The air gap isn't known for its stellar bottom end torque, however, your truck should still have better acceleration that what you describe..... I would expect that once you get to around 2500 RPM or so, the truck should basically stand on end..... The fact that it bogs down at low RPM.... that's gotta be a mixture issue. With timing as a contributor as well....

If you still have O2 bungs in your exhaust, I would be REAL tempted to install a wideband, and see what is goin' on there.

 

So when I did the cam in my v10, it neutered the bottom end, until I discovered it needed to be advanced a tooth to achieve the correct centerline. Did you verify cam timing with degree wheel? Mine was a regrind and could not be installed "dot to dot" as I had assumed.

 

If your bottom end is gone, consider the potato launcher mod as I call it... 1 or 2 1.5" tubes with caps on the end tapped into the vacuum lines. this mod brought a ton of low end torque back into play. With 2 of them, 1-15" & 1-12", I found I needed to open up the air box more & removed the intake snorkel + the exhaust dump valve I had on the box (was a small obstruction compared to not installed). After doing this I dialed in the tune again to get LTFT numbers to 0 +/- 5. runs really strong in the rpm ranges I drive... 1500-4000 rpms.

 

i had the cam card that put it at 4deg adv. I have everything to deg rhe cam but didn't get to for reasons at the time I was supposed to get a set of roller rockers with all the parts I bought from P.I.E. when i bought the heads and he sent me alum chevy rockers after specifically stating that I wanted steel adjust ones so he tells me he doesn't know of any steel ones and it would cost me shipping and restock to send back ! Not to mention the comp studs and guides I bought that I can't use so I had to run the oem rockers and spent all the time to space them so I never got to dial the cam I was so run short from his transaction I'm on disability lost my leg in an acc or I would have drove to him to straighten that out but anyway I didn't get to check it so I'm just going by the cam card sorry for the rant THANKS for the help do you think that might be the prob?

 

I have a bud that has a sniffer I did the poor boy thing I have a ramp set up and it won't burn your eyes while it's running with this carb but it did with the 800 cfm on it but with this carb I have to feather the pedal in the morn and after warms up it doesn't burn the eyes but I'll go check it and see. Thanks for all the help I'l fill u in on the results of the test may be a day or so

 

Erm, pardon me for asking this... but... If you are short a leg, how do you drive a manual trans?

 

I have several old three wheelers and motorcycles I've had for yrs for parts and I took the thumb controls off and tie into the floor pedals and mount them on my shifter and thats my throttle but I can still drive without it as long as I am not takin off uphill with a tailgaiter at the stop sign lol

 

I have a 89 d250 np435 granny (gets 20 mpg 5.2) my wifes 97 jeep my honda ruckus and my 85 yam vmax that has a electric shifter ! If you do fb you can see the video of me ridin them ! You should see the looks I get at red lights lol

 

you are the only one on the forums that has ever snapped to that you're sharp 🦿👍😁

 

I'm goin to home depot today get some sched 80 pvc and thread me some hose nipples on them and try this mod out !! I never considered that before and definitely never seen it . Now I know what that little gadget was for on my 440 motorhome , they call it a vacuum amplifier, little thing looks like a can of skoal with a hose nipple comin out of it . I'll let in on the results thanks for this help.