here's a question.
does the vx 18 come with a purple AND/ OR a blue cooling head?
every vx that i've seen has a purple cooling head. my vx has a blue cooling head.
every sh that i've seen has a blue cooling head.

also, what mods do you have to do to the throttle linkage to go from the vx rotary carb to the sh, since the sh has the slide carb?
can you buy the linkage to go to the slide carb instead of modifying the rotary carb linkage?

you can get the SH18 with a rotary carb - that's what mine has

[link=http://www.shengines.com/TECHDATA_PT18S01A.htm]http://www.shengines.com/TECHDATA_PT18S01A.htm[/link]

IF you switch from the rotory to the slide carb you will have to buy some extra linkage and construct your own linkage modification. If you want I can take some picks of the linkage I made for my Taipan when I put an STS Dragon 12R in it. But you can get the SH in a rotory carb so you don't have to do the mod. We have it in rotory or Slide.

Also the VX engine comes with either a blue or purple cooling head. We only sell the one with the purple head, because there "in my opinion" is a problem with the blue cooling heads and the factory glow plugs that are being used on the blue cooling heads, they don't seem to run as well as the ones with the purple heads.

hmm, my vx with the blue head runs great and it has plenty of power.
i have only had to tune it a couple of times, and it seems to stay in tune now.
i can pretty much fuel it up, pull it once or twice and it's running...and running great.
but now i am wondering about your thoughts on the "problem" with the blue heads.
i'm not running the factory glow plug i have switched to an os A3 plug and it works good for me.

that's good to hear. I just know that every other one we've sold with the blue head has some sort of engine problem right out of the box. unless they fixed whatever was wrong.

i have no idea, i have never had any real problems with mine other than getting it tuned and running for the break in. getting it started for the first time was a challenge, but that has to do with carb tuning and all that.

Redcat has the rotary too, ive pick one up from redcat with the rotary a while back. And ya the sh comes with blue heads always, but the vx's come in purple and blue.

A while back joey switched from the vx 16 to the sh 18, ya there is a difference between the 16 and the 18, but he said it was a HUGE improvement. Im not sure how much .02cc's will make, but like i said from the vx16 to the sh18 was huge.

i bent one of my fins on my cooling head and i was wondering if i have to but a new cooling head

Naw, unless you break the cooling head in half you're fine.

i just noticed something. i was looking around e-bay and i found an older used volcano sv. it says that it has only been ran twice, but the engine needs a new piston and sleeve. looking at the cooling head (it's a vx-18 with the blue head) it appears to be really short, like there is very little space between the fins. the stock air filter housing is taller than the cooling head. i swear that i only counted 6 cooling fins on that head. (unless i mis-counted)
maybe this is one of the heads that you are talking about wade?
the head on my vx is taller than the air filter housing, and there appears to be alot more space between the fins..plus my head has 8 cooling fins.
maybe my eyes are playing tricks on me, after all i'm looking at a pic. and sometimes it's hard to get the full perspective from looking at a picture.

There is always redcats for super cheap on my local craigslist. There was a volcano less than a week ago that was like 75 bucks i think. But i never need anymore, or so my girlfriend says haha.

i got my tornado bb for $50 off of craigs list