Have you ever broken anything during a launch?

[thor'svr4]

I did a quick search on this forum and didn’t see any thread that discussed the breaking point of drivetrain components so I figured I would start a thread on it. It might be a good idea to get together a ‘list’ of what people break at what hp/tq. This information would defiantly be useful for anyone whose new to the 3000gt / stealth platform.

So like the title says, post up your experiences. Good or bad. If you have broken a part let us know what you broke. How much hp/tq? What rpm did you launch at? Ect. But equally as important as knowing what parts will break is what parts will hold. Let us know about any parts that have surprised you.

My contribution:
418/408 awhp/tq
Solid motor mounts
Stock OEM clutch, stock flywheel, stock 25 spline t-case with maximal ‘old style K’ brace.
~7000rpm launch on brand new Kumho Ecsta MX 245s deflated to ~20psi at the track.

The only issue I’ve ever had was this thing



I heard a weird noise right after the launch and I initially thought I had broken something in the trans and when I pulled the trans apart I saw that this part was purple and 4 of the 6 gears in it were seized. (turned out the noise was a spun #6 rod bearing) The car drove perfectly fine on the way home from the track. To be honest I’m not sure if I killed the part with all the launches or if the part had been seized ever since I bought the car. When I bought the car it had no oil in the trans, t-case or rear end. It is interesting to note that it was the cars first drive with Pennzoil synchromesh in the trans.

Other than that I’ve never had a single issue. So far I’ve done a few hundred street launches and ~8 launches at the track on the stock drive-train.

From my personal experience (which is obviously limited to my vr4) I would say a stock first gen 25 spline drive-train with Maximal Performance transfer case brace is plenty strong enough to hold low 400’s. I’ve got no idea how it would do on wider street tires, drag radials or slicks though.