NEW HPI ENGINE
 

What do you guys think about this new engine?

http://www.hpieurope.com/piw.php?lang=en&partNo=101584

That is the same as the OFNA JL 21

crankcase looks different to me

OS based?

3.30HP! thats power haha.

I totally agree:nod:

50,000 rpm too.

No Ofna JL ever hit 50k RPM. I hardly doubt this one will either but it's claimed and it looks promising. This needs to be sold through Hot Bodies so the Infrantry Team can run these as part of the sponsorship.
It almost looks like it's going to be a European part only.

It's called marketing. The newbs just love to see inflated hp and rpm numbers. But in the end, it's still a $200-2 gallon motor.

haha i saw this a while back and was wondering about those outrageous claims...I can't tell what engine it's based off but it has an adjustable carb insert and looks somewhat promising..I wonder will it be sold through HB wouldn't mind seeing how it performs

They are very good engines.... especially fast when modified.... not Italian quality, but the best of the Taiwanese engines IMO.... So far the modified ones have been getting 8 gallons plus and are faster then any of the much pricier Italians ! Nothing like running over the backside of a $400.00 Italian with a sub $200.00 Taiwanese....

ha 50,000 rpm, 3.33 hp lol but its a nice looking engine and its a 5 port it might be good i dont know if they will sell it here though.

i like your avatar greg b and its true.

50 000 RPM LOL and 3.3 HP ..... not quite.....but they do have a killer top end.....

Hi.

I hope to race one from 2011. Any of you what pipe and header the English HB driver used at the British Nat?

I didn't know that anyone had run the engine yet. I don't know about pipe as I need to find out if it's going to make it in the states.

Hi.

Just found the article.

http://farm5.static.flickr.com/4085/...b14d707b_z.jpg

The sleeve,carb, and head looks similar to the werks b5.

this engine is based off of a rb engine

This engine is a Force .21 .....it is also branded as the OFNA JL .21 and RB K9/K10...........

Cool. The Killer engines are great, but like other low cost engines the runtime isn't fantastic :)

Just talked to the Danish distributor. I'll get my HPI engine in a few days :nod:

Do you know which pipe and header HPI recommend?? RB suggest 2045 for their Killer 10 engine.

I've found the losi re10 really wakes the engine up.The 2045 really kills the power and doesn't get much better fuel economy.With the re10 I get between 8-9 minutes on my JL in a buggy.

Hi.

Thanks alot :-)

I haven't got that pipe but will try a Novarossi 9901 and a Hong Nor 2047 + 4 different headers. I'll let you know - perhaps in next week. I'll receive the engine tomorrow :nod:

+1...the RE10 is great on the engine...the JP3 is also great................the 2045 works, but reduces the power quite a bit..

The beauty is in the house :nod:

http://farm5.static.flickr.com/4125/...25fdf9d44f.jpg

Uses turbo plugs.

Novarossi venturies fits in the carburator, so I can go down to 6 mm venturi, to see runtime and low end power.

I'll not compare it against a Novarossi Plus 4 engine (so damn powerfull :nod:), but against my NOSRAM RS .21 RR engine.

What a great engine :nod:

Broke her in using the heat cycle. Took 2½ liter of fuel before she (he???!!! :D) dropped the balls :lol:

Easy to adjust - even with 6 mm Novarossi venturi. Steady as a rock.

Hi.

I used my Hong Nor 2047 (2-chamber) pipe for the break-in and some normal practise. I thought that pipe worked great on the engine... Until I tried my Novarossi 9901 pipe! GOD DAMN, that pipe put some power in the engine!!!! Much more power, more than a minute longer runtime on a tank of fuel, and even easier to adjust!!! I had to LEAN the HSN 1/3 of a turn to get her run just clean on the straight. I didn't want to compare this engine with my Novarossi plus engines... But they are damn close...!!!!! :sneaky:

This engine is compareble with much expenciver engines with just a little shorter runtime - just choise the right pipe :). I run O'Donnell 77T plug, 20% nitro, stock shim an a NOSRAM (long and ]-shaped) header. Next year I'll try the Novarossi 41021 header (shorter header and )-shaped).

Honestly, thats a REALLY great engine!!!!:nod:


Anyone wants to try a new engine???? Buy a HPI!!! :nod:

Happy New Year! :p

I've just tested my new JP-3 pipe to make a comparison to my Novarossi 9901 pipe. It's winther here in Denmark, so I could only drive on a frosen lawn.

The performance seemed to be similar between the two pipes and the carburator setting was similar too. I've to test in the sping on our track to see bottom and top power between the two pipes.

2 gallon? funny how they seem last just as long as the expensive motors:lol:

i bet your one of them guys who wont try it because its cheap.
why would ryan lutz run a 2 gallon motor? idk mybe because it lasts for alot dam longer....

