Best Mi16 Convertion Ex Manifold

[flyfisher 6 2 Cars]

i wonder if anyone has views on what is the best mi16 into 205gti convertion exaulst manifold been offered a p.d.m. re angled mani has anyone had any dealings with this

[Miles 331 1 Cars]

Depends on your budget, I always use the 4-2-1's which I supply as the labour is less and you don;t have to muck around as much,

Never heard of P.D.M but before buying no matter whats said make sure the welding is good and the company/person is only on ebay etc for a few months

[flyfisher 6 2 Cars]

Depends on your budget, I always use the 4-2-1's which I supply as the labour is less and you don;t have to muck around as much,

Never heard of P.D.M but before buying no matter whats said make sure the welding is good and the company/person is only on ebay etc for a few months

yes im in two minds have heard 4-2-1 is good but has a limited life being steel also have heard its good for a couple of b h p more however may be a stainless could be best bet i know cost is greater but surely it would last longer

[Batfink 201]

I have a supplier who used to make 205 16v 4-2-1 stainless manifolds for a company in germany. I can ask on wednesday if they are able to make any as the customer has not had any made in years, and the jig is just sitting there..

[JeffR 51]

yes im in two minds have heard 4-2-1 is good but has a limited life being steel also have heard its good for a couple of b h p more however may be a stainless could be best bet i know cost is greater but surely it would last longer

 

The other option is get a mild steel one & have it thermally coated. It's lighter than s/steel, corrosion resistant, greatly reduces heat soak through the firewall & floor & worth bhp as well.

[Batfink 201]

I read that the ceramic coatings effectively change the tuned lengths of the manifold???

[JeffR 51]

Since the coating keeps the exhaust gases hotter & increases the gas velocity, (so better scavanging) it probably has the effect of changing the 'tune' of the manifold.

[flyfisher 6 2 Cars]

choices so many will have to think long n hard

[danny56712 1]

sorry guys just bought manifold and it is supposed to be for alloy mi16 and its the same as in the picture with slight expanding of edges of ports to mattch up to mi head i think, what ye think of this for a job

[Miles 331 1 Cars]

Stainless tends to crack and hense why my exhaust man will not make them

[Paul_13 212 1 Cars]

Stainless tends to crack and hense why my exhaust man will not make them

 

Interesting never knew that!

[Baz 421]

Hence why most Magnex's are shagged.

Edited May 7, 2010 by Baz

[Batfink 201]

I sell quite a few stainless manifolds and no customers have come back with cracked ones.....i've never sold magnex though.. they can certainly crack if people heat wrap them as this restricts the expansion of the metal as it heats..

I went to speak to my custom exhaust manufacturer and they will build a stainless version if I want though we need to do a bit of development work. The design they have is a 4-1 and is for the 205 with 16v engine. I think the design is better so it wont fall apart all the time like the maniflow.

I'm going to get one made and fitted to my race car so will see what the fitment is like. Might look at sorting a full exhaust system as well to go with it.

 

Kev

Edited May 12, 2010 by Batfink

[Simes 248 2 Cars]

I've had one of Miles 4-2-1 manifolds now for 6 years or 40,000 miles - which ever way you want to put it.

Seems ok to me.

[bazil_205gti 22]

Me also have a 4-2-1 would say it the better chioce had a re-angled one but like others it cracked

 

Me also have a 4-2-1 would say it the better chioce had a re-angled one but like others it cracked

[matthewm 1]

Quick question for you chaps, bought an alloy MI with a 4-2-1 conversion manifold already on it so not sure of make, wondering where I can get another flange fitting for the otherside of the manifold. Also which donut do they tend to use, found one similar at motor factors but its a smidge too big diameter and not as thick as the old one.

Appreciate they may all be different but if you could give me an idea so I've got somewhere else to start from!

Cheers

[Miles 331 1 Cars]

I can get them within a few days normally

[Alastairh 47]

I use to have a 4-2-1 system on my 205 Mi. It started to rust and blow badly. It then knocked the bulkhead even with fresh uprated mounts.

 

Personally, i would go cheaper routes and spend the time to make them work rather than spend 3-400 which isn't fit and forget.

 

Al

[Simes 248 2 Cars]

Quick question for you chaps, bought an alloy MI with a 4-2-1 conversion manifold already on it so not sure of make, wondering where I can get another flange fitting for the otherside of the manifold. Also which donut do they tend to use, found one similar at motor factors but its a smidge too big diameter and not as thick as the old one.

Appreciate they may all be different but if you could give me an idea so I've got somewhere else to start from!

Cheers

 

Timax FDG40

from a Mark 5 escort