Rev limiter
Le Mans Master
Joined: Oct 2006
Posts: 7,123
Likes: 433
From: Gladstone MO
C3 of Year Finalist (appearance mods) 2019
He's not picking on you, he's protecting himself from an unhappy customer. If it over rev's and something breaks, you'll be going back unhappy. I just got a Summit branded CD ignition with rev limiter- Instruction sheet shows HEI and it was $159.
Team Owner
Joined: Apr 1999
Posts: 21,953
Likes: 1,445
From: Reno Nevada
2024 C3 of the Year Finalist- Modified
Get the Crane Cams Multi Spark unit. It is a digital sequential misfire. The rpm is set by a dial and not some phony plug in resisters that might be off a few 100 rpm.
I have so much faith in mine that I drive it into the rev limiter with my foot on the floor into the braking zones
I have so much faith in mine that I drive it into the rev limiter with my foot on the floor into the braking zones
Le Mans Master
Joined: Jan 2004
Posts: 8,295
Likes: 30
From: one night in Bangkok you are never lonely
Get the Crane Cams Multi Spark unit. It is a digital sequential misfire. The rpm is set by a dial and not some phony plug in resisters that might be off a few 100 rpm.
I have so much faith in mine that I drive it into the rev limiter with my foot on the floor into the braking zones
I have so much faith in mine that I drive it into the rev limiter with my foot on the floor into the braking zones
Thread Starter
Le Mans Master
Joined: Jan 2006
Posts: 6,504
Likes: 139
From: Butler Pa
Team Owner
Joined: Apr 1999
Posts: 21,953
Likes: 1,445
From: Reno Nevada
2024 C3 of the Year Finalist- Modified
This is what I have. The also have the single stage lower priced versions.
http://www.cranecams.com/index.php?s...lvl=5&prt=1972
http://www.cranecams.com/index.php?s...lvl=5&prt=1972
Le Mans Master
Joined: Jan 2004
Posts: 8,295
Likes: 30
From: one night in Bangkok you are never lonely
This is what I have. The also have the single stage lower priced versions.
http://www.cranecams.com/index.php?s...lvl=5&prt=1972
http://www.cranecams.com/index.php?s...lvl=5&prt=1972
Pro
Joined: Dec 2005
Posts: 596
Likes: 1
I put a nice kit on my dist. made by MSD. Cap, rotor, coil, cover, and a rev limiter (manual adjustable) built into the module. Got it from Summit-- Part MSD-8501 for @ 180.00.
I'll never get used to hitting a rev limiter. Don't do it often, but it scares the hell out of me!!
I'll never get used to hitting a rev limiter. Don't do it often, but it scares the hell out of me!!
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Thread Starter
Le Mans Master
Joined: Jan 2006
Posts: 6,504
Likes: 139
From: Butler Pa
I put a nice kit on my dist. made by MSD. Cap, rotor, coil, cover, and a rev limiter (manual adjustable) built into the module. Got it from Summit-- Part MSD-8501 for @ 180.00.
I'll never get used to hitting a rev limiter. Don't do it often, but it scares the hell out of me!!
I'll never get used to hitting a rev limiter. Don't do it often, but it scares the hell out of me!!
One thing mentioned in the instructions for this kit has me a little confused.
"TRACTION CONTROL DETECTION
The Digital HEI Module has a unique Traction Control Detection (TCD) code built into its
microprocessor. This technology carefully monitors and examines the signals of the ignition. If the
TCD determines that any signal has been modified in any way, the ignition will be put into a low
rpm rev limit mode to immediately slow the car. Before this rev limit is imposed, the TCD goes
through a list of cycles and checks to qualify that the trigger has been modified. There is no way to
bypass or deactivate the TCD circuitry."
Is this good or bad?
Race Director
Joined: Dec 1999
Posts: 19,610
Likes: 778
From: Forked River NJ
I am running the single stage Crane HI6 as Gkull suggests above. I have bounced it off the limiter many times and it works great. I tried it at 4000 rpm when it was new and just left my foot on the floor to see if it would gain any rpm and it stayed right at 4000 rpm. Still use it with my MSD dist.
Pro
Joined: Dec 2005
Posts: 596
Likes: 1
This is news to me--- I didn't see that in myinstructions, and it may be a new feature. As to bad or good-- I think it would be good for your engine, and your fenders, if you had a slow down feature. It might prevent you from doing some mad drifting or burnouts, but my car won't do either.
Thanks for pointing that out- I'm curious and now I'm going to pull my directios out and double check.
Ok- I DO have that feature, but to my knowledge have never activated it. I'm going to call MSD tech and see what's up and how this works. I don't know how the module could detect a traction issue without ABS sensors. sensors around the drive train, differential, etc. , like the new cars have???????
OK- Spoke with MSD- The TCD is built in to detect any kind of traction control device in use on a car. This is to assure that there's no CHEATING going on in some racing applications. If it detects some traction devices, usually a timing/wheel speed sensor, it will slow an engine.
