Rebuild pro 15 or new mill?

[Rob D]

Well fired up the 4tec today started hard but finally got it running .

Checking temps after runs was 350 degrees with body off so i started tuning got it down to 300 and wouldnt run below that richen it up = dies ... But now at 300-350 man does it run it screams =devil . head smoking the whole way

But we know that 350 wont last long so now should i resleeve it i do have a sleeve or should i just get different mill ?

By the Way the Os 12 CVX was only running 200 degrees today so there was something wrong with the pro and its not tuning

I had a os 12 cvx for it but its crazy when the carb on the mach 15 came apart it ended up on the xxx nt

Lets hear some opinions

 

[mjime714]

There is smoke coming from the head? Sounds like the head or the plug is loose.

 

[Rob D]

Naw its that wonder overheat smoke

 

[nitro dave]

if the pro .15 goes belly up, by all means replace it with a new mill. The pro .15 just isn't that great. IMO

 

[Rob D]

yeah the pro scrap 15 is nothing spiecal I've replaced 2 of them on other nitros this is best running one I've had i dont get to run on road a whole lot though mostly off rd can't drive in street becuse of white trash neighbors

 

[SilentHunterKellen]

Woah watch that language young man! hehe..get an OS replacement engine...or go to ebay and get this TRX 2.5 i saw..last day is today i thinks..only 75bucks! But ya can't go wrong with an OS!
[move]-Kellen[/move]

 

[RaCinJason399]

Go for a os or see if you can do a .21 conversion then your car will kick a$$.

 

[nitro dave]

Originally posted by RaCinJason399
Go for a os or see if you can do a .21 conversion then your car will kick a$$.

a .21 conversion on a 4tec? I would like to see a link to that, do you have one?

 

[RaCinJason399]

well I was thinking that there could be a .21 engin that could fit in the 4 tec. I dont know of a conversion... the .21 that i would be thinking for the job would be a small block .21.like a os .21 vz-r (p) w/20k carb? or any motor thats smaller..ofna .. force .21 engin..

 

[x_789]

Originally posted by RaCinJason399
well I was thinking that there could be a .21 engin that could fit in the 4 tec. I dont know of a conversion... the .21 that i would be thinking for the job would be a small block .21.like a os .21 vz-r (p) w/20k carb? or any motor thats smaller..ofna .. force .21 engin..

:OMG: :ban: :spam

 

[RaCinJason399]

no u dont think so X. WELL KISS IT. Grow up and Stop ****ing up other peoples posts its geting unbelieveable. stuff it!


and i do believe an ofna motor will fit in the 4-tec. Ill look and compare other motors for you nitro dave.

about how much room is there? around the motor and the other stuff?

 

[nitro dave]

I'm not sure how much room there is, I don't own a 4tec, I just had never heard about anyone putting a .21 in one. I was curious how that would work. I bet if anyone could do it 3maxxman could.

 

[RaCinJason399]

Crankshaft Thread: 5mm
On-Center Mounting Holes, Front to Rear: 11mm (.433")
On-Center Mounting Holes, Side to Side: 31.4mm (1.24")
Back of engine(recoil)to front of drive washer: 73.2mm (2.88")
Height: 97.3mm (3.83")
Exhaust Port Diameter: inner - 9.9mm (.392")
outer - 13.0mm (.512")


Thats the 2.5 specs...

Crankshaft Thread Size: 1/4"x28
Length: 85mm (3 5/16") from front of front bearing to back of pull start
Width: 29.6mm (1.17") the width neglecting the mounting flanges
37mm (1.46") distance across crankcase measured between the centers
Height: 100mm (5.50)

and here is a ofna force .21 that should fit...

only with minor modifications.. like a shorter crank that would fit...
2.5 lenght is 73.2mm
ofna lenght is 85 mm which is a about 12 mm or 1.2 cm... shortining the crank and maby somehting with the mounts will make it fit.

 

[Rob D]

its a little bit to cramped for a 21 the 15 barly fits it you have to weasle it in and out of frame

 

[RaCinJason399]

Ohhh... well if yo dont want to do a little costomizing making it fit then go with a os.

or this motor looks cool its a Trinity .15 picco engin. fits the area of a .12 cv and a .15 cv

1.25hp @ 34,000rpm, dual ball bearings, rotary carb

http://www2.towerhobbies.com/cgi-bin/wti0001p?&I=LXRT76&P=7

theres a link. I think I might buy one for my tmaxx. my .15 is taking its last runs too.

 

[SilentHunterKellen]

I dont know why you guys would ever want a .21 or higher in a 4-tec. Way to much power than it should ever have. I doubt it could fit and run properly. But oh well. go with the os..its worth it. The 2.5 isnt a bad choice either THo.
[move]-Kellen[/move]