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What type of gas do you run?
#11
(07-12-2018, 11:25 PM)donkost Wrote: The transport company owner that delivered my last car saw my '71 Mach 1 429 CJ-R and said I should be running this:

https://vpracingfuels.com/product/vp-110/

Lol.  Anyone else notice that the ethanol-blended gas stinks like $hit?  When I was a kid I used to enjoy the smell of real gas when I went along on a fill-up with my dad.  On modern closed system fuel injected vehicles you really don't smell the fuel.  But on a old-school carbureted vehicle, when you park in the garage after a good run and close the garage door, that corn juice / gas smell will permeate the area.  I guess we're pretty much stuck with that fuel for life.  More and more people are getting on board with what a boondoggle it is for the various parties involved.

 YES!!!
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#12
Finding non-ethanol gas around here (Nebraska) is not hard.  Most places have 87 octane E-10, 89 octane (no ethanol) and 91 octane premium.  I can't find 93 octane anywhere around here.  My engine pings like popcorn on the 91 premium, and those miracle-in-a-bottle octane boosters don't work.  I resorted to mixing my gas 50/50 premium gas and LL100 octane avgas.  No ping, the 429CJ-R runs strong.  Buying, hauling and mixing gas is a hassle, but you sacrifice for the ones you love!

Mach_One
1971 J-Code Owner
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#13
(07-18-2018, 07:19 PM)Mach_One Wrote: Finding non-ethanol gas around here (Nebraska) is not hard.  Most places have 87 octane E-10, 89 octane (no ethanol) and 91 octane premium.  I can't find 93 octane anywhere around here.  My engine pings like popcorn on the 91 premium, and those miracle-in-a-bottle octane boosters don't work.  I resorted to mixing my gas 50/50 premium gas and LL100 octane avgas.  No ping, the 429CJ-R runs strong.  Buying, hauling and mixing gas is a hassle, but you sacrifice for the ones you love!

 I'm not familiar with 429's at all, but if they behave anything like a 71 351C 4V M code, you might want to look at your distributor for degrees and curve. Mine pinged like popcorn too until I finally figured out HOW  to build a distributor. I've posted on this many times if you care to search just to give you an idea. I can now run on 91 non-ethanol without any pinging. My settings are; 10L slot width (.410") or 20degrees on the crank, 1 factory heavy spring set to just loose on the pegs and 1 Mr.Gasket 925D set with mild tension. The initial is currently at 16 degrees for a total of 36* total mechanical plus about 6 deg. of vacuum advance. This is on a Motorcraft factory dist. Non of that HEI sh*t for me. Many of the reman distributors I found are built with a 15L slot or 30 deg. crank, which only allows about 4-6 deg. of initial before you run into too much advance, hence pinging with any more. I also run a Pertronix Ignitor II and coil.

EDIT: I did not mention my engine is a modest 10:1 with a mild cam just slightly above stock. 64 cc CC heads, stock intake and exhaust manifolds.
My fuel system is now also upgraded to tolerate ethanol IF I have too. Our Sunoco 94, owned by Petro-Canada, is now 10% corn crap.
Of course if you motor is built up super high, no amount of timing mods will fix it as far as I know...……… which isn't much!!
Geoff.
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#14
The Torco and VP octane boosters do work as advertised. I've run Torco in cars with O2 sensors and VP in the older cars. As has been previously stated, too much timing, too tame of a cam, too much compression, and low octane fuel all contribute to "pinging", detonation/pre-ignition. Chuck
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#15
Based upon my personal tail pipe emissions it appears I run on Methane Big Grin Atomic

[Image: 1_01_07_15_8_53_18.png]

"I love my Hookers!" and "Get some Strange" probably have a different connotation to non automotive enthusiasts!
[+] 1 user Likes Jeff73Mach1's post
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#16
(07-19-2018, 08:54 AM)Stanglover Wrote:
(07-18-2018, 07:19 PM)Mach_One Wrote: Finding non-ethanol gas around here (Nebraska) is not hard.  Most places have 87 octane E-10, 89 octane (no ethanol) and 91 octane premium.  I can't find 93 octane anywhere around here.  My engine pings like popcorn on the 91 premium, and those miracle-in-a-bottle octane boosters don't work.  I resorted to mixing my gas 50/50 premium gas and LL100 octane avgas.  No ping, the 429CJ-R runs strong.  Buying, hauling and mixing gas is a hassle, but you sacrifice for the ones you love!

 I'm not familiar with 429's at all, but if they behave anything like a 71 351C 4V M code, you might want to look at your distributor for degrees and curve. Mine pinged like popcorn too until I finally figured out HOW  to build a distributor. I've posted on this many times if you care to search just to give you an idea. I can now run on 91 non-ethanol without any pinging. My settings are; 10L slot width (.410") or 20degrees on the crank, 1 factory heavy spring set to just loose on the pegs and 1 Mr.Gasket 925D set with mild tension. The initial is currently at 16 degrees for a total of 36* total mechanical plus about 6 deg. of vacuum advance. This is on a Motorcraft factory dist. Non of that HEI sh*t for me. Many of the reman distributors I found are built with a 15L slot or 30 deg. crank, which only allows about 4-6 deg. of initial before you run into too much advance, hence pinging with any more. I also run a Pertronix Ignitor II and coil.

