4 speed vs. 5 speed for stocker

EdgarTurbo · 05-19-2010, 08:53 PM

Hello guys,

I'm building a 03 mustang mach-1 and i was wondering what are your thoughts on what will be the best choice for my application or any thought at all. I'm undecided on what will be a good choice for me. In the rulesbook said that O.D. gear is not required but at the same time said that the car have to have the same number of foward speeds as original, that's kind of confusing, But anyway if I got the option what will be your choice. Any thoughts will be greatly appreciated. Thanks in advance!

Edgar

Chad Rhodes · 05-19-2010, 09:21 PM

considering you won't find a clutch assisted 5 spd jerico or g-force. I'd say a 4spd

Stephen & Horace Johnson · 05-19-2010, 10:38 PM

Quote:

Originally Posted by EdgarTurbo

Hello guys,

I'm building a 03 mustang mach-1 and i was wondering what are your thoughts on what will be the best choice for my application or any thought at all. I'm undecided on what will be a good choice for me. In the rulesbook said that O.D. gear is not required but at the same time said that the car have to have the same number of foward speeds as original, that's kind of confusing, But anyway if I got the option what will be your choice. Any thoughts will be greatly appreciated. Thanks in advance!

Edgar

get a 5speed, call Jerico or g-force, i'm quite sure either one of those companys will have some used ones or a new one if thats what you're looking for.

Jeff Lee · 05-19-2010, 10:53 PM

5-speed will be worth nearly two tenths over a 4-speed with that small engine.

You are allowed to run either a 4-speed or 5-speed with your application in S/SS

EdgarTurbo · 05-19-2010, 11:24 PM

Thanks, Jeff for the input, that is somthing to consider...

Ed Carpenter · 05-20-2010, 02:38 AM

No one mentioned yet that a 5 speed will cost you about 2000.00 more!!!! Just a small detail.

Mike Taylor 3601 · 05-20-2010, 06:34 AM

Liberty sells there doug nash style for about 4500.00 now with face plate dogs,Jerico,G- Force also have clutch assisted 5 speeds.There are still some good original Nashes out there that can be bought for good price used is ok as long as it's not used up.
Mike Taylor 3601

Dave Casey · 05-20-2010, 07:34 AM

I have used both in my 305 chev g/s car.(current record holder) I prefer the 4 speed. The 5 speed "MAY" be a couple of hundreths faster when all scienced out, but it is (a)not as consistant, (b)more money, and (c)the 4 speed jerico is so reliable that you just can't beat it. The motors that you and i have are not high winding modified motors, they have good lower end power considering their size.

Jeff Swanson · 05-20-2010, 10:12 AM

Quote:

Originally Posted by Chad Rhodes

considering you won't find a clutch assisted 5 spd jerico or g-force. I'd say a 4spd

That's incorrect....

The only thing better than a 5spd is a 6spd, but cost is definitely a factor.

Jeff Lee · 05-20-2010, 11:35 AM

All I know is the late Bob Pott (K/S & L/S 5.0 Mustang); now driven by his daughter Kelly Pott-Hall) switched from a 4-speed Jerico to a 5-Speed. He was told by "all the experts" the cost difference of a 5-speed wouldn't make any noticeable difference, so that's what he ran for all those years.
Then he made the switch. With no other changes he picked up two tenths.
I'm under the impression the less the torque and the less the RPM capability of the engine, the more of an advantage a 5-speed has over a 4-speed.
And if there was a difference of $5K between the two offerings and I thought I could get two tenths without any other changes, I think it is money well spent.

I'd also highly recommend the Sportsman dual 7" clutch assembly. The idea here is to keep the weight as central to the crank centerline as possible. Again, I think small engines really need this. PM me if you need more info.

By the way, I think an '03 MACH 1 would be a really fun stocker! What class does it fit?

