Recirculation system

[SupraTuned]

Hey, just wondering if I can remove the recerc system on the top of the cam covers leading to the accordian pipe and the throttle body. It is in the way of my bov setup, and I don't want it their if it isn't needed anyway. I remember reading a long time ago that the ecu figures in this recirc vent oil stuff and compensates for it and expects it to be going into the engine. Any ounce of truth to that?

[bgrieger]

They should be left in place if at all possible. The ECU is designed to recognize a degree of blowby gas, but that is more a function of the O2 sensor. Blowby gas is pretty much o2 free, so it won't burn well and the o2 sensor allows the ECU to see that.

More importantly it eliminates the pressure those gasses create in the block and head, which improves engine efficiency slightly (perhaps a couple of HP max there), and keeps things like blowing your dip stick into your hood from happening. Remember the pressure has to go somewhere, and so those vents are helping to keep from blowing oil out from seals and such depending on how much blowby there is in some cases.

That said, some have put small filters in place like muscle cars do, but you need the vents in some shape or form no matter how you do it, so chances are the BOV should be the part to move if anything.

Bob

[SupraTuned]

Yeah, I thought I remembered something like that. That kind of blows, because the next best place I can mount my bov is about 2ft from the throttle body. I was attempting to get the bov closer when I recirced it and got rid of the 3000 pipe. I suppose, it should be able to handle 14 psi that far away.

[bgrieger]

Unless it's an appearance issue where you were looking for a cetain vibe, from a performance standpoint you'll likely never notice, nor will the engine. I've got a similar desire to put the BOV up there, but I have a little more flexibility in moving other things...

[SupraTuned]

Wow, that is an extremely nice build......I want my next engine to be done close to something like that....don't know how to do individucal coil packs though...But anyway, I always though it was best to get the bov to mount closest the the throttle plate so it vents faster....probably just a myth.. Thanks for the replies

[bgrieger]

It's not a myth, but 2 feet really isn't going to make any real difference. If you tried to mount it at the turbo you might see a bit of an issue.

The individual coils can be done with IS300 coils, though it is still batch fired, though a much cleaner install. Alternatively, as I did, you can use a standalone ECU.

[fst64_v8pwr]

Wow, very nice, thats good work

[SupraTuned]

Well, I ended up moving my bov back to its original location. I like it better there anyway. But yeah, your engine build looks superbly clean. I am a meticulous ocd type of guy with my car and engine too, I detail my engine/ engine bay and car almost every weekend. She has to be at her best! But my second build is going to be extremely polished, something like what you're doing. I don't know how complicated it would be, but would you be able to explain a basic install of those is300 coils? Can I use the stock ecu? I ended up going to the riemer route with a piggyback after trying the maft pro.