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Gixxd
RTR Novice
32 Posts |
 Posted - 09/08/2009 : 11:28:30 PM
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So I'm out running my Deuce...
Having fun...
Everything is good...until it was about to go back out.
A crack in the stock header. Right by the flange. I guess it got too hot.
My question is this: I have seen the Macs header and pipe that should work. However, the length of both concerns me.
Now I know that I can cut it to fit, and if I have read right, the total length of the header and pipe mounted should be 8 3/4"? Is that correct? What kind of performance can I hope to gain. I have the stock Q-18 quiet pipe on it now. Should I just go with the header and keep the stock pipe.
Thoughts/opinions.
Thanks.
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Rob
CERTIFIED ZONER
USA
1449 Posts |
Posted - 09/09/2009 : 09:00:24 AM
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You can definetly use the macs header and cut it to the same length as stock. You may or may not notice a performance increase. Although the macs is bigger and alot smoother on the inside, you may see throttle response improve. 8 3/4 is a great starting point. You could upgrade the pipe as well if you choose, you should see mesuarlbe gains with pipe and header combo.
Typicaly I cut my headers short and use a longer coupler to control the lentght of the exhaust system, that way if i need to shorten 1/2 i cut the zip tie and push it in. |
MV TLR OS.18
MV TLR CMB 21--retired
Miss A Go Pro 21
Miss A CMB 21
Bonzi 54 BzX4
Bonzi 54 BH QD35
TS2 OSXM21
Prather 46 Classic OPS67
JAE 12g Rigger OS TZ x3 |
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TwistedLiquid
CERTIFIED ZONER
1623 Posts |
Posted - 09/09/2009 : 09:17:48 AM
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Macs is best...Pipe length is correct but I prefer 8.5
As far as the header breaking this comes from not being supported well, and if its the stock set it will crack adventually. During a boats operation on the water it goes thru hell. Remember our race course moves...so do you. The header takes alot of the hell.
GET MAC OR BE IN BACK.... |
Thanks, Not really...
Twisted
I'm Like Racing A Dysfunctional Badger
Subscribe To My Videos
http://www.youtube.com/user/TwiztdLiquidz |
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Gixxd
RTR Novice
32 Posts |
Posted - 09/09/2009 : 5:34:14 PM
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Just so I understand.
When you guys are referring to pipe length, you're just talking about the tuned pipe and not the header right?
I believe a stock Macs pipe is over 10". So does that need to be cut to the 8 3/4" or the overall distance from glow plug to tip of tuned pipe needs to be 8 3/4? |
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rome
RTR Semi Pro
USA
382 Posts |
Posted - 09/09/2009 : 6:19:36 PM
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| hey james on a .21 how long should a mac pipe be if its a 3.5 |
its good to be fast |
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Rob
CERTIFIED ZONER
USA
1449 Posts |
Posted - 09/09/2009 : 9:16:02 PM
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| its from the glow plug to the tip. 8.5 is always a good starting point rome |
MV TLR OS.18
MV TLR CMB 21--retired
Miss A Go Pro 21
Miss A CMB 21
Bonzi 54 BzX4
Bonzi 54 BH QD35
TS2 OSXM21
Prather 46 Classic OPS67
JAE 12g Rigger OS TZ x3 |
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Gixxd
RTR Novice
32 Posts |
Posted - 09/09/2009 : 9:33:51 PM
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I hope to order my header and pipe this week. I will let you guys know how it goes.
