I called holley tech department and they couldn't give me any recommendations on jet.combinations.
This system was on a different car that had an extra fuel cell up front that I could richen the fuel charge when spraying. That particular combo used gasoline. My new car has a methanol tank up front and a magna fuel 500 pump. I would think that someone else besides me has a nos plate and enriches with methanol. The nitrous is only used occasionally at the finish line. Anyone have a similar combo and or any advise? Thanks

This might give you some help:

https://www.nitrousexpress.com...ventionaljetting.pdf

You'll have to understand the Cheater plate jetting and then do a comparison to the nitrous express but it should put you in the ballpark. Stay on the rich side until you're happy with what the plugs and ET is telling you.

Rich is definitely not your friend.

Alcohol injection or carb?

Yea well since it's not a direct comparison to what he's working with, staying a bit rich might save him some headaches and parts damage as he works through it.

You have to understand that the SYSTEM you have, meaning the solenoids and plate along with the jets make up total flow of each HP level and not just the jets! If it were me I'd flow the fuel side on gas into a small container for a given amount of time, say 5 seconds then measure the volume then move to alky and adjust until you get close to twice as much fuel volume, both larger jetting and fuel pressure may be required. Note on smaller plates kits the solenoid may end up being the restriction once you get over a certain size jet! so more pressure could be required. Once you have that fuel jet/pressure deal I'd back off some, maybe 1/2 PSI of fuel pressure and try that, if it fubbles when the NOS hits, shut it off and lean it some more. Too rich is way worse than to lean!!! Also stay conservative with the timing until you get the jetting/pressure tune in. If you run it too long and it's too rich, fuel can get trapped between the top ring and the second and if it ignites you will loose a piston ring land for sure. Too lean won't hurt anything.

82 square, 9 psi of fuel pressure, pull 8 degrees. Shouldnt have any issues with that, and it should move the car just fine.

Talk to Bozman, he helped develop the methanol enriched nitrous kits. He'll steer you in the right direction

Id use a 50% load of nitro for the spray. What can it hurt ? That should make some good flames of the collectors !

I sent you a PM, remember that the orifice in each plate is different and takes a particular amount of pressure to feed through the plate. Also, the soloniods are going to be different to be compatible with the alcohol. Jetting is different for each plate even if it is alky and there is not a parallel match for alky to gas on percentage.
Also, it depends on how much you are wanting to spray, NEVER take 8 degrees of timing out for Alky unless you are spraying well over 350hp, it is a different burn rate and the chamber will be much cooler given the amount of "cold fuel" in the chamber. If you are finish line driving a 150hp shot will most likely be enough (in a dragster I can see .2 and 3.5mph in the cones). Only pull 2 degrees for that. it all depends on combination and what you are wanting to do with it. If you are wanting to spray the entire way then it is a different approach.
Belt drive vs electric also changes the jetting. Remember that the jet maps anyone gets in their kits are WAY safe, with alky on a electric pump you are probably in the 7lb range, that is a lot differnt than 5 because it isn't linear as you go up in pressure to jetting as jetting is also not linear for jet dimension.
I have responded to your PM, apologies that it is a little late.