Thinkin' about a 1.3 DOHC swap - Off-Road Forums & Discussion Groups
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post #1 of (permalink) Old 06-04-2004, 06:16 AM Thread Starter
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Thinkin\' about a 1.3 DOHC swap

I have access to two Swift DOHC 1.3 motors, but can't really afford to make a swap right now. I can't stop thinking about it though. Is there any way to convert the DOHC to a single down draft Weber? Could the EFI intake be cut and a flange welded to it to accept a 1.3 SOHC intake? Or the EFI plenum opened up and a Weber plate welded to it? What kind a gas mileage would a dual side draft Weber set up get on the DOHC 1.3 installed in a Sammy? I've seen the stuff about the hybrid DOHC block and the SOHC head, but those twin cams are awesome. Has anyone experimented with adjusting the DOHC cam timing to bring the power band down to a lower RPM range? They sell adjustable cam gears, maybe advancing the intake cam timing while leaving the exhaust cam timing original would boost torque?
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post #2 of (permalink) Old 06-04-2004, 03:25 PM
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Re: Thinkin\' about a 1.3 DOHC swap

Are you using a an efi sammy or a carbed sammy. I'm assumming your running a weber right now.
Sarge on this board is our Weber Guru you might want to PM him Good guy and tons of knowledge.
Also Check your PM's
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post #3 of (permalink) Old 06-04-2004, 11:15 PM Thread Starter
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Re: Thinkin\' about a 1.3 DOHC swap

Okay, too much information! Could a custom two piece intake manifold be built? I could (in my dreams anyway) take the EFI intake off a GTI DOHC, run it thru a band saw to cut the short runners off. This would give me four short runners bolted to the DOHC head. Then have a machine shop mill the runner openings into a flat plane, and have a custom flat aluminum flange welded or brazed to the runners. Not expensive yet! Next I would take flat aluminum stock and make a plate to go between a stock 1.3 SOHC intake and the new flange on the DOHC runners. This plate would block the water outlets on the SOHC intake, and adapt the original Sammy bolt pattern to the custom flange. We're talking maybe $150.00, plus sacrificing a GTI intake manifold. The result, my stock intake or any modified Sammy intake would bolt to the GTI motor. My only questions are, would the bolts fit in the small space? Would the intake make the DOHC motor too wide for the engine compartment? I don't have the DOHC motors yet.
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