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Author Topic:   Spark Plugs
SG236
Gearhead

Posts: 359
From: Jasper, TN, USA
Registered: Dec 2000

posted 03-14-2001 11:50 AM     Click Here to See the Profile for SG236   Click Here to Email SG236     Edit/Delete Message   Reply w/Quote
A couple months ago it was suggest for my combo 351-C stroker that I use the Autolite AR133 plug. Now the engine currently has an autolite 24 which several of the posters on this board was too hot a plug. I just pulled out those AR133's last night and they are 1/4 inch shorter than the 24's. Need some help here. Is the AR133's gonna work ok in the race engine? I would also like to know the cross on a 24 hot plug to a cold plug.

All suggestions welcome!


thanks,

Russ Hood

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Moneymaker
Administrator

Posts: 19686
From: Lyons, IL, USA
Registered: May 99

posted 03-14-2001 01:20 PM     Click Here to See the Profile for Moneymaker   Click Here to Email Moneymaker     Edit/Delete Message   Reply w/Quote
Where are they shorter Russ? The electrode or the threads? The AR 133 is not a "power tip" plug so it is not extended.

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Alex Denysenko Co-Administrator and Moderator NHRA/IHRA/SRA member
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SG236
Gearhead

Posts: 359
From: Jasper, TN, USA
Registered: Dec 2000

posted 03-14-2001 03:00 PM     Click Here to See the Profile for SG236   Click Here to Email SG236     Edit/Delete Message   Reply w/Quote
Alex,

Both the electrode and threads. Have you had any success with this type of plug?


Thanks,

Russ Hood

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Moneymaker
Administrator

Posts: 19686
From: Lyons, IL, USA
Registered: May 99

posted 03-14-2001 07:17 PM     Click Here to See the Profile for Moneymaker   Click Here to Email Moneymaker     Edit/Delete Message   Reply w/Quote
Yes Russ, BIG TIME! AR-32's in MM and AR-92's in Tony's car. We leave the gap at the factory .024 per Autolite engineer/friend Don Wards insistance. I'll do a cross refferance.

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Alex Denysenko Co-Administrator and Moderator NHRA/IHRA/SRA member
Fleet of FoMoCo products
Moneymaker Bio
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SG236
Gearhead

Posts: 359
From: Jasper, TN, USA
Registered: Dec 2000

posted 03-14-2001 08:25 PM     Click Here to See the Profile for SG236   Click Here to Email SG236     Edit/Delete Message   Reply w/Quote
Thanks Alex, I'm going to make the first pass with the 24's and then try the AR133's to compare notes. Anything you can tell me would be great!


Russ Hood

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SteveLaRiviere
Administrator

Posts: 32961
From: Saco, Maine
Registered: May 99

posted 03-14-2001 08:27 PM     Click Here to See the Profile for SteveLaRiviere   Click Here to Email SteveLaRiviere     Edit/Delete Message   Reply w/Quote
.024"? Really?

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'72 Mustang Sprint Coupe 351C 4V/FMX/4.30 Trac Loc
'94 F-150 XL 5.8L/E4OD/3.55 Limited Slip
'97 Probe GTS 2.5L Disposable Commuter
"Live Right! Keep your driveway all Ford!"

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Moneymaker
Administrator

Posts: 19686
From: Lyons, IL, USA
Registered: May 99

posted 03-14-2001 11:00 PM     Click Here to See the Profile for Moneymaker   Click Here to Email Moneymaker     Edit/Delete Message   Reply w/Quote
Yes Steve .024 gap. They are side gapped plugs. The "AR" stands for Autolite Racing. Russ, the Autolite # 24 is a medium range plug. The Motorcraft equivilant is ASF32C which is a stock Boss 351 or 302 plug (heaat range). The AR-133 is NOT a power (extended) tip, therefore shorter than the #24. Alex

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Alex Denysenko Co-Administrator and Moderator NHRA/IHRA/SRA member
Fleet of FoMoCo products
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Rustang1
Gearhead