When used on a street car, or older car like ours, it will have no affect.
You're not running a circle track car with traction control, are you??
Thanks for pointing that out- I'm curious and now I'm going to pull my directios out and double check.
Ok- I DO have that feature, but to my knowledge have never activated it. I'm going to call MSD tech and see what's up and how this works. I don't know how the module could detect a traction issue without ABS sensors. sensors around the drive train, differential, etc. , like the new cars have???????
OK- Spoke with MSD- The TCD is built in to detect any kind of traction control device in use on a car. This is to assure that there's no CHEATING going on in some racing applications. If it detects some traction devices, usually a timing/wheel speed sensor, it will slow an engine.
When used on a street car, or older car like ours, it will have no affect.
You're not running a circle track car with traction control, are you??
Last edited by Restorod '79; May 18, 2007 at 11:34 AM.
Thread Starter
Le Mans Master
Joined: Jan 2006
Posts: 6,504
Likes: 139
From: Butler Pa
Pro
Joined: Dec 2005
Posts: 596
Likes: 1
Got it! (See above post )
Also, if your dist. is new and you just want the control, I agree with Gkull, get the Crane or the MSD 6AL. These are the industry standard, used in every race car built across the country, and every hot-rod I've seen.
)Also, if your dist. is new and you just want the control, I agree with Gkull, get the Crane or the MSD 6AL. These are the industry standard, used in every race car built across the country, and every hot-rod I've seen.
Last edited by Restorod '79; May 18, 2007 at 11:47 AM.
Thread Starter
Le Mans Master
Joined: Jan 2006
Posts: 6,504
Likes: 139
From: Butler Pa
Team Owner
Joined: Apr 1999
Posts: 21,953
Likes: 1,445
From: Reno Nevada
2024 C3 of the Year Finalist- Modified
Crane is digital. MSD also has their digital line. 6AL is not a good item.
Racer
Joined: Oct 2004
Posts: 285
Likes: 0
From: Stockholm
Intresting thread!
Hope it's ok if I hijack it.....
I'm also looking for a rev limiter.
Today I have a MSD 6A (without rev limiter) but with my new engine I really need something stopping me from rev over 7000 rpm.
Is the Crane HI6 compatible with my dist MSD MSD-8458 (nearly the same as MSD-8571) and a regular coil?
I have also looked at Accel 300+ and Holley Annihilator 75.
Is there any differens between the boxes or are they all the same?
Hope it's ok if I hijack it.....
I am running the single stage Crane HI6 as Gkull suggests above. I have bounced it off the limiter many times and it works great. I tried it at 4000 rpm when it was new and just left my foot on the floor to see if it would gain any rpm and it stayed right at 4000 rpm. Still use it with my MSD dist.
Today I have a MSD 6A (without rev limiter) but with my new engine I really need something stopping me from rev over 7000 rpm.
Is the Crane HI6 compatible with my dist MSD MSD-8458 (nearly the same as MSD-8571) and a regular coil?
I have also looked at Accel 300+ and Holley Annihilator 75.
Is there any differens between the boxes or are they all the same?
Race Director
Joined: May 2005
Posts: 10,674
Likes: 122
From: Millington Illinois
St. Jude Donor '08-'09
The 6 AL is prone to failure. I bought the 6 ALN. The N is the Nascar vesion. The internals are totally encased in a clear gel and it has vibration isolators built in and on the mounts. It isolates the internals from excessive heat, vibration and shock which kills the 6 AL. I ran mine for 2 years with no issues and it's going back in the new build. Pretty nice option and priced not much different than the 6 AL.
Racer
Joined: Apr 2005
Posts: 464
Likes: 0
From: Charleston South Carolina
Team Owner
Joined: Apr 1999
Posts: 21,953
Likes: 1,445
From: Reno Nevada
2024 C3 of the Year Finalist- Modified
Intresting thread!
Hope it's ok if I hijack it.....
I'm also looking for a rev limiter.
Today I have a MSD 6A (without rev limiter) but with my new engine I really need something stopping me from rev over 7000 rpm.
Is the Crane HI6 compatible with my dist MSD MSD-8458 (nearly the same as MSD-8571) and a regular coil?
I have also looked at Accel 300+ and Holley Annihilator 75.
Is there any differens between the boxes or are they all the same?
Hope it's ok if I hijack it.....
I'm also looking for a rev limiter.
Today I have a MSD 6A (without rev limiter) but with my new engine I really need something stopping me from rev over 7000 rpm.
Is the Crane HI6 compatible with my dist MSD MSD-8458 (nearly the same as MSD-8571) and a regular coil?
I have also looked at Accel 300+ and Holley Annihilator 75.
Is there any differens between the boxes or are they all the same?
MSD 6AL....... are bad. It's a 20+ year old bad design of random misfire. It is anolog, power sucking, prone to heat failure, can leave you stranded, phoney plugin rpm limiters. Any one that buys one.....well I won't go into that
Last edited by gkull; May 20, 2007 at 03:14 PM.