[donny dotson]

I just got my 1974-75 Olds mo-bubble Q Jet from Chicago Carburetor probably out of a Toronado, Hurst W6 or whatever and it's easy to varify that it is a 800 or a 750 because a Qjet only came in two sizes, if anyone says different they are full of Ka-Ka. I test fitted to my air cleaner base and clears like the original. It supposed to be Pontiac linkage on it. The throttle arm pivot is in the right spot but, mounted to the inside ( can easily be swamped ). They say it was bench tested and flows 830+ CFM. SMI and Jet power said they would build me a carb for 750 bucks + 200 if I wanted everything plated to look nice and it would take 16 weeks. Chicago Carburetor charged me 600 and I got it in 1 week and looks brand new. We will see how it performs. I had to monkey with my crank timing gear, it was to tight along with my balancer. The stroker crank is a couple thousandths bigger than stock ( the balancer plopped right on a stock Pontiac crank ) and Of course the windage tray requires spacers and the stock water pump divider won't fit my Kaufman timing cover. I will know next time.

 

[tjs]

Did Chicago ask for all your build?CI,CR,duration at 50 on the cam along with LC and lift?What the heads flo at lift?Also what kind of cam,HFT,SFT or hyd roller or solid roller?Shorty headers,long tube etc.Just curious how they build you a car without ALL that stuff?
FYI,Sean at SMI drives a Pontiac!Tom

 

[donny dotson]

Yes , those guys are on the ball, I sent them a copy of my cam card, what intake, compression etc, this stuff is not rocket surgery. I would have had SMI or Jet power but, Sean answerd the phone while JP would not take a call and take 3-4 days to get back to me by e-mail, POOR customer service and both said 16 weeks plus.

 

[Aus78Formula]

Is that carb there meant to be the 74-75 Olds carb? It shows a '77 403 (350) Olds 800 cfm carb. One of the better carbs to tune and flow for performance yet can still be found on a smog engine too.

 

[donny dotson]

You are correct and one more thing, this carb has a ported vacuum for setting the distributor advance like it should, why the original doesn't have one is dumb. They say it will be plug and play, my dyno guy has everything for tuning the Qjet when we run it.

 

[tjs]

Sean pretty much answers if he is not out doing a test drive.You can make a appointment with him to trouble shoot a carb.I just dropped off a AFB to him a couple days ago.As said,if you have a carb he did and a issue he will put it on his car and drive it.He worked for Jet for years and left on his own.They are maybe a 1/4 mile from each other.Tom

 

[donny dotson]

If I have known what I have learned in the last week or so I could have saved 500 bucks , not just 250-300. If the carb needs a little tweaking I will handle it. I have learned a Qjet is not that complex. After I'm done I will have a recipe to save the next guy money. I'm sure Sean knows his way around a carb but, 300 dollars more and 16 weeks, I not that flush with cash/ time and need to spend it on other components. I do my own metal,fab,body and driven train work myself. If I farmed out stuff that I could do, I would have a more money in a car than it was worth. I have always chunked Qjets in the trash but, didn't want to mess with going down the road modding the crap out of the shaker. Early 2nd gen T/A peeps are few and far between, to bad we couldn't sit around in each others shop,drink and BS about Pontiacs. All my friends are Mopar nerds constantly rip on my T/A and call it the Trash Can, can't wait till the engine is back in so I can hopefully kick the crap out of there 440's.

 

[donny dotson]

Just got my heads and measured for push rods. I'm running Morel hydro roller lifters, 1.65 PRW rockers and Kaufman heads. My push rods measured 8.748, Anyone use this combo?