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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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Engine harness connector
Engine harness connector

Andy H, April 3, 20215 yr
- 9 replies
- 1.2k views
Andy H

April 6, 20215 yr
1931 pontiac steering Upgrade???
1931 pontiac steering Upgrade???

cowboydanny, April 6, 20215 yr
- 6 replies
- 933 views
64 kiwi boni

April 6, 20215 yr
Parts
Parts

tigersss, March 28, 20215 yr
- 3 replies
- 768 views
Frosty

March 31, 20215 yr
1970 Pontiac GTO Judge Ram Air iii Engine, Transmission, and Differential Rebuild
1970 Pontiac GTO Judge Ram Air iii Engine, Transmission, and Differential Rebuild

70 GOAT, March 17, 20215 yr
- 4 replies
- 1.3k views
70 GOAT

March 29, 20215 yr
dual line feul sending unit
dual line feul sending unit

somebadhat, March 26, 20215 yr
- 3 replies
- 509 views
Frosty

March 29, 20215 yr
Is my LeMans a bench or bucket?
Is my LeMans a bench or bucket?

Big Chris, February 17, 20215 yr
- 7 replies
- 859 views
Big Chris

March 18, 20215 yr
66 Tempest 326 to 64 389 Engine Swap
66 Tempest 326 to 64 389 Engine Swap

bdubya74, February 28, 20206 yr
- 5 replies
- 1.1k views
Frosty

March 15, 20215 yr
62 389 timing chain cover
62 389 timing chain cover

62 cat, March 13, 20215 yr
- 1 reply
- 503 views
Frosty

March 14, 20215 yr
spark plugs
spark plugs

TerryH, March 1, 20215 yr
- 10 replies
- 899 views
Frosty

March 5, 20215 yr
Water pump height.
Water pump height.

Federated52, February 27, 20215 yr
- 4 replies
- 917 views
Federated52

March 1, 20215 yr
column wiring
column wiring

TerryH, January 13, 20215 yr
- 2 replies
- 939 views
TerryH

March 1, 20215 yr
Need block decoding help!
Need block decoding help!

JimK, February 12, 20215 yr
- 2 replies
- 607 views
Frosty

February 26, 20215 yr
A/C and tuning
A/C and tuning

Dante Reyes, February 23, 20215 yr
- tuning
- air conditioning
- 1 reply
- 497 views
64 kiwi boni

February 26, 20215 yr
Oil roll call. What do you run, and maybe why?
Oil roll call. What do you run, and maybe why?
Ponchoguy, April 17, 20206 yr
- 62 replies
- 7.1k views
64 kiwi boni

February 24, 20215 yr
Numbers natching
Numbers natching

Mike l, February 5, 20215 yr
- 5 replies
- 890 views
stratman

February 16, 20215 yr
Pressurized gas tank
Pressurized gas tank

Tom, February 14, 20215 yr
- 2 replies
- 522 views
Last Indian

February 15, 20215 yr
Coolant leak
Coolant leak

Kenb, February 12, 20215 yr
- 1 reply
- 507 views
TWO LANE BLACK TOP

February 12, 20215 yr
2010 Pontiac g6
2010 Pontiac g6

Bleyva, February 11, 20215 yr
- 0 replies
- 457 views
Bleyva

February 11, 20215 yr
STUMPED !!!
STUMPED !!!

saul, February 9, 20215 yr
- 2 replies
- 516 views
JUSTA6

February 9, 20215 yr
Question
Question

Locks Jan 1, 2038

Lucky, February 9, 20215 yr
- 0 replies
- 396 views
Lucky

February 9, 20215 yr
LT1 Oil Leak
LT1 Oil Leak

TWO LANE BLACK TOP, January 29, 20215 yr
- 19 replies
- 2.4k views
Last Indian

February 7, 20215 yr
how much Dexcool sludge is too much?
how much Dexcool sludge is too much?

Yon, February 7, 20215 yr
- 0 replies
- 451 views
Yon

February 7, 20215 yr
The case of the static alternator and the idler pulley.
The case of the static alternator and the idler pulley.

Max67, February 5, 20215 yr
- 0 replies
- 427 views
Max67

February 5, 20215 yr
Alternator replacement
Alternator replacement

Mada5891, February 4, 20215 yr
- 2 replies
- 457 views
Frosty

February 4, 20215 yr
Newer Firebird 97 Owner
Newer Firebird 97 Owner

Jessica Pettit, January 31, 20215 yr
- 5 replies
- 591 views
JUSTA6

February 3, 20215 yr

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July Pontiac of the Month
1. Keane165's 1970 Lemans

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Octane! Are all things equal? Does it matter?

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

By Frosty · 7 minutes ago7 min
2027 Forever Pontiac Calendar Contest Enter Here

Please only submit your photo once.

By Ringo64 · 1 hour ago1 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 · 1 hour ago1 hr
2027 Forever Pontiac Calendar Contest Enter Here

By Jack Leslie · 1 hour ago1 hr
Roadkill Nights 2026 - August 8, 2026 - Pontiac Michigan

Need to figure out where we will be parking and go from there. Hope we can all meet up.

By JUSTA6 · 4 hours ago4 hr