Rotary_Powerd

Hey guys, I live around Boston MA. Is there anyone around that's done the VDI swap? I was wondering if anyone could give a hand with the swap or recommend a shop that could do it. Though I'm a college (read as: don't have much cash lol), I'd of course be happy to give some compensation (Some beers or a little bit of cash). Anyone able to help a fellow RX-7 owner out? Any help is greatly appreciated

RotaMan99

Its very easy with some time and a little modification.

You will have to find out how to operate the VDI though. I operate mine with a lumbar air pump and rpm switch that works very well.

I don't know who else can do it. If I had the car at my place I have everything to do it plus the manifold and spare parts. I live in NH. About 50 min from the border.

Do you have an tools? Grinder? If so then you could do the swap your self.

Here is some more information on the swap.
http://howto.globalvicinity.com/gv_w...i=63&co=1&vi=1

Rotary_Powerd

Thank you for your reply, I bought the LIM & UIM already off ebay. Parts I think I still need is the VDI actuator/solenoid, one of the S5 fuel rails, some gaskets and an RPM switch.

I have the necessary hand tools, and a good drill + bits, but don't have grinder, maybe I could get one for my drill... What tools do think I might need? I figure the usual sockets, ratchets, torque wrench, right? I have a haynes manual as well...

I'm guessing it would be a little over 2 hours to get up there.

The things that worry me the most are the vacuum lines and the VDI activation (want to use the stock air pump on it), I'm going to try to keep most of my emissions stuff because of the MA sniffer test. Most of the Emissions junk seems to be on the LIM anyways so I shouldn't worry too much about that.

Do you have any advice when approaching the project? If I can't get all the necessary tools/materials I might be taking a trip up to NH, :P If you don't mind that is.

RotaMan99

I have the VDI Actuator and both fuel rails. I also, have a summit rpm switch that im not using. Im not using it for a reason though, those switches ramp up the voltage when getting near the activation rpm and if you are using a cheap relay or a radioshack relay, it will make it stick in the OFF position. I would reccomend the MSD switches.

You can't use the EGR for the S4 engine since the manifold will come in contact with it and the manifold will not seat at all. So you would have to block the S4 EGR off and use the S5 EGR which is on the UIM and you would also have to use the S4 LIM if you want to keep emmisions since the emmisions ports on the S4 LIM are below the front and rear port runners. On the S5 LIM there is only ONE emmisions port and that is in the center of the manifold.

So in that link I gave you above, Steve shows you how to grind and drill a hole for the S4 LIM stud to seat into since the stud pattern is slightly different. This takes some time. I have a dremel which works good for this though, although my air grinder is good for it as well.

- Screw Drivers, Philups and Flat Head
- 10mm, 12mm and 14mm sockets and wrenches.
- Allan keys for the block off plate for the EGR. They usually come with allan screws.
- Good pair of pliers
- Grinder, either air or electric.
- Don't need a Torque Wrench and the haynes manual may not help to much.

The best writeup to read is the link I provided.

Maybe a few other tools im not thinking off but I think that about covers it.

For vacuum line routing and emmisions operation after the swap im going to look for the link for that information. A guy did the swap while keeping emmisions and he did a writeup on it, and infact, its the writeup I followed and researched when I did mine a few years ago. I will see what I can dig up. I don't have emmisions on my engine so I did not have to think about it.

Research it first. I can tell you all day long but I would read the link in my first post and also when I find the other link I woul read over that.

You will also need new new intake gaskets

S4 LIM to UIM Gasket. Fits with S5 UIM.
S5 UIM to DC if they have been seporated.
Hylomar is great stuff to use when fitting gaskets together since the stuff never dries, it seals and protects the gaskets and also makes seporating the manifolds down the road easier without ruining the gaskets and buying new ones.

If you don't have everything to do the job your more then welcome to come pay a visit. The only days you ould be able to come are Monday, Tuesday, Wednesday. Since those are my days off. Hopefully You won't have to work those days

RotaMan99

ok I found the link
http://homepage.mac.com/carldavis/intake.html

But he tries to keep emmisions, and he blocks off the split air port which is the emmsions ports I was talking about. He also uses the S5 LIM that you can't use when keeping emmisions.

SO. Back to square one. Let me do a little research on how the EGR and such works on the S5 and I will let you know.

Right now, You will be able to use the S4 ACV, S5 BACV. Im going to see if we can use the S5 EGR.

RotaMan99

Ok, it appears the S5 didn't use a EGR valve but im looking into that.

RotaMan99

Ok, No EGR on S5. Confirmed. Hailers has passed emmsions countless times without EGR and since S5 doesn't use EGR, You shouldn't need it.

So S4 LIM with S4 ACV for emmisions.

