Jet Q-Jet Stage 2 - any experience?
Thread Starter
Drifting
Joined: Feb 2005
Posts: 1,879
Likes: 38
From: Los Gatos CA
Jet Q-Jet Stage 2 - any experience?
I picked up a very slightly used Jet Q-Jet Stage 2 from a local guy ($250). Does anyone have experience with these carbs? I've heard good things about Jet's work, but we all know about rebuilt carbs... I appreciate your thoughts.
Melting Slicks
Joined: Apr 2000
Posts: 2,145
Likes: 1
From: Ft. Walton Beach, Fl USA
Now it's sitting on the shelf on top of the Performer RPM Q-Jet intake in my garage.
Thread Starter
Drifting
Joined: Feb 2005
Posts: 1,879
Likes: 38
From: Los Gatos CA
Thanks to those who posted. Car is a very original, 1 owner 65 442. Originally 4-Jet; Oldsey 442 Q-Jets started in 1966. I had a Edel 1903, which is a little lean on the primary side. I just slapped on the Jet Stage 2, and did not change a thing except set idle. Runs stronger off-idle. I have the basic tuning to do; I haven't adjusted the mixture screws. It idles down during light cruise better. I guess Jet reworks the idle circuit. This is a better carb. I might get one for my Vette (of course, Henry is right up the street in San Mateo)... Again, thanks for posting.
Race Director
Joined: Apr 1999
Posts: 11,520
Likes: 13
From: CORVETTE 77 385 C.I. TEXAS
You might find this interesting which includes a Jet Q-J.
CARBS Tests TQ/HP
http://www.corvettefaq.com/c3/carbcomparo.htm
CARBS Tests TQ/HP
http://www.corvettefaq.com/c3/carbcomparo.htm
Drifting
Joined: Mar 2011
Posts: 1,886
Likes: 9
Just had the boys at Jet do a stage 2 rebuild on my Qjet. I've only had it back together for a few days. So it's a bit early to tell.
My car is a 74 small block with a 4 speed.
Apparently they richen up the idle and off idle circuits a bunch. I found that the factory setting for the choke pull off (on a cold start) was now way too rich. I had to adjust the choke linkage to open up quite a bit more than stock, otherwise it would cough, smoke, and stink of raw gas. I also leaned out the choke's bimetal spring linkage a scooch. I may have to play with it some more.
I haven't had a chance to get it through inspection or calculate the fuel consumption.
My car is a 74 small block with a 4 speed.
Apparently they richen up the idle and off idle circuits a bunch. I found that the factory setting for the choke pull off (on a cold start) was now way too rich. I had to adjust the choke linkage to open up quite a bit more than stock, otherwise it would cough, smoke, and stink of raw gas. I also leaned out the choke's bimetal spring linkage a scooch. I may have to play with it some more.
I haven't had a chance to get it through inspection or calculate the fuel consumption.
Le Mans Master
Joined: Sep 2004
Posts: 5,116
Likes: 5
From: Livonia MI
I'd say for $250, you got yourself a pretty good deal there. Have a Jet products catalog around somewhere, but cant find it right now. As I recall, the stage 2 has some of the fuel passages opened up a bit. I'm running a custom set up Q-Jet on one of my car's, and can't think of any other carb I'd rather run. Tuner Lars Grimsrud was giving a performance tune seminar here a few years back for $150 bucks, actually helping physically set up your car. My buddy's 79' L-82 Q-Jet was having problems, and offered to take it over, as he wasn't around. Didn't happen, and later had the dealer do it for $500 bucks.
