Vote Please
Thread Starter
Melting Slicks
Joined: Apr 2005
Posts: 3,113
Likes: 4
Vote Please
Ok, this post is not to create an argument, but just to get some feedback.
Yes or No
How many of you that are running a stock 327/350hp or 327/365hp with the original engine components have issues with it running well on today's 93 octane??
Original engine components means-pop up pistons, original cast heads, and the original camshaft
Please ellaborate if you wish.
Thanks for your time
When my car had the original bottom end and the replacement, but original spec 30-30 camshaft and mechanical lifters it did not run very well when hot outside. It ran great when temps were in the 40-75 degree range, but once summer rolled in it was a nightmare. Stalling, detonating, vapor locks-not fun. I tried additives, but they only worked for a short period of time.
Thats my story.
Yes or No
How many of you that are running a stock 327/350hp or 327/365hp with the original engine components have issues with it running well on today's 93 octane??
Original engine components means-pop up pistons, original cast heads, and the original camshaft
Please ellaborate if you wish.
Thanks for your time
When my car had the original bottom end and the replacement, but original spec 30-30 camshaft and mechanical lifters it did not run very well when hot outside. It ran great when temps were in the 40-75 degree range, but once summer rolled in it was a nightmare. Stalling, detonating, vapor locks-not fun. I tried additives, but they only worked for a short period of time.
Thats my story.
Team Owner
Joined: Mar 2003
Posts: 26,118
Likes: 1,874
From: Greenville, Indiana
My '63 has a 327/360 hp with all the stock factory components in the engine. Pop up pistons included. 097 solid cam. '63 stock distributor timing curve with the '64 VC 1810 vacuum advance can.
It runs very well on 89 octane fuel without knocking. Hot or cold weather it starts quickly and idles good. Very seldom does it ever hot start and run rough like some FI engines do. I DO NOT use additives or race gas.
I've run it on gasoline in Indiana, Kentucky and Florida. The only problem I had with gasoline was Hess gasoline in Florida. Two tanks of it.
You should have similar results with the 30-30 cam. Better as far as lack of spark knock and detonation goes.
It runs very well on 89 octane fuel without knocking. Hot or cold weather it starts quickly and idles good. Very seldom does it ever hot start and run rough like some FI engines do. I DO NOT use additives or race gas.
I've run it on gasoline in Indiana, Kentucky and Florida. The only problem I had with gasoline was Hess gasoline in Florida. Two tanks of it.
You should have similar results with the 30-30 cam. Better as far as lack of spark knock and detonation goes.
Last edited by MikeM; Sep 11, 2008 at 07:01 AM.
Race Director
Joined: Jun 2006
Posts: 17,901
Likes: 751
From: Inverness FL
St. Jude Donor '07
but, my 350 LT-1 is essentially the same engine, and i had the same problems; the car would only run decently below 70 degrees.
Bill
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Melting Slicks
Joined: Oct 2004
Posts: 3,345
Likes: 87
From: Northern MN
St. Jude Donor '13-'14-'15-'16-'17
Bill,
Doesn't that sound more like a fuel issue??? The only thing that changes is the external temperature and the only volatile substance is the fuel. Have you tried a couple of gallons of VP or CAM2 with a tank full to see if the problem goes away? I realize that in some states you cannot run racing fuel on the street but with only a couple of gallons in the tank I doubt anyone would know.
Steve
Race Director
Joined: Jun 2006
Posts: 17,901
Likes: 751
From: Inverness FL
St. Jude Donor '07
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Bill,
Doesn't that sound more like a fuel issue??? The only thing that changes is the external temperature and the only volatile substance is the fuel. Have you tried a couple of gallons of VP or CAM2 with a tank full to see if the problem goes away? I realize that in some states you cannot run racing fuel on the street but with only a couple of gallons in the tank I doubt anyone would know.
Steve
Bill,
Doesn't that sound more like a fuel issue??? The only thing that changes is the external temperature and the only volatile substance is the fuel. Have you tried a couple of gallons of VP or CAM2 with a tank full to see if the problem goes away? I realize that in some states you cannot run racing fuel on the street but with only a couple of gallons in the tank I doubt anyone would know.
