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408 Fuel System
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Big Dave
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PostPosted: Wed May 04, 2016 9:38 pm    Post subject: Reply with quote

Sorry!

Gotta clean my glasses! I thought I read that as leaded race fuel which is usually the higher octane stuff as it is hard to get above 106 without lead.

Big Dave
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Paul P
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Location: Townsend, Mass.
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1971 Chevrolet Chevelle

PostPosted: Sat May 28, 2016 5:48 am    Post subject: Reply with quote

Tach adapter did the trick again. Car was running like shit popping because of what it learned from the lack of the tach adapter. After the first car show in town I took it to a spot that I could do some timing in 1st and second gear. Slowly brought it up to 7000 in 1st gear and it seemed to find itself again. Drove like a 1/2 mile in second and in the next straight section of road I was able to do a second gear blast up to 7000 again. Man this is fun. Well over 100mph. Seems back🎉. Now I will transfer it as Keith recommended and smooth it. All good.
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2001 Focus 2.0 Zetec
stock cams, bolt-ons and tune
15.63@87 MPH 1/4mi

1971 - Chevelle 408 SBC N/A
6.86@102.5 MPH 1/8mi
10.78@122 MPH 1/4mi
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10sec.et
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1969 Oldsmobile Cutlass

PostPosted: Mon May 30, 2016 10:46 pm    Post subject: Reply with quote

Paul P wrote:
Hi Dave,
Lead slowly coats the sensor and my Innovate MTXL has been coated to death a few times. If it wasn't for the replacement cost of the Holley calibrated Bosch at $140 or the NTK at $240 I would stay with the leaded fuel.

I did say I plan on using VP unleaded in my post.

MotorSport 109 is an oxygenated fuel so the tune will be different.

Unleaded Extreme is the other that isn't oxygenated.


ive been playing around with adding Xylene to 93 octane. seems to work pretty well at 25%. although, I'm having carb issues so I still haven't got a full pass under boost. it seems very promising and no lead to kill my second wideband. disgusted

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af2 wrote:
It seems we can look at our magical Balls and come up with a fix?

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Paul P
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Location: Townsend, Mass.
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1971 Chevrolet Chevelle

PostPosted: Tue May 31, 2016 7:56 am    Post subject: Reply with quote

Hi Keith,
Where do you get that much Xylene?
Paul

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2001 Focus 2.0 Zetec
stock cams, bolt-ons and tune
15.63@87 MPH 1/4mi

1971 - Chevelle 408 SBC N/A
6.86@102.5 MPH 1/8mi
10.78@122 MPH 1/4mi
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Big Dave
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PostPosted: Tue May 31, 2016 9:45 am    Post subject: Reply with quote

Another name for Xylene is lacquer thinner (back before the world switched to water based paint).

Big Dave
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10sec.et
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1969 Oldsmobile Cutlass

PostPosted: Tue May 31, 2016 7:54 pm    Post subject: Reply with quote

i get it in the 5 gallon can from our paint supplier. most paint stores will have it. its $60 for 5 gallons where i buy it or its $20 a gallon at Lowes or Home Depot.
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af2 wrote:
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Paul P
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Location: Townsend, Mass.
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1971 Chevrolet Chevelle

PostPosted: Thu Jun 02, 2016 1:08 pm    Post subject: Reply with quote

What do you think the octane benefit is points wise from pump 93?

What kind of fumes does it produce when it is running?😬

_________________
2001 Focus 2.0 Zetec
stock cams, bolt-ons and tune
15.63@87 MPH 1/4mi

1971 - Chevelle 408 SBC N/A
6.86@102.5 MPH 1/8mi
10.78@122 MPH 1/4mi
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Big Dave
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PostPosted: Sat Jun 04, 2016 3:42 pm    Post subject: Reply with quote

Two gallons of Xylene added to Four gallons of 93 octane pump gas will get you a little less than six gallons of 100 octane lead free fuel. Whether it will be as cheap as buying VP in a five gallon pail I don't know. It is what the refinery adds to 87 to raise it to 93 octane, but you can not drive it much past 104 even if you mixed it one to one. You have to go to other chemicals to raise it higher than that. (or just burn straight Xylene).

As to smell I can't smell anything as I am allergic to the world and my nose is usually stuffed up (or I am having a sinus infection accompanied by chronic sinus headaches). So I cannot tell you what it smells like (my wife has a reproduction of London's Kensington Gardens out front with a 107 rose bushes but to me they are only expensive thorn bushes as I can not smell the blooms.

