VERY LONG...
As the title says, this is a review of the process in deciding which carb to get, acquiring it, installing it, and the results to date. If you want any more details, PM me and I will do my best to respond. I am a hack, and this is just my experience, so if you have had a different experience, I cannot speak intelligently about that, but feel free to add to this as if it helps someone...great.
Backgroud:
I have a 1973 Blazer with a 383 roller, headers, and a mild Comp cam that was running an old Carter with sprung needles and a few other customizations. My truck stalled a lot, so much so that everybody who rode with me got used to rolling down hills backwards with the engine off (not always fun).
Selection:
I read a lot on this site about the Truck Avenger, Qjet, and Demon Trucker and originally decided it was between the Holley and Demon, and I did no t even consider the Qjet, mostly because growing up I had always heard "Quadrajunk" and was hesitant to go near it. Here is the link to some questions I had
http://coloradok5.com/forums/showthread.php?p=1487047#post1487047
Finally, I talked to Sean Murphy at SMI and he basically told me that the Qjet has the best design for offroading because of where the fuel bowls are. Instead of fuel sloshing over and dumping down the intake like with a Holley, the fuel bowl was located in the middle of the of the throttle body. Now keep in mind, I don’t know d*ck about carbs so I did some more research on this site and a lot of guys were really hyping up the Qjet. Based on Sean’s input and the stuff I found on the site, the Qjet won (especially because the Demon was very expensive, and the Holley was going to require tuning whereas in theory, the Qjet should be a bolt on piece).
Purchase:
Here’s the deal, SMI has a web page that asks you everything from the lobe of your cam to the year make and model of your car. With all that info (and your credit card number), they build you a carb that’s right for your rig…or at least that is what I understood. Sean told me the build time was three week’s, but after I told him about our trip to “Miller Blazer Trail” on the 18th he was able to get me the carb in time.
Installation:
Since I run an Edlebrock intake, there were holes for both a square bore and spread bore carb, which is good because I did not want to use an adapter. I took of the stupid riser I had on there and bolted the Qjet on there (OK, camok5 did this while I was out with my girlfriend…thanks). Throttle cable, a coupe of vacuum lines and 12v ignition to the choke and we were ready to go. (NOTE- The two front bolts are 5/16 x 3 ¾) As it turns out, we had the vacuum advance going to the wrong vacuum on the carb and the thing was dieseling like there was no tomorrow. Once we go that straightened out by hooking the vacuum advance to a line that has no vacuum on idle, but does pull once the RPM’s go up, we turned the idle mixture screw out 4 turns, adjusted the idle and were off…
Performance:
[FONT="]To be fair, I should mention that during the process I ditched the high-rise open element for an old TBI air cleaner unit. Results to date have been street only, but I am happy, seems to deliver enough fuel at the right time, not much (if any) in the way of hesitation, and idles well…I will provide an update on what we really want to know…does it stall when the truck is on an incline, after we get back from the “Miller Blazer Trail”[/FONT]
As the title says, this is a review of the process in deciding which carb to get, acquiring it, installing it, and the results to date. If you want any more details, PM me and I will do my best to respond. I am a hack, and this is just my experience, so if you have had a different experience, I cannot speak intelligently about that, but feel free to add to this as if it helps someone...great.
Backgroud:
I have a 1973 Blazer with a 383 roller, headers, and a mild Comp cam that was running an old Carter with sprung needles and a few other customizations. My truck stalled a lot, so much so that everybody who rode with me got used to rolling down hills backwards with the engine off (not always fun).
Selection:
I read a lot on this site about the Truck Avenger, Qjet, and Demon Trucker and originally decided it was between the Holley and Demon, and I did no t even consider the Qjet, mostly because growing up I had always heard "Quadrajunk" and was hesitant to go near it. Here is the link to some questions I had
http://coloradok5.com/forums/showthread.php?p=1487047#post1487047
Finally, I talked to Sean Murphy at SMI and he basically told me that the Qjet has the best design for offroading because of where the fuel bowls are. Instead of fuel sloshing over and dumping down the intake like with a Holley, the fuel bowl was located in the middle of the of the throttle body. Now keep in mind, I don’t know d*ck about carbs so I did some more research on this site and a lot of guys were really hyping up the Qjet. Based on Sean’s input and the stuff I found on the site, the Qjet won (especially because the Demon was very expensive, and the Holley was going to require tuning whereas in theory, the Qjet should be a bolt on piece).
Purchase:
Here’s the deal, SMI has a web page that asks you everything from the lobe of your cam to the year make and model of your car. With all that info (and your credit card number), they build you a carb that’s right for your rig…or at least that is what I understood. Sean told me the build time was three week’s, but after I told him about our trip to “Miller Blazer Trail” on the 18th he was able to get me the carb in time.
Installation:
Since I run an Edlebrock intake, there were holes for both a square bore and spread bore carb, which is good because I did not want to use an adapter. I took of the stupid riser I had on there and bolted the Qjet on there (OK, camok5 did this while I was out with my girlfriend…thanks). Throttle cable, a coupe of vacuum lines and 12v ignition to the choke and we were ready to go. (NOTE- The two front bolts are 5/16 x 3 ¾) As it turns out, we had the vacuum advance going to the wrong vacuum on the carb and the thing was dieseling like there was no tomorrow. Once we go that straightened out by hooking the vacuum advance to a line that has no vacuum on idle, but does pull once the RPM’s go up, we turned the idle mixture screw out 4 turns, adjusted the idle and were off…
Performance:
[FONT="]To be fair, I should mention that during the process I ditched the high-rise open element for an old TBI air cleaner unit. Results to date have been street only, but I am happy, seems to deliver enough fuel at the right time, not much (if any) in the way of hesitation, and idles well…I will provide an update on what we really want to know…does it stall when the truck is on an incline, after we get back from the “Miller Blazer Trail”[/FONT]
Come back(?)
Thanks for the review also.
