camaroracer1992

heres my combo and heres what it ran whats wrong with it?
355 750 dp carb single plane victor jr intake world sportsman2 heads hooker super comp exhaust 216/228 cam @.050 (454/480 lift) 2600 stall 3.73 rear 700 r4
it only ran a 14.5 @95 mph shouldnt i have way more mph?

heres how the carb was set up
dual 50cc pumps with .015 clearance and yellow cams
65/72 jets
16 degrees base/mech timing at 1000 rpms.

thansk in advance any help is appreciated.
joe

five7kid

iTrader: (14)

What's your total timing? That is the advance you get at high RPMs with the vacuum advance disconnected.

Seems like it should have more power. You're barely under my corrected times with just a 305 and 2.93 gears. Your cam specs look like my Crane. Did you do anything to the heads, or just bolt them on? Where did you shift?

darbleinad

perhaps the carb and intake are abit over kill for that motor with the cam that is currently in it. how is the low end power and throttle response?

camaroracer1992

the car is running 38 total and it has a 4.5 hg power valve i was shifting at abotu 5700 rpms.
joe

Jester

whats your A/F ratio look like?

RB83L69

That's a major giant mismatch. No amount of fiddling with the timing, or even the EGR, is ever going to make it right.

You have a race car intake and a grocery cart cam. They are working against each other. At any RPM where the cam would be effective, the intake is killing it; but by the time you get the RPMs up to where the intake is in its zone, you're long past the cam's power band.

Either put a cam in it with at least 20° more .050" duration, or get a dual-plane intake. ABout the biggest intake you should even think about considering with that cam is a RPM. Which thing you should do depends on what's more important to you: speed, or streetable economy.

camaroracer1992

i was told that the intake would help me on the upper rpm range even though the cam wasnt advertised out that far. i want speed its mainly a drag car ii do take it to cruise shows and stuff though so i still want streetability ya know?
joe

darbleinad

like RB83L69, said you are gonna either need a bigger cam or a dualplane intake to make that car run right and produce the power it should. i would go with a bigger cam. looks like you have the rest of the parts needed to support a much bigger cam.