2000 Civic Si HX35 downpipe build
#1
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2000 Civic Si HX35 downpipe build
Anyone hungry for some pie?
This is a current sidework project - 2000 Civic SI with an HX35. Owner wants to retain A/C compressor (Florida) so the downpipe is tight. A standard radius 2.5" 90 would not work, so I made a handful of 15 degree pie cuts and was able to squeeze it in there, as well as clocking it so that all 5 bolts could be removed with ease.
Owner also wants to keep factory exhaust (sleeper maybe?) so I cut the ball/socket flange from OEM downpipe to find it sleeved and packed with sound deadener. OD of the factory cut piece is 2.125" - so I will have to take a 2.5" x 2" concentric reducer and cut it back slightly so that I can buttweld it to the OEM cutoff piece. O2 bung is retained in the factory location just before the ball/socket flange.
Anyway, specs on equipment used:
Miller Dynasty 280DX
CK 300 amp 2 series water cooled torch, gas lens, #7 cup, 2% thoriated (3/32")
1/16" 316L filler rod where needed
Jet HVBS-56M band saw for miter cuts
This is a current sidework project - 2000 Civic SI with an HX35. Owner wants to retain A/C compressor (Florida) so the downpipe is tight. A standard radius 2.5" 90 would not work, so I made a handful of 15 degree pie cuts and was able to squeeze it in there, as well as clocking it so that all 5 bolts could be removed with ease.
Owner also wants to keep factory exhaust (sleeper maybe?) so I cut the ball/socket flange from OEM downpipe to find it sleeved and packed with sound deadener. OD of the factory cut piece is 2.125" - so I will have to take a 2.5" x 2" concentric reducer and cut it back slightly so that I can buttweld it to the OEM cutoff piece. O2 bung is retained in the factory location just before the ball/socket flange.
Anyway, specs on equipment used:
Miller Dynasty 280DX
CK 300 amp 2 series water cooled torch, gas lens, #7 cup, 2% thoriated (3/32")
1/16" 316L filler rod where needed
Jet HVBS-56M band saw for miter cuts
#3
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Re: 2000 Civic Si HX35 downpipe build
I'll be honest, I hate pie cuts with a passion, but this is the best pie cut utilization I've seen. And it looks like there really wasn't any other option.
#4
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Re: 2000 Civic Si HX35 downpipe build
Thanks, I really am not a fan of them either, but from the holset flange bolted to the turbo, I had just a bit over 3" to the A/C compressor.
So it required a bend with a centerline radius of 1.75" (using 2.5" tube) and you cannot get there in a mandrel bend.
So it required a bend with a centerline radius of 1.75" (using 2.5" tube) and you cannot get there in a mandrel bend.
#7
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Re: 2000 Civic Si HX35 downpipe build
That was my question too, to the owner. The turbo mounted angle puts the compressor housing angled to the radiator, and with a puller fan, there is not any room for a silicone coupler/elbow. I suggested a pusher fan, however the owner is planning on running a mesh screen & clamp setup from what I understood.
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#11
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Re: 2000 Civic Si HX35 downpipe build
That was my question too, to the owner. The turbo mounted angle puts the compressor housing angled to the radiator, and with a puller fan, there is not any room for a silicone coupler/elbow. I suggested a pusher fan, however the owner is planning on running a mesh screen & clamp setup from what I understood.
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Re: 2000 Civic Si HX35 downpipe build
Favorite part about this post is the tubing clamp. Need me one of those!
The work you did looks great. Your customer's tastes, however, are highly questionable.
The work you did looks great. Your customer's tastes, however, are highly questionable.
#18
Re: 2000 Civic Si HX35 downpipe build
Someone hasn't done his research before posting. I know people who have ran 30 psi with a hx35 on a b16. And I'm currently running 12 no problem. Going to bump it up once I build the motor a little more. They take a little while to spool, but they work good.
#19
-Intl Steve Krew
Re: 2000 Civic Si HX35 downpipe build
Because the car in the OP is.
#22
Re: 2000 Civic Si HX35 downpipe build
hey man very nice work. i'm a begginer welder doing some similar stuff and looking for tips.
what do you use to clean the tubes after welding to give that shiny look without ruining whe scales of the weld?
also, how many amps where you using and what gas flow on the purge to get that nice root? what is the wall thickness of the tubes? i'm assuming its a schedule 5, about 2mm?
check out some of my pie cuts. sadly right now I only have 1 gas regulator so no purge for me ;(
what do you use to clean the tubes after welding to give that shiny look without ruining whe scales of the weld?
also, how many amps where you using and what gas flow on the purge to get that nice root? what is the wall thickness of the tubes? i'm assuming its a schedule 5, about 2mm?
check out some of my pie cuts. sadly right now I only have 1 gas regulator so no purge for me ;(
Last edited by eugenio.ns; 02-04-2018 at 10:11 AM. Reason: added some more info, better than flood with other coment
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