HP limitations of a 24x reluctor
HP limitations of a 24x reluctor Hello,
While I realize this is a tuning question, I thought I'd get some helpful answers here due to the high HP aspect of it.
Does anyone know the highest HP that was successfully tuned using FI with a factory ECM that supports a 24x reluctor? Is there any benefit/can you switch to a 58x reluctor for more accurate control? I realize changing the reluctor wheel is a big deal, but not so much if you're starting from the beginning.
I realize high HP is subjective. For me I'm thinking over 1000rwhp tuned via speed density.
Curious about your thoughts. TIA!
While I realize this is a tuning question, I thought I'd get some helpful answers here due to the high HP aspect of it.
Does anyone know the highest HP that was successfully tuned using FI with a factory ECM that supports a 24x reluctor? Is there any benefit/can you switch to a 58x reluctor for more accurate control? I realize changing the reluctor wheel is a big deal, but not so much if you're starting from the beginning.
I realize high HP is subjective. For me I'm thinking over 1000rwhp tuned via speed density.
Curious about your thoughts. TIA!
I'm not sure if it's possible to swap my factory ecm with a different version. I'm not sure if I would lose gauges, active handling, etc.?
That they did switch when the patent timed-out makes me think that it was a better system. In theory it provides more data points to the ECM to predict crank angle.
Now if the delphi controls people asked for the switch I have to think there was good reason. What that reason actually is and how the 58x ECM's use that data I have no clue.
I'm sure there's a way to piggy back aftermarket engine management to your stock body control modules, some sort of can-bus translator. But that is way outside my wheelhouse.
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9 Second Club
Joined: Nov 2003
Posts: 13,616
Likes: 185
From: Norn Iron
As covered elsewhere....
the 24x wheel in itself is not really a limiting factor. The physical wheel may to a degree...but a billet one could sort that
RPM limit within the ecu may be....software may fix that, or there may be hardware limitations in that respect.
I would always choose a different trigger wheel, I just think the 24x is ****...but if that's what the car has and you insist on using an OEM ecu....then just do it.
the 24x wheel in itself is not really a limiting factor. The physical wheel may to a degree...but a billet one could sort that
RPM limit within the ecu may be....software may fix that, or there may be hardware limitations in that respect.
I would always choose a different trigger wheel, I just think the 24x is ****...but if that's what the car has and you insist on using an OEM ecu....then just do it.
As covered elsewhere....
the 24x wheel in itself is not really a limiting factor. The physical wheel may to a degree...but a billet one could sort that
RPM limit within the ecu may be....software may fix that, or there may be hardware limitations in that respect.
I would always choose a different trigger wheel, I just think the 24x is ****...but if that's what the car has and you insist on using an OEM ecu....then just do it.
the 24x wheel in itself is not really a limiting factor. The physical wheel may to a degree...but a billet one could sort that
RPM limit within the ecu may be....software may fix that, or there may be hardware limitations in that respect.
I would always choose a different trigger wheel, I just think the 24x is ****...but if that's what the car has and you insist on using an OEM ecu....then just do it.
9 Second Club
Joined: Nov 2003
Posts: 13,616
Likes: 185
From: Norn Iron
HP could affect crank stability...hence trigger stability, the 24x is poor there.
HP could require rpm's the factory ecu hardware cannot cope with...depends what EFILive or HPT can offer there.
OEM ecu could have boost/tuning limitations...although those would easily be worked around.
depends whether you wanted to make say 2000hp at 6000rpm, or 10,000rpm for example.
HP could require rpm's the factory ecu hardware cannot cope with...depends what EFILive or HPT can offer there.
OEM ecu could have boost/tuning limitations...although those would easily be worked around.
depends whether you wanted to make say 2000hp at 6000rpm, or 10,000rpm for example.
HP could affect crank stability...hence trigger stability, the 24x is poor there.
HP could require rpm's the factory ecu hardware cannot cope with...depends what EFILive or HPT can offer there.
