• Hi Guest!
    You can help ensure that British Car Forum (BCF) continues to provide a great place to engage in the British car hobby! If you find BCF a beneficial community, please consider supporting our efforts with a subscription.
    There are some perks with a member upgrade!
    **Upgrade Now**
    (PS: Subscribers don't see this gawd-aweful banner
Tips
Tips

Rev limiters

Share this page

The RPM bosch rotor "throws " out a piece that at a certain RPM grounds the system ,

MSD has a set-up , I think called soft touch which kills the spark at one plug at a time

With the MSD stuff you can set a shift light RPM , and with another box set a soft touch rpm

But it will still not help if you are down shifting and over rev /bcforum/images/%%GRAEMLIN_URL%%/smile.gif

Beaulieu
 
Dave--

I don't know if your guy is building up a 1622 but if so and you are interested in reconditioned parts let me know.

The rods were inspected by Carillo--three are undamaged and can be fully reconditioned for about $70 each and a matching fourth is available from them. I also sent the pistons back to Venolia for inspection--undamaged according to them.
 
Michael Oritt said:
Dave--

I don't know if your guy is building up a 1622 but if so and you are interested in reconditioned parts let me know.

The rods were inspected by Venolia and and three are undamaged and can be fully reconditioned for about $70 each and a fourth is available from them. I also have the Carillo pistons--undamaged according to the Carillo folks.
Click to expand...
I'll call Steve Ellis, have a chat with him & let you know.

Sounds interesting!
 
nNothing to do with rev-limiters, but...I don't know if anyone would be interested or even if it is a desirable item, but I still have the set-up for a Capacitive Discharge system. It has to be an antique! I've had it for 20 years!! Brand new in the box.
 
I sold two really nice Electromotives to go vintage racing, so a big fat no to electromotives, you might get by with one at HSR, but you're asking for trouble.

I tried the MSD soft touch, I hated it.
 
Hap, I love my Electomotive! But, I also have one of the good pickups.
If I set one of these cars up for vintage, it'll be with an MSD 7AL2.
Jeff
 
Oh, I have nothing to say bad about Electromotives, I love them, simple and good, I never had pick up problems, I used the Huffaker 3/8 pick up, but I think the 1/2 Electromotive pick up is just as good though and cost less. If I could run it in vintage I would have never sold it. I have a new points Aldon dizzy I horsetraded for, I'm going to send it off to my distributor buddy Jeff at Advanced Distributors and let him see if he can improve the Aldon, I going pretty simple with my vintage car, it definitely going to be a KISS formula, but I think it will suprise alot of folks, showing them you don't need fancy ignitions, Webers and 1380s to win in vintage.
 
Hap, the KISS idea is my plan, too. I've got a .040 over 1275 sitting here, with a nice head, courtesy of Joe, and a new Aldon for it. I don't know what I'll run for a cam, and I've got a set of prepped HS4s on a reworked B manifold. Nothing fancy, just good old reliable horsepower. /bcforum/images/%%GRAEMLIN_URL%%/grin.gif
Jeff
 
Bugeye58 said:
I've got a .040 over 1275 sitting here, with a nice head, courtesy of Joe, and a new Aldon for it. I don't know what I'll run for a cam
Click to expand...

Might I suggest a Comptune HL12, that's a great 1275 cam, been around for ever, won more FP championships than you can shake a stick out.

.366" lobe lift. (we run them with 1.5 rollers)
298 advartised duration
261 durtion at .050"
102 center line ( we advnced that about 3 degrees )

You probably know Peter Morton, that what we used in his motors, that's what Harold Flescher, Craig Chima and many others have used over the years. I an get you one, I also have the oversized valve springs recommended to run with these, your Huffaker head may already have these on them, the retainers are normally gold in color, and the spring is visably larger in diameter that stock.
 
I'll keep that in mind when the time comes Hap, but Dave Sr. and I had our differences, and Comptune never left me with a "warm fuzzy".
Yeah, I know Peter and Craig both, and have spoken to Harold a couple of times. (Peter and Jen just had another baby on the 18th. Named her Hayley, to go with their son Austin!)
I can't remember what springs are on that head, and it's too cold to run out and look.
Are more vintage groups allowing roller rockers now? I know at one time they were frowned on. I've got some of Peter Dodds' 1.5:1 forgings lying around if I have to run conventionals.
Jeff
 
A foolproof but hard to find rev limiter is the Lucas rotor fitted to Lotus engines - set for 6500 RPM but adjustable if you have a distributor machine.

I often used one on my Twincam when I was breaking it in before removing it and relying on the MSD chip (set at a higher RPM)
 
Bugeye58 said:
Are more vintage groups allowing roller rockers now? I know at one time they were frowned on. I've got some of Peter Dodds' 1.5:1 forgings lying around if I have to run conventionals.
Jeff
Click to expand...

Jeff,

All but the most stringent allow them. I believe, but I'm not positive, that VSCCA on the east coast and and I think SOVREN on the west coast don't allow them.
 
billspohn said:
A foolproof but hard to find rev limiter is the Lucas rotor fitted to Lotus engines - set for 6500 RPM but adjustable if you have a distributor machine.

I often used one on my Twincam when I was breaking it in before removing it and relying on the MSD chip (set at a higher RPM)
Click to expand...

FWIW... Dave Bean Engineering lists two different rev limiting rotors for Lucas Distributors. Both list a 7,000rpm limit.
 
swift6 said:
FWIW... Dave Bean Engineering lists two different rev limiting rotors for Lucas Distributors. Both list a 7,000rpm limit.
Click to expand...

Yeah - the original for Elans was set at 6500 but it is a really neat bit of gear with springs allowing a weight to slide out and hit a grounded tang, shorting out the ignition - very 'soft touch' in effect.

You can adjust the RPM that it hits the short out tang by adding or removing weight (in the form of little screws) to the moving weight. Heavier means it limits lower, lighter means it takes a higher RPM to get it out to the tang.
 
They are precious too. They list for $35 and $72. For just the rotors. /bcforum/images/%%GRAEMLIN_URL%%/smile.gif
 
swift6 said:
They are precious too. They list for $35 and $72. For just the rotors. /bcforum/images/%%GRAEMLIN_URL%%/smile.gif
Click to expand...

But that's all you need in terms of gear- a fraction of the price of any other rev limiter you care to name.

I have found them to be very reliable - stick it in and forget about it.
 
Back
Top