Welcome to Ultimate Subaru Message Board, my lurker friend!
|Welcome to Ultimate Subaru Message Board, an unparalleled Subaru community full of the greatest Subaru gurus and modders on the planet! We offer technical information and discussion about all things Subaru, the best and most popular all wheel drive vehicles ever created.
We offer all this information for free to everyone, even lurkers like you! All we ask in return is that you sign up and give back some of what you get out - without our awesome registered users none of this would be possible! Plus, you get way more great stuff as a member! Lurk to lose, participate to WIN*!
* The joy of participation and being generally awesome constitutes winning
** Not an actual guarantee, but seriously, you probably won't regret it!
Serving the Subaru Community since May 18th, 1998!
need info on using spfi intake for a carb
Posted 21 April 2002 - 09:12 AM
Posted 21 April 2002 - 09:37 AM
Good luck, keep us posted, and were here to help!
Posted 21 April 2002 - 10:02 AM
1.) I used the thermostat housing from my EA81 (the part the hose connects to.) It will bolt right on and face either forward or to the rear. You can also rotate the SPFI 'stat housing, it's your choice.
2.) There's a small coolant hose fitting coming off the bottom of the thermostat housing. Bummer, the distributer advance mechanism will run into it when you rotate the disty. I bent mine but nearly snapped it off in the process. You'll want to drill out the hole and tap it for pipe threads then install a 90' elbow fitting.
3.) Use your old temp. sender unit that screws into the thermostat housing.
4.) The coolant pipe for the heater core needs a bit of bending to clear the oil filler neck.
5.) There's a coolant line coming off the above mentioned pipe, it used to go to the throttle body. I plugged up this hose since I'm not heating the carb base.
6.) The other electrical sender units don't get used. I bundled up the wires incase I ever wanted them.
7.) I used the big vacuum fitting on the drivers side for the brake master cylinder.
8.) I used the small vacuum fitting the passenger side for the EGR.
9.) I used the vac fitting on the carb for the distributer advance.
10.) All the other vac fittings can be removed or plugged. Lot's of spare plugs available on the Hitachi.
11.) On my engine there was a bit of the engine case material that interfered with the bottom of the SPFI intake. It was just excess material of no importance so I ground it down. If left there the intake wouldn't mate properly with the heads.
12.) PCV system stays the same. I routed my passenger side valve cover hose to the carb. The drivers side valve cover hose goes to the funky "T" fitting, so does the hose from the PCV valve, and the smaller hose from the "T" goes to a small air filter I made (same idea as the stock system where it took fresh air from the air cleaner.)
I kept my EGR system working since I haven't heard of any real power gains by killing it. I did kill my air injection system, but there's no reason you couldn't keep it working...the wiring and vacuume valves are easy to transfer over to the SPFI intake and Weber system.
Hmmm, what else? I'll go out and look things over and see what other fun lessons I learned doing the swap.
Posted 21 April 2002 - 10:10 AM
Afer a litte revising this could almost be a complete set of instructions for the swap! I could see everything as I was reading it
Posted 21 April 2002 - 01:13 PM
Posted 21 April 2002 - 02:01 PM
Posted 21 April 2002 - 02:16 PM
Posted 21 April 2002 - 11:08 PM
Posted 23 April 2002 - 03:34 PM
This is a great thread!
Posted 23 April 2002 - 04:24 PM
Mine is listed below in my signature.
Posted 23 April 2002 - 10:23 PM
Posted 24 April 2002 - 12:11 AM
Posted 24 April 2002 - 02:47 AM
Posted 24 April 2002 - 03:48 PM
Posted 25 April 2002 - 10:14 PM
0 user(s) are reading this topic
0 members, 0 guests, 0 anonymous users