With my rcsb (mods in sig), I plan on spraying a 100 shot and eventually bumping it up to a 125 or 150 hit. I run 30" tires everyday and my slicks are 30x9x15's. In a few weeks I'm ordering a posi from Ron's Machine Service and I'm trying to weigh options on gears. I've got 3.73's stock in the truck and it does OK but I figured I'd put some fresh gears in it while I was having the rear freshened up anyway. I won't be spraying very often but when I do I will be running the 1/4 and I had some concerns about spray and 4.30s causing me to run out of gear. I don't think I'll trap much over 120 if I spray it with the current 3.73's but IDK. I haven't taken it to the track yet because by G80 is already peg-leggin'. I searched and found guys asking the same question but they were running 4L80e's or giant mud tires so I couldn't get what I'm looking for. Thanks for any help you guys can provide.

-Josh

 

Oh yeah, sorry if this should have been in the drivetrain forum. I thought it pertinent to both, but more to this one.

 

I don't see it being a problem. I've seen guys spraying on 4.56s without issue. I'm sure the shift points will need adjusted to get the most out of it.

 

That's what I'm hoping. I may spray it once a month, or I may spray it once every two months but I know I won't be paying $50/bottle every other week like a few of my friends. I'd like to get the most out of my truck all the time and I think 4.30's will pick up quite a bit from the 3.73s and maybe even offset some of the power loss from the timing we take out for the juice. Thanks for the opinion buddy.

 

I dont see problem either i seen people running a 4.88 on 28" tire with a 4l80e that just enough gear to make it to the end.

 

I had 4.56s in my truck with 200+ of nitrous. Went 120+ in the 1/4. Been over 140 on a closed course in mexico lol

dirt_track_racer_81 has 4.56s, been 128mph in the 1/4 and going to go 130+ this year.

4.30s won't be a problem

 

I've run 4.30 up to 140 on a 28" tire. you shouldnt have a problem.

 

That's why I'm on PT.net and not on tech hardly any now. You guys rock! I'm looking forward to the difference. I think it was La Glock that I asked how he liked the 4.30's for a DD and he said they were great. We'll see, I guess. lol

 

4.56 are even greater! Lol

 

It all depends on how high you wanna spin the engine and how loose the converter is up top. being the yank it should be nice!