xb et 13.10 need help to crack 12s

[TheZHLANE]

Originally Posted by prasac

i have tried a few calculators for power to 1/4 mile. this is probably the best online 1/4 claculator i have seen. it's pretty spot on with the Moroso also http://www.rx7.com/accel_calculator.html

This is actually a perfect calculator, only 1mph out on my chart and et was exact

[adz790]

maybe strip some weight off her i.e spare tyre reo bars... helps

[ash68]

make sure your not sitting in the middle of the water when you do your burn out get some one to guide you to the edge of the water .because it builds up under your guards then drips down onto the start line.also work out a routine and stick to it .good luck

ba xr8 ute 11.69 118 manual. stock motor .nos .
1.55 60ft

[Rural 351]

Originally Posted by falconsmurf

set up

xb falcon 3700lbs
351ci approx 217rhp 318lbft@5260
2v heads 4v valves
crow 21649 cam 108/234/244
pedders 90/10 front shocks
pedders soft rear shocks
3800rpm stall
3.89gears
funnel web/850 demon
shift kit
275/15/50s 27high
60ft......1.99
330ft.....5.48
660ft.....8.42
1000ft...10.97
et13.10@102.72
i cant hold stall over 2000rpm on line without breaking was thinking of transbrake though may not suit my combo currently redline over finish line,set tis what is just chasing 2 tenths maybee caltracs?carb is big i know also have 150 n20 shot not ran.all ideas welcom.

You cant avoid it your cams to small, I did a similar motor for a mates XB 4 door had a crow (21823) 249/258 @ 50 109 lc around 620 lift 850 carb active manifold small converter about 3000 rpm ( could only hold just over 2000 on the line) it ran 12.6 107mph, I think you should do a cam change even with your small stall conveter you will pick up a few tenths,

[jcxr]

Originally Posted by falconsmurf

and with gas
3 degrees base
710nm 523ft/lb
236kw 318hp
131kmh 5470rpm
et was at heathcoate 3 weeks ago with no gas

If that 3 degrees is your base or initial timing, there is your problem. Seems very low.

[El Caco]

I'm surprised no one picked this up

Originally Posted by falconsmurf

351ci approx 217rhp 318lbft@5260

(Torque x rpm)/5252 = HP

(318 x 5260)/5252 = 318.48 HP

[red80]

When we were playing with relatively slow cars as teenagers we used to drop the fan belt off before the run and push it up to the line. Do the pass then put it back on on the return road. This was only in Geminis and escorts that ran 15 and 16 sec times but usually dropped a few tenths. Air cleaner off? Back seats out? Tyre pressures? Slicks would help but there are plenty of cars running consistant quicker times on normal street tyres. I used to run reasonably consistant low 12's with 195 street tyres in a turbo rotary escort (don't laugh it was a lot of fun)