your thoughts/advice on manifold build por favor

[nc30pete]

made a little progress on the death sled yesters, and was just wondering the best sort of configuration to set the tubes ive got onto the flange. In terms of best performance / flow whats the best . I have sketched two setups , what one is better ( or hardly any difference ) Its only a small garret turbo , not sure which one .









As you can see space is somewhat of a commodity.... may have to section away a bit of the bulkhead to get the exhaust out down the side of the box if im to use the reccommended 3" size pipe .

I had to add an extra u/j in the steering to get me the few extra cm\'s to run a better tubing route from the block , none of it is fully welded in yet etc , the bracked holding the rose joint is just tacked on till im 100% happy with it nor is the small bit of steering rod i had turned down the bridge the gap between the 2 u/j\'s

ive read somewhere thats its not a good idea to heat wrap stainless steel as it promotes cracking/fatigue? If so i guess i better form some sort of heat shield , around the u/j area and in between the l.i.m to reflect heat away from the charged side. Will be re routing brake pipes too just in case anyone was thinking that lol

Any input no matter how small , even if you peeps think ive overlooked anything etc is appreciated

[clive]

Pete you need to wrap the uj with good exhaust tape

Also if you are starting from scratch and don\'t have the Turbo yet, why not come up and forward and fit a real good Turbo like a GT35 as you will only get a baby like the Greddy kit has to sit down below.

Good to see your on some good thick wall tube

[shifty biscuits]

whats the id on that bend? looks a healthy diameter.
so is the new tub not twin scroll? in all honesty i would run 2 branches in parallel to the turbo flange, in your case thats probably not gonna work due to the diameter?
i would make a y piece from the flange into a single tube. if you have 2 90\'s from the block flange leaning towards each other keeping the length equal. if that makes any sense at all lol.
 
thats what im planning to do. i have a holset from a mate but its massive, im thinking of locating it forward of the brake servo by the shock turret

[nc30pete]

internal diameter is about 54mm and its 3mm thick. I already have a garret turbo which the original owner fitted ( it was an akward setup ran forward, then across the front crank pulley and out through the front bumper via a cereal packet sized home brew silencer ) , when it was on and i got it running right it was plenty quick enough but tbh as it was only on base map i didnt go past 4.5k . It may run out of chuff to early in the rev range ...

kinda get what you mean shifty :-) no its not a twin scroll, im guessing as these motors devour exhaust gases thats the best type of blower to use? ( can see more expense coming... ) i plan on putting the turbo in the area where the a/c compressor was sitting tio give me the best post turbo exh route to go down bulkhead and past primary tubes

[Grant Monkhouse]

Here\'s what I did for my manifold. All you need to do to make it fit for you is use a 90* upwards:) don\'t worry about running a divided manifold, it makes it harder to fabricate WG pipes

I have one massive 60mm Tial WG on my manifold

[shifty biscuits]

they mandrel bends? look like 1.5mm wall? tidy set up there. i had not considered having the tub there... hmmmm

[shifty biscuits]

is there any drawback from over specing the wastegate? ie. if i run a small turbo now but run a 50mm gate for future tuning are there any issues it could throw up?

[nc30pete]

grant, where your wastegate is situated is where i\'d need to have the exhaust side of the blower facing and run parallel and above the primary pipes , i dont have the outward space to make the pipes run from the block flange out adjacent to each other . my car is only 1.5m wide ! ( think that was the jap k-class rules )

[nc30pete]

im interested how that setup works even on an fd, the exh side os facing the o/s/f wheel / chassis right?

[Grant Monkhouse]

im interested how that setup works even on an fd, the exh side os facing the o/s/f wheel / chassis right?

It\'s not for an fd, it\'s for an rx4:D partly mounted that way for looks, but for spacing and to fit über loud side exit exhaust for santa pod:Thumbsup!:evillaugh:evillaugh

[Grant Monkhouse]

Mounted just like that:)

[Grant Monkhouse]

is there any drawback from over specing the wastegate? ie. if i run a small turbo now but run a 50mm gate for future tuning are there any issues it could throw up?

No AFAIK, they all work the same. Bigger is better IMO,

[nc30pete]

thats how my original setup ran except hot / cold side vice versa

[Grant Monkhouse]

grant, where your wastegate is situated is where i\'d need to have the exhaust side of the blower facing and run parallel and above the primary pipes , i dont have the outward space to make the pipes run from the block flange out adjacent to each other . my car is only 1.5m wide ! ( think that was the jap k-class rules )

If you turn the manifold up 90 degrees and mount the turbo conventionally then you can place the WG ina different position, I put mine there to access it easily and because it looks to great to hide away under the car and get covered in crap off the road:)

[nc30pete]

where i plan to mount the turby, a fraction further forward by bout 30-50mm

gives you an idea of my lack of space with the micro machine