Adams87Camaro

Well i just bought this Holley 600 (got a great deal on it, and the Carter took a crap on me) for my firebird, i put it on (un-tuned) and i'm still learning how to tune the beast b/c i've worked with the Carter before and thats simple, but never played with a holley. My friend from out of town helped me set it up a little bit so the primaries and secondaries are jetted right.
Anyways back to the point, well when i punch the throttle from a stop the car gets full power and pulls hard but after about 2 seconds starts to bog it seems like. Also on the freeway it can't handle more then half throttle or it starts to bog out, i know this is probably a stupid question but what do you think needs to be adjusted??

nosibear

Is that a 600 vac. secondary? list #1850? It almost sounds like your main jets are too lean. Or possibly the secondaries coming in too soon.

Adams87Camaro

yeah its vac secondaries, and when i punch it the engine sounds like its realy tryin to fight to put out power kinda like Power-bog-bog-power-bog-bog then if i bring it back to half throttle it gets a bit of punch to it and pulls again in stead of bogging

nosibear

What size jets are you running? It sounds like lean surge to me! But hell, Ive been wrong before!

RB83L69

Yup, it's too lean when the secondaries open.

You might want to try a "trick kit" which is a selection of springs for the vacuum diaphragm that opens them. Start with the black one and see if that helps; if they seem like they never open try the brown one next.

Adams87Camaro

i'm running the stock jets that come with the 600 cfm holley

TA82

If you have the money, I suggest getting yourself a good A/F Meter.... you can buy them fairly cheap... usually $75 dollars.

And if you still have the old exhaust manifolds, or you still have that Oxygen Sensor sitting in the manifold.. which I'm sure by this point has been disconnected... your A/F meter will directly connect up to it.. and you can measure whether or not you are running lean or rich.

It's a tough call to make a guess... it's just like getting the right tool for the job, get an A/F meter and it'll help you find out what's really wrong.

Todd

F-BIRD'88

If you do infact have the stock jetting in the carb,
it won't be lean. Sounds like a fuel delivery problem.
Check the fuel bowl float height. Could be a bad fuel pump or a rubber hose collapsing from heat and vacuum.
Stock jetting should be #64 to 66 primary jets and a #9 or 39 sec metering plate. Check the primary metering block for
junk stick in it. Check the power valve for proper gasket.
And that the power valve channel restrictions are not plugged.
(PVCR).

Could also fix your Carter carb and put it back on.

The only thing that realy goes wrong with carbs is either they get full of gunk or dirt, or some one damages them.
Probabily just needs a rebuild.

Adams87Camaro

actually what happened with the Carter was that i put on one those Edelbrock Pro flo (triangle looking) air filters and it backfired through the carb and sucked down a crap load of filter material into the carb, instead of rebuilding the carb i just used it as an excuse to buy a holley. Now when i first put the carb on i had to adjust the timing b/c it backfired through the carb several times, do you think i may have blown the power valve? But now since i have timed the car and everything, it doesn't backfire out of carb or exhaust.

nosibear

I agree with F-Bird, if you have the stock 66 main jets in it, it wouldnt be lean. I ran 64's in my 355, and it ran great. In your original post you wrote that " a freind helped you set up the carb" , and that you knew the jets were right. Thats why I asked what jets they were. Does the car do this in park or just in gear, if it does it only in gear when you accelerate..then your float levels are probably too low.

Adams87Camaro

the car can rev up high in the rpms just fine, once i accelerate and/or give the car more then half throtle it starts to bog out.