I just noticed that the SSV and APV valves do not have any vacuum hoses attached. Should there be some hoses attached to these. I am trying to find out why I am stuttering around 5000rpm

 

the plugs up the back of the engine bay between the supercharger and the new upper intake manifold on the left in the pic below are for the valves that actuate the SSV and APV valves. blue white and black connectors can just be seen.



trace them to the valves and see if you can find the connectors where the vacuum hoses go.

 

There are three connectors and two do not have any vacuum hoses.

 

Just noticed the blue connector has hoses going in and out while the white and black connectors do not have any hoses

 

Ok, just learn t that those valves have been locked in the open position.

I have disconnected the V Fad and it seems to run better.

 

you can sort them out from the diagram above. the valves should go from a vacuum source to the end inline with the plug, then the hose end at 90deg to the plug should go to the appropriate actuator.
blue plug is blue.
SSV: white plug is red
VDI: black plug is green

I thought the little silver can in the middle on the front mounting plate was a vacuum tank?

 

^ didn't see your post above.

 

Hmm why did they disable your SSV? Good call on the VFAD. You ever get your screens in there? How is your idle?

Sorry lots o questions.

 

Hmm why did they disable your SSV? Good call on the VFAD. You ever get your screens in there? How is your idle?

Sorry lots o questions.

 

i think i saw one possible problem in reference to your idle.
I see on this kit the throttle body has to be rotated. Thats ok -but it makes the butterfly valve open at a different angle to the maf. Rotate the maf pipe so that the sensor lines up to the butterfly in the TB as oem. If the sensor is out of alignment in my car it does affect idle a little and it affects return to idle some.

I sure wouldnt disable the ssv! Where is that fuel going to go to with no airflow to help it along?

 

Wow - the Maf is very close to the throttle body . Can see a few issues arising from that ...

 

Definitely going to have problems like OD and Brettus stated. the TB acts as the big restriction (wall essentially) when at idle and cruise that disturbs the air close to it. which basically is the same air the maf is reading in this case.

 

looks like the throttle is in the same orientation as std to me

he said the SSV was locked open.

I bet they are locked open due to tuning issues with an interceptor rather than any operational benefit.

 

The ssv and apv is locked open. Took the car for a run last night and it ran really well and no hiccup around 5000rpm and revs well all the way to the buzzer.

Cold start is good.

Idle is still an issue

 

heck you may be right--it has been so long since i have seen a regular one-- i may have forgotten--i was thinking oem had the connector on top?

I didnt want to lock my apv open--i had bad things happen during decel.
Like someone mentioned the TB is very close to the maf too and what type connector is that--maf to tb?

 

The supercharger setup cannot be altered. The TB has moved forward minimising the overall length which is not ideal.

Is it worth moving the MAF forward to avoid the turbulence. Another option is to consider a aftermarket intake system.

 

My decel seems fine apart from not wanting to hold idle when it gets to 1000rpm.

The connector was a foam type material. The intake pipe slides over the TB and the seal is not perfect due to the different diameters. The mechanic then tried to create a foam seal from the inside however I thought it would create turbulence and alter the size of the tube.

I just it replaced it with silicon tape which forms a better seal.

 

Is the way you have it, the way Hymee intended to have it?

It definitely is not ideal, as it can react differently upon throttle changes. Lots of disruptions in boundary layer and laminar flow.

Constructing a new intake that places the maf even a few inches further away from the throttle body would help with that.

I take it you could try the current setup, but don't be surprised if it causes problems (fluctuations) at low throttle positions.

 

As far as I know, the kit is installed as designed by Mark. Unfortunately, the kit still had some bugs so I am trying to resolve the minor issues. Currently, it is working at its best.

Yes, the connection is definitely not ideal. I was thinking of cutting the plastic pipe shorter and then using a flexible silicon pipe to connect the two pieces together. This should then provide a solid connection and laminar air flow.

 

the only issue I see with your maf is that it looks like the throttle body is jammed up the inside of the MAF.
the MAF isn't that sensitive to what happens behind it. however the throttle body is much smaller than the MAF and will create a abrupt step in diameter when in necks down to the throttle. that can't be good when the TB and MAF are so close.

what's the white bit wrapped around the throttle and MAF?

why doesn't it have hose clamps?

if you remove the white bit, is there a gap between the MAF and the throttle body?

 

if you can get 5-10mm clearance between the plastic maf pipe and the throttle body a 3-3.5" reducing coupling should work. but fitting it all would be a PITA. you would probably have to remove the throttle body and filter box in one unit.

 

I think a custom intake system is the way to go. Give the MAF a nice straight length with a few screens.

It is my plan to pick up one of these:

http://www.shaneracing.com/RX8_Perfo...ake_Parts.html

It should give me the room I need with our set up but I may have to go with a different filter. I will mod it a bit by adding some screens and a RB scoop.

 

The plastic pipe from the air box slides over the TB and the white foam is designed to provide a seal. There is a size differential between the TB and intake pipe. There is no room for a reducer unless the maf pipe is reduced in size.

 

I the length of the intake is the same as OEM then you end up in the same situation.

I think an AEM type tube with the filter behind the bumper bar may work

 

Do not use the Shane intak with a Hymee setup. You do not have enough length available to get the MAF positioned properly due to the TB relocation. To make it work with the filter in the engine bay would require too small of a filter for NA use, let alone FI. The filter will need to be moved to the front bumper area in order to have enough straight intake tube length before and after the MAF I'm not sure the AEM will work either because it has a size change built into it that might interfere with the necessary mods required