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First thing is I dont want someone to come on here and say ‘thats not launch control’.
yes, this IS launch control that I installed and you can install it too on your manual trans c4.
it doesnt need to have an electronic brain or a ferrari emblem on it to do what I am doing here.
This $219 item accomplishes the same task that $xxxxx launch control options do on modern ferraris, corvettes, prob even bugattis.
So with that out of the way. I installed a clutch tamer (the mechanical version) which is basically a hydraulic screen door cylinder that prevents you from slamming a door (or clutch) when releasing either from a full stop. It doesnt activate unless you have the clutch to the floor and release it from a full stop - so in normal driving, it doesnt slip the clutch. (Same with after you have launched at the track, maybe you dont want slip at the 2-3 and 3-4 shift, so you just dont press the pedal to the floor )
I had to remove the clutch pedal assembly and drill it for the pedal bracket after i determined the best location for the bracket (using a vice grip to hold it). The best position for the bracket was as high as I could physically put it. I also had to reroute some wires and the flasher relays that were in the cylinders path of travel.
i am using the ‘muscle car’ version of clutch tamer which has a less intrusive bracket design that can be bolted to alum kick panel. Since i have my kick panel all cut-up for gages that come thru the kick panel, i built an extra reinforcement bracket behind the kick panel to make up for some of the material I removed.
I did some test runs on this, on a rural tar chip country road and was surprised how I am not bogging as much on the launch. I am still dialing this in and plan to use it at the dragstrip this spring I did catch a whiff of some clutch smell. However, thats the price you pay and replacing/ resurfacing a clutch every season or two is part of racing.
Many here are gonna see this and say ‘no thanks’ and thats understandable if you dont ever dragstrip a 6spd c4 on sticky tires and prep track surface.
If you do, you know that broken stub ends and bogging at launches plaque the c4 and can prob see how this would help out
Last edited by dizwiz24; Dec 26, 2024 at 02:36 PM.
This $219 item accomplishes the same task that $xxxxx launch control options do on modern ferraris, corvettes, prob even bugattis.
It doesn't. My god it doesn't.
Your persistence on bringing a hammer to surgery to claim it does the same thing as a scalpel is absolutely embarrassing at this point.
I applaud your effort on launch control, but a screen door cylinder that helps slow your clutch release is NOT the same thing as an electronic system that introduces a 2-step rev limiter with multiple level timing and traction controls (and that's just getting started). A fully programmable closed-loop launch control system with a dozen parameter inputs is not the same thing as a mechanical clutch delay.
Just to get them even in the ballpark of comparable, your setup here would have to be able to read tire slip and acceleration to be able to automatically adjust the rate of release, then you would have to add a configurable 2-step like an N2MB WOT box to help you precision control launch RPM and a way to retard timing for when the clutch is fully released and the tires are still spinning. You have a crude piece of the equation at best.
...well, this may not be the modern definition of and the electro wizard-ry that you mention but, as he describes it, it does seem to control his launch.
it may be more of a pocketknife compared to the scalpel in your comparison.
Last edited by 2011KLR; Dec 26, 2024 at 04:25 PM.
Reason: added pocketknife joke so maybe Joe wont light me up
...well, this may not be the modern definition of and the electro wizard-ry that you mention but, as he describes it, it does seem to control his launch.
it may be more of a pocketknife compared to the scalpel in your comparison.
This is what I am trying to avoid at the track.
I did a test launch on it this afternoon and I didnt bog like i usually do
It doesn't. My god it doesn't.
Your persistence on bringing a hammer to surgery to claim it does the same thing as a scalpel is absolutely embarrassing at this point.
I applaud your effort on launch control, but a screen door cylinder that helps slow your clutch release is NOT the same thing as an electronic system that introduces a 2-step rev limiter with multiple level timing and traction controls (and that's just getting started). A fully programmable closed-loop launch control system with a dozen parameter inputs is not the same thing as a mechanical clutch delay.
Just to get them even in the ballpark of comparable, your setup here would have to be able to read tire slip and acceleration to be able to automatically adjust the rate of release, then you would have to add a configurable 2-step like an N2MB WOT box to help you precision control launch RPM and a way to retard timing for when the clutch is fully released and the tires are still spinning. You have a crude piece of the equation at best.
with my method, if i smell clutch - i adjust the outer **** (release rate) of the cylinder
if i smell tire, i adjust the inner dial (where the the delay-cylinder kicks in at during the stroke)
Proper launch control is a curious thing. Like the tail wagging the dog, if you know what I mean. In the most simple terms the driver controls the vehicle. In reality, the driver provides inputs which are hopefully aligned with his intentions. Competing control systems must be arbitrated somehow. In order to really impact the vehicle's performance you must have a great control system and also win the arbitration game.
Proper launch control is a curious thing. Like the tail wagging the dog, if you know what I mean. In the most simple terms the driver controls the vehicle. In reality, the driver provides inputs which are hopefully aligned with his intentions. Competing control systems must be arbitrated somehow. In order to really impact the vehicle's performance you must have a great control system and also win the arbitration game.
There is the valid argument that ‘just release the clutch pedal slower” and thats exactly what i was trying to do when i broke that outer axle stub end
so somehow that didnt work for me. So thats why I am going to try this
a few mcleod street twin users, like myself, have also broken parts
there is an electronic solenoid version of the clutch tamer
would be nice to cordinate that with the wheel speed sensors of the abs
I did not see it on their website
Using the factory ASR button to turn on and off launch control would be nice. I am guessing simply reducing the throttle back times when wheel slip occurs to milliseconds and limited to rpm.
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Installed launch control on the 1993 6spd
