Geoff ....chop Top Drag Swing Axel ? What Year

[Billyisgr8]

so what year  swing axel did you put into the chop top?

I'm trying to figure out what i want to do, stay swing or put in an irs conversion, I have 2 SSC trannies with a 4:12 and a 3:88 , and a irs pan half and the garbage swing in the car.

Depending on the year, can I put in the parts from the SSC into the swing for a beefier tranny? or is it worth it to switch to irs?

Drag only car is all it is going to be.  Max 220-240 hp once the motor is done.  Only 120-140hp  for the first year though.

What would you do,  keep it swing?

Kevin

 

[Geoff]

I would go swing as CV's are the week link. You can beef up the IRS so it is strong but since you have the swing pan go that route.
As for whats in the car i think it's a core 4;12 but am not sure.

yes you can take the internals from a ssc and instal them in a 71-2 swing or irs to make a stronger trans (using the 9tooth 1st and splined gears with a 3;88 r&p).

Call me at the shop and we can go over it.

[Bruce]

They each have their benefits and weak points.  

Swing:

Easy to make strong, just buy some axles and you're done.
swing axle rear susp is lighter than IRS.
There's more guys around that know how to make it work.

IRS:  

Can be made just as bulletproof, just takes more parts.  Drive flanges, CV joints, axles and outer stubs must be upgraded for 200+hp.  Since there are more parts, the cost is higher, but not as bad as people think.  Check out:

http://www.nevadaoffroadbuggy.com/item.asp...thly%20Specials

Here are the 930 Turbo CV joints for $52 ea.

IRS does not suffer the severe camber changes that swing axle does.  Typically the swing cars are set up with very little rear susp travel to limit the camber change which adversly affects the tire contact patch.  Having little susp travel means you are more suseptable to problems on the launch.  It also applies a greater shock to the transmission's internal components.  If you had IRS, you can set it up for much more susp travel, which will apply the load more gradually to the trans parts.

Check out this topic on STF if you haven't already seen it:

http://www.shoptalkforums.com/viewtopic.php?t=60718