05-19-2010, 08:53 PM	#1
EdgarTurbo Junior Member Join Date: Sep 2009 Posts: 25 Likes: 0 Liked 0 Times in 0 Posts	4 speed vs. 5 speed for stocker Hello guys, I'm building a 03 mustang mach-1 and i was wondering what are your thoughts on what will be the best choice for my application or any thought at all. I'm undecided on what will be a good choice for me. In the rulesbook said that O.D. gear is not required but at the same time said that the car have to have the same number of foward speeds as original, that's kind of confusing, But anyway if I got the option what will be your choice. Any thoughts will be greatly appreciated. Thanks in advance! Edgar

05-19-2010, 09:21 PM	#2
Chad Rhodes VIP Member Join Date: Jan 2005 Location: Where the Green Grass Grows, AL Posts: 2,375 Likes: 0 Liked 3 Times in 3 Posts	Re: 4 speed vs. 5 speed for stocker considering you won't find a clutch assisted 5 spd jerico or g-force. I'd say a 4spd __________________ Chad Rhodes 2113 I/SA

05-19-2010, 10:53 PM	#4
Jeff Lee VIP Member Join Date: Jul 2007 Location: Anthem, Arizona Posts: 2,766 Likes: 0 Liked 3 Times in 3 Posts	Re: 4 speed vs. 5 speed for stocker 5-speed will be worth nearly two tenths over a 4-speed with that small engine. You are allowed to run either a 4-speed or 5-speed with your application in S/SS __________________ Jeff Lee 7494 D/S '70 AMX

05-19-2010, 11:24 PM	#5
EdgarTurbo Junior Member Join Date: Sep 2009 Posts: 25 Likes: 0 Liked 0 Times in 0 Posts	Re: 4 speed vs. 5 speed for stocker Thanks, Jeff for the input, that is somthing to consider...

05-20-2010, 02:38 AM	#6
Ed Carpenter Live Reporter Join Date: May 2006 Location: Dripping Springs, Tx Posts: 2,709 Likes: 186 Liked 520 Times in 132 Posts	Re: 4 speed vs. 5 speed for stocker No one mentioned yet that a 5 speed will cost you about 2000.00 more!!!! Just a small detail. __________________ Ed Carpenter 2005 Chevy Cobalt A/SM Race Engine Development

05-20-2010, 06:34 AM	#7
Mike Taylor 3601 VIP Member Join Date: Oct 2008 Location: Somerset,Ky Posts: 1,362 Likes: 336 Liked 279 Times in 96 Posts	Re: 4 speed vs. 5 speed for stocker Liberty sells there doug nash style for about 4500.00 now with face plate dogs,Jerico,G- Force also have clutch assisted 5 speeds.There are still some good original Nashes out there that can be bought for good price used is ok as long as it's not used up. Mike Taylor 3601

05-20-2010, 07:34 AM	#8
Dave Casey VIP Member Join Date: Dec 2002 Location: Hampden, MA Posts: 1,198 Likes: 233 Liked 769 Times in 162 Posts	Re: 4 speed vs. 5 speed for stocker I have used both in my 305 chev g/s car.(current record holder) I prefer the 4 speed. The 5 speed "MAY" be a couple of hundreths faster when all scienced out, but it is (a)not as consistant, (b)more money, and (c)the 4 speed jerico is so reliable that you just can't beat it. The motors that you and i have are not high winding modified motors, they have good lower end power considering their size. __________________ Dave Casey 1330 STK

05-20-2010, 11:35 AM	#10
Jeff Lee VIP Member Join Date: Jul 2007 Location: Anthem, Arizona Posts: 2,766 Likes: 0 Liked 3 Times in 3 Posts	Re: 4 speed vs. 5 speed for stocker All I know is the late Bob Pott (K/S & L/S 5.0 Mustang); now driven by his daughter Kelly Pott-Hall) switched from a 4-speed Jerico to a 5-Speed. He was told by "all the experts" the cost difference of a 5-speed wouldn't make any noticeable difference, so that's what he ran for all those years. Then he made the switch. With no other changes he picked up two tenths. I'm under the impression the less the torque and the less the RPM capability of the engine, the more of an advantage a 5-speed has over a 4-speed. And if there was a difference of $5K between the two offerings and I thought I could get two tenths without any other changes, I think it is money well spent. I'd also highly recommend the Sportsman dual 7" clutch assembly. The idea here is to keep the weight as central to the crank centerline as possible. Again, I think small engines really need this. PM me if you need more info. By the way, I think an '03 MACH 1 would be a really fun stocker! What class does it fit? __________________ Jeff Lee 7494 D/S '70 AMX