Slow crank

[rick james]

do a voltage drop test hook a volt meter on the + side of battery then the other lead on positive cable at starter set to volts turn engine over if over .5 volts u have a bad connection or bad cable then repeat test at every connection untill u pinpoint bad component

[WheelchairWarrior]

We had the same problem this year when we put in the new engine. Turned out to be our master cut off switch. To check that just bolt the two cables together that go to the master switch. If it cranks good after doing that, replace your Master switch.

[ss86b]

always always always ground your motor to frame................. example we didnt ground the motor to the frame in my buddies camaro. the rules restricted us to stock distrib and module. after 5000rpm his motor popped and missfired. all i did was put an old ground strap we found in the trailor on a head to the frame. problem fixed. we took the ground off after races and made 2 laps popping and acting crazy came back. regrounded it and for the rest of the season no problems. i have never heard of grounding motor in 3 places but really what could it hurt. will have to play with grounds on next dyno run i will report if any differance when you ground all 3 both heads and block vs 1 ground vs letting motor mounts be the ground. i may put an old junker motor on the dyno in the morning just to see. courisity killed the cat thing.

[beer30]

i run a ground cable from the ground post on the battery to the back of the head. no problems ever

[crateracer16]

fixed it...

The master cutoff was bad along with some bad wiring. So after replacing all the wiring and it still cranked slow I by passed the master cutoff and it fired right up. Cranks fast as hell now. thanks for the help fellas.....