Just ordered a BITZ kit

[Milo2361]

Just ordered the EFI kit from tony. I can't wait to tear into it and get her going!!! the CIS I have is fine, except for a few minor but mitigated problems, but with the price of the CIS components today, and the increased HP(and probably fuel mileage), and parts availability, im stoked to convert to EFI. I'll try to post some pics and let you all know How it goes

[smalltown718]

please post pics, i plan on doing this early next year...ive heard nothing but good things about Bitz

[Milo2361]

All right. Just got the kit in today, took a few pics (will upload all when I'm done). I'm literally halfway done. This conversion is a little bit harder than i anticipated to be honest. Some of the things i found in my car don't quite match up with Tony's instructions, but I think i'm gonna come out on top in the end . Airbox didn't come out as described, and i had a lot more fuel lines in my car than what he had shown - possibly the difference between his 1978 and my 1980? could be. Hoping i don't need the extra ones... if i do I'm not exactly sure whre the hell they go. Will def. post pics soon and i'm going to MS paint a diagram to show the difference in the diagram in the bentley(and tony's instructions) and what i actually had in my car. more updates soon!

[trond]

I too found differences when installing the kit on my 80SC, but nothing that prevented us from doing the install in one day. We ended up removing the deccel dashpot and the AAV on the engines right side and needed to plug those lines off. Also we didn't find a dedicated vacuum line for ECU (as is recommended in the manual) and ended with instead tee-ing off from the fuel pressure vacuum line which seems to work just fine. We removed the heater blower on the engines left side because of interference with the fuel rail, but we could have just made holes in the ducting as has been documented in several posts and also on tbitz group on yahoo which by the way is a great resource on both the install and tuning

[jvrrdrgz5]

I went with full ITB EFI from Clewett and did a rebuild and bump to 3.2 heads.

[Milo2361]

I think I'm keeping the CIS look for now - if i find a junk airbox online for cheap i might do the clean look, but with the value of CIS parts today, I would like to sell as much of it as possible to help recover the cost of the EFI kit. Trond(or anyone for that matter), do you happen to know(or have a list) of the CIS components that no longer need to be in the car? I'd like to remove as many as possible.

[gsmith660]

Yes you will be pleased with the bitz kit I have 2 77 airboxes one has a pop off valve one has the hole if you haven't got fuel press reg yet I recommend a better one than the one tony suggests. You will be pleased for sure enjoy

[kach22i]

Does installation require a full engine drop, or can you get by with a partial?

I have to do a partial drop to get access to the last of my CIS vac hoses, just curious.

[Milo2361]

I didn't drop it at all - the manual for the kit says it's not necessary. however a partial drop would make things a TON easier - probably should've gone that route.

The manual also states you dont have to take out the intake runners to remove the CIS Injectors+bungs. I would advise to take the runners out - my dad and I are working on this and he didn't want to until we discovered it was near impossible to remove the bungs w/o taking them out.

[Milo2361]

just ran into my first real problem. getting ready to put it back together - while putting on the right fuel rail, i noticed the Decel valve(im pretty sure thats what it is judging by my diagram) is in the way! do i need to keep this at all? i know i need to keep the aux. air regulator, and im 99% certain a fat hose comes from the decel valve to the AAR. if i get rid of this, what do i put in place of it??

[gsmith660]

The only CIS part you need to keep is the AAR not the round one the long squareish one I think even the accumulator is no longer needed so get rid of all that crap and gobbledegoop in there

[Milo2361]

yeah. but right behind it - gonna post a pic of it quick, the bottom hose on the Decel valve connects into the left side of the AAR! where would i plumb a new hose to to complete whatever circuit of air the AAR runs on? this is not described at all in Tbitz manual.

Decel valve - the bottom hoes goes to where the AAR(left side of it) is. - - also the fuel rail fitting on the side facing the front of the car hits the black mount the Decel valve is connected to. NO idea how to remove it...


Left rubber hose = hose coming from the Decel valve that goes into the left side of the AAR.

[gsmith660]

Your pics didn't load but in Tony's instructions it shows you how to modify the AAR to clear the rail and I would remove all the hoses and extraneous stuff and put an air filter on the AAR inlet and run a single hose to the airbox. Have you been to the bitzracing yahoo group yet? It has a wealth of info and pics.

