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Old 02-18-2005, 14:05   #1 (permalink)
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BBM Upgrade On EA Multi

Hey everyone, I am considering a BBM upgrade on my EA, I was just wondering if anyone could help me out with a Parts list and a little bit of a tutorial.

Do you have to change any heater hoses( I have heard u dont)

Do You need to change the termostat?,is so, for the vacum lines or for air intake?

Can I use my Current injectors? as they have been serviced recently?

Do you need to change the fuel pump? I thought the EA multi would be adequate.

Also my car already has an EL head and Rocker Cover.

And I plan to use my current computer and put in a RPM switch.

Also my car was origionally a CFI, i upgraded it to multi

Any help with these questions would be greatly appreciated
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Old 02-20-2005, 02:36   #2 (permalink)
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Re: BBM Upgrade On EA Multi

Do you need a EL,F rocker cover for this?
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Old 02-21-2005, 18:15   #3 (permalink)
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Re: BBM Upgrade On EA Multi

Hey mate I already got a EL rocker cover, but u can get one from the wreakers for $45, I am from newcastle area, go see the blokes at the hunter falcon centre. U need the rocker cover to bolt the throttle body on.
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Old 02-22-2005, 02:03   #4 (permalink)
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Re: BBM Upgrade On EA Multi

u will need the manifold, fuel rail, pressure reg on the end of the rail, the throttle cable to suit, also the fuel hoses as they use fittings not clamps, injectors can be swapped, the thermostat and housing can stay, heater im not sure i think i did swap that, the air box and ducting is swapped unless u wanna make something up.

remvoe ef/el harness from maifold. use the existing ea harness it will plug straight onto the injectors, rewire TPS and ISC and i think there was a little earth wire to lengthen aswell?

if u can put the hoses on the fuel rail first then clamp the other end later, also the return hose from the reg. can be put on theyre a bastard to tighten once fitted.

oh and grab the cluster of vaccume lines and the vaccume solenoid switch from near the washer bottle,
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Old 03-04-2005, 02:24   #5 (permalink)
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Re: BBM Upgrade On EA Multi

Yeah, Hot EA is right about the cover - an EF or EL cover enables mounting of the Accelerator cable (and Cruise control cable too if necessary) - EL cover is better to use than EF because the EL uses dizzy ignition so all the plug lead clips etc. will fit up correctly (using EF cover you need to silastic the plug lead clips into the right positions).

You will need to replace all the heater pipes and hoses with the EL parts - this is because the solid metal pipes mount up entirely differently to the BBM than to the MPEFI setup - it's not hard to do and shouldn't cost too much.

As far as vacuum hoses go - don't get bent out of shape trying to make the EF or EL vacuum setup interface into the car's original setup - instead you need to piss off all the EF/EL stuff and then simply attach the original vac hoses to spigots on the tree just the way they were on the original MPEFI setup (only the tree is in a different place and looks a bit different) - this might require lengthening of some of the vac hoses (tho from memory I'm sure I didn't need to) and of course make use of some of the parts from the EF/EL vac setup such as rubber adapters to hook the stiff plastic vac hoses to the tree spigots etc.

With the fuel hoses you use the EF/EL ones and as falcon_boy says, you need to preferably do the fittings up onto the rail and regulator before fitting because they're really hard to get to once the reg and rail are in place. The other end of those EL hoses will have quick release fittings - but on the earlier cars up to ED the hoses are just pushed onto the pipes (ie. forward/under the passeger's footwell floor) and clamped - so all you do is cut the hoses to length and attach them to their correct pipes as per the original MPEFI ones - take care to put the correct hoses on the correct pipes of course!

It's also quite easy to convert the original early model Cruise Control to work AOK on a BBM setup - ie. it simply involves shortening the cable which is actually very easy done and also modifying the bracket from near the Throttle Body - which again is easily done. The hardest part is finding a ball post to attach to the EF/EL Throttle Body arm - I may be able to supply some if people need them (for free). If anyone needs info feel free to ask - I can provide descriptions and pics.
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Old 03-08-2005, 23:07   #6 (permalink)
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Re: BBM Upgrade On EA Multi

What does this vacum solenoid switch look like? Is it behind washer bottle or infront? is this what controlls the dual plenem intake? how do you by-pass smartlock for the car to start? you do use an EL computer dont you?

Cheers. Davo
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Old 03-09-2005, 19:52   #7 (permalink)
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Re: BBM Upgrade On EA Multi

Sorry, I can't be any help with Smartlock issues - I'm using an EL XR6 ECU which is a straight plug in replacement for the ED ECU (the connector for EF ECU is different but the EL is the same as the earlier model connectors). My car already had smartlock so it all carried on working as normal - what's involved in making smartlock operational for earlier cars I have no idea but there are others here who should be able to help.

The BBM solenoid in EF and EL is in behind the windscreen washer bottle (don't know about AU - presumably the same?) - it's a cylindrical solenoid with valve body on one end and is attached to a metal bracket. The vacuum circuit for it is meant to incorporate a check valve so it's best to try and get a solenoid plus the vacuum pipes and hoses + check valve. I have that solenoid mounted on the tail of one of the bolts that come thru the firewall into the engine compartment near the heater hose connections - ie. in various places there are these bolt tails that you can just run a nut onto to hold something like the BBM solenoid bracket. I'll see if I can get a snapshot with my camera and post it.

The BBM solenoid does control the manifold - it controls the supply of vacuum to the actuator that operates the manifold. The manifold is in short path (high rpm) position with no vacuum and then when it's actuator is supplied with vacuum it moves to long path (low rpm) position. The factory switchover point is 3800rpm.

I can't recall exactly which way the solenoid works - ie. I THINK it's powered for long path but not exactly sure (from a technical point of view that's not IMO the best way for it to be set up - ie. powered for the majority of the time, but I think that is the way it's designed to work). Doing a search on here might yield some info.
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Old 03-11-2005, 00:18   #8 (permalink)
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Re: BBM Upgrade On EA Multi

instead of the el computer and fitting smartlock, u can use an rpm switch. chiptorque make one for around 60/70 bucks. its basically a shift light u can adjust to power the solenoid at 3800 or so rpm instead of powering the shift "light" itself.
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Old 04-20-2005, 05:28   #9 (permalink)
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Re: BBM Upgrade On EA Multi

hey all just another thing i have herd things like the mapping of the new manifold is different? will this effect performance if this is so or is it ok 2 use an rpm switch with my EA computer
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Old 04-20-2005, 06:56   #10 (permalink)
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Re: BBM Upgrade On EA Multi

The ECU's for models incorporating the BBM are programmed for that system - apparently the ignition map does change - BUT to be perfectly blunt I suspect the proper ECU's either limit torque deliberately or the BBM on long path is just too efficient for the same kind of ignition advance that a non BBM ECU tries to run. My reason for that is that when I used ED ECU with the BBM locked on long path, there was promise of absolutely dazzling performance but it couldn't be properly realised because of terrible pinging - whic I only got rid of by fitting EL ECU with knock sensor working.
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