Alright here a tech question.

i can't figure out why in the blue hell my car can't reach 5000/5500 rpms anymore at full throttle it seems to be screaming at 4500 and take forever to get there.

before i put in the msd and the rear i used to hit those rpms with ease.

could it be the rear? i still dunno what gears are in there they might be 2:7? i was told 3:23 but im not sure

or i was thinking the carb is out of adjustment or the fuel pump going

heres the rundown of what i got

350 ci 5 speed
msd 6al w/ msd internal coil
accel cap & rotor
comp cams timing chain
holley 670 street avenger w/ 1 inch spacer
edlebrock performer manifold
flowmaster muffler
msd super conductor wires
posi rear

i know it can be a bunch of things but has anyone ever had this happen or here of it?

thanks

 

You using a factory tach? They are known to 'rebel' against you when they get into their teen years

If its not the tach, then I'd say its probably ignition related, for 2 reasons:

A) 99% of carb problems are actually ignition problems.

B) You said you put in the MSD just before this started happening.

If its not one of those, you might have a fuel delivery problem and might not be getting enough. Have you changed your fuel filter lately?

 

the MSD 6AL has a rev limiter,

do i happen to have it set at 4500rpm?

 

got the 6000 pill in there thanks

 

i have a autometer monster tach in there. im gonna try changing the fuel filter and check the float bowls again.

a few guys said it could be the gears are to low. i have to check to see what they are.

thanks