I inslatted an E-series on my Raptor this weekend. I like the sort-of reasonable noise levels and gains attained with the pipe. The installation was difficult since the muffler did'nt wanna mate with the mid-pipe very well....but not excessive.
I am running a Dyno-jet kit with 146-148 mains with the needles in the Dyno-jet prescribed location. My question is has anyone altered the needle setting for more possible gains? I will mess with it anyways......just wanna see if anyone has had success and which way they went. THanks!!

 

I also have a E-series slip-on. Did you reuse the copper gasket from the stock silence? It help the two match up perfectly. Im also using a dynojet kit. With no problems. Running a main jets dj144,& dj146 + needles at the second position from the top.

 

<< stock needles are best with stock carbs no matter what your mods are to the engine except turbo >>

At one point, I would have agreed %100 with you. After dialing in my top end, my mid range was horribly rich....to the point where I reluctantly purchased a Dyno-jet kit. This kit cleaned up my mid range.....possibly the best money I have spent on my Raptor.
Looks like you have plenty invested in your engine.....whats another $60-70 bucks? Trust me....get the Dyno-jet kit and thank me later.

 

garyc660R,
My son just turned 16 the other day and he is all ready saying trust me about driving the Z/28.

Chet [img]i/expressions/face-icon-small-shocked.gif[/img]

 

haha....point well taken Chet. Do you have a dyno-jet kit yet? Changed the muffler yet? How is the weather at the range today?

 

garyc660R,

We just don't have to many spare dyno-jet motors, so I haven't made the retrofit to the Raptor just yet.

The muffler is stock with a heat absorbing after chamber to catch the heat that is given off. I just don't want the Strategic ABM interceptor missiles to lock onto me when I am riding down the beach.

Current temp : 86 degrees, Partly cloudy, Radar is showing showers off to the East. Light winds approx. 12 mph

 

So no-one else has an E-series on their Raptor? Come on guys and post your comments......how many disks are you running? How did going up in disks affect your jetting and power delivery? Thanks guys.

 

rraptor13....what led you to having to adjust your needles?

 

gary660r how do you know how rich you are in the mid range? I think I am but I don't know how to tell. Please tell me the secret!

 

I have a e-series pipe on my raptor and I ran 155 160 yamaha jets with the needle set on the second clip from the top. I also run a pro design air filter with three 2 inch holes drilled in my air box lid. This worked very well with mine. I also live in maine and am very close to sea level. as far as how many disks to run I run 12, that works the best for me..however I have had as many as 18 in it and just made it louder! hope this helps.