Vast Engine Problems
Le Mans Master
Joined: Apr 2006
Posts: 5,403
Likes: 95
you did not have to pull the big cam LT1s had dur. fiqures like
yours 9.00 comp in 71, they did not burp and stumble around.
Torque converter please. May the horse power be with you.
yours 9.00 comp in 71, they did not burp and stumble around.
Torque converter please. May the horse power be with you.
Last edited by Little Mouse; Aug 27, 2006 at 05:36 PM.
Thread Starter
Safety Car
Joined: Jun 2005
Posts: 3,841
Likes: 0
From: Inver Grove Minnesota
I figure it has about 9.4:1 right now. The problem was a mixture of many things, a couple of the rockers were out of adjustment and it was not on the idle circuit. The timing was close but needed a little adjustment. Along with the carb.
Thread Starter
Safety Car
Joined: Jun 2005
Posts: 3,841
Likes: 0
From: Inver Grove Minnesota
Originally Posted by Little Mouse
rumpity, rumpity , rumpity.
Originally Posted by sperkins
That's great news. Hope your Mom has a new outook on the Almighty Corvette Forum.
Now go burn some rubber!
Now go burn some rubber!
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Le Mans Master
Joined: Apr 2006
Posts: 5,403
Likes: 95
justin my 78 454 3/4 ton pickup, turbo 400, 373 posi, I would load it up against the brake it would not burn rubber 5 feet, must have had a
no stall converter. You would think a pickup with probably 60
percent of the weight on the front tires would burn some rubber.
no stall converter. You would think a pickup with probably 60
percent of the weight on the front tires would burn some rubber.
Last edited by Little Mouse; Aug 27, 2006 at 06:45 PM.
Melting Slicks
Joined: Mar 2006
Posts: 3,342
Likes: 7
From: Connecticut
Originally Posted by sperkins
That's great news. Hope your Mom has a new outook on the Almighty Corvette Forum. 
Now go burn some rubber!
Now go burn some rubber!
I can see it now
Ill take the keys until your 30
Melting Slicks
Joined: Jan 2004
Posts: 2,672
Likes: 1
From: New Cumberland PA
Originally Posted by JustinD
I opened her up a bit today gets up to 60 pretty quick for the rear end I have in it.
Last edited by mandm1200; Aug 27, 2006 at 07:15 PM.
Melting Slicks
Joined: Mar 2006
Posts: 3,342
Likes: 7
From: Connecticut
Originally Posted by JustinD
I opened her up a bit today gets up to 60 pretty quick for the rear end I have in it.
Im glad you will be able to use it next week to show the ricers what a real car is
Please be careful Justin......... Im serious
All that work and frustration probably wont look to good wrapped around a tree.
Not to mention your brains as well
Le Mans Master
Joined: Apr 2006
Posts: 5,403
Likes: 95
Damn was it June I was only guessing July, Augest. Justin may
be the only 18 yr old with gray hair in Minnesota, Or did he go bald
from pulling it out. I tried my damndest to get him to use the FORD
tune up tool.
be the only 18 yr old with gray hair in Minnesota, Or did he go bald
from pulling it out. I tried my damndest to get him to use the FORD
tune up tool.
Last edited by Little Mouse; Aug 27, 2006 at 08:15 PM.
Instructor
Joined: Jul 2004
Posts: 245
Likes: 0
Justin...
Glad to hear you are happy with the results. Once you get some gears and a decent stall in there it will scream.
The problem with the car...
There were a couple of the rockers that needed adjustment. The carb was not on the idle circut. The timing was jumping all over the place. One minute it would be at 8 BTDC, then it would be 12 BTDC. It had a total advance of only 25 BTDC. All timing was without the vac. advance hooked up.
Pulled the cap and inspected the weights. They were aftermarket ones, and as Lars says it's best to use the factory weights. The weights were very stiff and wouldn't allow full advance, not to mention that they would not return to the closed position. We replaced the weights with the factory ones (which worked smooth), then with the springs out we checked how much advance the dist. would allow with the installed bushings. We then played around with the springs to find some that would work. The advance now comes in at about 1400-1500 rpm, with full advance all in at about 2700 rpm. Total is set at 35 degrees without vac. advance. I adjusted the idle mixture screws to allow max vac. and idle speed. Then I adjusted the curb idle speed for about 750 rpm in drive.
No hesitation, no stumble, no drama.
