| [ Total Views: 1292 | Total Replies: 4 | Thread Id: 24025 ] |
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 speedster356
A.k.a.: Peter Mcleod
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| posted on June 7th, 2004 at 07:48 PM |
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Speed cut EJ20T?
Anyone have a cure for my speedcut at 180kph. This is a Japanese spec ECU (stock Subaru). This happens at 170something kph road speed as I found out
at the drags, starts with what feels like rev limit then just cuts all fuel. I might be able to replace my existing Subaru VSS with an aftermarket
sensor that has half as many pickups, this might fool the ECU? What do you think?
[Edited on 7-6-2004 by speedster356]
Spyder-WISD 07-09-05 11.6s @ 125 MPH
Speedster-WISD Nats 05 14.4s @ 89 MPH
Jet cruiser-Coogee 22-09-05 900 deg C @ 110,000 rpm
Weaseling out of things is what separates us from the animals....................Except the Weasel.
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seagull
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| posted on June 7th, 2004 at 09:54 PM |
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I was told my auto ecu * stock subaru * should not have the problem .
I think back some where here there was some imput to this problem .
I can not see my self needing to go more than 130ks on my trike !
Looking for that special lady : PM me for coffee & cake
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speedster356
A.k.a.: Peter Mcleod
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| posted on June 7th, 2004 at 10:06 PM |
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Mine is also from an auto. The auto module has been unplugged and removed, just leaving the engine ECU.
[Edited on 7-6-2004 by speedster356]
Spyder-WISD 07-09-05 11.6s @ 125 MPH
Speedster-WISD Nats 05 14.4s @ 89 MPH
Jet cruiser-Coogee 22-09-05 900 deg C @ 110,000 rpm
Weaseling out of things is what separates us from the animals....................Except the Weasel.
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555bug
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| posted on June 7th, 2004 at 11:56 PM |
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places like MRT sell speed cut limiters for not much cash but you are exactly right just half teh output pulse to fool the cpu. I think there may
have been an article in autospeed about this but I'm not 100% perhaps a search of the site. What happens if you unplug the speed sensor? just out
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seagull
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| posted on June 8th, 2004 at 12:06 AM |
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I tell you as soon as I finsh it .
Looking for that special lady : PM me for coffee & cake
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speedster356
A.k.a.: Peter Mcleod
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Plastic not Classic Racing
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Mood: Producing boost again in NZ
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| posted on June 8th, 2004 at 07:57 AM |
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I believe it upsets idle and low speed running. It may also effect AFR at higer RPM?, I'm not sure. Speed cut defenders are in the 300 paso mark.
Jaycar have a kit coming out in september for $44, so that seems to be the go. Check the jaycar site, they have quite a few automotive kits going.
http://www.jaycar.com.au
Spyder-WISD 07-09-05 11.6s @ 125 MPH
Speedster-WISD Nats 05 14.4s @ 89 MPH
Jet cruiser-Coogee 22-09-05 900 deg C @ 110,000 rpm
Weaseling out of things is what separates us from the animals....................Except the Weasel.
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Baja Wes
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| posted on June 8th, 2004 at 01:17 PM |
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just use less magnets.
The ECU runs different mapping if it thinks the car is moving, or so I am led to believe. Apparently the subaru's also shutdown the engine if it
detects it is at full load and not moving for too long.
I have my Mazda speed sensor running at a different ratio to the wheels than the standard mazda set-up, so when I am doing 260kph the ECU thinks I am
only doing 180kph. So my speed limiter is changed to 260kph. Of course I won't get near either of those.
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