Here is my setup.

I need help syncronising the itb and balancing them. Can anyone please give me a quick run down!

Also would it be wise to plumb my own vacuum ports in the runners?

Another question. Besides welding what are my options to filling the injector bowls.

Thank you very much

 

for starters that plenum won't work. others have tried it with horrible results. with it's weak latch system and poor seal it will leak under boost. you need a plenum that's either a welded one piece or a two piece that bolts together with a positive seal. there will be so much pressure per square inch that even under low pressure levels you'll lift the plenum off.

it was designed for NA apps that need a cold air source or are space limited.

as far as the sync, you need 4 vacuum gauges to hook up to each nipple after the butterflies, then adjust the stops for each butterfly.. google synching motorcycle throttle bodies, same process.

also why weld up your only injector ports?

and you have to get a signal after the butterflies for things like your map sensor, bov, wastegate/boost controller, fpr, and brake booster or else they will never see vacuum... so you need to run a line from each runner after the butterfly to a vacuum canister. a block won't work since you'll have 4 signal inputs and not enough for everything else.

 

I'm doing a turbo ITB lsvtec and having a lot of experience with ITBs I can tell you that you need a different plenum, trust me.

 

Yeah that latch system looks like it belongs on a lunch box.

 

Plus that style plenum normally uses an open cell foam gasket between the upper and lower sections which will leak in the first place.

There will easily be over 1000 pounds of pressure acting on that upper plenum section under boost given it's surface area, more than enough to break the latch system, lift the plenum, and potentially break the carbon fibre

 

I'm sorry want boost but no one has this surge tank. The latch system is capable of holding 35psi on leak down testing. I have designed two seals. A crush foam and viton.

I know because I made it.

Please tell me what your talking about when it comes to syncing and setting the valves.

 

Also it's more like 3600 not 1000

 

Hmm, sounds like you did it right then. most commercial ones like that use cheap latches and open cell single gaskets.

I need one lol. I'm going to build a dual plenum manifold for my ITBs eventually but I need a plenum to get it running. wanna make another

just Google how to sync motorcycle ITBs. it's way easier than me trying to explain it without pictures and whatnot

 

Well the funny thing is I've read tons about it and it seems the obx piece is a clone of a Toyota itb iirc. One build I read showed a guy using feeler gauges to set the butterfly's and also when he dialed the wot he went so far past 90* and so one but no numbers where given. And the build wasn't finished so. I'm at a loss having read so much crap on this subject and honestly that's why I reached out to HT forums.

Yeah the latches on here now are perfect for NA setups and I'm keeping them for my own personal setup. I'm only goin to run 8-10psi. I have an alternate latch that's much stronger. Same as the toda carbon surge tank.

From my calculations the current latches pictured will elongate in the range of 15 psi there abouts. They are only stainless wire but they lock just fine an seal great!

 

Elongation is the first sign of failure. Granted they hold but vibration heat and pressure can do funny stuff. A bench stress isn't the same as a shake down by any means!!!

Thanks for your help this far. Care to fill me in exactly what you did? Before installing your setup?

 

Yes I'd be happy to make one for you. I made production molding and will offer them with two options for sealing and latching. Basically NA and high boost application. And mine will be significantly cheaper than the current market and sheet metal alternatives.

 

My setup still isn't in. I'm at the shop tearing our z06 road course car apart so I can't really talk.

I should hopefully be done in a few hours though.

I'd need a plenum that can support velocity stacks and 25-30psig religiously with lots of vibration and heat cycles since I'm building a dd/road course civic.

I'll message you when I get a chance to avoid cluttering this up

 

I'd love to make one for you! Btw I'm sitting in my c6 z06 checking the thread!

 

yea we got done this morning at like 5am... got a late start since we went over to help our friend do the first start up on his new built motor in his Lotus Exige S

Pulling the whole drivetrain in once piece, even on a lift sucks.

I'll try to find that sync video in a bit