Would a 4-spider be over kill for up to 350hp

[spadepro22]

Would a 4-spider be over kill for up to 350hp

 

[pauleyman]

Yup. Unless you like doing 6k clutch side steps. Not good for anything. There is no downside to a 4 spider except cost.

 

[spadepro22]

Yup. Unless you like doing 6k clutch side steps. Not good for anything. There is no downside to a 4 spider except cost.

Cool. Im tryin to get the right rebuild the 1st time around that will handle my setup. Most stage 1's are like 1grand and seems like they will do the job, but the next step ups is like 1350 - 1500. Im leaning toward the Jacks value 2.1. Shep stage 2 seems good but for a little more I could get the 4-spider from Jacks. Dam what to do? Ive been debating for about 2 weeks now.

 

[bastarddsm]

Well, its a ballance between you might break it, and you won't break it.

 

[dsmdeliveryboy]

I've seen a few break, but those were only on much higher hp cars. I can't see it being a downside it any way except for the cost of not really needing it..

 

[TSimage]

There is NO SUCH THING as "over kill" when adding strength to any part of a DSM. It is more referred to "Delaying the inevitable."

 

[riopgtmn]

Have you looked into TRE?

 

[spadepro22]

Have you looked into TRE?

I've tried, but they havent emailed me back.

 

[twicks69]

A 2-spider center diff with the torrington bearing mod done to the diff cover will be fine for your power levels. As well, the only way I would do a 4-spider would be with an upgraded chromoly tool steel cross shaft made for that specific job instead of the other guys that simply mill down the stock cross shaft to accomodate more gears as they don't surface treat it and it ends up failing down the road. In this case, you are fine with a simple $40 mod for machining the diff cover and bearing if your pinion gearset and cover are in good working condition. If your current cover and upper pinion gear is junk, weld the diff and keep it as a backup and purchase a replacement good used center diff for the modification. If your spider gear washer races on the case are thrust load worn, have it machined to accept two spider gear washers per spider gear as it will help with oiling and loading while providing a fresh thrust surface.

 

[GRNDSM]

It is more of a question of how you use your car. Every time you launch it, you risk breaking center diff. Usually, it doesn't become a problem until drop below 12.5's, but it can happen on slower cars, if their encounter wheelhop.

Another thing to keep in mind is that center diff failures are not always benign... Depending on how your spider gears fail, fragments could come out of the diff housing, make their way to the front diff area and that usually causes them to go through your tranny case!

I think that if you launch your car more than a couple of times a year, you should get the upgrade.

 

[twicks69]

It is more of a question of how you use your car. Every time you launch it, you risk breaking center diff. Usually, it doesn’t become a problem until drop below 12.5’s, but it can happen on slower cars, if their encounter wheelhop.

Another thing to keep in mind is that center diff failures are not always benign... Depending on how your spider gears fail, fragments could come out of the diff housing, make their way to the front diff area and that usually causes them to go through your tranny case!

I think that if you launch your car more than a couple of times a year, you should get the upgrade.

I also agree with this statement.

 

[laserspeeddemon]

This what I think. You are going to make 350AWHP. You'll be happy for about 6 months or so. Then you are going to get bit with the bug and are going to push for more power. Then you are going to get to around 400-500hp and kick yourself for not doing the 4-spider upgrade.

When I had my transmission rebuilt while making just under 400AWHP, I decided to go ahead and do the 4-spider upgrade. Now, I'm glad that I did, because I am hoping to break 500AWHP soon.

 

[spadepro22]

Guess Ill get the 4-spider.