!!! help swaping Intake Manifold
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Honda-Tech Member
Joined: Jul 2008
Posts: 1,343
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From: Los Angeles , California
i got a question ?? is it hard to swap the old cheap plastic Intake Manifold to the SI Intake Manifold if so what eles do u need to do any other stuff like fuel rail or some thing
need HELP !!!
here pic from this

to this !!!
need HELP !!!
here pic from this


to this !!!
its very commonly done. its called a dpfi to mpfi conversion. you remove the dual point intake manifold (2 injectors) and replace it with a mpfi manifold (4 injectors)
here's a nice writeup on what to do. there are also many others out there
http://hondaswap.com/swap-articles/d...writeup-49557/
"DX,STD (DPFI) -> Si,HX (MPFI) wiring
PARTS/TOOLS NEEDEDPrices are in canadian currency and may vary depending on where you go)
- Si ECU(PM6 for manual transmission)-----$75-$120
- Si Distributor--------------------------------$50-$120
- MPFI intake manifold - including throttle body, fuel rail, injectors----$70-$90
- Resistor Box(88-91 Si)------$20-$40
- Si wiring harness(needed for injector plugs, injector resistor box plug, and distributor plug)-----$0-$10
- Intake manifold gasket- (not needed but recommended)-----$15-$20
- Manifold Support Bracket ------$0-$10
- Si fuel line from filter to fuel rail-----$0-$5
- some extra wire ------$3-$7
- electrical tape or heat shrink(better)------$1-$10
- wire stripper/cutter------$5-$15
- soldering gun and solder(not needed but highly recommended)------$10-$18
Parts could cost anywhere between $230-$405 depending on what kinds of deals you can find and where you get them from, it may also be cheaper if you buy everything from one person all at once"
here's a nice writeup on what to do. there are also many others out there
http://hondaswap.com/swap-articles/d...writeup-49557/
"DX,STD (DPFI) -> Si,HX (MPFI) wiring
PARTS/TOOLS NEEDEDPrices are in canadian currency and may vary depending on where you go)
- Si ECU(PM6 for manual transmission)-----$75-$120
- Si Distributor--------------------------------$50-$120
- MPFI intake manifold - including throttle body, fuel rail, injectors----$70-$90
- Resistor Box(88-91 Si)------$20-$40
- Si wiring harness(needed for injector plugs, injector resistor box plug, and distributor plug)-----$0-$10
- Intake manifold gasket- (not needed but recommended)-----$15-$20
- Manifold Support Bracket ------$0-$10
- Si fuel line from filter to fuel rail-----$0-$5
- some extra wire ------$3-$7
- electrical tape or heat shrink(better)------$1-$10
- wire stripper/cutter------$5-$15
- soldering gun and solder(not needed but highly recommended)------$10-$18
Parts could cost anywhere between $230-$405 depending on what kinds of deals you can find and where you get them from, it may also be cheaper if you buy everything from one person all at once"
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