RNation0001

iTrader: (2)

i have a holley efi on both my cars ( 70 chevelle and 67 camaro ) and they run great but does anyone else have the problem that it seems to take to long to start? mine turns over for 3 to 5 seconds before it starts and thats on both cars, i havent done much to the tunes from stock any ideas?

also someone needs to come up with a tuning guide for holley lol

RNation0001

iTrader: (2)

anyone else have these problems

soundengineer

iTrader: (16)

Raise your dwell time..
Change from the generic Lsx 24x setting to custom, the set it to 24x and 1x cam sensor for an ls1

Then try about 5ms to start

soundengineer

iTrader: (16)

And if its not an Lsx engine in those vehicles, just set it to the appropriate crank and cam sensors and up the dwell time a bit...

bmf5150

Soundengineer is the man when it comes to Holley efi!!

soundengineer

iTrader: (16)

no.. I just understand it well and I'm "well versed" (trying to be modest about it) in Tuning...

bmf5150

;-) I have a lot to learn!

RNation0001

iTrader: (2)

yea there both ls engines with 24x sensors, awesome ill try that i reallly appreciate the help ill let ya know how it works out

RNation0001

iTrader: (2)

when you say 1x cam sensor do u mean single pulse

Gray86hatch

iTrader: (83)

how long after it sees RPM on the lap top does it start. Mine 24x is very quick. Dads 58x is a little slow to see RPM and dosn't start as good. Working on his right now it is getting better but just not quite there.

Tim

Gray86hatch

iTrader: (83)

I just changed the dwell from 2.2 to 5. I didn't realize that it sets itself to 2.2 when you do the custom crank cam.

Car starts much quicker. I was able to turn the crank fuel way down. One thing I also found is it starts quicker in batch fire. I have a intermittent cam error on startup. Need to look at this more also.

Overall it looks like the 24x still starts a touch quicker. Seems to get sync just a touch faster

Tim

soundengineer

iTrader: (16)

thats odd.. because a 58x/4x needs less time to sync than a 24x/1x does
sounds like something is not quite right.
I'm sure you will figure it out.

Gray86hatch

iTrader: (83)

I have a 1x cam wheel on it

I know 58 should be better. I am going to be in BG with it in two weeks going to see if they can look at it.

My 24 fires just clicking the key. The sync is just faster for some reason

Tim

soundengineer

iTrader: (16)

the 1x is your issue...
it still takes time to sync a 1x...and because you have a 58x crank...it takes a little bit longer

a 58x/4x is fast, but a 58x/1x is always slow

Gray86hatch

iTrader: (83)

I will pick up a 4x wheel and the change it out this winter

Tim

RNation0001

iTrader: (2)

can anyone post a video of how quickly it starts

Gray86hatch

iTrader: (83)

I will take a video tomorrow

Tim

RNation0001

iTrader: (2)

thanks i appreciate it i dunno what im doin wrong here lol

Gray86hatch

iTrader: (83)

Dad just called the car is running better with just the change in the dwell

Tim

soundengineer

iTrader: (16)

Glad I could help.