Scott_Rst

Hey, was wondering what is (or if theres) any great benefits between a basic tubular manifold and the type that locates the turbo over the gearbox?
Any thoughts appreciated!

StephenC

AFAIK it just frees a bit of space up front for larger rad/intercooler.

jonny s2

iTrader: (12)

run cooler, maybe abit more responsive depending on the design

just like to add, standard manny's have been proven upto around the 400hp mark, with some porting

Scott_Rst

Cheers guys, after i posted started to think itd help cooling a bit! The engine is around 400hp on a standard manifold, just wanted a tubular due to the fact i think they look alot better

jonny s2

iTrader: (12)

what are you running cvh/zvh/zetec turbo?

Scott_Rst

Zvh mate,, although i havn't got it fitted yet, its si from sitechs engine that he had in his red s2

jonny s2

iTrader: (12)

has he taken it out of the camo 16i track car then?

Scott_Rst

Belive so,, was still in it when i agreed to buy engine box etc,, think he was planning on selling the 16i shell, not sure tho, hopefully get car to him in next month or so

jonny s2

iTrader: (12)

Awesome, have you got the complete setup from him then? engine,box,turbo, manny's

what management are you using?

you should maybe get a build thread p in resto room, sounds interesting

Scott_Rst

Yea mate complete set up,, itll be running haltech management,, keep meaning to start a build thread! I'll get one up at some stage

jonny s2

iTrader: (12)

great

il be running an over the gearbox inlet after i sort my other bits out, im just kinda enjoying it atm

jonny s2

iTrader: (12)

also if you use the exhaust manny which goes over the gearbox it will save your alternator LOL something which i had fried a month or so back but thats now been sorted

it would also be a good idea to remove the brake servo as you will find the turbo sitting close to the servo(not good)

muz

I don't know huge amounts about optimum manifold design etc but generally an over the box type manifold will allow the car to run cooler moving the turbo away from the rad and giving more room at the front of the bay.
However, as a trade off you get higher Exhaust Gas Temps IIRC as the gas spends longer in the headers and will also loose low down torque and responce but gain more torque towards to top of the rev range. As with everything it will be a trade off and compromise.

Scott_Rst

Haha, yea i fried a few starter motors on the various cvh's ive had in it due to heat, untill i wrapped the downpipe and put a heatsheild on starter!

muz

Tell me about it! Tubular maniold + 3 inch downpipe = poorly alternator



Gunna need my heat shield back on there.

Scott_Rst

Cheers for that mate

Scott_Rst

[QUOTE=muz;5640819]

Who made your manifold muz?

muz

Crazycage off here did it mate. They are based on a Nissan SR20DET manifold with a CVH head flange and T3 turbo flange welded on.

jonny s2

iTrader: (12)

haha Muz.....the joys of owning RST's

there are ups and downs of both standard and tubular, more turbo lag could be a problem with the over the box type manny, dependant on turbo spec etc...

like i said id be quite worried of the standard brake servo

jonny s2

iTrader: (12)

i think Gus has the rite idea, im sure he'll post

vroooom ptssssh

Well longer headers will help shift peak power up the rev range (longer inlet also needed to make the most of it)

Heat will be taken away from rad and IC as these are problems in rs turbos thats a good thing

You may lose thermal efficiency and will take longer to fill the longer mani before it spools the turbo (talking fractions here) so if you heat wrapped the manifold to keep the temperature up, that will help the turbo to spool up quicker again. (remember hot gasses expand more than cool ones, hot gass= more pressure = faster turbo spool up)

T28 RST

Gus's manifold

jonny s2

iTrader: (12)

AVA are the Daddys at making creations like that, i remember the other one too!

muz

Or just move the rad and cooler forward. I have looooooooads of room between the turbo and rad and running a T34.

gus

iTrader: (1)

dont bring me into this

gus

iTrader: (1)

for me the ava manifolds are just awesome

they seem to do exactly what they intended them to do

both of mine work very well

ava certainly knew what they were doing when they made them

only thing i have done is ceramic coat them inside and out

cabrst

Your old one D.....

I would allso go for the AVA ones if they wasn't so rare, just like the TT front setup..

But the "hansen" ones seams to be working ok..

gus

iTrader: (1)

to be honest there is a few available now that seem to soind the shizzle

crazycage, zetecboostboy, hansens to name a few
(in no particular order)

i just like both of the ones i have had from ava

vroooom ptssssh

If you're using a cossie turbo, you could also pulse seperate the manifold for even quicker spool up

CHRISP

got an AVA manifold and paid Ł450 for it cry: although it is a thing of beauty

Scott_Rst

Sorry mate i have no idea what pulse seperate means :/
its a gt30 itll be running

gus

iTrader: (1)

dude thats cheap from what they are new, if you can get one

jonny s2

iTrader: (12)

thats what i were thinking

CHRISP

cheers guys you've cheered me up no end

gus i think you've said before that one i have used to be yours at one time

gus

iTrader: (1)

yeah think so, im sure ava could count off top of their heads how many they made and who had them

whens it being fitted then

Scott_Rst

Anyone got any pics of said ava manifold?

T28 RST

Some here of my old car

https://passionford.com/forum/pictur...f-the-car.html

gus

iTrader: (1)

old one............


new one.............

T28 RST

Gus your new manifold will have a few people wondering where the turbo is

jonny s2

iTrader: (12)

XR3
















only kidding Gus, very trick pieces of kit them