Horatio... I did not know that they [RB] were planing on coming out with a race version!! Man that will be great!! Horatio have you done any experimenting with your suspension yet? I put anti roll bars on my savage and it helped its cornering, you should try it out on your truck might lower your lap times when you are racing. I am going to have to get a stronger servo for my zilla. Good luck racing and don't let those T-Maxx's get you.

Strictly speaking, you're not supposed to use more than 20 percent nitro in the S-25 engine. 30 percent is on the high side. That said, I use 25 percent with no probs.

Without more information, it's tricky to know why your engine isn't running right.

Obviously you'll need to run your engine in before it runs good. But remember, all new engines should be thoroughly flushed through with alcohol BEFORE starting the engine for the first time. This removes particles of metal fragments/swarf left over form the manufacturing processes.

Standard tank with primer lets in air - change it. Otherwise you'll get bubbles of air in your fuel line and you won't be able to get a reliable running mixture, tickover or throttle response.

Check your S-25 back plate is held in place and is properly sealed.

Ensure your fuel tubing is free of splits or holes.

Make sure your clutch is working correctly, checking that the springs are properly located.

The airfilter should be clean, as should the carb. Don't over do it with the filter oil. If it's too wet, the oil will run into the carb and clog it up. Surplus oil should always be wiped away with a cloth.

If the engine is reluctant to speed up, spits out alot of oil and cuts out with a puff of smoke, it suggests that it's too rich. Conversely, if the engine runs unevenly, races at tickover or cuts suddenly without warning with little or no smoke, the mixture is too lean.

Leave the low end needle alone at first - you need to get the top end needle adjusted first, since altering this needle also effects fuel flow through the low end needle. At half throttle or above, ensure your truck is able to run cleanly with a visible smoke trail. NOT a plume of smoke, just a trail. If you can't see smoke, it's too lean and your engine will be damaged.

To adjust the main needle, turn it 1/8th of a turn at a time, clockwise to make it slightly leaner, anti-clockwise to make it richer. Give the engine a chance to warm up before making adjustments and also allow 30 seconds or so for any adjustments to take effect.

Once the main needle allows reliable half to full throttle runs, allow the truck to tick-over for 30 seconds. Punch open the throttle. If there is lots of smoke and slow pick up, lean the Low end needle (turn it clockwise) 1/8th of a turn until throttle response is crisp. Conversely, if the engine starts to speed up during tickover then stalls suddenly when the throttle is punched open, the low end needle needs to be richened - turn the needle anti-clockwise 1/8th of turn and try again until crisp throttling is achieved.

I use an RB no 6 plug in my S-25 with 25 percent fuel. It runs sweet as can be.

Hope this helps.

Ha Ha, thought you'ld be pleased. Could be a while yet as the .28 hasn't even hit the shelves yet, but it's definitely on the cards.

I've messed about with the pre-load, but that's about it. The truck's steering was so bad I hardly had a chance to think about the suspension until I did the MP servo saver mod. I reckon the truck needs a little more lock - the Tmaxxs are still better on the bends as they seem to turn tighter. In all other respects my Savage seems better, but the track we were racing on was pretty twisty/technical. Perhaps a rear anti roll bar would give me more front end bite on our 'strange' UK grass tracks? What anti roll bars do you use? The kit tyres seemed to work pretty good on grass - no grip rolling but loads of wheelies!

I've got another race on Sunday, I imagine the local Tmaxx boys will be wanting revenge Bring it on!!!!!!

Only changes made have been a set of shock socks and a centre skid plate from mossdog to prevent stones getting into the brakes/drive.

BTW how's your Truckzilla .46 performing now compared to your old S-25? I still haven't ruled it out.........

Horatio.. IT IS STILL THE BEAST!!!! It puts the monster in monster Truck!! Motor runs great. But this new project I am working on is taking up alot of my spare time. I have adapted a RB C-5 motor to my fusion!! Working out some kinks then I am going to do some speed runs

A C-5 in a fusion!!!!!!!!

That thing is going to fly Keep us updated!

It's so tempting to get the truckzilla kit - you seem to be getting on OK with yours.........

I mean, everyone complains about the S-25 too - but I get on OK with it to be honest, so more than likely I wouldn't have any problems with the Truckzilla .46 either.

I could keep the S-25 as a spare and modify the Truckzilla TVPs to allow the S-25 to fit should the .46 die on me.

What roll bars do you use? And do you think I could run just the rear roll bar to give more steering response?

Horatio.. The anti- roll bar kit I got is put out by GH and you can get it from tower hobbies. I believe putting it on the back will increase steering but you would have to test it out . Because the roll bar might make your rear suspension so stiff your truck might have troubles getting over bumps. I believe you got enough tuning ability and common sense too to set up and run a zilla without any problems. But if you dropped one of those in your truck the Maxx's at your track would try to ban you from racing against them you are already giving them problems with your 25

Horatio... The 46 is kind of heavy it is ok for bashing but if your track has a lot of jumps I don't know how well it would hold up to repeated jumping. For serious club racing you may have more of a advantage with a big block RB and Sirio motors. And a lighter vehicle can enter and exit a turn carrying more speed.

Thanks for the advice - I'll have a look at those anti rollbars

Those Tmaxx racers would probably cry if I had even more horsepower

I hadn't really given it much thought about the weight of the .46 engine. We have a triple, 2 table tops and a couple of ramps. We don't always use all the available jumps, depending on who's track manager for the day. With trucks, I suppose the engine sit's a fair bit higher up. A heavy engine will really make jumping and conering more difficult, just as you explained to me.

Racing trucks is all new to me, so I suppose I'll just have to try things out. Racing on grass has it's pro's and con's.

I'll see if I can do any better using my humble S-25. It's really going good at the moment

Regards

Horatio

Horatio... Sorry , man I said that my anti-roll bars were made by GH I was wrong they are made by MegaTech tower hobbies style number LXESY3. Sorry about that.

Hey, no worries!

Sounds a little rich. Also HPI reccomends 20% fuel only so try leaning it out so not so much fuel goes in the engine and change your fuel to 20%

Hope This Helps!

Looks like GEM has long gone

No way of knowing whether they ever got that engine running right afterall

But at least we tried

Still here guys, been busy for a while. I set the high at 3 open and the low at manual set up. Then engine ran fine it didnt die on me.Although I only ran one full tank with the new settings. Already bought a the tornado(25%) fuel. I think this is a much better fuel than the red max we have here. Hope this will cure any problems, well have to test it more this time. Thank for the infos, really appreciate it.

Also have a question regarding those stabilizers. Before I used the big shock collars, when I turn it hard, I mean with the on power then hard steering the truck rolled. I ditched the collars the truck felt sloppy. When I turn it leans left to right. Would those stabilizers help the leaning?

Thanks again bros,

Have another question?

Is it really that hard to pull start a 25 engine? Im considering to order the roto start for the s25.

Thanks again.

I suppose it depends on what Springs you are using, what tyres and what grade shock oil. I'm using 25 weight oil (Associated) and the SS Purple Springs that came with it. I generally race on grass and so far I've only run the kit tyres. To my suprise, they seem to work really well - but I'm comparing my Truck's overall performance to a whole bunch of Tmaxxs that keep having a bad day when I'm around

Now I'd like to try those anti roll bars/sway bars, based on Nitrohead's recommendations. To be honest, I'm not having any problems with grip roll, but would like to see how running one on the rear would help the steering response.

BTW, glad your truck is running good!