OEM ecu could have boost/tuning limitations...although those would easily be worked around.
depends whether you wanted to make say 2000hp at 6000rpm, or 10,000rpm for example.
HP could require rpm's the factory ecu hardware cannot cope with...depends what EFILive or HPT can offer there.
OEM ecu could have boost/tuning limitations...although those would easily be worked around.
depends whether you wanted to make say 2000hp at 6000rpm, or 10,000rpm for example.
https://www.summitracing.com/parts/l...SABEgJ28fD_BwE
I've heard good and bad about the lpe conversion box
Last edited by ForceFedC5; Aug 30, 2018 at 04:42 PM.
Joined: Aug 2007
Posts: 24,241
Likes: 89
From: Turnin' Wrenches Infractions: 005
the bad about the box was in the initial production. I believe its been revised and they work well and are reliable. I installed one in a car 5 years ago and no hiccups to date.
9 Second Club
Joined: Nov 2003
Posts: 13,616
Likes: 185
From: Norn Iron
Perhaps I should build the engine with a 58x and use the LPE conversion box? This way if I later go to a stand alone I don't have to swap the reluctor wheel?
https://www.summitracing.com/parts/l...SABEgJ28fD_BwE
I've heard good and bad about the lpe conversion box
https://www.summitracing.com/parts/l...SABEgJ28fD_BwE
I've heard good and bad about the lpe conversion box
TECH Fanatic
Joined: Dec 2015
Posts: 1,690
Likes: 462
From: Gaylord Michigan
I am not using the factory pcm any longer. I am running an ms3 evo so depending on who you talk to that is worse lol. jk.
I am running 7.7/7.8@180-181 1/4's and been 206mph with a gm 24x reluctor. Not the billet. Its been good to me for two years straight.
From personal experience the only time Ive had issues in the past was timing control with my previous 0411 at 7,500-8,000 rpm. I ran my car for 6 months up to 7,500 without issues. Id run it out to 7,8-8,000 and pop headgaskets within seconds. 25-26 psi and 15 degrees, 12 degrees, 10 degrees ... didnt like those rpms. That is the issues Ive seen. Rpm more than power with the factory gm units.
I am running 7.7/7.8@180-181 1/4's and been 206mph with a gm 24x reluctor. Not the billet. Its been good to me for two years straight.
From personal experience the only time Ive had issues in the past was timing control with my previous 0411 at 7,500-8,000 rpm. I ran my car for 6 months up to 7,500 without issues. Id run it out to 7,8-8,000 and pop headgaskets within seconds. 25-26 psi and 15 degrees, 12 degrees, 10 degrees ... didnt like those rpms. That is the issues Ive seen. Rpm more than power with the factory gm units.
I am not using the factory pcm any longer. I am running an ms3 evo so depending on who you talk to that is worse lol. jk.
I am running 7.7/7.8@180-181 1/4's and been 206mph with a gm 24x reluctor. Not the billet. Its been good to me for two years straight.
From personal experience the only time Ive had issues in the past was timing control with my previous 0411 at 7,500-8,000 rpm. I ran my car for 6 months up to 7,500 without issues. Id run it out to 7,8-8,000 and pop headgaskets within seconds. 25-26 psi and 15 degrees, 12 degrees, 10 degrees ... didnt like those rpms. That is the issues Ive seen. Rpm more than power with the factory gm units.
I am running 7.7/7.8@180-181 1/4's and been 206mph with a gm 24x reluctor. Not the billet. Its been good to me for two years straight.
From personal experience the only time Ive had issues in the past was timing control with my previous 0411 at 7,500-8,000 rpm. I ran my car for 6 months up to 7,500 without issues. Id run it out to 7,8-8,000 and pop headgaskets within seconds. 25-26 psi and 15 degrees, 12 degrees, 10 degrees ... didnt like those rpms. That is the issues Ive seen. Rpm more than power with the factory gm units.
Mental note to set rev limiter to 7500!
