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For those with cars old enough to not have a rev contoller, this is an easy upgrade and install. It is a soft limiter and cuts spark, rotating thru firing order and increasing the number of cyclinders cut as you push harder into redline. It works on 4,6,8 cylinder engines and can be set in 1000/100 rpm increments or switched off. You just hook a wire to POS(You can use the coil POS), a wire to coil NEG, wire to ground. There is a seperate wire if you need to hook up a tach(Your stock tach should continue to work without hooking this up.) It will work with standard and HEI ignitions.

The unit



The control pots



Installed in a safe dry place




P.S. If you install one of these in a VW, remember that they like to randomly swap the color of POS and NEG wires.

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RedLanternRacing, builders of the fastest cars in last place.
Success is not an option.
1981 Scirocco, "Vera"

Finally tested under "track conditions" (Greenville) Works great. Kicks in at the set rpm with a soft limit. If I had a little screwdriver in my pocket I could have dropped another couple of tenths, with the easy adjustment.

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RedLanternRacing, builders of the fastest cars in last place.
Success is not an option.
1981 Scirocco, "Vera"

I was wondering what you were using. When I was working the start, I noticed your car had the fastest sounding rev-limiter I've ever heard. After reading your first post, it is interesting to now know why it sounded like that. Very cool.

Jim

Chuck,

Before you blow up a motor looking for a couple of tenths:

What do you base the "dropped a couple of tenths" estimate on?

If you have not done the math, you might be surprised how little time is lost from even one "extra" second on the rev limiter. For example if your rev limiter comes in at 60 mph, that is 88 feet for one second on the rev limiter. Assume you bump the rev limiter up high enough that you can AVERAGE 62 mph for that same 88 ft. (this means that you have to reach a new top speed higher than 62 due to acceleration time. You now cover the 88 ft at a rate of about 91 feet per second. The elapsed time becomes 0.968 seconds. A savings of about 3 hundredths of a second.

Of course if you are on the rev limiter multiple times on each run the hundredths can turn into tenths.

Dick

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Dick Rasmussen

FS 50 2018 Mustang GT

I have it set a 6500 now, the stock red line is 6200. I think setting to 6700(for one run, just to see the difference) would not hurt it. The last motor would pull to over 7000 and then the valves would float. After doing that several times it started leaking oil, but when I took it apart there was no rev damage. The valvetrain is solid lifter shim and bucket, it can handle some spin

I was hitting the limiter around the second slalom cone after the turn around.

I know I should just leave it alone, but I like working on the car.

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RedLanternRacing, builders of the fastest cars in last place.
Success is not an option.
1981 Scirocco, "Vera"

Boy, that sound like a certain President I know!

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Vincent Keene
'06 Ford Mustang GT (track rat)
'15 Dodge Charger R/T (yeah, it's got a HEMI!)
'07 Ford Fusion SE (205,000 miles and counting)
'98 Chevy Z-24 (retired)
'93 Acura Integra (Team SWB 24HOL Car)