I don't know what PSI the air pump puts out at 3800 rpm but you could easily tap into the hose from the air pump and put a pressure/vacuum gauge on it to see. You could then run a line from that nipple to a 3 way solenoid valve hooked up to a RPM switch.

Should work just fine.

Vacuum hose routing you can get from the FSM.

Rotary_Powerd

Awesome! Thank you for all your help and knowledge. I've going to keep studying up the both DYIs. I better start collecting the fuel rail, switch and solenoids I need. I'd like to do a dyno run before installing it to get a base run

Could we maybe meet up the first or second week of August if I haven't got it squared away by then? I'll do an after dyno as well.

RotaMan99

Sure. As long as it lands on Monday through Wednesday. It would be an all day project.

Rotary_Powerd

Cool! My job is really flexible in August, so I can take any given day off as long as I do my hours for the week . Since you seem to have everything I haven't boughten already, could I possibly buy the stuff I'm missing, from you, then?

RotaMan99

Yup you could.

I do have the secondary fuel rail and I have a primary rail but its a little banged up and I would be embarresed to put it on someone elses engine so I would look for a S5 Primary fuel rail if you don't have one already.

If you would like, you can use the summit switch I have untill you can get a MSD switch that I reccomend. I also have plenty of 3 way electronic solenoids to choose from to open the VDI.

I would say $50 for the Secondary Fuel Rail, Summit Rpm Switch, Electric Solenoid and VDI Actuator.

Rotary_Powerd

Sounds like deal, thanks! I would also like to compensate you with some cash for the trouble.

RotaMan99

^ Sounds good to me as well

RotaMan99

If you get another RPM switch, you could run the AUX ports off the stock air pump like the VDI. This would allow you to open up the exhaust without worring about the Aux port actuation.

Rotary_Powerd

Would the summit rpm switch do?

RotaMan99

The summit switch will do for now for the VDI. IF you want the Aux ports to run off the air pump you would have to get another rpm switch. I woudl go with MSD.

RotaMan99

btw, I think I forgot to mention that you need to buy a EGR Block off plate.

You can buy it here
http://www.2751engineering.com/fc3s_..._plates_89.htm

RotaMan99

Yup, thats the switch.

I was looking at my spare 89-91 ACV and I noticed it has the port for the VDI and AUX so we can use that instead of the S4 ACV since we would have had to make an adaptor to fit in the hose to allow a vac line to branch off the air pump hose. This way it will be nice and clean.

The plungers in the ACV seem to move freely so the ACV should work. I will have to test it properly to make sure it works though.

Since we will use the S5 ACV, if its good, you should order a new ACV gasket from mazdatrix. This way we can remove the old gasket to check the ACV check valve which is sometimes gunked up and not allowing it to funtion properly.

Rotary_Powerd

Hey BTW could you please PM your email as well, or perhaps a number to reach you at when August roles around.

Rotary_Powerd

BUMP! Anyone else in the area? (Boston)

Rotorman what days are you available nowadays? I can't wait to throw on the VDI and the header I have

Rotary_Powerd

Does anyone know what the ACV gasket is (the acronym)? I'm having some trouble finding it. Thanks!


edit: never mind found it!

RotaMan99

You have 2 RPM switches now correct?
Were you able to get your hands on a Primary Fuel Rail?

Rotary_Powerd

aaa.....nope damn forgot about the primary, I though we could get away with the stock piece. I'll order the 2nd RPM switch ASAP. Got to get the middle gasket too (between the uim and lim for the s4 right?)

BTW what's your opinion on pineapple intake sleeves?

RotaMan99

Ya you can't use the S4 primary rail, it will hit the underside of the s5 UIM and won't alow you to install it.

You need a S4 UIM to LIM gasket.

I heard nothing but good things about the pineapple sleeves. You MUST install them correctly. I believe I heard thread locker or something of the sort to hold them in place.

Rotary_Powerd

Ok buying the MSD RPM switch tomorrow BTW what do I about the pill/chip? Do I need to buy a specific chip? They look like resisters to me? Thanks!

The only thing I'm worried about getting is the primary fuel rail for the S5! I'm not sure where to get one, or how much they cost.

Stuff I've bought:

1)manifold (all 3 pieces, they have not been separated)
2)RPM switch
3)ACV gasket
4) Middle manifold gasket (will buy now)

need to buy:
1)Primary fuel rail.
2) MSD chip/pill?

buying from you:
1)Secondary Fuel Rail
2)Summit Rpm Switch
3)Electric Solenoid
4) VDI Actuator.

Wonder if this a good time to order & install pineapple sleeves? Then again, your already helping me a lot and I don't want to add unneeded time for the project, perhaps that will be a good project for another day . In any event VDI sounds awesome I can't wait to see the difference.