|
Sponsored Links (Register now to hide all advertisements) |
|
|
Thread Tools | Display Modes |
10-04-2013, 03:47 PM | #1 |
Senior Member
Join Date: Nov 2011
Location: whitehall pa.
Posts: 439
|
stromberg larg logo 97's
i got two large logo 97's which way leans them out? I have them set since last year with a unisyn. today I changed my plugs, and they are black/sooty. the screws are only out about ONE turn. fuel reg. set at two and a half. exhaust tail pipe black/sooty
|
10-04-2013, 03:54 PM | #2 |
Junior Member
Join Date: Sep 2013
Location: Oregon
Posts: 7
|
Re: stromberg larg logo 97's
turn in to lean it out, turn out to richen the mixture.
|
Sponsored Links (Register now to hide all advertisements) |
|
10-04-2013, 03:59 PM | #3 |
Senior Member
Join Date: May 2010
Location: Michigan
Posts: 464
|
Re: stromberg larg logo 97's
the screws are for your idle a/f mixture. you may have to lower ypur jet size for the main circuit
|
10-04-2013, 08:54 PM | #4 |
Senior Member
Join Date: May 2010
Location: Waddell, AZ
Posts: 2,540
|
Re: stromberg larg logo 97's
got a pressure gauge to check presssure from the regulator??....if you screw in the idle mixture screw, does the engine lose rpm's?....Mike
|
10-04-2013, 09:40 PM | #5 |
Senior Member
Join Date: May 2010
Location: SLC Utah
Posts: 798
|
Re: stromberg larg logo 97's
Jan, I looked in my logbook and found that I sent your two carbs with .043" main jets and #69 powervalves...
This has nearly always been the combination that makes most small to mid size flatheads happy. With this stuff they call gas today, my theory might be subject to change. Check your fuel pressure, because if it's too high, your carbs will think they have larger jets! If need be, PM me with your address and I'll send more jets. Free.
__________________
RIP Tyler... My Son, Helper & Best Friend. Feb '78 to Father's Day '10. www.97-express.com ~ [email protected] |
10-05-2013, 07:34 AM | #6 | |
Senior Member
Join Date: May 2010
Location: North Dakota
Posts: 1,623
|
Re: stromberg larg logo 97's
Sponsored Links (Register now to hide all advertisements)
Quote:
Can't beat that with a stick. Pretty sure Speedway won't do that with their "97" knockoffs.
__________________
I dig coal, which provides motivation for EVs. |
|
10-05-2013, 07:44 AM | #7 |
Senior Member
Join Date: Nov 2011
Location: whitehall pa.
Posts: 439
|
Re: stromberg larg logo 97's
Max, I had been running it at 2 3/4, then went down to 2 1/2. i'll pm you with my address. thanks Max. 52 Henry, I don't want to ever hear speedway again. I experienced there super 97's I went back and forth with them. uncle Max, did me a good deal with these 97's, and I do know that you can't just get a pair bolt them on an things will be perfect. always will need a little adjustment.
|
10-05-2013, 08:05 AM | #8 |
Senior Member
Join Date: May 2010
Location: Near Rising Sun, Maryland
Posts: 10,859
|
Re: stromberg larg logo 97's
Jan, if you are running air cleaners/filters, make sure they are not too restrictive.
__________________
John "Never give up on what you really want to do. The person with big dreams is more powerful than one with all the facts". Albert Einstein |
10-05-2013, 08:57 AM | #9 |
Senior Member
Join Date: May 2010
Location: SLC Utah
Posts: 798
|
Re: stromberg larg logo 97's
Very good point!
__________________
RIP Tyler... My Son, Helper & Best Friend. Feb '78 to Father's Day '10. www.97-express.com ~ [email protected] |
10-05-2013, 09:29 AM | #10 | |
Senior Member
Join Date: May 2010
Location: Northeast Pennsylvania
Posts: 1,582
|
Re: stromberg larg logo 97's
Quote:
Try this to read your plugs: Take a cruise, warm up the engine, get on a nice straight road section. Go wide open throttle for a short distance, kill the engine with the ignition key, coast to a stop. Read plugs. |
|
10-05-2013, 09:30 AM | #11 |
Senior Member
Join Date: May 2010
Location: Millersport, central ohio
Posts: 668
|
Re: stromberg larg logo 97's
This is just a comment, but judging from all the things Uncle Max does for all his customers including me, why would anybody buy anything to do with Strombergs from anywhere else?
|
10-05-2013, 09:32 AM | #12 |
Senior Member
Join Date: Nov 2010
Location: Akron, Ohio
Posts: 299
|
Re: stromberg larg logo 97's
++1
__________________
Gene |
10-05-2013, 09:47 AM | #13 | |
Senior Member
Join Date: Jul 2013
Posts: 196
|
Re: stromberg larg logo 97's
Quote:
+1 for old school Another old tip. Get a stopwatch and use that same long straight section of road (a slight uphill is even better). Get a baseline time from say 40 to 60 mph in top gear (or from road sign to road sign, whatever you want to use). When you make an "improvement", you can check it. I know, you need to compensate for air temp, barometric pressure, humidity, etc., etc., but this will keep you out of trouble (plus reading the plugs). |
|
10-05-2013, 10:21 AM | #14 |
Senior Member
Join Date: May 2010
Location: Waddell, AZ
Posts: 2,540
|
Re: stromberg larg logo 97's
maybe bump down the pressure another half pound??...Mike
|
10-06-2013, 06:25 AM | #15 |
Senior Member
Join Date: May 2010
Location: Lee County Alabama
Posts: 828
|
Re: stromberg larg logo 97's
Re. Uncle Max - When you can deal with the best, why fool around with the rest ???
|
10-06-2013, 07:05 AM | #16 |
Senior Member
Join Date: May 2010
Posts: 4,770
|
Re: stromberg larg logo 97's
Put a vacuum gauge on the engine and when warm adjust the four "IDLE adjustment" screws to get the highest vacuum reading and at the same time smoothest IDLE. For two 97's the final should be ABOUT 2 to 2-1/2 turns out on each screw. This will not cure soot covered plugs. Your going to have to change the main jets and a small change here will make a big difference. Usually one to two sizes smaller. It is better for the engine to run slightly rich than lean. To sync the two carbs together use your Uni-Syn and just adjust the IDLE RPM adjustment so the front and rear carbs match.
|
|
|
Sponsored Links (Register now to hide all advertisements) |
|