I've also had some "experience" with my Integy Savage shocks. I picked up the MSR4 ver2(3.5mm shafts) a couple months ago and wrote up a little review on em on another forum I'm on...
I immediately noticed how thick the shafts were! My buddy and I calipered a stock 3mm shaft and the Integy shaft and sure enough, they're bigger. Here's a pic of the stock shaft and the 3.5mm Integy shaft...
Here's the measurement of a stock shaft in a Hot Bodies shock that I took off of the truck...
And here's the measurement of the Integy...
So I do as they say and put 20 wt oil in them (against my better judgement). It seemed very,very soft. Very little dampening with that thin oil. So I take her out for a test run. Make a few laps and jumps and take a few tumbles. Nothing out of the ordinary. Actually very tame compared to usual. Come around the corner and I notice my rear end sagging. Bring her in and sure enough, BENT SHAFT! Now I'm pissed, but I put one of the few Hot Bodies I had that still had a straight shaft to at least finish out the tank of fuel. Make a few more lamps and jumps around the track. Come around the turn and notice my front end is dragging. Yep, ANOTHER BENT $#@%ING SHAFT! I took it and just put it up for the day after that. I just E-Mailed Integy earlier to see what they will do about it. I'm waiting for a response from them on it now. Hopefully they will stand behind these and replace these shafts and possibly give me an idea of what could prevent this I'm thinking this 20wt oil is definately not the way to go for one
Here's what they look like now...
After that, I emailed Integy support for assistance. They sent me back an email pretty quickly and were no problem to get replacements from. This was their email to me...
Thank you for your e-mail inquiry. Please check to see if you have the 3.0mm or the 3.5mm shafts, let us know that and your mailing address...we'll send you a different set of shock shaft (harder ones). There are several other things you might want to check to ensure trouble free operation.
Please make sure that you're using light weight shock oil. (Ex. 15 or 20 weight shock oil) Also, check to see if the shocks have too much oil...if the shock shaft cannot go all the way into the shock body or if the shafts rebound, the shocks have too much oil and you can bleed the shocks by opening their caps to allow some oil to come out. There should be a foam insert inside each of the piggyback reservoir.
If you are landing big jumps, try using a harder spring set. This allow the springs to absorb more of the truck's weight during landing rather than relying of the shock's damping alone. If you want to run a harder spring set, you can use the Purple Savage Spring along with the stock Savage plastic rod ends and Spring Retainers. If the shock shafts still bend on your truck, it's possible to use the original HPI shock shafts from the plastic Savage shocks. Some racers like the original HPI stainless steel shock shafts better.
If you're using the stock plastic shock tower, please check to make sure that the piggybacks clear the plastic shock tower. You might need to remove small amount of plastic from the shock tower in order for the piggyback to move freely. If you're using our alloy shock tower, it's not an issue.
Best Regards,
Tech Support
About a week later, I received the set of shafts and verious aother orings, washers, etc.
So then, after I got the parts, I decided I'd give them a little overhaul before reinstalling and running tham...
First thing was to empty that rediculously light 20wt oil that Integy recommends. As I was doing so I realized that not only did I have the 2 severely bent shaft, at least 4 of them were bent to some extent Luckily they sent me the entire set of 8 "HD" shafts. Also, I noticed that some of the pistons weren't even attached to the shafts anymore because the e clips had come off and been crushed! So I reinstall all the pistons with new e clips onto the new shafts. Also replaced the orings in the two that were bent at 90 degrees. Then I placed a small fuel line limiter onto the shafts to stop them from extending so far. About 3/8 inch long or so. You can really tell the difference in the amount of slop in the shafts when fully extended now. Here's a pic of the fueline on a shaft..
I then installed all of the shafts with limiters back in the bodies and filled with 35wt oil. Put some limiters on the shafts outside of the shock body to prevent any bottoming out, stuck on the light green, stiffest set from the Integy sping kit and was all done. Now they actually feel like shocks again instead of just some water filled springs Hopefully this will stop the shaft bending problems. I'll put 'em through a good test on our track this weekend and let you guys know what happened. Here's a few pics of 'em installed on the Savage. Also figured I'd buy her something nice to try and convince her to act right so I picked up an American CNC head for the Picco too