[Milo2361]

re linked the pics - should show up now. but that is exactly what i was wondering about. thanks for the prompt reply!

now, is there any way to get the junk off the back of the airbox without pulling the whole thing out? - I literally just put it all back in... i didn't pull that junk off cause the instructions didn't mention them... I think tony will have to change that...

[SchnellSchweitz]

I wish I knew what the power band was like with CIS (I installed my EFI during my rebuild on a non-functioning motor).

I believe EFI improves everything though (mpg, easier start-ups, top speed, etc). The only downside is the learning curve, which is getting easier as more people make this upgrade.

[gsmith660]

Really go join the yahoo group you dont need any of the crap on the back of the motor when I installed Tony's kit for my turbo application I actually made up all new fuel lines and pulled the CIS off intact and put it on a shelf. I would go ahead and pull it all off and then you can see to plug what you dont need and you can deal with things like the cold start valve and such and then put it back as you need it I have an airbox I will sell you for 75 and you can do the clean install I would have gone that way if I had not gone with a 3.2 intake. Good luck and join the group it will be helpful for sure when you start tuning albeit it should start and run pretty well right out of the box. Schnell the difference is astounding there is no comparison between the 2 my learning curve was steep because I changed to MS extra and turbocharged added EDIS right after that which required motherboard changes but megasquirt is great and well worth it.

[Milo2361]

already on the yahoo group - this is so much faster. they dont respond quickly over there... 3 pics coming.

1. airbox drivers side (the side you see faces the front of the car). do i need this copper line? the red circle indicates a splitter that goes to something on the lefthand side of the engine bay.



2. rear of airbox(side that faces front of car). connector 1. is this needed? no clue what it is? same with number 2? number 3 is the cold start valve. instructions said to tape the wire off to prevent shorts - this has been done. now, the outlet of the AAR comes to the small fitting on the lower left side of the cold start valve. do i need to make a new hose and keep that?


3. AAV and DECEL valve. do i need to put an air filter on or can i run a rubber line from the rubber boot to the intlet of the AAR? do i need to make a new "from AAR" hose to the cold start that eliminates the AAV and Decel?

[gsmith660]

My responses are in red make sure all the unused vacuum ports get plugged that is a common error that results in a bad idle.

Originally Posted by Milo2361

already on the yahoo group - this is so much faster. they dont respond quickly over there... 3 pics coming.

1. airbox drivers side (the side you see faces the front of the car). do i need this copper line? the red circle indicates a splitter that goes to something on the lefthand side of the engine bay.


Not sure about the copper line I would say no as for the other it goes to the brake booster you need it
2. rear of airbox(side that faces front of car). connector 1. is this needed? no clue what it is? same with number 2? number 3 is the cold start valve. instructions said to tape the wire off to prevent shorts - this has been done. now, the outlet of the AAR comes to the small fitting on the lower left side of the cold start valve. do i need to make a new hose and keep that?

You need none of those 1 is the switch that turns on the fuel pump when it detect air flow the pink wire connects to one of these wires to turn off your fuel pump when the car is not running but there is a single plug down by the fuse panel that you can connect the pink wire to 2 is the TPS and is either on or off and of no use to EFI and 3 is the cold start valve and you need to remove and plug the fuel line to this and make sure it doesn't leak vacuum
3. AAV and DECEL valve. do i need to put an air filter on or can i run a rubber line from the rubber boot to the intlet of the AAR? do i need to make a new "from AAR" hose to the cold start that eliminates the AAV and Decel?
[IMG]http://i646.photobucket.com/albums/uu183/milo2361/porsche/decelandaav.jpg?t=1312325627
you can run a hose from the boot to the AAR and then from the AAR to below the throttle body right there at the cold start valve and get rid of all that in the pic but if it functions its vauable for those that have not seen the EFI light[/IMG]

[Milo2361]

thank you gsmith for the prompt replies! fuel rails all on - just took off the right hand airduct for now- will cut it later to retain the heater blower function. all fuel lines on, all i have to do is wire it and put on the vacuum hoses and we're good to go. i successfully routed the hoses to the AAR to the proper locations - everything fits just fine hoping it is good enough - i mean, it is the same system of hoses, just without the fittings for the AAV and the Decel valve. wiring tomorrow morning then the first start up.

[gsmith660]

Good deal your welcome you will be pleased.