Bruce

I just got a complete upper and lower intake from a 89 gxl for my 88 gxl. I paid like 40 bucks for it complete and I was wondering if I got a good deal. Also I was wondering if anyones done an install thread that I could use?

Bruce

has anyone done this swap yet

86J

try this site

http://homepage.mac.com/carldavis/intake/intro.html

Bruce

thanks for the post this looks like everything I need

RyosukeTakahashi

I'll sell you the summit switch, its brand new never used I thought I needed it for the swap but ended up doing something different. Let me know

Bruce

what switch

RyosukeTakahashi

go to the last part called Tunning. There you will discover that you require a RPM activated switch, attached to a solenoid that will allow air from the air pump to open up the VDI chamber at certain RPMs. Its like 45 bucks but I'll sell it for less.

Bruce

did you try this upgrade. just wondering why you dont need the switch

RyosukeTakahashi

well I didn't need the switch because, I added the MT exhaust system which has a bung for backpressure. I used a T with vacuum hoses to the 6 ports and the VDI so it runs totally off back pressure. So the need for the solenoid is not needed for the way I set it.

Bruce

which way is actually better for the car in the long run.?did you try it both ways?

RyosukeTakahashi

I didn't try it both ways, but the only reason why I did the way I did was because I removed the air pump. The headers that came with the exhaust system had a back pressure bung so that you could actuate the 6 ports seeing how there were no VDI chamber in the S4 intake manifold. The exhaust system also allowed the removal of the air pump and ACV which would have been used to actuate the 6 ports and VDI in an S5. So what I did was route a vaccum hose to the back pressure bung, and t it off to the two actuators, and then another tube to the the manifold actuator, where I T'd it again so that I put a boost gauge to monitor the pressure required to open the chamber (roughly 3.5 psi) The reason for doing it this way is A) exhaust sys allowed for removal of emissions stuff not needed anymore on an S4 B) KISS keeping it simple. The solenoid was not needed because it simply stops the air from reaching the VDI actuator if a certain RPM is not reached. Well thats what the boost gauge was for. I monitored the boost level at different RPMs and wouldn't you know it at around 5200 it opnes up, other wise there was never enough backpressure to cause it to open really prematurely. Now in your set up if you plan on leaving the air pump and ACV then go with the switch (the air pump has enough pressure to open the VDI actuator all the time if no solenoid is present) Therefore the switch is needed. Other wise try my way out.

Bruce

do you have any pictures of your set up? Could you still pass emmisions with the air pump and acv gone. What else did you remove I.E. charcol canister other emmisions nonessentials.

RyosukeTakahashi

I would BOMB the emissions test so bad it ain't even funny. With my exhaust set up , all three cats have been completely removed. The air pump just feeds air into the cats, so I really don't know the effect of taking that off. Also the acv is used for the 6 port activation (I don't know if anything else as well) so by removing that it might, or might not affect emissions. I'm not to versed on this subject cause it doesn't really concern me (no emissions up here yet!!!)

Bruce

I'll probably end up going with the switch

RyosukeTakahashi

which brings me back to my first post..... I'll sell you mine brand new never used. let me know.

seventhgear

SO IF I HAVE AN N/A (no cat/airpump/wired open ports)AND DO THE S4 TO S5 INTAKE MANNY SWAP...
do i need the switch?
if so how would i go about it?.. i didnt see n e thing in that link about it..
jack

NA_VersionFC3S

RyosukeTakahashi:

What kind of power difference did you experience after you did the swap?

Tim

Bruce

I think I'm gonna get the switch from summit, its not that I dont trust you. Its just that if something were to go wrong with the switch i would like to be able to send it back.

Bruce

if you look on the last page the switch was purchased via summit and the part number is listed

darkwaveboi

what about the OMP lines?

Bruce

its mentioned in the reassembly portion

Bruce

if u use the link it tells you what to do with the omp lines
in the reassembly portion.

RyosukeTakahashi

to tell you the truth, when I did this mod, everything else you see in my sig was done at the same time (my engine blew right before I parked it for winter, and I towed it to the garage in spring and everything was put in) I can't really say that the IM made a huge diff cause it could be among many other things that I did. I do know however that ppl that have done this have experienced good gains up top, and when I was monitoring the VDI actuation above 5000 RPM's it started to pull hardcore (normally it really didn't pull this hard) So imo I say this is a good mod to do. As for the OMP lines, just bend them like the write up says, BUT really make sure the alternator bolt is in first!!

any ways, if you guys are interested in doing it the way I did it then, I'll try really hard to get a dig cam today and show you the vacuum line sys that I used, which we shall now call the Pochinko method, seeing how he is the one that developed it.

Anyone who wants the Summit switch with the receipt can talk to me, 30 shipped.

RyosukeTakahashi

well for you, since you have your 6 ports wired open, and you do not have your air pump anymore, I don't know what type of vaccum source you would use to open the VDI chamber. perhaps if you weld a small bung like the one on the MT/ RB true dual header, then either attach it to the solenoid, or directly to the manifold actuator with a vacuum gauge to mointior when its opening, other wise find a small air source that can pump out at least 3.5 psi then you could actuate it to the solenoid/ with the swicth then to open at certain RPMs.

Bruce

I know this is a stretch but there is always vaccum source running to the power brake booster. I just dont know how strong it is.