Posts: 110
From:
Registered: Nov 2000

posted 03-15-2001 12:44 PM     Click Here to See the Profile for Rustang1   Click Here to Email Rustang1     Edit/Delete Message   Reply w/Quote
Nobody believes me!! (I'm refering to an earlier post of mine regarding the autolite sidegapped plugs) I talked to the autolite guy too, and he told me the same thing on the plug gap. I first ran them last summer, mainly because the standard style plugs hit my piston tops. I had the gaps at around .040 and had a bad miss. Called the guy at Autolite and he said set 'em .024-.026, and never go more than .028" (as I recall) even with the best ignition. He explained that the large gap is not needed because the spark is not shrouded from the chamber by the ground strap with these plugs.

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1968 Mustang,Clevor,C4
1969 Torino 351C 4spd
1978 F150 460 C6
1978 F150 351W C6

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Moneymaker
Administrator

Posts: 19686
From: Lyons, IL, USA
Registered: May 99

posted 03-15-2001 01:00 PM     Click Here to See the Profile for Moneymaker   Click Here to Email Moneymaker     Edit/Delete Message   Reply w/Quote
I beleive you Rustang!

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Alex Denysenko Co-Administrator and Moderator NHRA/IHRA/SRA member
Fleet of FoMoCo products
Moneymaker Bio
US Class Nationals link

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MrXerox
Gearhead

Posts: 322
From: Oklahoma City, Oklahoma
Registered: Nov 2000

posted 03-15-2001 10:30 PM     Click Here to See the Profile for MrXerox   Click Here to Email MrXerox     Edit/Delete Message   Reply w/Quote
What is the formula to figure out which plugs you should use in a particular engine? I have a 351C with 4BBL quench heads, 850DP, Xcellerator intake, solid roller cam 244 @ .050 .623 lift and an auto trans with 3500 stall. Should I use the same plug as Dave? Thanks...
Sean.

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Moneymaker
Administrator

Posts: 19686
From: Lyons, IL, USA
Registered: May 99

posted 03-15-2001 11:08 PM     Click Here to See the Profile for Moneymaker   Click Here to Email Moneymaker     Edit/Delete Message   Reply w/Quote
Flat top pistons use AF-22 Motorcrafts. Pop up pistons use AF-12 Motorcrafts. Via Alex formula.

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Alex Denysenko Co-Administrator and Moderator NHRA/IHRA/SRA member
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MrXerox
Gearhead

Posts: 322
From: Oklahoma City, Oklahoma
Registered: Nov 2000

posted 03-16-2001 09:53 AM     Click Here to See the Profile for MrXerox   Click Here to Email MrXerox     Edit/Delete Message   Reply w/Quote
What does the Alex formula compute the proper gap for these to be at for street/strip use?

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Moneymaker
Administrator

Posts: 19686
From: Lyons, IL, USA
Registered: May 99

posted 03-16-2001 01:15 PM     Click Here to See the Profile for Moneymaker   Click Here to Email Moneymaker     Edit/Delete Message   Reply w/Quote
What ignition system do you have Sean? Give me all of the details, distributor, box, coil, wires, etc. Thanks

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Alex Denysenko Co-Administrator and Moderator NHRA/IHRA/SRA member
Fleet of FoMoCo products
Moneymaker Bio
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MrXerox
Gearhead

Posts: 322
From: Oklahoma City, Oklahoma
Registered: Nov 2000

posted 03-16-2001 04:05 PM     Click Here to See the Profile for MrXerox   Click Here to Email MrXerox     Edit/Delete Message   Reply w/Quote
Thanks Alex, I have a MSD 6AL box an MSD billet distributor mechanical advance all in by 2500 with timing control and a MSD blaster coil feeding my new Crane 8.5mm sleved Quikfire trick set of wires I got for $50.00 (Thanks for the sale tip Steve!)

[This message has been edited by MrXerox (edited 03-16-2001).]

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Moneymaker
Administrator

Posts: 19686
From: Lyons, IL, USA
Registered: May 99

posted 03-16-2001 04:12 PM     Click Here to See the Profile for Moneymaker   Click Here to Email Moneymaker     Edit/Delete Message   Reply w/Quote
.035 is my recomendation with AF-32 or AF-22 plugs Sean.

