anyway - went back to the track last night, needless to say i was somewhat pleased. i have changed nothing since the last time except the drag radials were on again, i rejetted from 60's to 64's in the front and i used an open spacer instead of a 4 hole one and bumped the timing slightly.

ran a best of 14.105 @ 97 - i gained almost 5mph from last time - but my 60' times were suffering with 2.1's and 2.2's on the radials. the first run i clipped a 2.0 when i was power braking it but the car loaded up and bogged a little - 2nd and 3rd run i left just from idle and punched it to the floor. anyway

the car feels great at the upper end screaming up to 6k now with ease but off the line, even on the street i get a slight bog like.. a hiccup, or a hesitation . you floor it, the car kinda wants to go forward but is like not really moving then BAM it takes off. should i try different pump cams again? or what? right now i got a red in #1 slot so.. and holley doesn't really tell you what cc's each is or anything so i have no idea. :|

 

What squirter? Try going to like the pink cam, that's the smallest. If it improves then you have too much shot, if it improves with a bigger cam like the orange or blue then it's not enough. Sounds like it migt be too much shot though, if it is then try a smaller squirter size, and re-cam it. Sometimes it takes a while to get the throttle response bugs worked out of a carb, but once you do it's worth it.

 

whichever the stock squirter is, i believe it's #31. i thought pink was larger? and blue was a smaller but more progressive shot?

 

No. I've found so many conflicting things on what cc each squirter discharges etc. Holley has a chart on their site that gives you some idea. Basically pink is the least fuel, blue is the most(without going to the 50cc pump cams). The pink and black cams are close in fuel delivery, but with different curves, then the white and red cams, then orange and then blue. The green cam is also a modest shot, but is very rapid, like the blue cam. Basically you have to experiment to get it right. Also if you change jets, make sure you pull the float bowl all the way UP when you tighten it back on, otherwise the pump arm sits farther from the spring on the cam arm and you may get a weak shot. You can also use the spring and adjusting nut to fine tune the shot. Tighten it and the shot is harder, loosten it and the shot gets softer.

 

tried the blue cam in the #1 slot - if u floored it, car would die, but if you progressively rolled into it, it took off like a scalded dog. - put the pink one in @ #1, it wouldnt move it just blubbered around - put the blue back in and put it on #2 and it seems fine but i still dont have that crispness. like when u mash the pedal to the floor it's like a hiccup still, it's better with the blue in #2 but though the range i don't think it's as good as the red one was in #2.

 

Try going back to the best cam setting you had, like the red, and going to a smaller squirter, like the next size down. If that gets worse then go up a size. Also, on the pink cam, it may have 3 holes. You have to experiment on the position and adjust that spring/bolt on the cam arm to make sure you don't have any slop in the linkage going to the accelerator pump. If there's slop then when you first depress the throttle there won't be any shot. I'm running the pink cam on I think the middle hole? I've found on the #1 hole(I think that's it) it hiccups at part throttle just off idle.

 

Here is the offical info from Holley on Cam sizing. I cannot validate this and it does not take into account the aggressiveness of the cam.

Cam #1(cc) #2 (cc)
White 17 19.5
Blue 1820
Red 18.5 20
Orange19 24.5
Black 19 18
Green 24 30
Pink30 37.5
Brown 36

Holley has a chart that shows the flow verses throttle position but it is in black and white and impossible to read.

 

Try also to figure out WHEN it hiccups in your throttle movement. Putting in a smaller squirter can help when it's lean. You will still get the same CC of fuel because the cam determines that. But the squirters can help with timing also. Rich down low, lean at the top....smaller squirter would slow it down to were the top lean spot might get covered up.

 

well its right off the line - you mash the gas to the floor, nothing happens then BAM it takes off which i think is seriously killing 60' times which is obnoxious but it's also annoying in daily driving. you can ease into it fine, but if you smash it to the floor for a good launch it just sits there for a sec and then takes off. - theres no play in the accelerator pump either, as soon as you touch the throttle its moving the lever so.. i dunno

urban_cowboy - yeah i know i tried looking at their site and was like great, thanks holley use black and white so i never knew what the hell any of em did.

 

http://holley.com/types/Accelerator%...ce%20Parts.asp

That's the chart, color coded.

And yeah, a smaller squirter makes any given portion of the shot leaner, but extends it over a longer period of time, a larger squirter provides more fuel at any point in the shot, and the shot lasts for a shorter time period, but it doesn't change how much fuel is delivered(that's determined by the cam). And often you'll find that changing the squirter may require changing to a different cam profile.