Any pictures?

after 2 gallons:

Wow. what happened with that piston? Running too lean?

that what it looks like? thought it was a pretty good tune, fat if anything. Dont know what happened to it. Hope hpi tells me when they look at it.

Im just guessing. Its hard to tell from the pictures. I would think that the engine probably got too hot to cause the piston to crack like that. Unless you had some dirt or other debris in the cylinder.

So I ordered this roll cage to try and save my engine and key components. How ever I added like 2 lbs to it. Does anyone have any suggestions? Im not racing just Bashing, and will it kill my diffs any more then if I didn't run it?

That cage weighs that much? [] Wow
If your diffs are shimmed properly the extra weight should make a difference. The big difference you'll see is in jumping. Especially if the weight changed the balance of the truck. The body does a pretty good job of protecting everything especially since its all mounted so low on the chassis.
You get any videos running on that track yet?

ya I got the diffs shimmed Im thinking I need to change out the diff fluid to 10/100/10 to help with the weight, also go back down to the 13CB. I was running 55W oil in the shocks but the front was sagging way bad, so I upped the fronts to 80W and 90W in the rear, hoping that will help......Out here in Iraq it takes forever to upload pictures, I tryed uploading a video but it was uploading all night and had timed out when I got up so there is no way I post a video. Maybe when I go home for R&R I can post it then..........I ran that Savage XL 5.9 on the track, wow that things a tank..........Im taking my time with the HF dont wanna rush in and blow it up....as far as the weight of the roll cage, the HF RTR weighs in at about 9.5 and that roll cage is heavy.......I mean it put a load on the front shocks..they were about half way compressed.........Like I tell my buddies go big or go home.....I will find a way to post a video when I return home in about a month.....Laters

You stay safe in the meantime.

I run on lots of different surfaces. Lately it been rocky gravelly dirt which has worn the crimefighters out quick.


I put zip ties with fuel tubing on the cooling head for protection. Does help protect the head from scratches. Unless you're landing upside down of very large jumps i dont see the need for a cage.. All my shock towers are bent but they still hold up ok for bashing.

HPI offers various springs for the HF. Check your manual and mount 10lb springs front and rear. Use 50w shock oil front and rear. Set ride height so that arms are level in the rear and slightly up in the front. Use road rage onroad tires. Unless your track is huge, use a 12t or 13t clutch bell. Set your camber 2 degrees front and 3 degrees rear. This setup is only for onroad. Offroad is another matter.

Try adjusting the sway bars, that can help.

I'm thinking about trading a Traxxas 3.3 for an Axial .32. I'm not really a fan of Axial as I havn't heard much good about them but I have no use for the 3.3 and I can use the .32 in my HF. my question is how well does the Axial .32 push the HF? is it pretty strong?
Thanks

get what you pay for with axial-

The axial 32 will push the HF ok. Strong bottom end but weak top. Front bearing can leak bad sometimes.

Iam still bashing my HF hard. Current injuries:
Both shock towers bent
Broken aluminium shock cap
Leaking shocks
Bent rear brace
Rips in 2 newish tyres
3 bodies almost destroyed
Chasis bent under front diff
Cracked top chasis
Etc etc

I snapped a front suspension pin today when i hit a light pole.
Luckily i keep it running with some spares i have and lots of CA glue. Its rarely out of action and i run it almost every day.

I now have a jp3 pipe on my os28. Got a real cheap deal new. Good pipe, it really has impressive mid/top end.
Also have an 086, 2035 pipe. Wish i had a cam to vid how fast the os28 is.

Iam very impressed with the CEN diffs i put in a couple months back. No issues at all.

I had mine at the track the other day and some how I lost the cap that hold the front hinge pin in. Ive been reading up in the manual and Im going to try to tune it a little with the bushings and see if I can adjust the handling.

Those bushings break very easily. Any hard front end hit usually pops them out. I break/lose them every week. There is a mod way back or on truggy racers.com which eleminates the problem.
Let us know if you notice any difference when you change them around.

Really? Do you remember what was involved in the mod?
When the a-arm fell off I thought I tore the whole front end up. I was so relieved to find it was just the bushing

This? Igot the idea from some one on around page 44.

mr snuggles page 42

But doesnt that take away the tuning option? Or did you just punch a hole through the bushing?

It takes away the tuning option but stops it falling apart. I dont think you will notice much difference in the setup when you change the bushings around but iam interested to know how it goes. The bushings can be grabbed off ebay (4 for a few $) if you wont to stock up.
Send me some!

Im going to add 22mm to the rear of my hellfart chassis , anyone try this yet?

cut and weld baby...................

Hey Im a serious racer here. Been doing it now for like 2 weeks.
Youre right. I doubt I would even notice a difference.
What did you use for the pins with that mod?

I trying to get my Hellfire up to racing standards any1 have any suggestions on a engine, shocks, etc.? Thanks