Need 240 (L24) tune up Specs Please

[TBK1]

Havent recieved out FSM yet and need to tune up sons 73. Think were gonna drop this mallory dual point dizzy in that we have sitting around. What should the point gap be, Dwell, Timing and at what RPM, 4 speed Tranny! Oh and Plug gap for NGK's ! Thanks Guys!

[Blue Meanie]

Gap point on the plugs should be .032.

Good luck. Wanna do mine next?

[TBK1]

If I was Back living in Terre Haute Maybe, (born and Raised)

[Blue Meanie]

ahhh Terre Haute. Steve Martin's favorite place. He even mentions it in "Dead Men Don't Wear Plaid".

[TBK1]

Yea ! he wasnt a reel happy camper there was he!! Gotta head back up there in a month or so and pick up abunch of crap I got in storage!

[TBK1]

Coudl use the rest of the specs! Does anyone know about the point gap with the Dual mallory?

[TBK1]

also just noticed that this mallory doesnt have a vacumm advance, is it missing or normal being it's a dual point ?

[jmark]

Don,

Where did you pick up your son's '73? Pics?

[TBK1]

Madison Ga, taking pics later today.Went to tune it today and got surprised!!!!!!!

Found "NO POINTS". appears to be some type of optical . Has alittle round disk with slots in it that turns thru some type of pick up! also found timing at approx 20 BTDC. dont know if the diszzy modification changes what it is supposed to be at. adjusted carbs slightly and set idle, seems to run smooth but need to verify the timing thing. Also found the vac advance not hooked up, any idea where it hooks to with a dual weber ( I assume) setup. There are 2 vacuum ports at the manifold where the front carb mounts that are blocked off, wonder if I can use one of them .? Will post some pics of the engine area later today??

[JZM]

SPARK PLUG GAP-0.032 TO 0.036in.

POINTS [sINGLE]-0.45 TO 0.55mm.dwell@35-41.

POINTS [stock or mallory]SAME AS STOCK SINGLE.

TIMING-7deg.B.T.D.C [4 spd].@750-800rpm.

VALVE CLEARANCE-[HOT]-INT,0.010in.-EXH,0.012in.

VALVE CLEARANCE-[COLD-INT,0.008in.-EXH,0.010in.

COMPRESSION PRESSURE-[sTD] 178-185psi@300TO400RPM/WOT

FUEL PRESSRUE @750rpm-3.8 TO 4.0

MAXIMUM CENTRIFUGAL ADVANCE@ DIST.-[RPM], 12DEG@[1400]

MAXIMUM VACUUM @IN,-[Hg] 6deg@[18.7]

FIRING ORDER- 153624

VACUUM PORTS ON THE DAUL WEBERS ARE ON THE BACK SIDES[CLOSER TO

THE INT.]ON THE BOTTOM SIDE NOT ON THE INTAKE MANIFOLD OR INT. RUNNERS.PORTS FOR THE VACUUM ADVANCE ARE BEFORE THE THROTTLE PLATE.I HAVE ALL THE FACTORY MANUALS FROM 1970 TO 1999 [Z] AND ALSO HAVE CD TYPE MANUALS FOR THE 350Z AND COUNTLESS TECH NOTES AND TSB's, HOPE SOME OF THIS HELPS.

JZM..

[TBK1]

sure does Thanks JZM

[jmark]

Don,

Looking forward to the pics. Sounds like your family has got Z disease like us.