tbird187 said:
Trying to figure out why my combo feels so slow.... somtimes it feels like it pulls harder than others.
95 5.0
f303 camshaft
ported header to 1250 gasket
ported explorerintake
stock headers.... have bbk's
x pipe
mac catback
4.10's
t5
stock fuel
stock maf
8th mile ran 9.0 with a 77mph???? 2.0 60ft
any tips
Well first I think your cam is just a litte too large for the other mods you have. I am not a big fan of large cams at all and the f-cam is rather big. Second when you get into modifying changing one thing usually leads to ten. You need a adj fuel pressure regulator and a good liquid filled gauge to keep tabs on your pressure and adj it accordingly. I would also get those headers on the motor. With the top end mods you need to get the air out too and the factory headers suck and are definately the bottle neck in your exhaust. And finally the best thing you can do is traction. 98% of my drag strip time is on a 1/8th mile and I have been racing for about 5 years now. Just for comparison here are some of my 1/8th times at various stages of mods to my car.
Stock motor, underdrive's, off road pipe, flowmasters, M/T sportsman pro tires, stock 2.73 gear: 9.03@76 with a 1.93 60ft.
Same mods as above with 3.27 gears:
[email protected] with a 1.92 60ft.
Stock bottom end with holley systemax alum heads, e-303 cam, edelbrock performer rpm intake, 3.73 gears, underdrives, off road x-pipe, dynomax ultra flo welded mufflers, 24# injectors, pressure regulator, 190lph fuel pump, etc and lots of track time my best was 8.03@85-86mph
Then I went all out and built a long rod 306 based off the sportsman block with all forged goodies, 9.5 compression, main girdle, used the same heads but had them ported and the intake to match, with a cam that is roughly the same size as the f-cam with just a few differences that were specific for this motor and e/t drags.
[email protected] with a 1.59 60ft.
Not trying to knock your recent cam change I just think it has too much duration for a car without a higher flowing head. To get a good 1/8th time it's all about torque with out cars. They are heavy and take some low end torque to get them moving. Plus you need to look into some other supporting pieces like the fuel side of things and poss a good tune.
