Drag Racing Discussions > Front Engine Dragsters
7.0 and nitro
wideopen231:
Read spuds noted. Heck I could rewqrite the notes by memory.LOL
AF150:
Wideopen 231...
You will love it if you ever get out there. Index racing is perfect for injected nitro. We changed our Jr/fuel combo over to run NE1 back in the late '90s. went from 15:1 to 10.5:1 with flat top pistons, re-calibrated the fuel system with 7 gal pump & 30A nozzles, changed to aluminum rods and put a 3.70 gear in the car.
Back then the index was 7.50 and we found we could dial into the index by changing the percentage a little depending on conditions. In the good air at Bakersfield, 30 to 35% usually did the job. This is with a pretty light 1450# car with driver and 406 cu. in. sb Chevy. It left hard and would run 185 or so on the big end.
Good simple combination. We won the March Meet in 1999 and a bunch more stuff in the next few years.
I would recommend this type of combo as it is low maintenance with good results. Don't over think it and
take good care of your fuel system between races. Just my 2 cents.
Mike
wideopen231:
AF150
Question on why lower compression with the nitro? We run 15:1 in the A/Fuel car I work with. Yes it is Hemi and stronger bottomend and bigger combustion chamber. We also run 40 gpm and dual 44 amp mags. While I don't have 44 amp mags or a 40 gpm pump I also do not plan to run 95%, I do have 2 msd mag 12's and two 20 gpm pumps and already have 3.90 gear with 1.68 low and?or hi/low trans valvebody and could leave in low to lad engine, the converter would be 600* probably(lol). More of joking with slight chANCE ON THAT LAST COMBO OF PARTS.
was lower compression for less abuse to bottom end,bigger tunning window or just with sbc they are not crazy about bunch of compression and bigger loads? Just wondering.
ANy idea on combo of Nostalgia A/Fuel cars.Gears compression and know need clutch and can. Bad part I sold both in past and that is why I hate to sell stuff.
wideopen231:
Finally found a topic to get some activity on site. Nothing like nitro to get things going fast.LMAO
AF150:
Running A/F is a big step from 7.0 pro. More than a second if you want to outrun Bates and those guys.
Just make enough power to win rounds and not break stuff. If you are good at the tree, that approach will win some index races for you.
If you want to run a heads-up class and set records...well you better get your wallet out because we are talking apples and watermelons here.
I think we used our budget wisely, had some success, and had a xxxx of a lot of fun.
Good luck whatever you decide to do.
Mike
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