For the first time and rev limite
Discussion
today for the first time since i had the S3C i let her have it good and proper, what a buzz. i didnt want to get out of her, awesome.
Being more used to bikes which rev out to 14k+ i find i keep bouncing the TVR of the limiter! trouble is the limiter is so vicious, is this right?
http://homepage.ntlworld.com/mikebatty/
Be VERY careful not to over rev the engine, 2.9 V6's are very easy to destroy by over reving. Make sure the limit is no more than 6K rpm. The con-rods on the 2.9 V6 are not much larger than Sierra 2.0 con-rods and bend easilly.
I have never found the standard ECU rev limit on my S2, but I have installed a seperate limiter from 'Omex' and have set it to 6K rpm with the shift light set to 5.5K rpm. The Omex limiter is a soft-cut rev limiter which means it gradually cuts the ignition pulses as you approach the limit. The standard ECU rev limiter MAY be hard-cut which cuts the ignition totally upon reaching the RPM limit.
As I mentioned, I have never found the standard ECU limiter and cannot say for definite if it even has one, it could even be that you have experienced valve-bounce.
What is the RPM on the tacho saying when you hit the limit on your S3?
Jas.
I have never found the standard ECU rev limit on my S2, but I have installed a seperate limiter from 'Omex' and have set it to 6K rpm with the shift light set to 5.5K rpm. The Omex limiter is a soft-cut rev limiter which means it gradually cuts the ignition pulses as you approach the limit. The standard ECU rev limiter MAY be hard-cut which cuts the ignition totally upon reaching the RPM limit.
As I mentioned, I have never found the standard ECU limiter and cannot say for definite if it even has one, it could even be that you have experienced valve-bounce.
What is the RPM on the tacho saying when you hit the limit on your S3?
Jas.
Yes, the ECU does have a rev limiter and it does suddenly cut the engine when you hit it.
The engine restarts immediately when you drop below the limit again. It is somewhere around 6k rpm. I have hit it (accidentally) a couple of times (unnerving on a track day).
The 2.9 is not a high revving engine and there's no useful power right up the top end.
>> Edited by Roy C on Tuesday 12th March 07:46
The engine restarts immediately when you drop below the limit again. It is somewhere around 6k rpm. I have hit it (accidentally) a couple of times (unnerving on a track day). The 2.9 is not a high revving engine and there's no useful power right up the top end.
>> Edited by Roy C on Tuesday 12th March 07:46
Only hit it twice, both times in 2nd trying to get past someone.
It is viscous and comes in over 6k, about 6.5k I think. Both times it scared the hell out of me as the car cuts out and then back in.
It then let off the most incredible back fire as all this fel was sitting in the exaust unignited
!
Cheers
Mark
It is viscous and comes in over 6k, about 6.5k I think. Both times it scared the hell out of me as the car cuts out and then back in.
It then let off the most incredible back fire as all this fel was sitting in the exaust unignited
! Cheers
Mark
When I bought a new distributor arm for my S1 it contained some sort of sprung rev limiting device. On using it, it cut in at about 5k and scared the pants off me. So I took it off and put the old one back on.
Reading your messages makes me wonder whether there is an additional rev limitor in the ECU or equivilant for the S1. Any ideas anyone?
Reading your messages makes me wonder whether there is an additional rev limitor in the ECU or equivilant for the S1. Any ideas anyone?
Not sure about the S1 and a distributor sprung device (apart from the advance mechanism?) as a limiter.
IMHO I believe all S's to have rev limiters set to operate between 5600 and 6500 rpm, dependant on model/year/spec. On older cars it limits the revs by cutting the LT circuit, hence flames on a hot engine. Anything later with cats it will 'limit' by cutting the injector pulses to starve the engine of fuel, this stops it poisoning the cat.
As has already been said to rev up to this point on most engines is pointless as the power is starting to drop off the 'curve', it is there to protect the engine and in some cases the ancillaries from spinning themselves to bits.
Potentially more damage will be done by exceeding the limit by coming down through the box too early
It aint clever like a WRC/F1 electronic box, you're the clever bit in the loop, or the nut on the wheel
Harry
IMHO I believe all S's to have rev limiters set to operate between 5600 and 6500 rpm, dependant on model/year/spec. On older cars it limits the revs by cutting the LT circuit, hence flames
on a hot engine. Anything later with cats it will 'limit' by cutting the injector pulses to starve the engine of fuel, this stops it poisoning the cat. As has already been said to rev up to this point on most engines is pointless as the power is starting to drop off the 'curve', it is there to protect the engine and in some cases the ancillaries from spinning themselves to bits.
Potentially more damage will be done by exceeding the limit by coming down through the box too early
It aint clever like a WRC/F1 electronic box, you're the clever bit in the loop, or the nut on the wheel
Harry
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