That's funny stuff right there. Are you serious? The answer would be because he gets them for free. Or even better because he gets paid to run them. I'm not knocking what he runs, or anything for that matter. I just LMAO when I see posts like that. Ryan is a great dude and I'm sure he runs what he wants to, but your logic that a product is of high quality because a pro driver runs it is flawed.;)

first:
A 2 gallon motor...
wouldnt last a race day... by the time you broke it in etc.

- also, theres more to the story of "free" then you think with alpha :)

as for the person not liking them. buy one from me. let me tune it every time you use it and ill give you a 8 gallon guarantee, and yes this includes keeping up(if not passing:lol::lol:) the expensive "overrated & overpriced" engines.

and no jammin i am NOT saying the cheaper engines ARE better im saying they sure do give them "a run for there money":lol::lol:

as for someone saying about runtime on cheaper engines,
a guy at our track does 9.5mins(safe, not run out) on a gx7r with 2072 pipe in a mp9. but he does 10 min qualifiers before it runs out completly

JAMMIN, 808's right there.
theres more then meets the eye with "free" from alpha.
same guarantee i run :D

ooh, 9.5mins in a mp9 seems about right on that track... might have to try one of them gx7r's one day :nod:

Zing right over your head. You guys totally missed my point. I don't care if it is Alpha, OS, Novarossi, whatever. Just because a pro driver runs it doesn't mean it will last a zillion gallons. That argument may get you some sales from beginners, but anyone that actually knows the hobby knows that doesn't mean $hit!:lol:;)

How did Alpha even get into this. I thought this was about the HPI engine(JL, Killer 9/10)????:lol:

+1

Please stick to the subject or go to The $200 motors vs $550 motors thread...

Hi.

I've been in contact with Hot Bodies D8 / HPI Pro driver John Holmes from England. He was the test pilot on that engine, and has been racing them for a year now. Here is the setup he is running:

Stock engine.

Stock shims.

HPI R8 plug.
(He is very impressed with those plugs, and I'm going to try them for sure :nod:) R8 are cold and R7 are warmer.

Stock 8 mm venturi.

Running 30% Optifuel.

JP-4 pipe.

Very fast on the straight and enough bottom.

About 9 min runtime.

John:
"I have been using them for a year now I was the test pilot,the components are very good for lasting , just replaced a couple of bearings due to running engine in very wet weather but other than that no problems"

Some backyard testing:

After 6 liter of fuel, I couldn't get the engine to accelerate perfect like it did before. I removed a 0,2 mm headshim, and that solved the problem. Like HPI suggests, the standard 0,8 mm headshims are for 25% nitro, so a total of 0,6 mm shims fits my 20% fuel great.

6 mm vs 8 mm venturi:

With JP-3 pipe, 6 mm venturi and 20% nitro, the engine runs very well. Nice bottom and a ok top (33.000 RPM).

Then I put the stock 8 mm venturi in the carburator. I had to turn the HSN 7/10 of a turn OUT, to get the setting right!!! The bottom became less aggressive. Actually it sounded like too soft clutch springs. The top rpm was now 34800 RPM.

Next was my Dynamite 086 pipe: The HSN was very rich, and I had to lean it nearly 1/3 turn! Bottom was a little better and the engine got 35400 RPM at WOT.

Last up was Novarossi 9901:
Very similar in performace with the 086. The big different was the tuning. Had to lean the HSN 1/4 of a turn, to get it right.

HPI Engine + X pipe combination
 

hello there,
just got my HPI Nitro Star engine. As i understand, the best combination for this engine is with 9901 Novarossi pipe :) Hope that will work for me :) . any more suggestions about venturi, tunnig or anything else.
this will be my first season on nitro buggy model, so any help concerning this engine + pipe would be appreciated.

Hi.

I really really like my HPI. Compared to many other engines, this baby are very easy to tune (everything is relative :)). I would say its the best engine for a newcomer into nitro.

For me the 9901 are the best. One thing I also like with the 9901, are the header. Its made of alu. Many other companies use some sort of metal (iron) (e.g. Jammin, SH, Hong Nor, NOSRAM, Picco etc.) and they break from time to time. The last 4 month I've seen 2 of those headers break. Perhaps its randomness, but I've never in my 25 years in nitro RC seen a alu header break.
I was a mechanic for a RB Killer 10 (same internal parts + carburator but more expensive ;)) engine at a race in the start of March. It was running with a RB 2045 pipe set and despite what many other say, it worked very well.

Start with the stock venturi, and learn how to tune. After that you can try smaller ( I really like my Novarossi 6 mm venturi). The smaller venturi, the more sensitive the needles become.

Use the Break-In Bible for break in.

Cheers

Thanks a lot. SOmehow i feel, i got a really good motor :)