Steve
and that's what his initial question was about, the new fuel...
i did find that 2 or 3 gallons of leaded racing fuel helped but as i drive mine almost daily, that was impractical and expensive....
Bill
Thread Starter
Melting Slicks
Joined: Apr 2005
Posts: 3,113
Likes: 4
Perhaps i should throw this in as well-
Does it run well druing and after you give it a hard time? Mine would always stall after being on the interstate running at high rpm. The detonation would take place at cruising speed around 45mph. It didnt matter where the timing was set, it always did it when it was hot. The vapor locks are probably due to the chrome fuel line. I had to wrap it in space age foil to keep it cool. it helped
Does it run well druing and after you give it a hard time? Mine would always stall after being on the interstate running at high rpm. The detonation would take place at cruising speed around 45mph. It didnt matter where the timing was set, it always did it when it was hot. The vapor locks are probably due to the chrome fuel line. I had to wrap it in space age foil to keep it cool. it helped
Melting Slicks
Joined: Jun 2006
Posts: 2,660
Likes: 7
From: DFW
In Michigan, 1966 327/350:
CE block (correct crank, pistons and cam), correct carb, intake, heads and distributor
No problems at all. Runs and idles a little rich. Don't know what effect fixing that would have.
Harry
CE block (correct crank, pistons and cam), correct carb, intake, heads and distributor
No problems at all. Runs and idles a little rich. Don't know what effect fixing that would have.
Harry
Melting Slicks
Joined: Oct 2004
Posts: 3,345
Likes: 87
From: Northern MN
St. Jude Donor '13-'14-'15-'16-'17
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That's what I was getting at. With todays fuel you almost have to build the engine to adapt to the fuel used. No way to put 11:1 pistons in these motors anymore as the detonation would be really excessive. My engine is only a 10:1 and it detonates when I step on it. On top of that, with the new computers that automatically adjust timing, etc. the newer fuels will work with no problem in the newer engines. With these old dinasours that lived on high grade premium in the old days it is a problem feeding them now. JMO
Steve
Drifting
Joined: Mar 2006
Posts: 1,578
Likes: 550
From: Florida
I took my original 327 L79 and put a 350 crank in it, roller tip rockers, a nice cam and had the heads machined to 2.02"s. It has a nice solid lifter cam and the engine sounds great and has power in all gears
Team Owner
Joined: Mar 2003
Posts: 26,118
Likes: 1,874
From: Greenville, Indiana
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That's what I was getting at. With todays fuel you almost have to build the engine to adapt to the fuel used. No way to put 11:1 pistons in these motors anymore as the detonation would be really excessive. My engine is only a 10:1 and it detonates when I step on it. On top of that, with the new computers that automatically adjust timing, etc. the newer fuels will work with no problem in the newer engines. With these old dinasours that lived on high grade premium in the old days it is a problem feeding them now. JMO
Steve
That's what I was getting at. With todays fuel you almost have to build the engine to adapt to the fuel used. No way to put 11:1 pistons in these motors anymore as the detonation would be really excessive. My engine is only a 10:1 and it detonates when I step on it. On top of that, with the new computers that automatically adjust timing, etc. the newer fuels will work with no problem in the newer engines. With these old dinasours that lived on high grade premium in the old days it is a problem feeding them now. JMO
Steve
I'd say an engine that behaves this way has some "issues" that it didn't come from the Chevrolet factory with.
Last edited by MikeM; Sep 11, 2008 at 10:23 AM.
Race Director
Joined: Oct 2000
Posts: 15,017
Likes: 79
From: central FL, near the beach.
This could be too lean. Less timing stops pinging, so if it still pings, next i check the a/f. One could select a lower gear until it is fixed, like 3rd instead of 4th at 45mph.
Race Director
Joined: Apr 2005
Posts: 11,265
Likes: 2,131
From: Bowling Green, Kentucky
1967 327/350 HP 4 speed. Original engine, never apart. No problems with 93 octane gas (Exxon Supreme).
Occassionally run Kemco Lead Supreme 130 as a precaution, and to help the valves/valve seats.
Larry
Occassionally run Kemco Lead Supreme 130 as a precaution, and to help the valves/valve seats.
Larry