Thanks Rob. |
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Billy
CERTIFIED ZONER
USA
2998 Posts |
Posted - 09/10/2009 : 10:04:34 AM
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| hey bro just hit me up ill take some pics of what you need to do, so that way you dont cut the wrong thing. |
BILLY BAD ASS
1/8 Miss Budweiser zen 26
1/12 Mod Miss Budweiser go.18
1/12 Mod Miss Budweiser aqu.18
1/12 Pro Boat Miss Sundance aqu.18
MRP Electric Tunnel
31" Prather mono OS.21
41" Prather mono KB.67
42" Custom Wood John Finch Wild Thing MAC.67
http://www.youtube.com/user/MrRckings |
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Gixxd
RTR Novice
32 Posts |
Posted - 09/11/2009 : 02:14:16 AM
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| Thanks Billy. I'm ordering my header tomorrow, if I have any issues, I'll be back asking questions. I let you know. |
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TwistedLiquid
CERTIFIED ZONER
1623 Posts |
Posted - 09/13/2009 : 07:53:03 AM
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8.5 is the total PIPE length...has nothing to do with the header. A new MACS 3.5 pipe will come near 11 inches which is way to long.
When cutting the MACS pipe you want to cut the intake side off the pipe off when shortening the pipe. So you measure your 8.5 from the exhaust end of pipe forward...then chop it off.
As far as .21 pipe length this depends on fuel used and what GO-Engine...Pro, or 5 port.
Pipe lengths are only references. The true pipe length for you will depends on your location more then anything. The idea is to make the pipe close to the normal length and use the sliding of the pipe in the exhaust coupler to adjust the tune. |
Thanks, Not really...
Twisted
I'm Like Racing A Dysfunctional Badger
Subscribe To My Videos
http://www.youtube.com/user/TwiztdLiquidz |
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JOSEPHKING1971
RTR Semi Pro
USA
452 Posts |
Posted - 09/13/2009 : 07:58:17 AM
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| thanks man i just picked up a mac header and wow is it long and now i know what to do with it |
JOE KING  |
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rome
RTR Semi Pro
USA
382 Posts |
Posted - 09/13/2009 : 08:28:50 AM
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i got .28 go pro 6+2 i got a 3.5 mac on it now i have not ran it yet
what do you think TL |
its good to be fast |
Edited by - rome on 09/18/2009 5:08:35 PM |
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TwistedLiquid
CERTIFIED ZONER
1623 Posts |
Posted - 09/18/2009 : 07:28:00 AM
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quote:
Originally posted by rome
i got .28 go pro 6+2 i got a 8.5 mac on it now i have not ran it yet
what do you think TL
The pipe old mans terms is to small, using a 3.5 on a larger engine will make high rpm's but you should be good, if it was me I would go 7.5 |
Thanks, Not really...
Twisted
I'm Like Racing A Dysfunctional Badger
Subscribe To My Videos
http://www.youtube.com/user/TwiztdLiquidz |
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rome
RTR Semi Pro
USA
382 Posts |
Posted - 09/18/2009 : 3:24:15 PM
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thanks i will try and see what i like better
u have alway help me out glad to see u on here |
its good to be fast |
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wurster
RTR Semi Pro
USA
484 Posts |
Posted - 09/18/2009 : 4:27:18 PM
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| im runing the 7.5 rome and it works great.The out let is smaler but the pipe its self is biger . |
wurster
Miss A Go pro .25
Pro Boat go .18
Miss Vagas moded 18
Miss Emily
theres a reson you are be hind me
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wurster
RTR Semi Pro
USA
484 Posts |
Posted - 09/18/2009 : 4:29:10 PM
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| nice to see ya posting agin James we miss ya. |
wurster
Miss A Go pro .25
Pro Boat go .18
Miss Vagas moded 18
Miss Emily
theres a reson you are be hind me
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rome
RTR Semi Pro
USA
382 Posts |
Posted - 09/18/2009 : 6:02:03 PM
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| how long should u start with the 7.5 mac pipe on .28 |
its good to be fast |
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wurster
RTR Semi Pro
USA
484 Posts |
Posted - 09/20/2009 : 10:38:35 PM
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| i started at 8.75 but workd great st 8.5 |
wurster
Miss A Go pro .25
Pro Boat go .18
Miss Vagas moded 18
Miss Emily
theres a reson you are be hind me
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Another "Macs" Question
