7531

[292law]

Guys, Just started an engine with a new 7531 and won't rev past 6500?
I have set the rev max:-
out cam
rpm 8500
adj off

no retards are set. I am using a msd crank trigger
Any help is appreciated,

[msdtech1955]

did we check rotor phasing ?

also, did you mess with the slew rate?

[292law]

rotor phasing appears to be good. If it is out a touch, it still won't stop it from revving more.
RPM slew is set at:-
(1) 6200
(2) 3200
(3) 1900
(4) 1400
(5) 1200
(6) 1000
These values i have not changed, are they pre set?
If i change them to zero will this then allow the engine to go to the max rpm that is set at 8500

[msdtech1955]

does your rev graph look like this?
7531graph.jpg

[292law]

The graph is the same. (only difference is that the limit is 12400)
I will have more time this weekend to start it. I will let you know if the problem is found.
Thanks for the information,

[292law]

All fixed! It was rotor phasing, Toyota distributor, forgot i had trimed the end of the rotor button as it is about a mile long!

Thanks again for the help guys,

[msdtech1955]

bump

[Gaz64]

..........

[292law]

Still having issues where the engine won't rev past 3000 under load(tacho). The data recorded says it is revving at 13505 and the lowest is 2712??

If the MSD thinks it is revving this high would it be applying a rev limit??

It sounds exactly like a rev limit the engine hits at 3000.

I can't send the graph through as it is on an old laptop that has xp home

Any help is appreciated,

[msdtech1955]

look at the slew rate ....does the graph look like this?

7531 graph.jpg