FFIM info wanted,design,idea's,opinion's

[tsuper92]

i bought myself a manifold for my car.it is a cheap china veilside replica,kinda like most people make and sell.i bought this particular one because it's two piece design.which i figured would make it easier to modify to fit in my car.there isn't anybody making these to bolt up to a 2jz in a mkIII,that i'm aware of anyway's.alot of the known company's out there making these sell for three time's the money(sp,vw,etc).i can't justify spending that money to cut them up and mod. to fit in the mkIII's skinnier chassis.if i wreck this manifold it wouldn't make me mad at myself,like screwing up a nice one.

allright i'll get to the point of the thread and stop rambling on.

i almost had a shit when i pulled it out of the box and seen it's size.it look's like it will be a little harder then i thought to fit,not to mention it's heavy.the whole manifold is cast aluminum except the tb,which appears to be machined.

here's a pic of the fat bastard

you can see in the pic's how the two half's bolt together.i'm planning on cutting the tank down a little,maybe a good inch.i'm going to have the upper welded back to the lower runner's,because the thread's will be gone.

which bring's me too a couple of question's,maybe some of the more knowledgable member's could help me with(ian,ron r,seth).
this thing has velocity stack's in it and i'm not sure if they should get cut off.the stack's do stick into the plenum a good amount,as seen in the pic's.it will be easy to cut them off and round off the top of the runner's,if that would be better.i'm just scared cutting the plenum down will make it more turbulant inside with the stack's in there.

feel free to post opinion's on this.any help is much appreciated.

 

[jdub]

Wrong section for a 2JZ...thread moved.

 

[tsuper92]

sorry jdub.i decided to put it there because 7m guy's make more manifolds then jz guy's.all the threads i've read were in the 7m section.after reading many post's from yourself and ian,make's me want to cut the stack's off and round off the top of the runner's.i'm just scared of losing all my bottom end due to the 4.4L plenum.i'm using a gt4088 on the motor with stock cam's and might not be able to take advantage of the plenum volume.

you can delete the thread,if you want.probably a waste of bandwith,seeing not many mkIII jz guy's look to swap out the stocker

 

[suprahero]

Have you sent Ron Ramirez a pm to see if he's willing to help you? He's building some 2jz manifolds and I've heard he's one of the best. Good luck.

 

[tsuper92]

i know ron built a 2j mani. for himself,but haven't heard of any other's.he is the only one that i've seen build one to fit a 2j mkIII.i haven't even seen a post from him in a long time.i figured he was laying low and not bothering with the forum's.i would have jumped at the chance though.i even have a spare lower runner.

i ended up cutting the velocity stack's off this mani and put a radius on the end of the runner's.i'm going to pull my stock plenum off today,that is if i get the wood stove going.
i'd like to get an idea of how much work it take's to get this thing on.maybe get it to the welder on monday.

 

[Rennat]

ron was taking orders not that long ago... go find his thread in the misc vendors section.

 

[tsuper92]

^^^thanks.i'm on the forum every day.i just don't think to go there,even though i check the GB section and fs section

 

[suprahero]

He's definately building them. I think they're like 900.00 but I could be wrong. Good luck.

 

[IJ.]

All depends on what you're trying to make the engine do TSup.

Lengths/Volumes affect how the engine will make it's power on a given turbo.

 

[tsuper92]

i should have pm'd ron.his stuff is a work of art compared to what mine will look like when it's done.

IJ.it's a stock block 2j(cams too) with a gt4088 A/R.96.i'm trying to get rid of some volume,i don't want to lose all my torque.i've allready cut the plenum down some and ordered some aluminum for a base plate.the base plate will make the runner's another half inch longer.i've decided to do this after trying to bolt it up yesterday.so cleaning up the runner's was a wsate of time,because now i'm going to do the same with the 1/2" plate.it hit's the brake booster,so some modification was needed anyway's.
what do you think of the manifold design?the runner's are 2" by 2" before they taper into the head.maybe toss the plenum in the garbage all together and make another?i might still keep the manifold a two piece design.if it doesn't work out,maybe ron could build off the lower.i'm just worried about starving the further cylinder's of air

the plenum cut up

 

[tsuper92]

alot of trial and error to mount this thing up.i ended up un-wrapping alot of the harness to get it to sit under the runner's.i'll need to extend the cam position sensor wire's a good amount.i also needed to mod my fuel rail mount's ,because the injector's are at a different angle going into the runner's.the rail will almost sit on top of the plenum once bolted up.if all goes as planned changing injector's will be a 10 minute affair.changing the top feed injector's with the stock manifold is a complete nightmare.

 

[Gritz]

Whats's the reason for the intake upgrade. i thought guys put down 800+ with the stocker?? Are you going for a 1000hp?

 

[IJ.]

Short runners = power band shifts higher up the rev range

Long runners moves it down.

Large plenum volume softens the hit as it comes on full boost

Small volume makes it hit harder.

These are just the basics I've found in testing combinations of each from 40mm long runners to full length stock style runners and from a 2 litre plenum to a 6.5 litre one.

There's no real way to tell how a particular combination will work without building and testing it in the real world.

 

[Rennat]

Whats's the reason for the intake upgrade. i thought guys put down 800+ with the stocker?? Are you going for a 1000hp?

i know for the 7m engine, just modifying the stock intake manifold into a FFIM, sethron picked up power & torque. JUST from that... and he wasnt crazy with the mods either... so it just makes more power over stock.

 

[tsuper92]

Whats's the reason for the intake upgrade. i thought guys put down 800+ with the stocker?? Are you going for a 1000hp?

clean up the engine bay,make it easier to get at the injector's.i'll be able to pull my injector's in minute's.the whole iintake plenum can be removed alot quicker then the hour's it take's for the stocker.once i'm happy with my set-up under the hood,it will be time for paint.then i'll have to find something else to do to pass the time away:biglaugh:

car has a gt40 turbo,never gonna see huge #'s with that

 

[tsuper92]

here's the q45 to go on the intake.i cleaned it up and cut off the idle up valve.i need to find a tps addapter for it

 

[tsuper92]

i finished my base plate for my plenum,guess that's what you could call it.i should have it all mocked up and hopefully get it all welded together.
i also had to cut the tb flange off.the company who built it clocked it wrong,china quality control ftw.i'm just not sure i want to weld it back on,maybe ditch the q45.
anybody have any experance with aftermarket tb's,like accufab?i'm open for suggestion's on them.it would be nice to find one thats easy to use,as far as tps.

here's a pic of the lower runner with the 1/2" 6065 plate bolted on.