Stromberg 97 Jetting

M

mollydog

Member
I have a Stromberg 97 on an Ansen manifold on my Model "A". It also has a Miller Head and header. I need recommendations for jetting size on the Stromberg. Any help would be appreciated.

Mollydog
 
I find that my stock jetted 97 does just fine on my vintage Cragar OHV head with headers. I assume that your Miller head is the new reproduction OHV by Steve Serr.
 
I also have a vintage Crager head. Stromberg jets are stock. I have a problem with the plugs sooting up in a very short time. Also black soot in the tailpipe. What sparkplugs are you using? Other than that the engine runs fine.

Mollydog
 
Check your spark timing the Miller and Cragers like different advance curve than normal A + B models
as mine may have different cam and compression etcetera to yours best to run it on a dyno and get the correct Nos for yours
 
mollydog said:
I also have a vintage Crager head. Stromberg jets are stock. I have a problem with the plugs sooting up in a very short time. Also black soot in the tailpipe. What sparkplugs are you using? Other than that the engine runs fine.

Mollydog
Click to expand...

I also had that problem. I was running Motorcraft TT10 plugs for many years and dealt with sooted-up plugs. :mad: What was happening is that the oil being pumped up on top of the Cragar rocker arm assembly finds it way down loose fitting valve guides causing excess oil to creep into the firing chambers and foul the plugs.

My solution:

Changed out the crappy, too-cold TT10 plugs to Champion W-18, upgraded my distributor cam to the Model B version available from Bill Stipe, and installed a 40KV epoxy filled ignition coil from Pertronix (thanks Purdy Swoft!). Otherwise, my ignition is stock Model A. Needless to say, I now get INSTANT starts, squeaky clean plugs and lots of zip and pep from a MUCH hotter spark. :D
 
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I have a Mallory dual point distributor and a new coil from NAPA. I have Champion
W-10 plugs in it, they were in it when I got the car. I assume they are to cold. I'll see if I can get some W-18"s and see if that helps. I also found I have TWO different main jets in the carb! Don't know where that cam from. (Also on the car when I got it). I have 44's and 45's on the way and a 65PV.
Thanks for your input.

Mollydog
 
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