Ofna Force .21 JL

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09-23-2010 | 09:03 PM

#1021

chris c

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anyone try one of these in a truggy???

09-23-2010 | 11:09 PM

#1022

off road god

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Quote:

Originally Posted by chris c

anyone try one of these in a truggy???

Yep. After ya break it in,drop 1 shim and run a torque pipe...it works well.

09-24-2010 | 03:37 AM

#1023

xxxntwv

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No need to drop head shim.If you run 30% nitro be careful I tried dropping shim and the engine predetonated.Almost ruined it got lucky I found it after 2 tanks.

09-24-2010 | 03:42 AM

#1024

Greg B

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Blow'er up Dave

09-24-2010 | 08:24 AM

#1025

Maximo

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Quote:

Originally Posted by xxxntwv

No need to drop head shim.If you run 30% nitro be careful I tried dropping shim and the engine predetonated.Almost ruined it got lucky I found it after 2 tanks.

Not all JL .21's are shimmed the same...some have 4 head shims and some have 3 head shims.....

09-24-2010 | 09:47 AM

#1026

-R2-

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I had 47 in mine and pulled it after the break in and was good to go.

Sorria I meant to say 4 I don't know how I got the 7 in there.

Last edited by -R2-; 09-29-2010 at 03:23 PM.

09-24-2010 | 10:22 AM

#1027

Jaz240

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From: Dwindle city

Quote:

Originally Posted by -R2-

I had 47 in mine and pulled it after the break in and was good to go.

Those must have been some really long Cooling head screws

09-24-2010 | 10:37 AM

#1028

ScottyM

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From: Miami OK

Quote:

Originally Posted by Jaz240

Those must have been some really long Cooling head screws

That was my thought also..

09-24-2010 | 04:38 PM

#1029

Integra

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Quote:

Originally Posted by Jaz240

Those must have been some really long Cooling head screws

09-27-2010 | 11:38 PM

#1030

Lille-bror

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Joined: Jul 2009

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From: Frederikshavn, Denmark

Quote:

Originally Posted by rkhess

easy mod and you can run inserts on the stock carb ! been running great since feb! 1/2inch counter sunk bit go nice and slow,test fit as u go with insert o-rings off ....once it fits snug light sanding w/ ultra fine bit sandpaper clean, add o-rings easy as pie

Hi.

I've the new HPI F3,5 Pro engine (same as Ofna Force JL and Killer). The Novarossi venturies fits the carburator. I'll try a 6 mm very soon.

Cheers

09-29-2010 | 03:24 PM

#1031

-R2-

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From: So Cal.

Quote:

Originally Posted by Lille-bror

Hi.

I've the new HPI F3,5 Pro engine (same as Ofna Force JL and Killer). The Novarossi venturies fits the carburator. I'll try a 6 mm very soon.

Cheers

Yes it maybe but I think our pricing is better on the market.

09-29-2010 | 06:10 PM

#1032

easyryder

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From: Tucson,AZ

JL is bad to the bone, got 3 when they first came out and all still run great, 11 mins per tank all stock, tuned on the line

10-20-2010 | 12:51 PM

#1033

Lille-bror

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From: Frederikshavn, Denmark

Quote:

Originally Posted by kgombe

i tried jp3, 9901, 2013, bullit 1005(oh yeah i got 1 of those)... on the track i was running on i prefered the 9901 with the jp 3 running a close second... the 9901 allowed me not to have to much wheel spin and all the top end in the world and then some... i'll tell you what this engine screams... oh yeah and the 2013 would come in 3rd.. 1005 was ok.. but it lacked something.. i only noticed it when i tried the other pipes.... seeing that was the first pipe i tried...

Hi KG

Old post, I know.

Yep, the 9901 are VERY good on my HPI/Force stock engine. So much better than Hong Nor 2047! Had to lean the HSN 1/3 and gained more than 1 minute extra runtime

Addition: Stock shim, OD77T plug, 20% nitro, 5 liter through her.

Last edited by Lille-bror; 10-20-2010 at 01:04 PM.

10-20-2010 | 01:04 PM

#1034

kgombe

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Quote:

Originally Posted by Lille-bror

Hi KG

Old post, I know.

Yep, the 9901 are VERY good on my HPI/Force stock engine. So much better than Hong Nor 2047! Had to lean the HSN 1/3 and gained more than 1 minute extra runtime

real old post.. lol... oh yeah i still use this engine as a backup... and it runs great... mine was modded buy clockwork... never ran a stock so i can't give a comparison... but i like it as a backup....

10-20-2010 | 01:10 PM

#1035

Maximo

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Quote:

Originally Posted by Lille-bror

Hi KG

Old post, I know.

Yep, the 9901 are VERY good on my HPI/Force stock engine. So much better than Hong Nor 2047! Had to lean the HSN 1/3 and gained more than 1 minute extra runtime

Addition: Stock shim, OD77T plug, 20% nitro, 5 liter through her.

RE10 or JP3....I have tried about a dozen other pipes and none work as good....

Here is my 8 gallon old JL 21 on a JP3....the engine just howls on this pipe...tons of power across the entire RPM range....

http://www.youtube.com/watch?v=677bE6_te6w

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