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dublin14, on 25 May 2012 - 10:05 AM, said:
Ive never seen a white block make HP on a dyno graph over 7000rpm no matter what it had done.
Mine did when it had the T67 on it. Power was still climbing at 7500.
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In Topic: Revised Tune & Newer Oil Pan W/Oil Cooler
24 May 2012 - 08:40 PM
maciekb2002, on 24 May 2012 - 03:02 AM, said:
Just tell me how the f... Company as big as spec missed that little fact that springs can be pushed to far.
Parts they use are some cheap mexican junk . It probably has that globe logo on it.
Parts they use are some cheap mexican junk . It probably has that globe logo on it.
To me, it looks more like that clutch it meant to be used with a normal flat flywheel. You can't slag Spec for that.
In Topic: Revised Tune & Newer Oil Pan W/Oil Cooler
22 May 2012 - 10:31 PM
scumcity14, on 22 May 2012 - 10:02 PM, said:
A slipping clutch under accel will not allow an over rev...MissIng a shift (from 4-3 instead of 4-5) will over rev and rev limiter will not stop the transmission from spinning the engine too fast..no matter what.
Absolutely. I don't think that's the scenario being claimed here, however.
In Topic: Revised Tune & Newer Oil Pan W/Oil Cooler
22 May 2012 - 06:49 PM
lookforjoe, on 22 May 2012 - 04:07 PM, said:
Well I guess I'm just stupid then. You still haven't indicated how any rev limiter (on a Motronic ECU) is going to restrict the engine from free- revving if the clutch slips under load as mine did. As far as I can see, there is nothing that will prevent the engine from continuing to rev if the throttle is held open even for an instant once the clutch is no longer engaged..
You've gotta be shitting me. You seriously can't grasp that even free revving, if an engine is revving up, hits 8400rpm, and fuel is cut,
fischmama, on 22 May 2012 - 06:39 PM, said:
If I remember correctly Motronic uses Spark cut as its rev limiter, maybe fuel cut as a secondary hard limiter. Not sure if thats still the case with TT. I can see that the engine can maybe go 100-200 RPM past that but when spark is cut (and fuel) the engine will not rev higher (unless the fuel self ignites which it shouldn't).
I have three limiters set on MS and they all work and won't let me over rev the engine. I have a soft limiter that retards timing, then spark cut and fuel cut after that. It never gets to the fuel cut limiter.
Please correct me if I'm wrong but thats how I remember Motronic to handle the rev limiter.
I have three limiters set on MS and they all work and won't let me over rev the engine. I have a soft limiter that retards timing, then spark cut and fuel cut after that. It never gets to the fuel cut limiter.
Please correct me if I'm wrong but thats how I remember Motronic to handle the rev limiter.
Exactly. The flywheel does have some inertia, so in some cases it could be possible to get a 100-200rpm bump post-fuel cut - but it takes actual ENERGY input to accelerate the crankshaft, pistons, etc.In fact it takes energy even to hold them at a constant rpm. When you cut the fuel, it's like switching the key off. The engine speed is not going to continue to rise 1200rpm. I won't call you stupid, but if you actually think that the engine speed could continue to rise that much after cutting the fuel... you definitely don't have your head wrapped around the dynamics involved. 2-step rev limiters don't even cut fuel or spark completely, and they are able to hold an engine at a fixed rpm, they don't way overshoot. That would be ridiculous. Rev limiters in general would be basically pointless. When you cut the fuel, it's like hitting a wall.
