JEXTEL

My Feedback: (1)

quick question will the CV-R .12 OS engine cooling head fit on the CV engine? I dont like that head very much but I need a new engine for the rest of the season....

Also with the CV i notice a little nut on the shaft???? my CV-R didnt have that the CVis a short shaft can I put it in my AD1???? what about that little nut do I just take it off? then assembly as if t was on my CV-R?

InfinitySpeed04

They are both of the same series. It should fit. I am not %100 sure but I think it will.

JEXTEL

My Feedback: (1)

I think so I check the carb product item num,bers and there the same but wat about the little nut?

ThunderbirdJunkie

My Feedback: (3)

i know for a 100% fact that it will indeed work..

now as for the short crank engine in your XXXNT, no.

jkulhanek

Really? Might be a good investment...

I have a highly modified .12 CV, this baby screams!! I calculated the max engine RPM's at 38,100 RPM.

I love this little motor...

jkulhanek

This looks good, might get one...

http://www2.towerhobbies.com/cgi-bin...?&I=LXD499&P=7

JEXTEL

My Feedback: (1)

Damn I bought it already but it fits in Rc10GT's????? its a stub crank..so this will work right what about that little nut what is that for..do I remove that then assemble the clutch as if it was my CV-R?

jkulhanek

The little nut just holds the drive hub on the shaft so it doesnt fall of the engine in the factory or when packed. It is not needed.

jkulhanek

OH MY GOD

http://www2.towerhobbies.com/cgi-bin...?&I=LXRJ61&P=7

JEXTEL

My Feedback: (1)

ok thanks now I can wait I got to switch out hte carb asnd head then Ill bolt on the fly and clutch stuff then drop her in my AD1...only thing I dont like is that pull start I guess it will be good when I run the 1/8(i have one starter box)

Thanks guys I just need an engine to finish this season and then for next im going to get the Fantom fr 12 for next season

The_Collector

Yes, they are bringing down the price on the O.S. machined heads. Grab one before they go back up. They are usually $50-70.

ThunderbirdJunkie

My Feedback: (3)

whoa holy crap, i didnt even look at the price.

i'm stockin up

jkulhanek

I already did

Can't wait to turn my ported .12 CV-X into a ported Hyper CV-X [:-]

jkulhanek

Off topic, anybody tried the duratrax ABC piston/sleeve set?

ThunderbirdJunkie

My Feedback: (3)

no, but i do have a .12CV that needs a rebuild

jkulhanek

Well at $19.99 it's looking abetter option than the O.S.
I don't doubt for a second the quality of the O.S....but am unsure about the duratrax...howabout you buy it, try it, tell me how it goes lol


Just wondering, you seem to have tried many more engines than me...how do you rate the CV overall?

The_Collector

Every O.S. I rebuild I use the Duratrax parts. They work great. More time is needed during break-in to do it right.

jkulhanek

Really? That's great, is there any difference in power between the duratrax and O.S.? Different porting?

And every O.S.? How many different parts does duratrax make for O.S.?

ThunderbirdJunkie

My Feedback: (3)

jk, in general Duratrax's aftermarket parts aren't second-rate like some folks would have you believe.

I was plannin on goin ahead and givin the duratrax piston/sleeve a shot, since i've got nothin to lose.

the CV line is a great series of engines, and they're just flat out porting ho's they love being ground down, but you GOTTA know what you're doing.

jkulhanek

TBJ, when you port your motors, what parts do you modify? I know "porting" usually refers to the cylinder ports....but what else do you do?

ThunderbirdJunkie

My Feedback: (3)

I honestly don't do much of anything MYSELF when porting...I have my dad do it (he's a two stroke madman), and only a couple of my engines are ported.

I have a buddy who builds MX engines, and I'm sending a couple motors his way fairly soon since they're gonna need new piston/sleeve sets.

46u

My Feedback: (3)

Crank shaft.

ThunderbirdJunkie

My Feedback: (3)

along with a little massaging of the case.

as far as SPECIFICS, though, i can't tell because i simply don't know.

jkulhanek

I've found it pretty simple to modify these engines, the only thing I haven't tried yet is altering the size of the ports. Smoothing the ports, yes...but the size of the ports remains standard...I think enlarging ports is where the power can be unlocked.

Heres a link to some work I did on my O.S. .12 CV-X

http://www.rcuniverse.com/forum/m_26...tm.htm#2697022

I've been running this baby on some 20% Nitro home brew, and the power is great! Max RPM is a smidgen over 38,000.

I agree that these CV's ARE porting HO's...

When my Hyper head arrives, i'll try some 35%N 15%O mix that I made....Can't wait!

JEXTEL

My Feedback: (1)

one more question....

cv-r non pull start
cv pull start

can I put the Non p/s backplate on the CV? with out any modding?