21-5k were good engines , heavier crank created a smooth ramp up but port design was designed for torque , well rounded engine

Fyi: keep a close eye on the rear bearing , replace with 16004 when its time

Do you think I need a front ceramic bearing?

1airborne

Is it necessary ? No

You have been a good friend in the RC industry. I very pleased to associate with you. Have had my bad days and some good. But you have been very helpful. In my first year of nitro'ng. Hoping to have many more good years to put to my credit.

Full Monty X3 coming up, sounds very tastey from what I've been reading.

Thanks Alot,
Will

Thanks
1airborne

Hum doesnt sound like a great engine maybe back in the day going to pass then -thanks

I didn't mean to make it sound bad, its a great running engine

They can definitely benefit from a little "tuning"

thank you Will

having some good honest guys means alot , call or text anytime bro

HOUSTON'S ENGINE IS TEH BEST JUST THE BEST..

HOUSTON'S SERVICE IS THE GREATEST JUST THE GREATEST..



Monty is the Man... can't wait for the 2012 line up so i can't start spend some money.... right now to cold to do anything.. so ama just chill and try not to get fat..

hi Monty,i'v recently installed one of your new FUSION X7X engines into my XT8 truggy,beautiful engine indeed,just a couple of questions,roughly how much fuel are you guys running through them before you are ready for final [race] tunes;what is the ideal nitro content for x7x engine[with your shim setting]what carb restrictor/manifold/pipe,would you suggest"for best bottom end "pop"
i run Meccamo 25%,around 1.5 gallons so far,pipes i have;reedy 2035,RB 2045,all rb manifolds,AXE 2050,OPS 2010 adjustable square manifold,Alpha 2090 variable tip size,Nova long & short manifolds,any thoughts on those or suggestions will be greatly appreciated,and passed on to the growing army of FUSION X Engine owners down under
thanks for your time,cheers guys,
Scott Elkins

You will love the Fusion line mate! They are something else!!

I have found that around 3-4ltrs is the sweet spot, but every engine is different, one may take you 6ltrs and the next might take you 2ltrs, best to take every motor as they come!

As for pipes, the 9901 is a great all round pipe, but i think the 2096 has a touch more bottom (from what i have heard any ways).

You will have no problems with bottom end on these lil motors they are super punchy for a 7port!!

I lent a stock X7 to a local truggy racer here in WA to test with a 9901 and short manifold and he LOVED it!!!!!!! Said the bottom was way more than the motors he used to run (wont say the brand but a well known manufacturer). He bought a HES xtreme after that to really test the strength of his truggys drive line!!

Cant go wrong with the Fusions..........

nice work buddyappreciate the response and the support here i'm seeing is fantastic,+1 guys

Welll scott , your clutch and a free drivetrain is very important as well but I have personally been using the 9901ss/41021 combo with the X7 in the truck .

If you are gonna run 25% I would drop the shimming .10mm or leave it and run 30% like they should be ran with ,

The 9853ss pipe is known for the super punchy low end , just let Dave know if you need anything

good info,thank you,i'll switch to 30%,and pick up both pipes in the near future,
x-ray have an excellent free spinning drive train and i usually run the Fioroni 4 shoe on various settings depanding on track quality,thanks again.

Scott.E.

Monty-P