18 replies to this topic

[JA1987]

Just wondering what sort of spec engine I would be looking at to produce this sort of
power? I would want to run a T2 turbo with custom manifold, would the turbo be ok for
this kind of power? Also what sort of price would I be looking at to build a 120-130bhp metro
turbo engine?
Cheers

[Miniwilliams]

That Turbo would be MORE then good enough for that power, as for the spec, you wouldn't need nothing to special IMO I straight cut cut box and drop gears are always a good bet with a turbo.

A standard Metro turbo engine with a lower C/R head will be good enough for what your after.

MW

[JA1987]

I was thning of a T2 turbo on custom stainless manifold, fast road cam, and race gaskets
(copper)dont know what head tho? What would need to be done to the head?
Would straight cut gears be necessary? How about an LSD?
Cheers

[daniel_johno]

I was thning of a T2 turbo on custom stainless manifold, fast road cam, and race gaskets
(copper)dont know what head tho? What would need to be done to the head?
Would straight cut gears be necessary? How about an LSD?
Cheers

I think standard good quality gaskets would be suffice to be honest.
For a cam you'll find almost everyone will point you in the direction of the Avonbar Phase 2 turbo cam, which is very similar to the 266 and standard MG metro (not turbo) cam, but has a few extra benefits for a turbocharged engine. Oh and dont forget a turbo oil pump!!
As for a head, for the sort of power you are looking at Morspeeds Stage 2 turbo head would be ideal and is very competetively priced at £150-£200 (cant remember exactly what it costs)
You shouldnt need an LSD at that sort of power i wouldnt imagine but a twin pin diff or at tthe very least a hardened diff pin will be needed.
I cant afford to run a s/c gear box so i am just rebuilding my helical box, although in an ideal world i would have them.

Good luck with the build

Dan

[Wil_h]

I think standard good quality gaskets would be suffice to be honest.
For a cam you'll find almost everyone will point you in the direction of the Avonbar Phase 2 turbo cam, which is very similar to the 266 and standard MG metro (not turbo) cam, but has a few extra benefits for a turbocharged engine. Oh and dont forget a turbo oil pump!!
As for a head, for the sort of power you are looking at Morspeeds Stage 2 turbo head would be ideal and is very competetively priced at £150-£200 (cant remember exactly what it costs)
You shouldnt need an LSD at that sort of power i wouldnt imagine but a twin pin diff or at tthe very least a hardened diff pin will be needed.
I cant afford to run a s/c gear box so i am just rebuilding my helical box, although in an ideal world i would have them.

Good luck with the build

Dan

Pretty much agree with all of that, the hellical box will be fine, it's just the ratios are a bit C**p. With 130bhp you'll be verging on the limit of the hellical drops, but if in good condition they'll last long enough.

I wouldn't bother making your own manifod either, too many people have tried and failed. Unless you know a lot about the subject it's best to buy the Mirage Motorsport one or use the metro one.

Wil

[mighty_mini]

When you say people have failed with making manifolds, do you know what problems were invloved?

[Wil_h]

The problem is always that they crack owing to the massive ammounts of heat and expansion involved.

Of course it's possible, but don't expect to get it right first time. i don't expect Mirage or Jan Speed (or even Austin Rover) did.

[josh_tacon]

couldnt u water cool the manifold with a water jacket or somthing?

has anyone tryed this?

cheers
josh

[daniel_johno]

would making your own manifold not have an effect on the air flow however? as wihout a flow bench id imagine it would be quite difficult to optimise a manifold deign for greatest airflow...... or i may just be talkin rubbish.

Also if you dont want to cut your bulkhead fit the mirage manifold kit with T2 turbo as the metro turbo manifold and T3 turbo will not fit without bulkhead modifications.

Dan

[Wil_h]

couldnt u water cool the manifold with a water jacket or somthing?

has anyone tryed this?

cheers
josh

What's that saying about cracking an egg? are you insane, do you know how hot they get?

would making your own manifold not have an effect on the air flow however? as wihout a flow bench id imagine it would be quite difficult to optimise a manifold deign for greatest airflow...... or i may just be talkin rubbish.


Dan

A good manifold design will of course reep rewards, however it is less important on a turbocharged car. Look at the Mirage manifold for instance, it has been shown to give good power, but it is a poor design as far as flow goes.

[mighty_mini]

Today ive been trying to make a manifold, spent 4hrs on it. All the parts were from a maniflow LCB. THis was mainly due to the fact that the centre branch was in the perfect position for my TD02.

Ive got a long way to go, and a short time to get there *ahem - smokey and the banit in my head now* but we'll see.

The welding is very shocking, id rather it not crack but it was a bit of a pig to weld as its been sat outside for so long.


Heres a couple of pics, like will said its prob not gonna be right first time. but you dont know till you try! Ive still got the T3 as backup Its also alot easier when you have a spare engine to use as the mock up










Dave

[Yeti]

On the manifold front, Seven Enterprises used to do a kit that had a log type manifold, they did this on purpose (well maybe it was a happy accident) to promote turbulance after the turbo because it used a suck through set up, not a blow though......


Hey Mighty Mini, who cares what it look likes as long as it can take a beasting with a hammer (not an engineering practise common to anyone other than me) or you could use exhaust rap, keep everything else nice and cool..... cooler at least.



Yeti

[Turbo Phil]

Dave. you'll really struggle to keep it from cracking using mild steel, believe me. You ideally need to use a decent grade of stainless and fit some type of "bellows" to allow the pipes to expand and contract.

Fitting an exhaust wrap will not keep things cooler, infact it will do just the opposite.

Phil.

[mighty_mini]

HI phil..


i have been thinking about this while i was at work, and im scrapping the above manifold as of what i read on your posts @ turbomini's.


Im currently stuck, and might need some inspiration on how to manufacture a decent maifold for my TD02 Turbo. Any suggestions? I was going to look around for someone to help fabricate a manifold for it, as im sure its worth paying for if its just going to crack.


Not long to build an engine and get it run in for BH2N, so im really pushing for ideas.


I saw mini1071's janspeed style setup and would like to do that idea. but my turbo is a litytle awkward shaped.




Dave

[Wil_h]

My plan is to use a metro manifold then make a pipe from that to over the clutch housing. To do this though you will need to bin the turbo elbow and make your own.