It does need a stall and steeper gears to help it out of the hole, but it is plenty driveable as is. All in all a pretty good outcome.
Justin, remember my number when and if you need help with your project.
Later,
Jeff
Glad to hear you are happy with the results. Once you get some gears and a decent stall in there it will scream.
The problem with the car...
There were a couple of the rockers that needed adjustment. The carb was not on the idle circut. The timing was jumping all over the place. One minute it would be at 8 BTDC, then it would be 12 BTDC. It had a total advance of only 25 BTDC. All timing was without the vac. advance hooked up.
Pulled the cap and inspected the weights. They were aftermarket ones, and as Lars says it's best to use the factory weights. The weights were very stiff and wouldn't allow full advance, not to mention that they would not return to the closed position. We replaced the weights with the factory ones (which worked smooth), then with the springs out we checked how much advance the dist. would allow with the installed bushings. We then played around with the springs to find some that would work. The advance now comes in at about 1400-1500 rpm, with full advance all in at about 2700 rpm. Total is set at 35 degrees without vac. advance. I adjusted the idle mixture screws to allow max vac. and idle speed. Then I adjusted the curb idle speed for about 750 rpm in drive.
No hesitation, no stumble, no drama.
It does need a stall and steeper gears to help it out of the hole, but it is plenty driveable as is. All in all a pretty good outcome.
Justin, remember my number when and if you need help with your project.
Later,
Jeff
Le Mans Master
Joined: Apr 2006
Posts: 5,403
Likes: 95
Originally Posted by 406shark
Justin...
Glad to hear you are happy with the results. Once you get some gears and a decent stall in there it will scream.
The problem with the car...
There were a couple of the rockers that needed adjustment. The carb was not on the idle circut. The timing was jumping all over the place. One minute it would be at 8 BTDC, then it would be 12 BTDC. It had a total advance of only 25 BTDC. All timing was without the vac. advance hooked up.
Pulled the cap and inspected the weights. They were aftermarket ones, and as Lars says it's best to use the factory weights. The weights were very stiff and wouldn't allow full advance, not to mention that they would not return to the closed position. We replaced the weights with the factory ones (which worked smooth), then with the springs out we checked how much advance the dist. would allow with the installed bushings. We then played around with the springs to find some that would work. The advance now comes in at about 1400-1500 rpm, with full advance all in at about 2700 rpm. Total is set at 35 degrees without vac. advance. I adjusted the idle mixture screws to allow max vac. and idle speed. Then I adjusted the curb idle speed for about 750 rpm in drive.
No hesitation, no stumble, no drama.
It does need a stall and steeper gears to help it out of the hole, but it is plenty driveable as is. All in all a pretty good outcome.
Justin, remember my number when and if you need help with your project.
Later,
Jeff
Glad to hear you are happy with the results. Once you get some gears and a decent stall in there it will scream.
The problem with the car...
There were a couple of the rockers that needed adjustment. The carb was not on the idle circut. The timing was jumping all over the place. One minute it would be at 8 BTDC, then it would be 12 BTDC. It had a total advance of only 25 BTDC. All timing was without the vac. advance hooked up.
Pulled the cap and inspected the weights. They were aftermarket ones, and as Lars says it's best to use the factory weights. The weights were very stiff and wouldn't allow full advance, not to mention that they would not return to the closed position. We replaced the weights with the factory ones (which worked smooth), then with the springs out we checked how much advance the dist. would allow with the installed bushings. We then played around with the springs to find some that would work. The advance now comes in at about 1400-1500 rpm, with full advance all in at about 2700 rpm. Total is set at 35 degrees without vac. advance. I adjusted the idle mixture screws to allow max vac. and idle speed. Then I adjusted the curb idle speed for about 750 rpm in drive.
No hesitation, no stumble, no drama.
It does need a stall and steeper gears to help it out of the hole, but it is plenty driveable as is. All in all a pretty good outcome.
Justin, remember my number when and if you need help with your project.
Later,
Jeff
Instructor
Joined: Jul 2004
Posts: 245
Likes: 0
Originally Posted by Little Mouse
Great work sounds like most of his problem was in the dist.
I always look first at the dist. and timing events. Justin has tackled alot for someone his age. Hell, it's alot for most people. I'm impressed with his ambition and drive. I figure if he puts himself into his career half as much as his Vette he is going to be a very successfull person.
Later,
Jeff