ive been racing my car at the track and my sixty foot times have been down about two tenths or more and i noticed my fuel pressure was set at 3 pounds do you think that could hurt my 60 foot times thanks.

3psi is low 5psi is good. You could be starving for fuel but you would notice it all through the run not just in the 60' times.

no idea on what has changed? I would think starvation would show up further on down the line in 3rd gear but I ain't a drag racer per se. Is this 3psi at idle or during the run? Plus gauges are notoriously inaccurate

Fix the broken parts first and go from thier Let us know what you do and find, I had a fuel supply problem on my old pump gas duster, I bought a LM1 Wideban with the RPM conversion, it showed my motor going lean on the kit at the starting line and it got progresively leaner during the entire run I fixed that problem and the dang car got faster

it could be hurting it all the way down the track this is a 422 inch w5 headed small block in a duster that weighs 3200 lbs so it should run in the mid to high six's and its running in the low sevens at 97 mile an hour with a 160 60 foot with the other engine it went a 128 60 foot and it was a 355 inch w5 headed engine the only thing i can think of is the low fuel pressure and no jet extensions in the dominator letting the fuel get away from the jets three pounds of fuel pressure just aint enough fuel for a dominator i don't think it could be starving it all the way down the track what do you think.

Do you have a fuel cell? Is the pump / filter in the trunk? I haven't had it happen to me, but have read about others having issues with the foam breaking down and clogging/restricting the filter causing issues.

I think i might have figured out why the car wont 60 foot very well, I pulled the engine and pulled a head to see where the piston was at and it was down about 2 to 3 thousand in the hole so i no that aint my problem now i looked at the head and it looks like nothing has been done to them hardly at all and my camshaft is a 684 lift roller and i think it has too much cam for them heads once it gets moving it makes pretty good power. i looked at shady dell speed shop and it says w5 heads out of the box don't flow but about 268 i believe do you think this could be hurting my 60 foot issues please help.

Your new motor may need more converter than your 355. did you run the dominator on the 355? It may need changes, although your mph also seems low for that combo.

Mike

You need jet extensions. Head flow dictates max HP, so I would port the heads and match the intake. The cam is probably fine, as an unported head can use the same duration. Set the fuel pressure up to 5 psi or more and if every thing else is good it ought to fly

DO a fuel system flow check... make sure its flowing
good... the heads were on your smaller engine and it
ran a better 60'... the bigger engine is wanting more
head flow... put the extensions on the carb.. make sure
you have enough room above the carb for air flow... which
intake are you running..the M1 for the W-5s with a adapter
EDIT
Raise the pressure up... max of 7.5 psi with a known good
gauge... usually above that and it will push the needle off
the seat and flood it... you could be running out of fuel on
the whole run(it has just enough to run but on a VERY low bowl)
also.. dont use a oil filled gauge... the oil heats up and gives
a bogus reading... if yours is filled just drain it and put a
hoe in the fill plug so it vents

Do you run a filter before the pump and if so what size? As suggested, I`d flow the system and install jet extensions but NOT the screw in type but the type the jet slips in and you need maybe 5 1/2-6 psi at most w/a .130 needle and seat.......

Thumper-Dom, why not the screw-in jet extensions? I always thought they were better because of less chance of falling off. Thanks!

In some cases they`re a restriction for one and some have stated it`s better to have the jet in the metering block where it belongs and have the fuel volume/weight forcing fuel into the jet as opposed to being at the end. Mark on here can probably explain it better and I`ve see some of the high-end carbs now using the sleeves instead of the screw ins.........

FWIW, I recently installed a fresh engine, same everything - heads, cam, timing, pistons, etc. as the one it replaced and just swapped the carb over. First pass I thought it was a dog as I lost .03-.04 in 60'. I jetted down 2 #'s and got most of it back with ET's as good as ever. Obviously, despite having the same set-up, the new engine needed less jet and still needs the accellerator pump circuit optimized. So if you went to a completely different engine combo, the carb likely needs recalibrating. The low fuel pressure and big cam is likely aggravating the situation.

My 60's have been as quick as 1.46 and runs as fast as 11.14 @ 117 weighing 3,540 with unported heads and a .474" cam in a 360.

I am second guessing my remark that the cam should be OK. A big motor with the same size valves will probably like a fairly narrow lsa. But the car ought to 60ft better just due to the cubes alone. So after you get the car running reasonably well it might be worth looking into what cam grind would be best for your new motor combo.