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Migit
Banned
Joined: July 09, 2004
Posts: 831
Location: Central Illinois
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 Posted: Fri Jul 15, 2005 7:41 pm Post subject: Swing axle or IRS for a street/strip car? |
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| OK, I am thinking about building a street/strip car and am iffy about what tranny setup to use. Alot of people use swingaxle cars to build their strip cars but most streetable cars are IRS. I was just wondering what the pro's and cons of both would be? This car is going to see the street alot and MPG isn't a big thing for me. Any input would be great. |
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Tkisner
Samba Member
Joined: May 15, 2004
Posts: 275
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| Posted: Fri Jul 15, 2005 7:45 pm Post subject: |
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| I say if you have the money go IRS if your cheap go S/A. THe only real reason to stay away from IRS is the cost. |
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Glenn 
Mr. 010
Joined: December 25, 2001
Posts: 80102
Location: Sneaking up behind you
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| Posted: Fri Jul 15, 2005 7:52 pm Post subject: |
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IRS with "Thing" flanges and stub axles, Type 2 CVs and Say-A-Way axles are plenty strong.
That's what I have... full steel car 1650lbs and runs high 12s.
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Glenn
74 Beetle Specs | 74 Beetle Restoration | 2180cc Engine
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Migit
Banned
Joined: July 09, 2004
Posts: 831
Location: Central Illinois
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| Posted: Fri Jul 15, 2005 8:20 pm Post subject: |
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| This is exactly what I am looking for. You always hear listen to your parents, well my Dad said IRS too lol. Now to find a good pre 66 body and a post 68 pan. Anyone know of a good website that goes step by step for a flip frontend? |
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danimal
Banned
Joined: April 05, 2004
Posts: 587
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| Posted: Sat Jul 16, 2005 10:33 am Post subject: |
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| Tkisner wrote: |
| THe only real reason to stay away from IRS is the cost. |
umm, no... some people go s/a because it's lighter... i've heard maybe a 40 lb difference?
but irs gets my vote!
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oicdn
Samba Member
Joined: April 30, 2005
Posts: 279
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| Posted: Sat Jul 16, 2005 1:12 pm Post subject: |
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Supposedly the Swing axle trannies are better for drag racing.....beefier I guess....
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jbbugs
Samba Member
Joined: September 16, 2002
Posts: 2191
Location: Behind the wheel
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| Posted: Sun Jul 17, 2005 9:16 am Post subject: |
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Here's another reason NOT to use IRS trans for dragracing.Thing output flanges are still connected to these end gears.Out of the two parts,what's going to break? ERCO sells some stronger endgears,but they are almost always out of stock,and will cost you a pretty good amount to upgrade to the larger flanges,CV's and stubaxles.If you're going with a swingaxle,you won't be breaking any of these.Paul
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danimal
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Joined: April 05, 2004
Posts: 587
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| Posted: Sun Jul 17, 2005 10:46 am Post subject: |
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i can play the fud-mongering game as well  take a look at this swing-axle ghia, it's has a super heavy duty s/a setup that mike found the weak spot on:
http://home.comcast.net/~mlawless29/100_0367.MOV
i don't think that you are going to have a wheel break off like that on an irs car.
btw, the current pro mod record is an 8.99, and it's NOT a swing axle car.
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Glenn
Mr. 010
Joined: December 25, 2001
Posts: 80102
Location: Sneaking up behind you
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| Posted: Sun Jul 17, 2005 10:52 am Post subject: |
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| danimal wrote: |
| btw, the current pro mod record is an 8.99, and it's NOT a swing axle car. |
I'd sure assume it has the Dave Folts setup, so were not talking IRS in the "conventional" sense.
Apples to bowling balls 
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Glenn
74 Beetle Specs | 74 Beetle Restoration | 2180cc Engine
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danimal
Banned
Joined: April 05, 2004
Posts: 587
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| Posted: Sun Jul 17, 2005 11:41 am Post subject: |
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| Glenn wrote: |
| danimal wrote: |
| btw, the current pro mod record is an 8.99, and it's NOT a swing axle car. |
I'd sure assume it has the Dave Folts setup, so were not talking IRS in the "conventional" sense.
Apples to bowling balls |
i believe that the dave folts setup is for swing axle only, NOT irs.
has it been awhile since you threw a strike?
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Migit
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Joined: July 09, 2004
Posts: 831
Location: Central Illinois
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| Posted: Mon Jul 18, 2005 3:37 pm Post subject: |
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Well I just picked up a 65 bug ( for free  ) with almost no rust, so it's a swing axle for me. I'll post picks soon, it's got wild late 60's graphics painted on it. Time to start looking for speed parts now  |
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