155lee

iTrader: (10)

hi,i have a 2wd sapphire with a 4x4 engine and turbo.the exhaust manifold is 4x4.i want to fit the 2wd manifold to it as its better for more power i have heard?
im not sure what exhaust is on my car,2wd or 4x4.its a nearly new twin pipe magnex system and i dont want to have to buy another 1.if i change manifolds will my existing exhaust fit the onto the back of the turbo the same or will i need to get a 2wd exhaust?
cheers,lee

botters

iTrader: (2)

the system will fit fine 4x4 manifold is really good for turbo response and will only limit power above around 400 bhp

155lee

iTrader: (10)

is it?when i built the engine on my last 2wd saph i was told to use the 2wd exh manifold and 4x4 inlet manifold.

botters

iTrader: (2)

opinions vary mate but the shorter primarys on the 4x4 manifold increase spool up time of the turbo, and i have seen with my own eyes 380bhp+ cars with 4x4 manifolds on.
the 2wd manifold is more popular tho for some reason even in lower powered cars, i myself run the 4x4 manifold as they dont tend to pull exhaust studs out and dont need a damper unless your running a huuuuge turbo lol!

botters

iTrader: (2)

oh and 4x4 inlet is much better than 2wd its got a better shaped neck on it and is a fair bit bigger as well

155lee

iTrader: (10)

whats a huge turbo?a t38 or something?i plan a t34 with a .63 exh housing.that isnt going to be a problem?
if theres not much in it then ill stick with my manifold and exhaust,that will save me some ££££

botters

iTrader: (2)

i meant like a t4 or something along those lines
a t34 will be fine with 4x4 mani i would have thought, escos have a very similar turbo as standard and use these manifolds

botters

iTrader: (2)

oh and what power you aiming for? i know a few people swapping thier .63 housings for the smaller .48(i think its 48) housings to lose a bit of lag, allthough lag shouldnt be a problem if mapped properly

155lee

iTrader: (10)

dunno.was reading that 380bhp msd conversion thread earlier.seems good value.that uses the .63 housing.then i read somewhere that harvey gibbs uses the .48 and light blues for his 380 conversions.im in no hurry,just seeing whats out there as im sorting out what i have just now so its good to know the 4x4 manifold will do the numbers if need be.

tabetha

As said the 4wd with shorter primarys would be a much better bet, as well as improving access around the engine that side, under 450 this is what I'd have.
A 380 conversion on a .48 will make a much nicer everyday driving car than a laggier .63, doesn't matter about the mapping a .63 will give more lag due to pure physics, but a live map as opposed to a chip will literally transform any car, may not make more power outright but the sheer driveability will be so so much better.
A 380 .48 conversion will be faster in most situtations than a laggy set up like a .63 apart from above a certain point that you'd rarely use in everyday driving.
tabetha

155lee

iTrader: (10)

it would be mostly for everyday,the 1/4 mile on the rare occasion i go down.dont do track days with it so just something useable and powerful would be good.

charlie luciano

iTrader: (3)

The 2wd exhaust manifold has a better top end flow rate, you need one if you are planning to fit a monster turbo as you will need the clearance, eg:a gt30 can not be fitted with a 4x4 exh manifold the turbo would foul the cylinder head

Luciano

col93saphcos

iTrader: (2)

im on .48 housing t34 on 4x4 with 4x4 manifold,siemens,32 psi,msd off shelf chip,seems nippy enough,
was daily driver never had any probs,

colin

BIG WULL

iTrader: (5)

yeah i bought your 2wd manifold off your old car Lee, for my build. I had plans for external wastegate etc so it was required. Change of spec now since its remaining a road car but i'll still use the manifold for a t38

155lee

iTrader: (10)

you have it do you,its a pain doing this all over again as i sold all my goodies ast year and now im building another 1 and having to buy some of the bits again and having to pay more.not going mad with this 1,more power and standardish looks,rouse spoiler and rs500 splitter,thats it.

J1mbo

iTrader: (1)

4x4 manifold we change after 450 hp as they get restorative we have seen over 700 on a 2wd one with external waste gate mod.

I will run a 2wd one on my car as its 2wd so it should have the original manifold even if it won't be as good as a 4x4 at my power level !

BIG WULL

iTrader: (5)

hope it turns out even half as good as your old one