Power Off the Line

tbar12 · 07-06-2005, 01:39 PM

I have a 66’ Mustang with a 351 Cleveland 4 bolt main engine and an Edelbrock 750 carb. It has the original C4 automatic transmission and a new drive train. Everything works and runs well and the transmission does not slip at all. However, when I am at a stop and transmission is in Drive, the tires don’t spin when I jump on the accelerator. It gradually builds speed and I get the “pull” in roughly third gear. What I would like is to have the “pull” off the line.

Are there adjustments I can make?

I am installing a shifter kit this weekend hoping the modulator replacement will help. I also do not know about the gear ratio in the back end. I don’t know if it is original or has been replaced. Any ideas to reach this performance would be helpful.

Thanks

Tony

rwhite65 · 07-07-2005, 05:27 AM

If you know what rpms you are cruising at around 55 mph on down the road, that could help us to give u a general guess on the gears you have. Chances are, if the car is sluggish out of the whole, the gears are probably stock.

Not to be overly simple here, but have you checked things like timing and the like? A cleaveland in the 66? Did they cut the shock towers to get that in there?
Ryan

tbar12 · 07-07-2005, 11:13 AM

Unfortunately, I don't know the rpms yet but I am guessing the gears are stock. I have checked the timing and engine is tight.

My father-in-law and I put the Cleveland in and fortunately did not have to cut the shock towers. The key was attaching the exhaust manifolds after the engine was in place. However, there is not much play between the manifolds and towers.

ralph s · 07-07-2005, 03:19 PM

shoehorn??? ya know i got to playn with the squirters,pump cams and got alot off the line. mabey some carb adjustments?

tbar12 · 07-07-2005, 03:42 PM

Shoehorn is a great analogy and right on the money! I purchased a new Edelbrock 750 carb and have not read enough to know if it needs to be adjusted or where to make my adjustments. Guess I have some homework to do!

davids · 07-07-2005, 06:18 PM

what cam, intake, compression ratio, headers, etc... all of these will have an impact on out of the hole performance. Lower gearing is the single biggest improvement that can be made for off the line acceleration. your engine pulling in third gear sounds like it has good top end and when you take off you may be below the power band of the motor.
Just some food for thought!

07-06-2005, 01:39 PM	#1
tbar12 Registered Member Join Date: Jul 2005 Posts: 5	Power Off the Line I have a 66’ Mustang with a 351 Cleveland 4 bolt main engine and an Edelbrock 750 carb. It has the original C4 automatic transmission and a new drive train. Everything works and runs well and the transmission does not slip at all. However, when I am at a stop and transmission is in Drive, the tires don’t spin when I jump on the accelerator. It gradually builds speed and I get the “pull” in roughly third gear. What I would like is to have the “pull” off the line. Are there adjustments I can make? I am installing a shifter kit this weekend hoping the modulator replacement will help. I also do not know about the gear ratio in the back end. I don’t know if it is original or has been replaced. Any ideas to reach this performance would be helpful. Thanks Tony

07-07-2005, 05:27 AM	#2
rwhite65 Ride Hard Join Date: Oct 2000 Location: Wyoming IL Posts: 1,094	Re: Power Off the Line If you know what rpms you are cruising at around 55 mph on down the road, that could help us to give u a general guess on the gears you have. Chances are, if the car is sluggish out of the whole, the gears are probably stock. Not to be overly simple here, but have you checked things like timing and the like? A cleaveland in the 66? Did they cut the shock towers to get that in there? Ryan __________________ 65 Fastback 91 roller 306, H/C/I AOD-Bauman, PI Stallion, 4.10's and traction loc 04 Grand Cherokee Freedom Edition 79 Ford F-250 4x4 - Restored

07-07-2005, 11:13 AM	#3
tbar12 Registered Member Join Date: Jul 2005 Posts: 5	Re: Power Off the Line Unfortunately, I don't know the rpms yet but I am guessing the gears are stock. I have checked the timing and engine is tight. My father-in-law and I put the Cleveland in and fortunately did not have to cut the shock towers. The key was attaching the exhaust manifolds after the engine was in place. However, there is not much play between the manifolds and towers.

07-07-2005, 03:19 PM	#4
ralph s Registered Member Join Date: Oct 2004 Location: idaho falls id Posts: 51	Re: Power Off the Line shoehorn??? ya know i got to playn with the squirters,pump cams and got alot off the line. mabey some carb adjustments?

07-07-2005, 03:42 PM	#5
tbar12 Registered Member Join Date: Jul 2005 Posts: 5	Re: Power Off the Line Shoehorn is a great analogy and right on the money! I purchased a new Edelbrock 750 carb and have not read enough to know if it needs to be adjusted or where to make my adjustments. Guess I have some homework to do!

07-07-2005, 06:18 PM	#6
davids Registered Member Join Date: Jun 2005 Posts: 7	Re: Power Off the Line what cam, intake, compression ratio, headers, etc... all of these will have an impact on out of the hole performance. Lower gearing is the single biggest improvement that can be made for off the line acceleration. your engine pulling in third gear sounds like it has good top end and when you take off you may be below the power band of the motor. Just some food for thought!

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