R/C Tech Forums - NEW HPI ENGINE

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Quote:

Originally Posted by CKmaxx (Post 7866694)

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.

nearly all of the TW engines go alpha etc last far longer then two gallons. someones having a cry because his 500$ engine lasts as long as cheaper engines with same performance

OS makes a great engine.

Who had killed their HPI/RB Killer/OFNA JL engines after only 2 gallons?

Like Ryan wrote in the GO thread, he gets +7 gallon of every engine he got. That doesn't mean the engines are worn out, they are just not suitable for races anymore... :)

Quote:

Originally Posted by DRCRacer299 (Post 8608621)

Hello,
I want to stop this dead in it's tracks. Where do you get your information from? I have ran 40% nitro two times. At the ROAR Nationals in Colorado (extremely high elevation, thus majority of drivers were doing the same) and for my World Record Long jump car at the Psycho Nitro Blast. Outside of that I run 30% or 20%.
Also to say I go through motors like they were clutchshoes is completely false. I think I used 8 engines last year total. Buggy and Truggy combined! You show me one other pro driver out there with my race schedule who can say even close to the same. All my engines have lasted me around 7 gallons or so before I retired them, not because they gave up on me.
Please don't post baseless, uninformed information about me or what you 'think' I run. It's very easy to 'know' for fact what I run, It's called asking me.
Regards,
-Ryan Lutz

Hi,

I have the same engine ,but my problem is, I couldn't get the engine to accelerate perfect like it did before when i start the engine at the begining 4-5 minutes its good but later its loses the power in A-main 10 minute race when out cornering

My needle settings is LSN:2 HSN 2.75-3 CCW , fuel is HPI Optimix %25 ,Glow plug R7-R8,pipe is Dynamite 053 and the heat is 110-130 centigrade

Any suggestions?

Thanks

i have the same engine ,

have you got any suggestion for needle settings ?

thanks

Quote:

Originally Posted by Alentino (Post 9437560)

i have the same engine ,

have you got any suggestion for needle settings ?

thanks

Hi.

Remember I run 6 mm venturi and compared to the stock 8 mm, you´ve to turn the hsn 1/2 to 7/10 OUT.

My setting with 25% Byron are:
HSN 2 1/4 from fully closed
LSN 1 7/8 from fully closed

How many liters has it been running? You could try remove on of the 4 shims under the head. Perhaps your engine hasn´t got the same compression ratio as when it was just broken in :)

Quote:

Originally Posted by Lille-bror (Post 9463833)

Thanks for your reply
Engine has burn out about 4-4.5 Galons
but when its on operation temp, compression is very weak maybe this is the answer to stop problem
But when i play harder and dont use the low rpms (about idle) engine works fine

Also my friend has got the same engine same amount of usage and the same problem

Are your engine still fine ? how many galons did you use ?

Or really this is a two galoon motor ? Because, in the beginning (about 10 litres) performans was very good

And i will try to remove one shim on it

Thanks

Hi.

Mine has 18 liters (4 3/4 gallons) on it. Still very good compression and no wear on the crank and conrod. BUT: I just got new bearings from AVID today. I can drag and push the flywheel too mush in and out (yes, the flywheel are mounted correct ;)) and a little side play from the front bearing.

Will report back, when I have changed them and run the engine again :)

EDIT: Made a meassurement on the crank "pin???": Still 4,99 - 5,00 mm horisontal and 4,98 - 4,99 mm vertical. If the P/S should wear out, it should still be cost efficient to buy a new P/S set. But no need for that right now :)

Bought AVID engine bearings (total $15 ;)). Interesting to see the durability of those bearings.

My engine are still performing very well. I removed one 0,2 mm shim. Set the idlespeed a little higher compared to when it was just broken in. 20,7 liter (5,5 gallons) through it until now.

OD77T plug, Novarossi 9901/41021 and Novarossi 6 mm venturi.

Pro star + 2090 pipe

I'am going to try this engine with 2090 pipe from os. Think this combo will work super