808rota

when useing msd 6al on the leading only,can and will it be safe to use the revlimiter

trochoid

iTrader: (6)

Sure, but it won't limit the trailing, which won't insure the engine from reving past the set limit on the leading.

808rota

so in other words it wont limit the rev you set????

trochoid

iTrader: (6)

You can add a 2nd rev lmiter for the trailing, not sure if you need one for each trailing plug, or disable the trailing entirely. You'll need to make some wiring changes since the tach and fuel pump are tied into the trailing.

808rota

i guess that won't matter because i got an aftermarket fuel pump and tac...what will happen to the performance if i dissable the trailing????

808rota

Jaime Enriquez

I'm not sure if it causes engine damage, but I have the 6AL on the leading with the 8500 plug. Basically, when I hit 8500, power loss is dramatic and sudden. Shift.

Haven't had a problem in 5 years. I don't hear detonation, it just drops power.

808rota

you think it would work with a 2 step...for launch/of the line

Jaime Enriquez

I don't think so...you'd need the 3 box setup I believe (1 L, 2T)

1BADSP

iTrader: (4)

you only need 3 boxes on 2nd and 3rd gens because of the waste spark,i am using 2 6al boxes,a 1980 distributor,and 2, 2 step modules,that way i can control both leading and trailing

Jaime Enriquez

Thanks for that!...and I think I do have one of those dizzys somewhere!

808rota

is that 1980 distributer points???is that why they call it dizzy??

1BADSP

iTrader: (4)

no points,i use the 80 dist because it uses a harness that plugs into ignitors on the strut tower,unplug it from the factory ignitors and plug it into the 6al boxes.

trochoid

iTrader: (6)

Disabling the trailing will make very little difference in performance. Trailing spark helps clean up emissions more than anything else.

808rota

I got a 13b 6port with a 48 ida, headers,and a msd6al with a 2 step.what would be an ideal launch rpm pill and rev limit pill?this car will be raced occasionally just for fun.

Jobro

iTrader: (2)

I'm thinking, 7800rpm would be a nice top rpm limit, and 4000 should be fine for launch because it will be somewhere around peak torque.

808rota

Do I have to cut the red and blue loop for the revlimit to work?

trochoid

iTrader: (6)

Setting the rpm launch limit is full of variables, hp, tire size, track conditions/grip level, gearing. It will take a bit of testing and one setting won't be valid for every race. Testing between 4-5k would be a good place to start.

808rota

well my 2step is not working. I have a 5000 pill on and the car still revs??

trochoid

iTrader: (6)

Disable your trailing ignition and see what happens.

808rota

yes it works!! But the positive and negative connections on the trailing coil is arcing across . What to do ? Dissconnect

trochoid

iTrader: (6)

Yep, that's the easiest way.

808rota

thanks alot guys!so are you sure it's ok to run just leading.?

FBsliderseven

iTrader: (2)

running just the leading should be fine.
i ran my car for a couple of days with out the trailing (waiting on new plugs) and it ran fine. cant really tell the difference in performance either.
hehe i run a single msd box for leading.

Man_in_black49464

iTrader: (1)

http://www.amazon.com/Pertronix-600-.../dp/B000CC9DAY

Any thoughts on this item to use and what cylinder setting would we use?