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does size matter?? or could small blocks be the way to go?

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Right now I've got the Savage .25 RTR and an old school T-Maxx with an OS .15 CV-RX . I love both trucks and they are both different animals in my opinion. The small block wraps up alot quicker but lacks the torque of my big-block Savage. On the same hand, the big block creates awesome power but on a tight track a well tuned small block would beat it. I say this 'cause a bud of mine was racing me with his Maxx against my Savage. He would bust out of the turns way quicker than me but 3/4 way down the straight I would catch him only to get smoked again coming outta the turn. Theres alot to be said about both mills and picking a fav would be very difficult for me. If I had to make a choice though..........think I'd rather be shot......LOL Just my $0.02 worth Hope this helps ya bud!!
 
XTM 24.7 in a t-maxx that weighs 10.2 oz. you will never miss that small block..ever....ever-ever-ever....
 
Bigger.... but I'm happy with my .18 sirio prob cuz I havent ran a bb maxx yet.
 
I'm all for small for some reason i mean i pushin maybe 45000 rpm with a supercharged sirio 18 and my buddy got a sirio 27 and its got way more recipricating mass and it only goes to like 39000 and to me 6000 is alot but maybe I'm wrong its so confusing some of this stuff:dumb: he wants to drag and i told i would once i installed my tranny so heres hopin!!
 
You might be able to spin higher rpms, but the torque of a big block has more horse power at lower rpms. I have your same sirio and rb innovations super charger and my big block xtm 24.7 is much faster off of the line. I tested both at the same time and I pulled the sirio off after only 2 tanks of gas: and I still have it in a box!
 
No one should get mad. While you might get a better response when trying to sell your engine and supercharger by posting it in the right section of the site, you are answering a direct question with a direct answer. No foul there.

As for the original question, big or small size matters only in comparison to weight of the vehicle it is driving. A Big Block in a heavy RC will give the same performance in proportion to a Small Block in a comparably weighted RC. In otherwords, the power to weight ratios might be equal giving equal performance.

A Big Block on a really light RC is almost unbelievable when it comes to performance, but that doesn't mean that a properly geared and well driven Small Block can not beat it.

So size does matter...but it is all relative.
 
I ran the maxx with the 2.5, didn't like it. I think i had a bumb engine or bad tuning. I replaced it with an OS .15 cv-r(X) and it just didn't have the juice.

I've gone to a 21 conversion and never looked back.
 
Well to answer the actual topic question.....NO as it's all relative and a matter of personal prefference and application.

First of all, I can't belive that no one has mentioned the fact that smallblock generally get better "gas mileage" then big blocks. My buddies Mod'd Picco .26 sucks through a standard Maxx tank in no time. You can always refuel (ofcourse) but during "endurance" races amongst buddies and in general bashing it's awesome to have a long run time. High ported engines like the SIrio .18 which many consider a "big" smallbore don't get great fuel economy but they still genrally have a longer run time then a comporable big bore.

The biggest thing that many new to this hobby don't realize about BigBore engines is that they don't actually add ALLOT of top end speed to your truck or car in general. You'll get their allot faster with sick acceleration but doing a Big bore conversion on your Maxx isn't going to add 10mph to your top end in general. Any Monster Truck racer with true experience will tell you this.

Yes, you can't beat displacement but again it's all relative. The thing that you really get from a BigBore that you often wont get from even the lowest designed smallbore is TORQUE in general and especially low-end torque which is vital for hardcore RC rockcrawling and many other applications.

SO, If you want great power, descent torque and better fuel economy, An aggresive SMallbore may be the way to go. If your hellbent on total power and want as much torque as possible then a Bigblock may be the ticket for you.

As for Superchargers on Nitro glow engines......I've said my peace on thsoe in the past. I love "boost" on "standard" combustion engines whether it be a Turbo, Supercharger or NOS. I think I'll stick to natural aspiration for my nitro engines....lol.

Peace
 
i can still get 10+ min out each tank with my xtm 24.7..plenty time for me to bash around with before pit stops to check for loose screws etc. and give the mill a rest, although more time out of each tank of course is always nice. but i swear my friends savage 25 gets like an hour off that daym oil tanker he has hanging on the side of his chassis. when I'm ready to go grab a burger hes still trying empty that darn thing out....
 
Originally posted by alkyula
i can still get 10+ min out each tank with my xtm 24.7..plenty time for me to bash around with before pit stops to check for loose screws etc. and give the mill a rest, although more time out of each tank of course is always nice. but i swear my friends savage 25 gets like an hour off that daym oil tanker he has hanging on the side of his chassis. when I'm ready to go grab a burger hes still trying empty that darn thing out....
Click to expand...



The reason for this is the Maxx has a fuel capacity of only 125ml and the Savage has a 160ml fuel tank. Got to love having the bigger fuel tank.
 

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