318 1/8 time improvement

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Hysteric said:
Its no different to leaded fuels. What leaves the colour on the plug is the carbon left over from the burn if the mixture is richer than stoich i.e richer than 14.7. The reason plugs remain white on the porcelain is the mixture there is very lean at time of ignition. When you improve the mixture "Quality" you can get the porcelain to colour as well. If the mixture isn't sufficiently compressed then the heat from ignition has to get it to a stage where it will burn and that takes a lot of the energy and the rest of the burn proceeds slower than it should and require more timing to get the pressure peak at the right place and time........
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Not on US pump gas. He’s not down under is he?
 
Any hydrocarbons fuel. Makes no difference If it's leaded or not.
 
Newbomb Turk said:
He's not running US made race fuel. He's on US made PUMP GAS.

And FWIW, I tune with race gas. No color on the plug. EVER. It's pig rich and a power loser.
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"In the case of our drag car we use VP fuels C14+ We have tried others with different distillation and oxygenation etc but they create other tuning issues. I have never maxed out the capabilities of the C14+ and changing to other fuel charateristics just mucks up my knowledge base."
This plug is from an engine using 2* 1085 cfm 6 barrel SmartCarby carburetors. The compression ratio of this engine is 15.3 to 1 and the cranking pressure is 300 psi. Fuel is VP C14+ (a leaded fuel). The engine timing is 28 degrees. This is lambda 0.83. Note how the shell has Hydrocarbon deposits on it that are consistent with the strap electrode and the colouration on the porcelain. This is indicating a good consistency of overall mixture with possibly optimum ignition timing. It is a well vaporized rich mixture.
This plug is close to ideal but it’s not right in some ways. This from the same engine as above but at lambda .87. But there is very little colour on the porcelain. This engine is using SmartCarby carburetion. 2 * 6 barrel 1085 CFM carburetors. You will notice the difference in deposit granule size by improved atomization. This is one drag strip run. After 4 runs the porcelain also slightly colored with tan,

So he gets colouration on the porcelain on his race engine on US Race Fuel......He does it on all fuels irrespective of where they come from. It has nothing to do with where the fuel is from and everything to do with Vaporization and Homogization and temperature and pressure of the combustion event.

 
Hysteric said:
"In the case of our drag car we use VP fuels C14+ We have tried others with different distillation and oxygenation etc but they create other tuning issues. I have never maxed out the capabilities of the C14+ and changing to other fuel charateristics just mucks up my knowledge base."
This plug is from an engine using 2* 1085 cfm 6 barrel SmartCarby carburetors. The compression ratio of this engine is 15.3 to 1 and the cranking pressure is 300 psi. Fuel is VP C14+ (a leaded fuel). The engine timing is 28 degrees. This is lambda 0.83. Note how the shell has Hydrocarbon deposits on it that are consistent with the strap electrode and the colouration on the porcelain. This is indicating a good consistency of overall mixture with possibly optimum ignition timing. It is a well vaporized rich mixture.
This plug is close to ideal but it’s not right in some ways. This from the same engine as above but at lambda .87. But there is very little colour on the porcelain. This engine is using SmartCarby carburetion. 2 * 6 barrel 1085 CFM carburetors. You will notice the difference in deposit granule size by improved atomization. This is one drag strip run. After 4 runs the porcelain also slightly colored with tan,

So he gets colouration on the porcelain on his race engine on US Race Fuel......He does it on all fuels irrespective of where they come from. It has nothing to do with where the fuel is from and everything to do with Vaporization and Homogization and temperature and pressure of the combustion event.
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Yep, read that before. You both are still wrong.
 
Just went back to the track and dang pretty impressed lol although still slow
When I first went
9.592 @72 mph

IMG_2829.jpeg
 
When I went yesterday
8.795 @79 Mph!

Same gearing same motor things I changed
Bolted some junkyard magnum heads
Added cheap headers
Added 3000 stall converter
Added a 600 cfm Holley

IMG_2828.jpeg
 
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That's a massive change.. not bad for what was done
 
Slantsix64 said:
Thanks! I was trying to estimate my horsepower thru the calculator and it came out to 250 hp lol probably going to build a 5.9 next
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is that calc for at the wheels or engine? cause that's bout 300crank if it was wheels.. almost 1hp/cube...
 
Update! I ended up swapping in a used 5.9 magnum engine, with a reground camshaft and ported the heads in my backyard! I didn’t have so much time to tune it with carb and timing curve because they were closing the drag strip in a month. But regardless I was pretty happy, was hoping for high 7s but all good.

When I first started, running 9.5 @72mph 2.180 60ft 6.236 330

Now I ran a 8.3 @82Mph 1.876 60 Ft 5.259 330

IMG_3567.jpeg


IMG_3584.jpeg
 
Thanks for all the help! All you dudes lived through a badass time and era. Where fixing up a muscle cars was the norm, getting into fights was not a big deal. Wish I would have took advantage of the track next to my house. Never thought it would go away, until it did.
 
You are doing it the way we all did it. Trial and error. Go back and get your report card. Try something else and return to the track.
Kudos to you for not throwing in the towel and keep pushing the car and yourself! Congrats, that... is.... HOT RODDING!
 
Slantsix64 said:
Update! I ended up swapping in a used 5.9 magnum engine, with a reground camshaft and ported the heads in my backyard! I didn’t have so much time to tune it with carb and timing curve because they were closing the drag strip in a month. But regardless I was pretty happy, was hoping for high 7s but all good.

When I first started, running 9.5 @72mph 2.180 60ft 6.236 330

Now I ran a 8.3 @82Mph 1.876 60 Ft 5.259 330

View attachment 1716339005

View attachment 1716339006
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OUTSTANDING
 
Slantsix64 said:
Thanks for all the help! All you dudes lived through a badass time and era. Where fixing up a muscle cars was the norm, getting into fights was not a big deal. Wish I would have took advantage of the track next to my house. Never thought it would go away, until it did.
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Irwindale had gone away once already. I think it's gone for good this time.
So now, in the MOST populous County in the country, by a margin of two to one over the 2nd most, there are NO dragstrips that Joe Average can use (Joe can't use pomona).
Thanks a bunch for that, nhra. (Major sarcasm!).
 
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