- Joined
- Jun 9, 2012
- Messages
- 1,323
- Reaction score
- 8
- Location
- oklahoma
- My Car
- 1973 mustang sportsroof - 351c 2v - fmx trans.
That's a win in anyones book, glad to hear it is running nice::thumb::
I still need to finish, now what do I do about distributor advance? Should I hook it back up?most carbs come with a 6.5 and that is the most common power valve used.So is a 6.5 power valve usually what comes in 4150 style Holley's? I'm not sure what they come with.
It's running so good I was planning on driving it like this for awhile. I haven't taken it on the freeway yet.
holleys power valve suggestion guide used to be pretty much useless because in fact, they used to tell you three completely different ways to determine what the best power valve was and they all contradicted themselves to some degree . i found this out around 10 years ago when someone else mentioned it to me because i had never read any of their info . i have been building and tuning cars since 1970 but learned some on my own and some from others, so i never needed to read it.
i just looked online and saw the link below which is different than what i had seen before and it is far more correct, however, it is only a guide and if you still have probs using their method, you should try something else because tuning is a bit of an art and what works for one app, doesn't always work quite the same for another.
http://forums.holley.com/entry.php?430-Holley-Power-Valve-Tuning
you spent maybe $10.00 for two jets and maybe a total of one hour tuning your engine based on suggestions on your thread and it now roasts the tires from a dead stop and will spin them when it hits second gear and it has absolutely zero hesitation . in my experience, once a car does this and still idles decent etc, there is little, to nothing else that will make it any better, however, it never hurts to try.
There are a couple different options . Below is what I would do and hopefully it makes sense.I still need to finish, now what do I do about distributor advance? Should I hook it back up?
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