mtx3racer

Which engine is better? Murnan or Smeltz modded. Which lasts longer? Performs better?

suntok2

For me M. Speed modified

trey

Mod motors have a limited life expectancy. Length of life depends on the temps you run it. Most mod motors only like to run hot 280F-310F, so they are only tight for short while before needing a little squeeze and a new rod. But if the maintenance is kept up they will last you quite a while.

Never seen a Smeltz personally. I have seen about 10 or so of the Murnan's and they are quite fast. Have yet to see one blow up too. I am thinking about getting a Murnan MT12.

EdwardN

iTrader: (1)

I totaly disagree to your statment about life and temperature. Modded engine can perform exelent and run at 210-220 F and life can be very long . It is depend what modding was done, how the created power from burned mixture was use-to create temeperature or to move the moving parts in engine efficiency. It is very questionable and I have my personal expirience and my engines are running at 210-220 and performance, well, ask people around, or check some replay on the engine war thread.

Ah10

I disagree with your statement! I am running Maxpower(some people call it NovaMax), and the temp I run is in the neiborhood of 195~210, with lola body, I could almost hang with 8th scale non modified engine!

Modded motors have better mated piston and sleeve, more like less like matched perfectly so you get all the power from one combustion meaning more power. Of course all the work on crank, sleeve will also work with the force generated by the combustion!

Just my $0.02

stefan

I ran a Murnan modded X12 almost all season long and it didn't give me any trouble, only ballistic speed.

trey

Ah10 and Topgun777:

I did not say all mod motors did I? I said MOST mod motors only like to run hot. Because that has been my personal experience with heavily modded .12 motors.

suntok2

I disagree with your statement too. All modified engine has a good temp.

dtm

Which modded engine did you run which need the high temp? would be interesting to know so as to avoid buying?

EdwardN

iTrader: (1)

Any modded engine, where modifier don't take to concidiration all varibles, will ask for high temp to perform.

EdwardN

iTrader: (1)

Only incomplete (or wrong) modding will create high temp. Only unefficient engine will create temperature. Efficient engine will use temperature power to convert in HP. So, most likely you were using wrong moddifier for service or you might need to work out on tuning. Very dificult to determinate the real problem without seeing it.

Ah10

Well, no offense at all, I really dont think any modded engine's powerband will be in that temp range, and yes I have seen enough modified engines and none of those ran over 230~240. In fact I have seen 2 Steve Odonnell hand modified engines, one is on Barry's car and the other one is on Pepe's car both of them are running 185~195 range and both are flying, and yes I do mean flying! and both are 3 ports non turbo and they are as fast as those 5 port turbo engines.

trey

Then I guess someone should call JP and tell them how to mod engines correctly.

trey

Well Barry Baker is now running a Murnan Modified.

EdwardN

iTrader: (1)

yeh! You give them an idea and next engine you will pay them extra $50.