Gonna rebuild my 1967 Gto back to stock. But I was wondering what the pros and cons of a 068 over a 067 cam? Would the 068 raise my already high compression motor even more? I was planning on new springs either way. and would the push rods be the same? What if any can you tell me about aviation fuel for these cars?
RMTZ67
067 or 068 cam on stock Gto?
My car has the 068 in a 389 with the tri power. It was rebuilt with stock style pistons and has probably close to the original compression. I'm guessing it is probably 10.5 and I have no problems with 93 octane. The one thing that I like to do is mix a little 110 octane with the 93. To me it is just a little insurance plus is smells great out the exhaust.
I go to the local dirt track and pick up five gallons at a time. I mix 1 gallon of 110 with 4 gallons of 93. For the dozen or more times a year I take the car out it that 5 gallons lasts all year. I am even thinking about mixing it 1 to 5 this year.
I go to the local dirt track and pick up five gallons at a time. I mix 1 gallon of 110 with 4 gallons of 93. For the dozen or more times a year I take the car out it that 5 gallons lasts all year. I am even thinking about mixing it 1 to 5 this year.
The 068 will be BETTER with today's gas than a tighter 067 or even tighter 066. Less cylinder pressure. I've run one in my '67 GTO since 1988 when I overhauled it. That was 90,000 mile ago. Works great, but in CA where I am, I can only get 91 octane fuel, so I yanked the heads and installed 87cc 1970 #15 heads for a CR of about 9.3:1. 068 was a great cam for these engines then, and still is. Go for it!
Didn't know about the specific Pontiac lifters. I got mine from now defunct Indian Adventures. The "068" cam is on a 116 lobe separation angle (LSA). I run the Summit 2801 cam with a little more lift on a 112 LSA.
So since the engine had been rebuilt in the past. I was wondering if my rockers and springs have been changed already? are they stock or aftermarket? anybody have a pic of a original any clues if the springs have been replaced ? What brand/type valve guides and seals are the best?
Attachments
I discovered while taking a fuels and lubes class that aviation fuel while having higher octane, actually makes less power than gasoline. Good to know.
For you guys mixing fuel to increase octane: Have ya'll tried using a GOOD octane booster, such as Torco Accelerator ?
Should be much less hassle. Might be cheaper, too. With a quick price check, Amazon had the lowest I found.
torcoracefuel.net
Should be much less hassle. Might be cheaper, too. With a quick price check, Amazon had the lowest I found.
Amazon.com: TORCO F500010T Unleaded Fuel Accelerator - 32 oz. Bottle, (Case of 6) : Automotive
Buy TORCO F500010T Unleaded Fuel Accelerator - 32 oz. Bottle, (Case of 6): Fuel Additives - Amazon.com âś“ FREE DELIVERY possible on eligible purchases
www.amazon.com
Torco Accelerator Bottle 32oz
Torco Accelerator Bottle 32oz - not just another octane booster, it's a race fuel concentrate race gas fuel additive. It boosts pump gas octane up to 14 points.
torcoracefuel.net
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