EDIT: I did not mention my engine is a modest 10:1 with a mild cam just slightly above stock. 64 cc CC heads, stock intake and exhaust manifolds.
My fuel system is now also upgraded to tolerate ethanol IF I have too. Our Sunoco 94, owned by Petro-Canada, is now 10% corn crap.
Of course if you motor is built up super high, no amount of timing mods will fix it as far as I know...……… which isn't much!!
Geoff.

You are right, I should have a look at the distributor.  My 429CJ is completely stock with points in the distributor and 11:3:1 compression.  She'd ping like crazy anytime I dropped the hammer.  Avgas makes her happy.  Thanks for the info!

Mach_One
1971 J-Code Owner
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#17
Excellent post and great advice. A self tuned distributor is the way to go. Duraspark distributors work great, I use them on all of my Ford builds with great results.

351w - Ford racing GT40X 178 cc aluminum heads - Ford racing(crane) 1.7 roller rockers - Comp Cams 280H magnum cam .544" / .544" lift - ARP fasteners - hedman longtubes - magnaflow exhaust with X pipe -  MSD digital 6al box - MSD coil - optima red top battery - tuff stuff 140 amp alternator - ported weiand stealth intake  - edelbrock 1406 600 carb  - edelbrock rpm fuel pump - march pullies and brackets - Be cool fan controller - derale electric fan - FMX trans - motive 3.50 gears - traction lok - competition engineering subframe connectors - lakewood traction bars.                                            










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#18
(07-19-2018, 10:08 PM)Mach_One Wrote:
(07-19-2018, 08:54 AM)Stanglover Wrote:  

Removed old posts to save space!

You are right, I should have a look at the distributor.  My 429CJ is completely stock with points in the distributor and 11:3:1 compression.  She'd ping like crazy anytime I dropped the hammer.  Avgas makes her happy.  Thanks for the info!

 But Avgas gets VERY expensive!! Premium is bad enough!
 As mentioned, a Dura Spark is a good distributor by all accounts and you can buy them built and tuned for YOUR engine. I think the company is Performance Distributors, not sure without double checking.
Again I make no claim to be an expert, but to me it seems like as you are running points in an old dizzy, I'd be looking a getting a rebuilt Motorcraft or Dura Spark and if necessary re-slotting the smallest slot as required for the 429's best max initial advance. Like I also said, I'm not familiar with the big engines, so do your research. 351's like 14 to 16 degrees of initial, but only tolerate 34 -36 max mechanical, therefore only 20 deg. on the crank (10L slot) and this also may be dependent on the build of a particular engine. This is what I have come to learn over the last 10 years, largely from my own experimentation.
Good luck with it,
Geoff.
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#19
(07-20-2018, 08:22 AM)Stanglover Wrote:
(07-19-2018, 10:08 PM)Mach_One Wrote:
(07-19-2018, 08:54 AM)Stanglover Wrote:  

Removed old posts to save space!

You are right, I should have a look at the distributor.  My 429CJ is completely stock with points in the distributor and 11:3:1 compression.  She'd ping like crazy anytime I dropped the hammer.  Avgas makes her happy.  Thanks for the info!

 But Avgas gets VERY expensive!! Premium is bad enough!
 As mentioned, a Dura Spark is a good distributor by all accounts and you can buy them built and tuned for YOUR engine. I think the company is Performance Distributors, not sure without double checking.
Again I make no claim to be an expert, but to me it seems like as you are running points in an old dizzy, I'd be looking a getting a rebuilt Motorcraft or Dura Spark and if necessary re-slotting the smallest slot as required for the 429's best max initial advance. Like I also said, I'm not familiar with the big engines, so do your research. 351's like 14 to 16 degrees of initial, but only tolerate 34 -36 max mechanical, therefore only 20 deg. on the crank (10L slot) and this also may be dependent on the build of a particular engine. This is what I have come to learn over the last 10 years, largely from my own experimentation.
Good luck with it,
Geoff.

Yeah, spendy!  Good thing it's not a daily driver!  Last time I bought avgas, it was $4.00/gal.  Since there's no road tax, they won't put it in your car.  They'll sell it, just not put it in!  I can haul about 22 gallons of avgas in 3 gas cans that I have.  It's enough for a few tanks of mix gas.  The old boy at the airport looks at me and grins and says: "What do you got that you need avgas for?" "429 Cobra Jet" I reply.  He grins even bigger after hearing that and proceeds to tell me how the drag racers come over with their 55-gallon drums to get them filled, LOL!

My car is restored and the engine is completely stock/original with correct dizzy and points in it.  I don't want to change rather keep it original.  Timing and advance curve are still worth looking at though.  Thanks!

Mach_One
1971 J-Code Owner
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