparently.
During Sunday's dyno tuning with Steve Kan, my wastegate got stuck closed and the engine overboosted to 28 psi according to the Haltech datalog. We were running 91 octane and were certain there was a mistake with the Haltech so we checked the Profec B which read 29.4 lbs.
I have ceramic apex seals and an Aquamist system that runs 66% methanol and 33% water. I'm sure the two of those saved me from another engine build.
Never did get the wastegate problem sorted though so no final numbers.
fwiw, the car made 397rwhp and 392rwtq at around 5300rpm when Steve let off. He has the dyno chart apparently.
Thread Starter
Joined: May 2001
Posts: 2,390
Likes: 2
From: San Francisco, CA
that was with the spike.
we only did that one pull as the wastegate problem was there to begin with and was not resolved that day.
I didn't even know about it as the motor was brand new and had only 650 or so miles on it when it went on the dyno and everything worked perfectly with the last setup.
we only did that one pull as the wastegate problem was there to begin with and was not resolved that day.
I didn't even know about it as the motor was brand new and had only 650 or so miles on it when it went on the dyno and everything worked perfectly with the last setup.
BOOSTED Vert
Joined: Sep 2002
Posts: 2,307
Likes: 0
From: Miami
Originally Posted by RX-Heven
that was with the spike.
we only did that one pull as the wastegate problem was there to begin with and was not resolved that day.
I didn't even know about it as the motor was brand new and had only 650 or so miles on it when it went on the dyno and everything worked perfectly with the last setup.
we only did that one pull as the wastegate problem was there to begin with and was not resolved that day.
I didn't even know about it as the motor was brand new and had only 650 or so miles on it when it went on the dyno and everything worked perfectly with the last setup.
BOOSTED Vert
Joined: Sep 2002
Posts: 2,307
Likes: 0
From: Miami
Originally Posted by APEXL8T
can you program zero fuel in your maps to cause a fuel cut? Even full rich with 85% inj. duty at your peak boost it can still ignite and pop if you spike.
Trending Topics
Thread Starter
Joined: May 2001
Posts: 2,390
Likes: 2
From: San Francisco, CA
Originally Posted by FD Rey
Well by the looks from his sig, he has a 20B, so the torque numbers sound about right.
I sold my 10th Anniversery widebody that was getting the 20b and my 3 rotor now sits on the floor of my garage waiting to go into the vert.
Steve checked the idc and iirc they were at about 75%.
Thread
Thread Starter
Forum
Replies
Last Post
trickster
2nd Generation Specific (1986-1992)
25
Jul 1, 2023 04:40 PM
befarrer
Microtech
3
Aug 22, 2015 05:52 PM