What are people using for jets in there 850 mine came with 80 and 86 on a 455 with edelbrock heads?

 

Cam? Compression? Intake? Wondering if you could be a little more vague

 

Lunati cam,w30 intake,210 compression,elderbrock heads stock.Mark I private messaged you more details about this motor and never got a reply.i was just trying to get what others were using as a starting point.

 

Never got the pm, sorry.
210? I'm guessing that's cranking compression? For the last time what are the cam specs? I'm trying to help, you're not helping me too much.

 

Sorry my waste oil furnace took a brain fart had me busy all day yes it is a lunati 10420703lk.It was cranking compression.Tremec 5 speed,355 in the rear.trying to find a good place to start 80 and 86 were rich at idle.Let me know if you need more info.

 

Main jets have nothing to do with the idle.
If you can't get the idle lean enough then you'll need to change the idle air bleeds. Go up 4 numbers at a time. When it's correct your idle screws should be about 1-1 1/4 turns out.
Do one jet/air bleed change at a time. Get the idle fixed then go to cruise and wot from there.
And fwiw, not the cam I would've used by the way.

Thanks.

 

What is why you wouldnt have used this cam?Can you please elaborate because i am thinking it sucks but would like your opinion and why please.

 

Headers or ex manifolds?

 

Full length headers

 

Then I would've done a 236/240@.050 on a 110. Lift would've been .568 on both. Although you have a crappy intake you have good heads, use em.

 

So i should go back to the original 80 and 86 jets and change the air bleeds is this correct?Is there a better intake that will still alow the original breather?

 

Leave the main jets alone until you clean up the idle.
A Performer would be huge upgrade. But your cam is still too small based on your cranking psi. 210 is a bit high, even with aluminum heads.

 

How can you have a discussion on jetting without knowing elevation? What works at sea level wont work at elevation.


Where are you & what is a typical corrected elevation where you live?

 

60m above