turbo manifold

15th January 2009, 00:32

I have seen a few people run their turbo conversions with the standard manifold cut down and adapted to bolt the turbo on the bottom.
Iv been thinking of doing this for a few reasons;
-Cheaper than the dp manifold
-Its cast iron i think so should prove pretty strong and wont crack
-For the power im aiming for, i shudnt see too much of a disadvantage with it not being equal length

So, where can do this adaption?
Can it be done to house any turbo?
How will it be done so that the turbo sits at the right angle so that it doesnt start burning oil?

Any info on this method much appreciated.

Alex

15th January 2009, 08:38

For the VTS its a bit of a pain. You actually have to cut the end off the manifold and weld on a hole new plate. You have to heat the hole manifold up so its glowing cherry read and then using iron rods weld the new flange on. Then a nifty bit of porting can help. On the VTR its a bit simpler where the last one I did was just cut down a down pipe and welded it on to that. Trick is to get the turbo high enough as it has to be above the oil return.

If you cant weld your self Cituning/Prima do a perfectly good manifold for around £200. It works perfectly well and is a sensible price.

15th January 2009, 10:07

is the cituning manifold any good? obviously not best for performance but is it build well and can it be used with a gt25?

15th January 2009, 10:09

dont turbo cars what arent meant to be turbo'd unless you get forged pistons for it.. i've blown my std pistons up 3 times in 2 months...

15th January 2009, 10:47

Quote:

Originally Posted by saxova

dont turbo cars what arent meant to be turbo'd unless you get forged pistons for it.. i've blown my std pistons up 3 times in 2 months...

You are doing something very wrong then. The standard internals can take a lot of stick and many people run boost with no problems on stock internals. Just keep it sensible and there is no reason you should have any problems.

15th January 2009, 14:02

Quote:

Originally Posted by saxova

dont turbo cars what arent meant to be turbo'd unless you get forged pistons for it.. i've blown my std pistons up 3 times in 2 months...

that wasnt what i asked...
of course il be using forged pistons but im wanting information on a manifold at the minute.

AX- do you know anything about the cituning manifold? such as, can it be used with a gt25, is the angle right for oil flow in the turbo? is it durable?
Thanks

15th January 2009, 14:59

Never used one to be honest but plenty of people have and never heard of one failing. The position the turbo high and flat so that's all good. Don't know if it can fit a GT25 as its designed for smaller turbos. May fit, best to ask them and see what they have to say. Si aka vtsTurbo is selling his full PD setup. May be worth giving him a call if your after cheap parts.

15th January 2009, 15:08

forged internals and a cut down manifold

15th January 2009, 15:29

Quote:

Originally Posted by don55

forged internals and a cut down manifold

a lot of people i know with turbo cars prefer a cast iron manifold as appose to a tubular stainless one as they appear to crack over time.
Im not trying to cut corners, just want to make everything strong as possible.

Thanks for the info AX, il give cituning a ring if i decide not to use an adapted standard one.

15th January 2009, 21:18

im pretty sure the turbo that cituning is the gt17, what power flow is this capable of?

15th January 2009, 22:33

Quote:

Originally Posted by wrighty89

a lot of people i know with turbo cars prefer a cast iron manifold as appose to a tubular stainless one as they appear to crack over time.
Im not trying to cut corners, just want to make everything strong as possible.

Thanks for the info AX, il give cituning a ring if i decide not to use an adapted standard one.

If they're made from the correct grade of steel then they won't crack...

Quote:

Originally Posted by saxova

dont turbo cars what arent meant to be turbo'd unless you get forged pistons for it.. i've blown my std pistons up 3 times in 2 months...

Sounds like a poor map, I would guess too little fuel top end. My old VTR turbo ran for over a year with a double headgasket to lower compression and stock internals, it made 160bhp and 260NM torque

Edit: I should add that it did have a few other bits done, i.e. the cylinder head had been reworked by GMC and it had a Piper 260 cam.