View Full Version : For other Loons that want to rev past 7k
Blown3.8
10-22-2013, 02:08 PM
The Marauder seems to have a hard rev limit of 7000 rpms. Which means you can go in your tune and punch in 7200 and go out and race and it will still limit at 7k.
I am getting ready to try something out. There is a scalar in the rev/speed limiter section called "no fuel cutout switch". The description of this scalar is "This is a switch to disable any injector shut off, thus eliminating the rev limiter. This is only used in a few rare cases where the correct rev limiter cannot be found, like the 99-01 cobras and some Focus's". I have already tested this at 2k rpm. When the switch is set to 1 it did not limit the motor to 2k.
What I am then going to use as the limiter is this MSD module. MSD 6011 Modular engine controller (http://www.summitracing.com/parts/msd-6011/overview/) I believe this is plug and play, but will find that out soon. It will give you 2 rev limits a 2 step function and also a nitrous retard. Say you needed your nitrous at an inopertune time when you flick your nitrous arm switch this module will then retard your timing by your set value.
martyo
10-22-2013, 02:14 PM
I am taking out insurance on your valve train. :D
I have my concerns about the lufters all pumping up at the same time and essentially floating the valves...
Keep us posted!!!!! It isn't easy pioneering into new terriory!
RacerX
10-22-2013, 02:16 PM
Interesting. Definitely keep us up to date. I've thought this couldn't be broken through after seeing Dez Racing work on Joe's car first hand. I'd still like to know how a waste spark coil system could make any difference to what the PCM is sending out as far as signal to fire.
Blown3.8
10-22-2013, 04:06 PM
I don't think its valve float. You can watch the injectors being cut, STFT's go lean.
jflave
10-22-2013, 04:19 PM
Do you need help ($$) ? If it works it would benefit me :popcorn:
BUCKWHEAT
10-22-2013, 04:21 PM
The Marauder seems to have a hard rev limit of 7000 rpms. Which means you can go in your tune and punch in 7200 and go out and race and it will still limit at 7k.
I am getting ready to try something out. There is a scalar in the rev/speed limiter section called "no fuel cutout switch". The description of this scalar is "This is a switch to disable any injector shut off, thus eliminating the rev limiter. This is only used in a few rare cases where the correct rev limiter cannot be found, like the 99-01 cobras and some Focus's". I have already tested this at 2k rpm. When the switch is set to 1 it did not limit the motor to 2k.
What I am then going to use as the limiter is this MSD module. MSD 6011 Modular engine controller (http://www.summitracing.com/parts/msd-6011/overview/) I believe this is plug and play, but will find that out soon. It will give you 2 rev limits a 2 step function and also a nitrous retard. Say you needed your nitrous at an inopertune time when you flick your nitrous arm switch this module will then retard your timing by your set value.
Marauder loons, because of the automatic trans. My 4V stick shift cobra mustang spun to 7k happily. It's the auto trans that lives in the lower rev range.
Triple Threat
10-22-2013, 04:23 PM
I was told that Ford set that limit on the MM because the motor does not have forged parts like the Cobra.
Blown3.8
10-22-2013, 04:48 PM
Here are a couple screen shots of the log. You can see the limiter come in where the STFT start going lean.
It spins happily up to 7k with the 4R70W it just won't go over 7k.;)
LANDY
10-22-2013, 04:48 PM
This will be interesting. I'm not worried about the motor at all. The trans pump I believe would be the problem shifting that high. Either way rock on.:beer:
Blown3.8
10-22-2013, 04:52 PM
Do you need help ($$) ? If it works it would benefit me :popcorn:
Yeah John, if we need it on yours we'll get it. Gotta make sure it works like I think it should first.
Blown3.8
10-22-2013, 04:53 PM
Not really trying to shift over 7k just need the R's at the end of the track.
RR|Suki
10-22-2013, 05:35 PM
Disclaimer: sniper templates don't work 100% right so yeah...
That said I know the scalar you're talking about, and it's set to 1 or 0 whichever causes no limit, on a tune that was on my car once upon a time. There was still a rev limit with that tune in.
Like I say though, the commando software doesn't always change things and the templates have really given me fits over the years, so take with a tablespoon of salt.
RacerX
10-22-2013, 06:16 PM
My previous motor and this one were built to go up to 8k no prob. On both I've hit that same exact 7k drop. That's with the rev limiter set to 7500 and mph limit to around 200. I'm curious to know what is coded in to prevent this since I'm finding ponies of the same years hitting 8k through some research. Hmm...
Blown3.8
10-22-2013, 06:24 PM
Disclaimer: sniper templates don't work 100% right so yeah...
That said I know the scalar you're talking about, and it's set to 1 or 0 whichever causes no limit, on a tune that was on my car once upon a time. There was still a rev limit with that tune in.
Like I say though, the commando software doesn't always change things and the templates have really given me fits over the years, so take with a tablespoon of salt.
Yeah I kinda wanna test the switch at 7k before we drop 400-600 bones on a limiter that won't help. Switch did work at 2k though.
RR|Suki
10-22-2013, 07:41 PM
My previous motor and this one were built to go up to 8k no prob. On both I've hit that same exact 7k drop. That's with the rev limiter set to 7500 and mph limit to around 200. I'm curious to know what is coded in to prevent this since I'm finding ponies of the same years hitting 8k through some research. Hmm...
Are those manual cars though, or also autos?
