strugles to go over 95

[mally69]

OK i checked the plugs, for the most part they are stilll flat black..

[firefighter3931]

OK i checked the plugs, for the most part they are stilll flat black..

It appers to be still running rich. It could be overjetted or possibly your ignition system is weak.

First thing i would do is pull a plug wire and ground it while turning the engine over. What you want to see is a nice blue/white spark. A dull orange spark means the ignition system is weak and this will cause it to run rich.

Second thing is to replace the plugs with a fresh set. If they were fouled it's often difficult to get a descent reading on the jetting w/o replacing them. What's the engine combo ; heads/cam compression etc.... what plugs are you running in there now ? How is the timing set up ?


Ron

[mally69]

PLugs are auto lites factory head range.
440  30 over  with 10.4 compression
906 heads decked 7 thousanths not ported
1.5 ratio roller rockers
hooker super comp 1  3/4 headers
full 3 '' mandrel bent exhaust with an  X pipe
comp 292 dur .501 lift     244@.050   cam is (advanced)
4.10 gears
tci 3000-3500 stall  street fighter convertor
TM-7 intake
mighty demon 750
mopar coil and distributer (mopar chrome ignition box )

Timing is set up as far advanced as i can get it Without valves rattling or pinging.. I was already told that mopar ingnition is junk.

[firefighter3931]

That's a good healthy build.  The MP orange boxes are suspect but the chrome boxes are descent. I would still check the spark quality and see what you've got. If the spark is strong (blueish) then throw a fresh set of plugs in there. Personally, i like the NGK xr-5's for iron headed 440's. You might be jetted rich or the plugs could be too cold (heat range) for your combo.

Fresh plugs will give you an idea of where the jetting is. 


Ron

[mally69]

Ok, ill buy a set tomarrow and plug them in and see what ive got. But ill check my spark color first, then migrate to town

[firefighter3931]

Ok, ill buy a set tomarrow and plug them in and see what ive got. But ill check my spark color first, then migrate to town

Good plan. After you get it fired up assuming the spark is strong....drive it for a few miles on just the front barrels (only) and pull over. Pull a plug and see what you've got....this will tell you if the primary jetting is too fat. If the plugs are black...you're too fat...pretty obvious.

Once the primaries are dialed in you can move onto the secondaries...full throttle for 5-6 seconds and shut it down immediately. Pull a plug and have a look see. adjust jetting accordingly.

Have fun ! 



Ron

[mally69]

Thanks