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Alex Denysenko Co-Administrator and Moderator NHRA/IHRA/SRA member
Fleet of FoMoCo products
Moneymaker Bio
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Ryan Wilke
Gearhead

Posts: 1450
From: Stanton, Michigan 49707
Registered: Oct 2000

posted 03-16-2001 04:54 PM     Click Here to See the Profile for Ryan Wilke   Click Here to Email Ryan Wilke     Edit/Delete Message   Reply w/Quote
Alex, do me, do me next! What plugs and gap do you recommend for...

Mallory Unilite distributor, Mallory Hyfire IVc CD box #692, Mallory ProMaster coil #29625, initial @ 14 deg and full in @ 35 deg @ 2500 rpms. Plug wires are Accel 8.8 RFI spiral core. Current plugs are AutoLite #45 set at 040 gap.

SBF 306", 351W D0OE heads w/1.94-1.60 valves, pop-up pistons,Ultradyne solid-lifter, dur 252/260 @050, 586/608 lift, 106 LS. 028" cold lash, 110 TORCO, 4-spd, 4.56 spool with 9" slicks.

Thanks! Ryan

[This message has been edited by Ryan Wilke (edited 03-18-2001).]

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SG236
Gearhead

Posts: 359
From: Jasper, TN, USA
Registered: Dec 2000

posted 03-23-2001 05:40 PM     Click Here to See the Profile for SG236   Click Here to Email SG236     Edit/Delete Message   Reply w/Quote
OK Alex

I'm open to suggestions on the correct/best plug:

351-C Stoker
compcams .648 lift, I think the duration is .270
strip dominator
heads are 2.19/1.76

MSD 7AL-2
MSD Ultra Coil
MSD Plug Wires (racing)
MSD two-step

Leave the line at 5500 and shift at 7200.
1.76 glide and 4.88 (soon to be 5.67 rear gear)

Thanks


Russ Hood

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Moneymaker
Administrator

Posts: 19686
From: Lyons, IL, USA
Registered: May 99

posted 03-29-2001 01:04 AM     Click Here to See the Profile for Moneymaker   Click Here to Email Moneymaker     Edit/Delete Message   Reply w/Quote
Ryan, BF-22 Motorcraft (#33 Autolite) gapped at .035 MAX! Russ, I need to know the compression ratio and deck height. I'll try to be back on again sometime tomorrow night (Friday).

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Alex Denysenko Co-Administrator and Moderator NHRA/IHRA/SRA member
Fleet of FoMoCo products
Moneymaker Bio
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brockjoe
Gearhead

Posts: 961
From: Sioux City, Iowa
Registered: Oct 99

posted 03-29-2001 07:40 AM     Click Here to See the Profile for brockjoe   Click Here to Email brockjoe     Edit/Delete Message   Reply w/Quote
are these recomended for a daily driver?

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SG236
Gearhead

Posts: 359
From: Jasper, TN, USA
Registered: Dec 2000

posted 03-29-2001 11:39 PM     Click Here to See the Profile for SG236   Click Here to Email SG236     Edit/Delete Message   Reply w/Quote
Maybe it will clear up soon in Memphis Alex.

Comp ratio is 14:1 and I'll have to find out about deck height. I know the block was decked but don't remember how much. I'll try to call t'morrow. This thing is killing me!

Have you got any passes in yet?


Thanks,


Russ Hood

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Moneymaker
Administrator

Posts: 19686
From: Lyons, IL, USA
Registered: May 99

posted 03-31-2001 12:15 AM     Click Here to See the Profile for Moneymaker   Click Here to Email Moneymaker     Edit/Delete Message   Reply w/Quote
Joe, these are recomendations for the BEST possible performance. You take it from there where you would want to apply it. Russ I would like to see you run an AF-901 Motorcraft based on the compression and assuming a "0" deck. We got to make some passes yesterday. See Eric's post above.

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Alex Denysenko Co-Administrator and Moderator NHRA/IHRA/SRA member
Fleet of FoMoCo products
Moneymaker Bio
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