NEVER NEVER NEVER hit the rev limiter while on the juice :noway:


You'll know what the "big bang" theory is then :yes:

 

:yes:

I run a 200 shot on a well worn 468 with a msd6a and soft touch rev limiter I have hit the rev lim, more than once on the spray no problem. Not saying it's a good thing but it happens with my set up.

You've been lucky. I've seen from the least, a header blown off to the worse, A head come through the hood.... Funny thing is, The header incident was on a 150/200 two stage (both on) and the head escape was with a single 100 shot... Not sure on the limiter types with either car..

 

good question. Having been a nitrous racer for 10 years, I would suggest installing a MSD window switch. They are relatively cheap and easy to install. This will allow you a perameter for the nitrous. Good rule of thumb is to set the second chip in the window switch 200 rpms less than the rev limiter.... You'll be glad you installed it...

Chad

 

I run a 200 shot on a well worn 468 with a msd6a and soft touch rev limiter I have hit the rev lim, more than once on the spray no problem. Not saying it's a good thing but it happens with my set up.

 

Move the rev limiter. Rev limiters are to be used in the event of a driveline failure. A rev limiter is not supposed to be used 200 rpm above where you want to shift it at. If the engine can run clean to the rev limiter, then raise the rev limiter.

 

this is a great question that brings concern to my own combo. i use my rev limiter as a safty catch because i run a cast crank and the 3/8 rods. i have spun the engine 7000rpm before when i was chasing an ignition problem and didnt have the limiter on. the head/cam combo wants to rev more than the bottom end should go. i have though about a 150 shot but tire spin scares me. what is the solution?

 

this is a great question that brings concern to my own combo. i use my rev limiter as a safty catch because i run a cast crank and the 3/8 rods. i have spun the engine 7000rpm before when i was chasing an ignition problem and didnt have the limiter on. the head/cam combo wants to rev more than the bottom end should go. i have though about a 150 shot but tire spin scares me. what is the solution?

75 / 100 shot

 

You can get a fully adjustable window switch (not the MSD one) from NOS for a reasonable price.

 

My rev limiter is set 200rpm above my shift point, I have banged it only when testing where too hit the spray from. Standing stop on the spray it reved so quick I didnt catch it. And if I loose the hook I have hit it, been very lucky I know. Now I hit it about 15foot out works great.

 

Why is it bad? Unburned fuel goes out the exhaust. Window switch is a great idea, For 150 I wouldn't waste to much money on window switches, and exotic controllers. Install relays for selonoid activation, maintain bottle pressure, run seperate regulators for nitrous and carb... have fun with it. You could gain 1.0 and 10MPH

Limiters aren't only used for overreving.

 

Why is it bad? Unburned fuel goes out the exhaust. Window switch is a great idea, For 150 I wouldn't waste to much money on window switches, and exotic controllers. Install relays for selonoid activation, maintain bottle pressure, run seperate regulators for nitrous and carb... have fun with it. You could gain 1.0 and 10MPH

Limiters aren't only used for overreving.

These guys that use the rev limiter to shift are DUMB

They leave then BOP BOP BOP shift and so on

The rev limit is where your at 7000rpm in low gear and drive shaft fails or tires spin so you dont go 10,000rpm+ not to shift

Yes they can be used for leave rpm and burnout protection but you dont need it if you do the burnout correctly and not zing the engine RPMS to the max

We can do a good burnout and never go over 6000rpm but we shift at 7800rpm