Big Dave
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10sec.et
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1969 Oldsmobile Cutlass

PostPosted: Sat Jun 04, 2016 11:23 pm    Post subject: Reply with quote

i don't really know how much it boosts octane. i have no way to test it. ive heard everything from barely a couple points to over 116. i do know it helps. 25% or more is where its most noticeable. the smell is better than pump gas but it doesnt really smell like race fuel either. dont forget to add a top lube. i just use a few ounces of ATF. if i ever get rid of all of my fuel gremlins, ill be able to do some more in-depth testing. i can say the lawnmower LOVES it.
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af2 wrote:
It seems we can look at our magical Balls and come up with a fix?

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Paul P
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Location: Townsend, Mass.
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1971 Chevrolet Chevelle

PostPosted: Sun Jun 12, 2016 3:43 pm    Post subject: Reply with quote

Wow Dave. The gardening is expensive I have a similar situation with my wife but it sucks to hear you have that added negative effect.

Keith I wonder what affect the trans fluid has on the octane? Maybe a plus?

_________________
2001 Focus 2.0 Zetec
stock cams, bolt-ons and tune
15.63@87 MPH 1/4mi

1971 - Chevelle 408 SBC N/A
6.86@102.5 MPH 1/8mi
10.78@122 MPH 1/4mi
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Big Dave
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PostPosted: Mon Jun 13, 2016 12:38 pm    Post subject: Reply with quote

Oil in the fuel air stream lowers Octane overall.

You can find charts on line for the various chemical additive used by the refiners to race he octane rating of theiur gas. In Port Tampa we receive most of the gas for central and south Florida barged across the Gulf from N'orleans. All of the manufactures have a tank farm here and add to raw gas that they all share in common their own swill of chemicals (you can buy Techroline that Standard Oil uses at your discount auto store they are so proud of it they bottle it for resale). Among the other additives are alcohol obtained from fermented orange juice pulp and rinds as well as crushed sugar cane stalks. They also add in Toluene, and Triptane to increase the base 87 octane to 93 octane.

Big Dave
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10sec.et
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1969 Oldsmobile Cutlass

PostPosted: Mon Jun 13, 2016 10:23 pm    Post subject: Reply with quote

Big Dave wrote:
Oil in the fuel air stream lowers Octane overall.

Big Dave



i was wondering about that. needs to be something readily available though. specialty additives that are hard to come by kind of defeat the purpose of making your own. Ive heard of guys using the Lucas stuff but wouldn't that be the same as oil? what about the top lube for methanol?

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It seems we can look at our magical Balls and come up with a fix?

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Big Dave
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PostPosted: Tue Jun 14, 2016 2:21 pm    Post subject: Reply with quote

10sec.et wrote:
Big Dave wrote:
Oil in the fuel air stream lowers Octane overall.

Big Dave



i was wondering about that. needs to be something readily available though. specialty additives that are hard to come by kind of defeat the purpose of making your own. Ive heard of guys using the Lucas stuff but wouldn't that be the same as oil? what about the top lube for methanol?


Keith you are correct a top end lube is good idea. I only mention the oil dropping the octane in response to the question.

Oil dripping down the valves from a broken oil slinger on a SBC is a common issue that leads to broken pistons on old engines as it is one of the contributing factors listed as a cause of detonation.

Problem with mixing your own is the cost; and how long it will last. These additives are very light weight aromatics that boil off rapidly even at room temp. If you are worried about a long life they are also very carcinogenic. I used to buy race gas in 55 gallon drums before April 19, 1995. After that it became difficult to buy as paperwork and toxic waste issues made it more difficult to store out in the barn. After 9-11 it became near impossible to have it dropped off the back of a truck anymore without having a Homeland Security agent check me out and verify I wasn't a tar-or-est. I also was required to pay for the disposal of the empty drums up front (they didn't care if I burned them or threw them in a ditch afterword as they had the toxic waste disposal fee already). That was the end of my 14:1 BBC in my 1970 Nova body, and buying race gas 330 gallons at a time.

Big Dave
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Paul P
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Location: Townsend, Mass.
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1971 Chevrolet Chevelle

PostPosted: Tue Jul 12, 2016 9:01 pm    Post subject: Reply with quote

Some sad news to share with you all. My friend Gary with the Bridgeport who made this project possible performing all the machine work on the intake manifold, fuel rails and spacer passed away at the age of 51 Sunday Night in his sleep. He also made the fan shroud pieces on my car as well as countless other cool hot rodding parts. Rest in peace Gary. Crying or Very sad
_________________
2001 Focus 2.0 Zetec
stock cams, bolt-ons and tune
15.63@87 MPH 1/4mi

1971 - Chevelle 408 SBC N/A
6.86@102.5 MPH 1/8mi
10.78@122 MPH 1/4mi
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af2
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1933 Willys Coupe

PostPosted: Tue Jul 12, 2016 9:51 pm    Post subject: Reply with quote

Damn!!!!!!!!!!!! 1 year younger than I..
Sorry to his family!!
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