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Pontiac General Discussion/Questions

Discuss or ask questions on any Maintenance, Modifications and Garage topics that don't fall into any category.

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misfit
misfit

czyhrse, June 6, 20206 yr
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- 662 views
czyhrse

June 6, 20206 yr
running hot
running hot

jimbobob, May 23, 20206 yr
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Frosty

June 3, 20206 yr
Transmission or otherwise?
Transmission or otherwise?

crickel_7, May 30, 20206 yr
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crickel_7

May 30, 20206 yr
Advice for a pony tank
Advice for a pony tank

havoc1482, May 28, 20206 yr
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64 kiwi boni

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Coolant temperature sensor question
Coolant temperature sensor question

SaltyDog89, May 23, 20206 yr
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May 26, 20206 yr
Fuel line, Pump to Carb.
Fuel line, Pump to Carb.

havoc1482, May 25, 20206 yr
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Frosty

May 25, 20206 yr
1970 Lemans tech: horn relay wiring photos not schematic
1970 Lemans tech: horn relay wiring photos not schematic

alwayspmd, September 25, 20196 yr
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alwayspmd

May 24, 20206 yr
Jack and Jack Stand weight limit
Jack and Jack Stand weight limit

Ringo64, May 23, 20206 yr
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Ringo64

May 23, 20206 yr
Hood squeaking
Hood squeaking

clayharrold, May 16, 20206 yr
- 5 replies
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Frosty

May 19, 20206 yr
I’m thinking of putting in a man pedal.
I’m thinking of putting in a man pedal.

Ponchoguy, April 26, 20206 yr
- 1 reply
- 652 views
Stripes

May 15, 20206 yr
Help Someone dropped my oil pump in into my engine!
Help Someone dropped my oil pump in into my engine!

Tracy 69, May 14, 20206 yr
- 1 reply
- 533 views
Frosty

May 14, 20206 yr
Block ID 481988 A275 Code stamped RR
Block ID 481988 A275 Code stamped RR

Doug-69lemans, May 13, 20206 yr
- 0 replies
- 579 views
Doug-69lemans

May 13, 20206 yr
Disk brake conversion
Disk brake conversion

breaknik, February 22, 20206 yr
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breaknik

May 13, 20206 yr
TH400 id tag
TH400 id tag

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- 2 replies
- 534 views
Doug-69lemans

May 13, 20206 yr
Small vacuum leak at the lightswitch
Small vacuum leak at the lightswitch

Etienne, April 19, 20206 yr
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May 12, 20206 yr
Pontiac Bonneville 1966 Trims
Pontiac Bonneville 1966 Trims

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Gurra78

May 4, 20206 yr
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Selling 455

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- engine
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April 28, 20206 yr
If tech efi
If tech efi

1967ryan, April 22, 20206 yr
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- 515 views
1967ryan

April 22, 20206 yr
upgrade rally wheels and tires on 69 400
upgrade rally wheels and tires on 69 400

jcmalex, April 21, 20206 yr
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- 541 views
jcmalex

April 21, 20206 yr
1969 LeMans convertible top switch
1969 LeMans convertible top switch

Nedderz, April 19, 20206 yr
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- 736 views
Frosty

April 21, 20206 yr
Correct headlining for my 65 GP
Correct headlining for my 65 GP

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- 754 views
Frosty

April 17, 20206 yr
65 GP 389
65 GP 389

Fitzy, April 16, 20206 yr
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- 711 views
Fitzy

April 16, 20206 yr
right side mirror 51 Chieftain
right side mirror 51 Chieftain

TPat51 Chieftain, April 13, 20206 yr
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- 585 views
TPat51 Chieftain

April 13, 20206 yr
1972 pontiac lemans sport radiator support
1972 pontiac lemans sport radiator support

mario castro, April 9, 20206 yr
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April 10, 20206 yr
2007 torrent draining battery
2007 torrent draining battery
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April 8, 20206 yr

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Octane! Are all things equal? Does it matter?

didnt know that !!!!

By 64 kiwi boni · 38 minutes ago38 min
Octane! Are all things equal? Does it matter?

I was really shocked when Street Outlaws went down under to race only to find what they called racing fuel wasn't close to the octane we are used to. They had to detune to run the Aussies.

By JUSTA6 · 4 hours ago4 hr
Octane! Are all things equal? Does it matter?

I can't wait for Last Indian's next chapter!

By Frosty · 4 hours ago4 hr
2027 Forever Pontiac Calendar Contest Enter Here

Please only submit your photo once.

By Ringo64 · 5 hours ago5 hr
Octane! Are all things equal? Does it matter?

I want to start this post with an explanation as to why so many things get perceived wrong. More than 17 years ago I was asked to write a paper detailing suspension design, myth & fact! If you ask nearly every car guy who wants a car to handle better than the factory setup & you inquire what they will do to achieve that? They will say nearly to a man, lower the car! This not only is categorically wrong, but the complete opposite! There are a few exceptions where a double wishbone is involved, but that carries a big caveat to do so & Macpherson struts have no exceptions for lowering! Yet to this very day this still dominates the mentality of those looking for a more aggressive handling car. Because those that don’t know or don’t have a clue as to how to accomplish such a task say it’s so! Then the followers who have no clue & looking for the easiest way, buy into it, because they don’t know either & have no interest in finding out the actual fact! Which takes a lot of work & math.
So how this applies to the subject of this post; OCTANE! Do you know what octane is: it’s chemical structure? Do you know how many formulations there are? Do you know how many different octane rating systems there are & why does it matter?
Recently there was a conversation about dieseling, timing & how one of the components that can cause this is octane. It won’t take you much research to find out how much damage low octane fuel & barreling down the road, you know blow out the carbon, can cause! Especially if you ignore what might be there, but can’t hear it! Can detonation occur without you knowing? Can detonation shorten the life of your engine?
To these questions there are these answers. Octane is a hydrocarbon with a chemical formula. Its purpose is to resist an engine's ability to knock or pre-ignite. It also has an impact on the power output, AKA energy output, of gasoline. There are 18 different formulations of octane. In short they are all either methylheptane, dimethylhexane, ethylhexane, trimethylheptane or diethylbutane. All of these have different formulations that give the 18 different forms.
There are three different octane rating systems. This is where the separations start to impact fuel quality. There is the RON system. This stands for research octane number. This system is the most used worldwide. Then there is the MON system. This is used by the industry such as petroleum refiners, car manufacturers, engine builders & fuel marketers. Then there is the USA! We use the AKI rating system! This is an average of the RON & the MON! This is actually superior to the RON system, I will explain why in a bit, but this is why it matters!

By Last Indian · 6 hours ago6 hr

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