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



Posts: 339
Joined: 4/9/2004
From: Glendale, AZ, USA
Status: offline 		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.
       Post #: 1

RE: If you run an OFNA pipe and want more power..... - 5/8/2004 12:46:59 AM   
Limegrntaln



Posts: 501
Joined: 3/1/2004
From: Surprise, AZ, USA
Status: offline 		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

(in reply to fourboltmain)
       Post #: 2

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



Posts: 3616
Joined: 1/29/2002
From: From LA to Avon Lake, OH, USA
Status: offline 		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



Posts: 339
Joined: 4/9/2004
From: Glendale, AZ, USA
Status: offline 		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 >

(in reply to Limegrntaln)
       Post #: 4

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



Posts: 501
Joined: 3/1/2004
From: Surprise, AZ, USA
Status: offline 		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

(in reply to fourboltmain)
       Post #: 5

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



Posts: 1161
Joined: 12/28/2003
From: Staten Island, NY,
Status: offline 		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)

(in reply to Limegrntaln)
       Post #: 6

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


 

Posts: 429
Joined: 9/9/2003
From: Oakville, CT, USA
Status: offline 		Was the power increase in low end?

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OFNA 9.5 MBX w/Axial .28

(in reply to joes75)
       Post #: 7

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



Posts: 501
Joined: 3/1/2004
From: Surprise, AZ, USA
Status: offline 		I havent driven mine yet..

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Lime
Ofna 9.5 C-HUB, Ofna Hyper 7 TQ

(in reply to Gsir8)
       Post #: 8

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


 

Posts: 2148
Joined: 1/18/2003
From: Pella, IA, USA
Status: offline 		ok does the 063 make bottom end or top end??

(in reply to Limegrntaln)
       Post #: 9

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



Posts: 927
Joined: 5/7/2002
From: Arcade, NY, USA
Status: offline 		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



Posts: 339
Joined: 4/9/2004
From: Glendale, AZ, USA
Status: offline 		RCaeroguy You are correct sir.

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

(in reply to RCaeroguy)
       Post #: 11

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



Posts: 414
Joined: 4/4/2004
From: Wales, UK,
Status: offline 		cool, just done mine

(in reply to fourboltmain)
       Post #: 12

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



Posts: 501
Joined: 3/1/2004
From: Surprise, AZ, USA
Status: offline 		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

(in reply to samcim)
       Post #: 13

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



Posts: 2283
Joined: 7/28/2003
From: London, UNITED KINGDOM
Status: offline 		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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Original & best sh0wtime on RCU, accept NO substitutes! anything else is just a poor immitation!

(in reply to Limegrntaln)