Steel/Bronze wool

[nakedape]

I'm getting into a repack of my M4 Ti system. They sent me a sleeve, rivets and fibre packing material. What wasn't mentioned was the steel wool wrap that is the first layer on the core. It was all trashed, and the material was blown out about halfway up the muffler.:|

There are a lot of products out there, but nothing so far that looks like what I found. Something similar? I have the weekend to figure it out but would prefer not to order stuff. Hoping to tame the noise a little. Judging from what I saw in there this should help. Looking for a baseline dyno output too, after jetting changes. Thanks.

 

[afm199]

I just use the fiber. I've got some stainless steel wool lying around somewhere, got it on ebay. They burn out either way. Twins like the SV650 are super hard on M4 for some reason. The CF will hole out about 10 inches back from the inlet. The material starts going there first.

What carbs you running? Air filter? There are some great baselines Zoran did that cover a lot of ground and have a lot of dyno time in them.

 

[nakedape]

You were right about that Ernie. The blackened remains of the packing material started at the pipe inlet and continued halfway up the pipe. I ended up getting a Moose kit with a screen and some steel wool. After securing that to the perf pipe I fed the glass wool stuff M4 sent into the void. Didn't fill it all the way so I rolled a little of the moose matting up and stuffed the end. It was a bitch overall. I reused the skin by turning it around. Looks great, no logo.

I'm running stock carbs with 165 mains, 2.5 turns, 2 shims, drilled slide, open OEM filter. Dyno was super fat down low, but I found the idle screws had backed out a turn, or I goofed on the setup. 5K RPM (steady state commute rpm) was perfect A/F ratio. All the way to 9.5K I also did the TRE delete. HP: 71 All my tuning info came from the Aussie SV guy's site.

I was sorely tempted to RTV those pilot screw heads but didn't want to pick out a mess later. I'm very pleased with the running condition. The plugs read a little milk chocolate, but the dyno doesn't lie. It's really close and spot on WFO.

 

[afm199]

I certainly wouldn't go richer on those mains. That's richer than I run, but the dyno is certainly a good way to find out.

 

[nakedape]

I was thinking about 155 mains. But I wonder if that will help with the only annoying issue I have: 33mpg What are you running with the full system?

Here's the first dyno run. I changed the pilot screws settings to try to lean out the bottom. Need another run. But this is with 165/167.5 mains

 

[afm199]

I was thinking about 155 mains. But I wonder if that will help with the only annoying issue I have: 33mpg What are you running with the full system?

Here's the first dyno run. I changed the pilot screws settings to try to lean out the bottom. Need another run. But this is with 165/167.5 mains

I get crap mileage on any of my SV's, they're all built motors and big mains.

Full system stock carbs/aftermarket filter with big mouth and full system exhaust, I think they're 150ish, Flatslides are 160ish. The Sv seems to handle a wide range of main size without much difficulty.

 

[nakedape]

Good to know. Now that I get into the carbs in under 20 minutes I'll play around with mains. BMC? I'm running a used OEM filter and it's time to replace.