My New Custom Manifold For Turbo...

[lahondal 17]

Hi all.

 

What do you think about my new custom manifold? I hope will fit without modifying the bulkhead....

 

 

 

 

 

The turbo is from an Iveco 3.0, i think is well suited to the engine, slightly larger than original and i think the standard manifold is easy to outperform, althought mine is a very simple design.

 

Opinions please!!!

Edited January 28, 2016 by lahondal

[opticaltrigger 52]

Hey,Iahondal.

 

It's great, I think it will work really well.

I don't think turbos worry to much about the manifold shape really, especially on a short run like yours and into a collector.

 

All the best

O.T.

[aarontrophy 26]

Looks really good and interesting at the same time. Can't wait to see picture when in the car

[Tom Fenton 1,542]

It looks ok to me, but won't it be very close to the firewall?

Only thing I would have done differently would be make the centre two branches curvy to equalise length with the outers. But I'm sure yours will work fine. Will the bonnet shut next question!

[lahondal 17]

I think i have a few centimeters to the firewall, but who knows for sure hehe.

 

I had done an easy job, its my first manifold, and a "equal lenght runner manifold" is a lot more difficult and the objetive was only upgrade de std unit.

 

Only thing i am worried about is the runner diameter, which are 38mm ID, and maybe are a little bigger than ideal, i hope turbo spool up will not be affected.

 

And the bonnet.....i dont know if will fit...anyway is a fiberglass unit, a copy of an "uk auto bonnet", so minimum i will have to isolate it or make a hole near the turbo zone.

[Paul_13 212 1 Cars]

Is that turbo off a diesel or petrol 3 litre

[lahondal 17]

Some pics of the rest of the project!

 

 

 

 

 

 

Thanks!

Is that turbo off a diesel or petrol 3 litre

Diesel 3 liter.

[Anthony 1,003]

I might be wrong but don't diesel turbochargers tend not to fair very well with the high EGT on petrol turbo engines?

 

Manifold looks very good to my untrained eye for a first attempt though!

[lahondal 17]

I might be wrong but don't diesel turbochargers tend not to fair very well with the high EGT on petrol turbo engines?

 

Manifold looks very good to my untrained eye for a first attempt though!

You are right, in theory petrol EGTs are a problem with diesel turbos.

 

Anyway, i have a friend who haves a mercedes atego turbocharger in a 2.0 16v kadett, and racing it in hillclimbs, no problems yet.

 

Fingers crossed.

[Spesh 31 1 Cars]

Do you have a picture of inside the collector?

 

 

I think you'll be ok with 38mm runners given that they are rather short, I would suggest heat wrapping to help improve the gas speed but you would then add (slightly) to the risk of the exhaust housing not coping with the EGT's of a petrol engine. I think most of the knowledge of diesel turbos not coping comes from the very large holset turbos and garett variable geometry ones so you may well be ok

 

Perhaps an EGT gauge would be a good idea, with you collector 'box' it would be quite easy to tap the temp probe into it.

 

 

 

Edit - I have no idea really but wont those bottom arms suffer flex as they flat plate?

Edited January 30, 2016 by Spesh

[welshpug 1,661]

The lower arms look much like the compbrake ones that are known to bend.

[lahondal 17]

Lower arms are my own design. No bending problems yet, i think because they are wider than compbrake ones. I did it my best.

 

Do you think heat wrapping worth?

[opticaltrigger 52]

Hi Iahondal,

I think heat wraping is a good idea to for the reasons that Spesh said above.

Everything will be better with heat wrap.Under bonnet temperatures will be lower and spool will be faster.A turbo blanket is a good idea to.

We used two layers without a break on our pipe and over laid it with with a weave of stainless steel mig wire to stop it from coming loose with expansion and contraction of the tube.

It was a diesel turbo to like yours and we didn't have any problems with EGT's and with a blanket as well.

 

All the best

0.T.

 

Edited January 31, 2016 by opticaltrigger

[petert 588]

Nice work. I think I would have made it twin scroll however, given the opportunity.

 

I'd also take the opportunity to add some stiffening ribs to the front arms. Otherwise they'll fold up in the vertical plane.

Edited February 1, 2016 by petert

[wicked 103 3 Cars]

Don't forget to put a piece of flex pipe in your exhaust at the rigth place behind the engine. Otherwise the exhaust will put a lot of force on your manifold and make it crack.

Just make sketch how your engine / topmounted turbo rotates in the bay and look at the exhaust.

 

And mount a second fan...

 

Keep up the good work!

[lahondal 17]

I planned to fit a compensator instead of a flex pipe, im totally focused in reliability, and i have doubts in this point. What type will be more reliable? I have little problems with flex pipes in the past (maybe because the exhaust is not properly suspended).

 

The turbo is bolted to the cam cover for discharging the turbo weight to the manifold.

 

And second fan i hope will not be neccesary, previous cars i had, run very very well without the plastic fan cover, its true that they wasnt be turbo engines, but i raced in 32+ celsius hillclimb, and the fan only engaged at finish line. So, i will try like it is.

Edited February 1, 2016 by lahondal

[wicked 103 3 Cars]

I have no problems with the flex pipe; it's important to put it at the right place; if you put it under the car, you will put a lot of force on it (see your sketch) and it might not be that reliable.

 

For a trackday car, one fan might be enough. I run 1 fan on a road car (with turbo) and if you, after a good blast on the highway, end up in a traffic jam, you have a lot heat in the engine/turbo that will end up in your cooling system and my single fan is on the edge then. My mate runs 2 fans and has no issues with that.

[lahondal 17]

Car purpose will be tarmac rally, so traffic jams will not be a problem.

 

Anyway, a second fan is a good idea, cooling is always important.