dirt track racer 81

iTrader: (45)

quit bein a tight *** and put 91 in it..if you cant afford 91 then you shouldnt be racing it or modding it

chevytruckguy

Well, I guess I'm going to splurge and run 91. So, with a HSW wet plate 100 shot, will the stock pump be ok? Anyone run a fuel pressure gauge with this same setup? Thanks.

slowprocess

iTrader: (9)

Somewhere in the 28 degree range, give or take alittle.

slowprocess

iTrader: (9)

Stock pump should be fine for the 100 shot.

nxpress03

I agree with dirt tracker) I would go ahead and spend $100 and get a walbro just to be safe.I run two walbros in mine.

chevytruckguy

Thanks for the advice. So, if/when I get greedy and throw the 125 or 150 jets in, I'll need the updated pump? Does anyone know if the computer will change the timing, for example under full throttle and high load, from the timing setting at lets say 4500 rpm, and no load? Thanks.