If you run an OFNA pipe and want more power.....  
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All Forums >> RC Cars, Buggies, Trucks, Tanks and more >> RC 1/8th Scale Buggies >> If you run an OFNA pipe and want more power.....
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If you run an OFNA pipe and want more power..... - 5/7/2004 11:49:43 PM   
fourboltmain



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I was breaking in a new engine today and got to messing around with pipes for kicks and grins. I had an RB 063 and an OFNA 063 that for all intents and purposes could be identical, except the RB just felt like it was snapping the buggy around a little better. As I was letting the car cool down through a heat cycle, I closely examined the OFNA pipe and foud that the header , where it meets the engine was blocked off to a suprising degree. This came from the mating of the header pipe to the flange, and was obviously restricting flow. Out came the old dremel and I ground out the obstruction and smoothed the turn on the short side (the side closest to the pipe). The difference?? DRAMATIC. It takes care of the old RB now. If you have an OFNA pipe, pull it off and check it out, I cannot believe the difference that it made.
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RE: If you run an OFNA pipe and want more power..... - 5/8/2004 12:46:59 AM   
Limegrntaln



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I think that I know what your talking about, when I was installing my 086 pipe I think its made the same way. Im gonna go check it out. I still dont know what day im going to the track this weekend, I guess i need to tell my wife what shes getting for mothers day so I can decide what day I can go to the track.

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Lime
Ofna 9.5 C-HUB, Ofna Hyper 7 TQ

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RE: If you run an OFNA pipe and want more power..... - 5/8/2004 1:16:59 AM   
had enough



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Wow,
Ran out to the garage to take a look
You ain't kidding, Dremal here we come

I'll post the afer pic later, I have to go to little leauge practice

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RE: If you run an OFNA pipe and want more power..... - 5/8/2004 1:18:10 AM   
fourboltmain



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LOL, my Kanais made it in, so I'll be going out sometime this weekend to break at least one of them in.

Scale, that is exactly what mine looked like. Great idea to take pics, just didn't cross my mind.

< Message edited by fourboltmain -- 5/7/2004 5:25:48 PM >

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RE: If you run an OFNA pipe and want more power..... - 5/8/2004 3:05:01 AM   
Limegrntaln



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I did mine already I didnt take pics though, I already installed it again




Ok Thank God for edit

Ofna 086 Fourboltmain modded

Lower Stock pipe

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< Message edited by Limegrntaln -- 5/7/2004 7:47:44 PM >


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Lime
Ofna 9.5 C-HUB, Ofna Hyper 7 TQ

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RE: If you run an OFNA pipe and want more power..... - 5/8/2004 3:49:16 AM   
joes75



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Thanks for that inside tip FOURBOLTMAIN, way to go. I planned on ordering the ofna 063 within the next week. Now I know I can get a little more power from doing your trick. Great pics LIME, you are the man!..

< Message edited by joes75 -- 5/7/2004 10:49:35 PM >


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HYPER 7 PCR (SW 26 v2), OFNA 9.5 C-HUB (MACH 28), HPI SAVAGE SS (MACH 28), MUGEN MBX5T MSR(OS 30), HPI RS4 3 EVO(in pieces)

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RE: If you run an OFNA pipe and want more power..... - 5/8/2004 9:03:18 PM   
Gsir8


 

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Was the power increase in low end?

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OFNA 9.5 MBX w/Axial .28

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RE: If you run an OFNA pipe and want more power..... - 5/8/2004 10:05:10 PM   
Limegrntaln



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I havent driven mine yet..

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Lime
Ofna 9.5 C-HUB, Ofna Hyper 7 TQ

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RE: If you run an OFNA pipe and want more power..... - 5/8/2004 10:20:26 PM   
nitroman88-RCU


 

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ok does the 063 make bottom end or top end??

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RE: If you run an OFNA pipe and want more power..... - 5/8/2004 10:23:35 PM   
RCaeroguy



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with the size difference on the exhaust, my guess is the power increase is on both ends. It should wind out better and have more bottom end punch.

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RE: If you run an OFNA pipe and want more power..... - 5/8/2004 10:30:01 PM   
fourboltmain



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RCaeroguy You are correct sir.

P.S. Nitroman The 063 is traditionally a low end pipe

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RE: If you run an OFNA pipe and want more power..... - 5/8/2004 11:02:53 PM   
samcim



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cool, just done mine

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RE: If you run an OFNA pipe and want more power..... - 5/10/2004 5:38:29 AM   
Limegrntaln



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Holey Smokes talking about a difference, Ive never heard my car scream like that. I though the temp was wacked out when I heard how loud it was screaming on the to end, alot higher pitch scream, I ran half a tank brought my car back in after screaming it up and down the street a few times, 244 temp and my tires were bald in a few spots.. seems like a new motor, I want to try a power coupler now since thats supposed to add some more bottom end punch, I have the 086 pipe and now with the FOURBOLTMAIN mod its a screamer on both ends.

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Lime
Ofna 9.5 C-HUB, Ofna Hyper 7 TQ

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RE: If you run an OFNA pipe and want more power..... - 5/10/2004 7:21:10 AM   
sh0wtime



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thats just another example of the poor quality a mass producer like Ofna are happy to sell
at least now people will know to check their pipes & manifolds before buying them & select a part that has been made correctly(if there are any?)
i always use the genuine RB or Novarossi pipes as the materials have been selected to give the optimum resonance & performance! 2 stroke engines, especially top of the line engines are very sensitive to exhaust tuning
the difference between an Ofna pipe & one from RB may not be immediately noticeable on the track but even if its just a tiny bit more resonsive everytime you blip the throttle think how that would all add up over a 45 minute final

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