?? About Gearing for a 5.0 Mustang Stocker

Stock 5 point 0 · 07-05-2007, 04:37 PM

Quote:

Originally Posted by Evan Smith

I would not let the stock engine rev too far past 6,200 in bone stock trim. If so you will eventually float the valves and cause breakage. I recommend getting a set of new valve springs with something like 120-130 lbs. pressure on the seat. This will be a simple way to get you a few extra rpm. Use either 4.30s with a 28-inch tall tire or 4.56s with a 30-inch tire.

About 12 years ago I ran 12.74/105 with a bone stock 5.0 in Stocker trim. That was with a T5 manual transmission. I'd go with 1 1/2-inch headers, not 1 5/8.

Evan

What was the index when you went 12.74 and how heavy was the car ?

Robbie Welch · 07-05-2007, 10:14 PM

I'll be using the stock block and the correct heads for the class but I'll be using aftermarket rods and pistons. Evan has a lot of experience with Mustangs, he'd be a good source for info.

Dennis Paz · 07-05-2007, 10:58 PM

I have a chance at driving an 87 mustang auto at the autolite nats. Does anyone have a clue what these things weigh?

Evan Smith · 07-06-2007, 07:59 AM

I think the index was 13.0 and I don't remember what the car weighed.

Paz, depending on the body style (coupe, LX hatch, LX conv., GT, GT conv.) that a V8 225-hp car can run anywhere from H/FI-F/FI.

Also, Bret is correct about running as much gear as you can, as long as you have the motor to pull the gear. There is no sense turning 6,500-6,800, when the stock cam and valvetrain is done at 5,800. The rev range for a bone stock 5.0 should be between 4,200-5,800, with the engine revving to about 6,200 in the traps. With better valve springs and a Stocker cam you can take this higher.

Evan

BRETV · 07-06-2007, 10:16 AM

I called mine an 87 and it had to weigh 3180 with me in the car in G/FIA. That's 14.00 x 215= 3010 + 170 driver.

Bret Velde
3028 A/FI Cobra

Dennis Paz · 07-06-2007, 09:24 PM

My friends car is a 100,000 miler stocker with only a few external mods , it has low gears and a 4500 converter. It will run right at the index on a good day. How much improvement would a cam make? any other suggestions? I dont want to show up at a national and be a tenth slow!

Lee Valentine · 07-10-2007, 05:44 PM

Dennis, I would pull the pan and check or replace bearings and the oil pump, use a standard oil pump no high pressure or high volume. Put in a blueprint cam good valve springs a 4500 converter and 5.13 gears. you will be surprized how fast it will go. Lee Valentine Call me at 203-775-6830 est between 6to9 pm and I'll help you out.

07-05-2007, 10:14 PM	#2
Robbie Welch Live Reporter Join Date: Sep 2005 Location: Golden Beach Maryland Posts: 1,234 Likes: 55 Liked 262 Times in 124 Posts	Re: ?? About Gearing for a 5.0 Mustang Stocker I'll be using the stock block and the correct heads for the class but I'll be using aftermarket rods and pistons. Evan has a lot of experience with Mustangs, he'd be a good source for info.

07-05-2007, 10:58 PM	#3
Dennis Paz Junior Member Join Date: Apr 2005 Location: stockton ca Posts: 97 Likes: 0 Liked 5 Times in 3 Posts	Re: ?? About Gearing for a 5.0 Mustang Stocker I have a chance at driving an 87 mustang auto at the autolite nats. Does anyone have a clue what these things weigh?

07-06-2007, 07:59 AM	#4
Evan Smith Member Join Date: Nov 2001 Location: Tampa Posts: 400 Likes: 7 Liked 115 Times in 5 Posts	Re: ?? About Gearing for a 5.0 Mustang Stocker I think the index was 13.0 and I don't remember what the car weighed. Paz, depending on the body style (coupe, LX hatch, LX conv., GT, GT conv.) that a V8 225-hp car can run anywhere from H/FI-F/FI. Also, Bret is correct about running as much gear as you can, as long as you have the motor to pull the gear. There is no sense turning 6,500-6,800, when the stock cam and valvetrain is done at 5,800. The rev range for a bone stock 5.0 should be between 4,200-5,800, with the engine revving to about 6,200 in the traps. With better valve springs and a Stocker cam you can take this higher. Evan __________________ Evan Smith 1798 STK Last edited by Evan Smith; 07-06-2007 at 08:03 AM.

07-06-2007, 10:16 AM	#5
BRETV Senior Member Join Date: Oct 2003 Posts: 568 Likes: 4,257 Liked 776 Times in 199 Posts	Re: ?? About Gearing for a 5.0 Mustang Stocker I called mine an 87 and it had to weigh 3180 with me in the car in G/FIA. That's 14.00 x 215= 3010 + 170 driver. Bret Velde 3028 A/FI Cobra

07-06-2007, 09:24 PM	#6
Dennis Paz Junior Member Join Date: Apr 2005 Location: stockton ca Posts: 97 Likes: 0 Liked 5 Times in 3 Posts	Re: ?? About Gearing for a 5.0 Mustang Stocker My friends car is a 100,000 miler stocker with only a few external mods , it has low gears and a 4500 converter. It will run right at the index on a good day. How much improvement would a cam make? any other suggestions? I dont want to show up at a national and be a tenth slow!

07-10-2007, 05:44 PM	#7
Lee Valentine Senior Member Join Date: May 2004 Location: Brookfield, CT Posts: 708 Likes: 13 Liked 319 Times in 68 Posts	Re: ?? About Gearing for a 5.0 Mustang Stocker Dennis, I would pull the pan and check or replace bearings and the oil pump, use a standard oil pump no high pressure or high volume. Put in a blueprint cam good valve springs a 4500 converter and 5.13 gears. you will be surprized how fast it will go. Lee Valentine Call me at 203-775-6830 est between 6to9 pm and I'll help you out.