That aside, I wonder if the hard limit at 7k is really the computer running out of processing power, running the motor + trans at that RPM. So there is some sort of fail safe that cuts the fuel first in that condition?
Maybe I'm just crazy though.
RacerX
10-22-2013, 07:50 PM
It's a 28MHz processor with enough capability. I wonder if the Ford guys just never expected anyone to try and move a heavy auto over 7k at the strip. :D No, I didn't happen to note auto or stick. Messing around with a Pony for the track is normal though too.
1stMerc
10-22-2013, 08:25 PM
Wild guess check where the torgue settings are set also.
Blown3.8
10-22-2013, 08:52 PM
Wild guess check where the torgue settings are set also.
I'll check that, but pretty sure they are all maxed out.
Mike M
10-22-2013, 10:10 PM
There would be some extra HP if you can do it. These engines can breath.
ctrlraven
10-23-2013, 05:21 AM
Interesting. Getting higher rpms would definitely benefit a good breathing built motor.
JoeBoomz
10-23-2013, 04:24 PM
Try disconnecting the tach. It's maxed at 7k, maybe it's holding the motor back?
;)
RR|Suki
10-23-2013, 04:31 PM
Try disconnecting the tach. It's maxed at 7k, maybe it's holding the motor back?
;)
:lol: I enjoyed that
Blown3.8
10-24-2013, 05:25 PM
Just checked out the fuel injector cutoff switch... it worked! 1 Pic worth 1000 words. Scared Sherm just a little when I hit it.:D ET streets swayed a little.
Bradley G
10-24-2013, 05:34 PM
Way to keep him on the edge!:P
Just checked out the fuel injector cutoff switch... it worked! 1 Pic worth 1000 words. Scared Sherm just a little when I hit it.:D ET streets swayed a little.
RacerX
10-24-2013, 05:48 PM
Just checked out the fuel injector cutoff switch... it worked! 1 Pic worth 1000 words. Scared Sherm just a little when I hit it.:D ET streets swayed a little.
Chris, where in PRP is that switch and is it just one you change?
LANDY
10-24-2013, 06:17 PM
way to go man!
Blown3.8
10-24-2013, 06:24 PM
Here ya go. Now time to order $650 worth of spark cut rev limiter.
RacerX
10-24-2013, 06:41 PM
No chit. That one little switch... Has caused some major headaches...
Thank you sir! :beer:
JoeBoomz
10-24-2013, 09:39 PM
There is an oil temperature fail safe mode that is activated at 7K, I know I've seen a scaler somewhere before to adjust the rpm this happens at. Might need calibrator access in PRP to see it.
Anyway if you get any odd behaviors above 7K, this might be the cause. Aside from the squealing the tach might make when you bury the needle! ;)
RR|Suki
10-25-2013, 09:36 AM
Haha, well count that as another fail for the Commando templates, I tried that same switch back in 2009 I think it was. I'm def leaning more and more towards moving to SCT, who knows what other settings aren't actually doing what they say they are in this software...
http://i570.photobucket.com/albums/ss143/VTRauder/CommandoFail_zps5add47d9.jpg (http://s570.photobucket.com/user/VTRauder/media/CommandoFail_zps5add47d9.jpg.h tml)
Mike M
10-25-2013, 09:42 AM
Haha, well count that as another fail for the Commando templates, I tried that same switch back in 2009 I think it was. I'm def leaning more and more towards moving to SCT, who knows what other settings aren't actually doing what they say they are in this software...
http://i570.photobucket.com/albums/ss143/VTRauder/CommandoFail_zps5add47d9.jpg (http://s570.photobucket.com/user/VTRauder/media/CommandoFail_zps5add47d9.jpg.h tml)
For a Marauder, it's useless.
RR|Suki
10-25-2013, 09:54 AM
Man tell me about it, I've been fighting with it since 2007. While my car runs pretty good, I can't help but wonder what all I'm leaving on the table/what might be so much easier if I just ditched it.
1stMerc
10-25-2013, 08:43 PM
There is an oil temperature fail safe mode that is activated at 7K, I know I've seen a scaler somewhere before to adjust the rpm this happens at. Might need calibrator access in PRP to see it.
Anyway if you get any odd behaviors above 7K, this might be the cause. Aside from the squealing the tach might make when you bury the needle! ;)
It's under "Engine Temp Limits" - Oil Temp-Scalar-Engine Speed To Enable Oil Overtemp Mode-is set at 7000
RacerX
10-26-2013, 06:35 AM
It's under "Engine Temp Limits" - Oil Temp-Scalar-Engine Speed To Enable Oil Overtemp Mode-is set at 7000
Looking at this, you could also set ECT to Enable to a much higher temp than 254 to turn on also. More good info. :beer:
Limited360
10-26-2013, 08:14 AM
Can't wait for my dongle! it comes in the mail today, then I can finally join the party for explaining my tuning approach.
lji372
10-26-2013, 08:17 AM
Can't wait for my dongle! it comes in the mail today, then I can finally join the party for explaining my tuning approach.
do we now call you james dongle?????
Limited360
10-26-2013, 08:18 AM
do we now call you james dongle?????
hmmmm I walked into this one didn't I!!!
:beer:
Blown3.8
10-28-2013, 08:09 PM
It's under "Engine Temp Limits" - Oil Temp-Scalar-Engine Speed To Enable Oil Overtemp Mode-is set at 7000
Next time at the track I will have to give modifying this a try.
Powered by vBulletin® Version 4.2.5 Copyright © 2025 vBulletin Solutions Inc. All rights reserved.