zbrown

haha..... yeah i was going to use ITB's but i would of had to to do something similar to what i have done now.... to tie the two runners into one for the intercooler piping. So i just went the simpler way like this here.

Those ITB's that anewconvert posted are a very nice peice..... but out of this guys league which = poor college kid

Yeah i was wondering about a plenum/surge tank...... I've read that the stock s4/s5 one is too large.... and the stock fd upper looks like it has little to no surge tank... more like just straight runners after the TB.

I could add more between the 2 runners and TB if that would help things?

Ha... and yes this upper weighs a fraction of what a stock upper weighs,

zbrown

well progress from today, thanks to no school today

i built a bracket to support the turbo and am going to build the manifold out of sched 10 instead of sched 40..... i can stand on the support and it is solid as a rock.... kinda overkill but it is very strong and looks nice


um also got one hard coolant line done.... turned out well as you can see... and the lower is tacked up and almost done


cut down and rewelded the fillet tube also

shold have the manifold mocked by tommorrow..... and have a throttle body to finish the intake manifold hopefully

and got some SS line and fittings for the clutch plumbing today

some pics of the bracket... sorry for the shitty pics... dont know why they didnt focus









turbo mounted in its final resting spot...









and some of the coolant piping









thats all for today

NZ_87_TURBO

what a fkn monster!!!!!!!!!!!

Arron, i have to ask, youve posted onthe thread more than once, you know its here, why dont you just add it your self?

88rxn/a

iTrader: (6)

christ that turbo looks .......HUGE!!

yusoslo

I'm curious if the hood will close with that turbo mounting position.

Also I want to see how you mount the throttle body to this custom IM. Also Rotaries tend to have a large volume chamber inbetween the T.B. and the intake penlums. Do you think this will be a problem??

RX-Heven

iTrader: (1)

I did not know that Racing Beat made a Weber intake for the REW, I thought they were only for earlier 13b's with the smaller ports.

Also, fwiw, a surge tank is part of the fuel system, basically a second smaller fuel cell used to prevent pump starvation. A plenum is what is between the runners and throttle body. Also, you should really reconsider your design of that part as AaronCake suggested.

Also, why the crazy position of the turbo?

Kickass project btw.

NOPR

this thread makes me want to learn how to tig weld. really badly. the turbo support is very nice, and i cant wait to see what you do with the exhaust manifold.

PSiedTSi

Have him replicate it for you? I'm sure anything can be bought.


Looks good!

zbrown

lol ... thanks for correcting my crazy thinking of the surge tank.... i thought the two were one and the same

Yes i thought RB only made a webber style manifold for early 13bs, as it shows on the website. but i called and wanted and asked if they had a 4 bolt holley type one for an rew and didnt but have the webber style instead, so i went with it


seriously when i look at an FD upper there looks to be alot less volume between the TB and runners than what i have..... and most of the aftermarket stuff there is less yet and are overall have shorter runners.

It should run if nothing else.... and flow alot less restriced than a stocker at higher
power levels, yes i am going to lose some bottom end but top end should better
and it can always be done again



I went with this mounting position becasue i want some fairly long exhaust runners and i just dont like stuff crammed in there.... i want alot of room to work with on the wastegates and all the plumbing. where the turbo sits i also could make the solid and attractive mount like i did easier than other spots

good eye on it clearing the hood.... the comp. sits a hair above, but i am going to do some sort of a cut out snout intake on the hood..... alot will think it is lame or just foolish but that has been one of my desires for along time.... btw my hood already is hacked up because of when i cut a hole to run the stock TMIC on my NA hood long ago, so dont feel so bad


and NOPR.... id say watch out if you learn to TIG, you will have an itch from hell to make things and it is not easily satisfied

RX-Heven

iTrader: (1)

It appears as if your hard radiator tubing contains the highest point in the system. This will wreak havoc on attempts to eliminate all the air from your coolant sysytem. I'd suggest installing a second radiator cap on the tubing at it's highest point or installing an ast.

spot_skater

+1

And BAD EFFING CAR, Z. I can't wait to see it finished. Great work. Mucho props, brotha. Curious to who you are going to have tune this beast, as well...

James

PSiedTSi

I think I heard him say something about DB Performance in Minneapolis.

kabooski

nice kick *** project! you got some mad fab skills

makes my current project look subpar in comparison

Jager

iTrader: (10)

I want a ride!

zbrown

good call... i thought about that as it was finished painting... i am retarded

good eve, ill prolly just weld in a plug to remove the air and add the last little bit of coolant....

that should work correct mr RX-Heven? or no

zbrown

Ha, thanks guys for the compliments.

anyway, the shops fabricator (Matt) mocked up most of the manifold today, till we ran out of shielding gas.... He has more experience working with piping and it is what he does for a living so

The front runner is all tacked up ready to go, and the rear needs just some tweaking and a couple of tacks and it will be ready to go.

We tried to get close to equal length runners and they ended up very very close to equal........ right at about 18", which is the # i was shooting for.

It will be welded fully tommorrow and the waste gate work should be done aswell.

Couldn't help myself today and cranked it over for a sec to hear the lump---lump---lump of compression

and for the manifold it comes off easily with the bracket and all attached.... and the turbo is going to go no where, and that is a fact for sure (Y)

here is some of the front runner ready to go







and here is some with the rear as well.... this is not fully tacked yet and needs some tweaking.

peachykeenwight

Man, that's gorgeous. I can't wait to see it all together and running.

forkjar

trudat. this thing is freekin sick

sub9lulu

iTrader: (7)

that manifold is just simply ... straight forward
good god
oh wheres the wastegate

Ottoman

wicked build!

What RPM will a turbo like that spool on a 2 rotor

are u gonna use a nitrous spool up kit?

cuz i've seen 2JZ's and RB's really struggling without nitrous off the line...

not trying to be mean...just curious...

Aaron Cake

iTrader: (1)

I tend not to do stuff like that without asking the permission of the original poster, and my description may not be what the original poster wants...

That's true, but FDs also have a ridiculous turbo system designed around maximizing the powerband. I bet that has something to do with the smaller plenum.

Sounds like our tastes are quite similar. My next RX-7 will have throttle bodies coming out of the hood with velocity stacks...There's something just plain cool about seeing machinery come through the sheet metal, watching it pulse and rocket with the engine, etc.

Yeah...The real issue is then getting the damn equipment...I still have an problem with spending $3000 on something that will only be used twice a month...Luckily a local welding shop here rents TIG equipment for very reasonable rates.

That manifold is looking great, but you need more straight area after the exhaust ports. Putting bends directly at the flange creates a restriction for gasses that wan to go straight.

RX-Heven

iTrader: (1)

The highest point of the system should be used as the fill spot so as long as your plug is large enough to pour coolant into, then it would work just fine. However, if you wanted to just put in a 1/4" or so plug, I would recommend against that.

PSiedTSi

Hmm?

adrock3217

Ok, maybe you noticed the confined areas those turbo manifolds will be in. Now, you tell me, especially looking at the last one. If you were to add more of a straight section at the head, how would you be able to smoothly curve it up to the turbo flange? YOU WOULDN'T.

Don't try to undermine people on this forum with pictures of manifold for the confined engine compartments of front-wheel drive four and six cylinders. OK? THANKS!

FC3S.USD

iTrader: (2)

Very impressive fab skills, And project looks killer.