Stalls – Jan ’85

Stalls – Jan ’85

by | Jan 10, 1985

In a Jam

JAM Industries is a Zundfolge advertiser which markets downdraft Weber carburetor kits for 2002’s. The advantage of buying a kit is that you don’t have to run around looking for hoses, clamps, brackets and an air cleaner to go with a 32/36 DGV carb which JAM assures has the right jet­ ting. In addition, all stock emission controls can be preserved, and the kit is approved by the California Smog Patrol. The premium is about $75 over the cost of the un-adorned Weber.

I recently installed a JAM kit on a straight-but-neglected 1976  49-state 2002, which still had all its smog gear. The mechanical installation was very straightforward. The linkage bracket included was perfect and solved one of the conversion’s traditional irrita­ tions. Even a monkey could remove the old carb and put in the Weber.

JAM included the correct Weber adaptor for the choke’s hot water cir­ cuit, and the water hosing installed eas­ ily. Although the choke works fabulously, I would personally convert to a manually operated choke if adding a Weber. This would involve buying a ’68-71 1600/2002 steel lower steering column housing ($1.00 at trailingjunk­ yards), and a choke cable. Worth the effort.

The fuel hose goes on an 8mm nipple on one end and a 6mm nipple on the other, so it’s a loose fit on one end and relies on a hose clamp for sealing. This is not a good practice and an adaptor with two sizes of hose should be part of the kit.

Now, I don’t operate a tinsmithy and it was the air cleaner installation that threw me. You are directed to “Cut 3/8 inch from the bottom of the air cleaner downspout,” without bene­ fit of illustration or further explanation. I wound up cutting the “down­ spout” with my Snap-On dikes and rolling the sheet metal around them like the top of a sardine can on its key. I would like to know how JAM expects the average guy to perform this little procedure cleanly. You also drill three “17/64” (6.5mm) holes into the air cleaner housing.

A custom aluminum casting fits over three carb studs (you remove the fourth) and the air cleaner mounts on top. Here is another problem: The air cleaner did not quite sit low enough. It is about 6mm too high. It does not allow the included (and necessary) washers to fit under the air cleaner retaining nuts, or the nuts themselves to fully seat even without washers. The airbox does not clear the insulation under the hood, and the hose to the air heater box is a tenuous fit as well. It appears as if the casting, which acts as a spacer, was not machined down sufficiently.

Emission controls were the final hurdle. Whilst the  JAM instructions contemplate the retention of the con­ trols, some 2002 owners do not. Hook­ up instructions for vacuum hoses in de-smogged cars would be appropriate (especially by way of diagram), though anyone with an understanding of the theory behind desmogging will have no trouble picking his way through the hoses.

The installed kit dialed in easily and the hood of your car (coning the air cleaner in the process) to see if all the “original” (and required retrofit) emis­ sion devices are in place. Regardless of how little schmutz you have in your auspuff, you fail if it doesn’t look stock. The  JAM kit is a nearly ideal solution for this market.

But here in the less regulated North­ west, the choice is not so clearcut. Emission controls are of only passing interest (most having passed away) and manual chokes are permitted. I would rather have a freer-flowing, bet­ ter looking and better fitting Redline aircleaner than retain the massive stock one, as the JAM kit does. This kit is thus JAM’s answer to a question much more asked in California than here. I don’t know if JAM markets a 49-state version, with Redline air cleaner and manual choke, but I wouldn’t buy anything less.

(After writing the above, I spoke with Tammi at JAM. She advised me that a manual choke set up, less the steel steering column housing, may be special ordered. She also indicated that JAM feels that retaining the stock air cleaner is preferable, claiming eas­ ier maintenance and better performance. Finally, she was unaware of clearance problems caused by the aluminum spacing adaptor, and said they would look into it.)


This article was originally published in the January 1985 edition of Zundfolge