Throttle stop ratio question
 

For all you .90 racin experts: 427 SBC in a nova runs 9.3 all out. Gonna do some S/G with an alky carb setup as follows: 54-5500 dead/down stall, shift .80 out, Tstop on @ .30 & off @ 2.5 to run close to 9.90 in 2-3000 ft DA. What kind of T/S timer ratio am I gonna end up with? was thinking around 5-6 to 1 with what testing I have done so far. Also any ideas on a good starting point for an air ratio? 60 ft repeats pretty good (about .010 swing all day) Thanks for any replies

Re: Throttle stop ratio question
 

just curious...... why do you want to run the stop rpm so high?

Re: Throttle stop ratio question
 

Well Wayne, a couple of reasons, first, I'm just a little over a half of a second under so I dont have much to begin with and second, I want to shift into Hi right away for consistency which kills about .25 so now I'm barely .25 under and I really dont want to come off the stop in Lo for obvious reasons. I also dont want to run less than 1 second total timer cause that doesnt work well at all so thats what it takes me to run 9.9 with about 2.2 timer., 54-5500 rpm.

Re: Throttle stop ratio question
 

there is a good explanation on biondo racing products web site....tips on throttle stop racing in the faq section...hope this helps

Re: Throttle stop ratio question
 

Thanks Wayne for that info, that helps alot. confirms what I was thinking anyway and heads me in the right direction. 5 to 1 with 4800:eek: That must put me @ 7 to 1, 8 to 1??