Fitting Maniflow 4-2-1 To S16 Engine

[monty69 6]

Seen lots of posts about how flange is 9stud on mi and 10 s16? So is it easy as drilling extra hole in manifold, or removing extra stud? I know miles gas universal ones, but a local lad has one for sale cheap.

[Miles 331 1 Cars]

Depends, the later ones have both hole layout's but they forget to tell you (maniflow that is) that they don;t fit as the engine's taller so you either have to tilt the engine and or mod the bulkhead, but the std manifold mates to the std downpipe without any mods at all

[DrSarty 90 1 Cars]

Depends, the later ones have both hole layout's but they forget to tell you (maniflow that is) that they don;t fit as the engine's taller so you either have to tilt the engine and or mod the bulkhead, but the std manifold mates to the std downpipe without any mods at all

 

What makes 'it' taller please Miles? Is it the S16 head or the height of the block?

 

Rich

[Miles 331 1 Cars]

Come on Rich, I would have thought you;'d know that one

 

The block is taller, Head pretty much the same bar some minor differances

[monty69 6]

Come on Rich, I would have thought you;'d know that one

 

The block is taller, Head pretty much the same bar some minor differances

so can an extra hole be drilled in flange for extra stud?

[DrSarty 90 1 Cars]

Yeah you're right Miles, but I never saw the two side by side, and it didn't occur to me until I saw this thread as guess what, I've got a Maniflow 4-2-1 exhaust and clearly now I'm going to have to make some modifications to make it fit.

 

I guess I was just hoping it was the head. Bummer!

 

Out of interest, how much taller is the iron block to the alloy one. It must be considerable to mean exhaust foulage?

[B1ack_Mi16 67]

Yeah you're right Miles, but I never saw the two side by side, and it didn't occur to me until I saw this thread as guess what, I've got a Maniflow 4-2-1 exhaust and clearly now I'm going to have to make some modifications to make it fit.

 

I guess I was just hoping it was the head. Bummer!

 

Out of interest, how much taller is the iron block to the alloy one. It must be considerable to mean exhaust foulage?

 

That should be 10.5mm from crank centerline to deck.

[DrSarty 90 1 Cars]

so can an extra hole be drilled in flange for extra stud?

 

^^ Reposted by me after I thread hijacked...again

 

Very sorry Monty. But even if you can drill the extra hole in the Maniflow flange, you may now have to consider (like me) how you're going to cope with the potential bulkhead foul as Miles said. I'm guessing an engine tilt has issues such as master cylinder fouling, how it's done, drive shaft angles and oil starvation. Whereas bulkhead mods are drastic but a proper solution.

 

Might be useful having all the answers in this thread.

[Miles 331 1 Cars]

No you cannot drill the extra hole and the other's are in a different possition too as the flange is more of a wave shape, The later ones are all flat and come with all the holes

With 205 tolances being what they are you might get away with some triming of the bulkhead and flating the midle section only slightly, I know that someone off the forum with a Iron blocked engine (Well posted and can;t think of his name now) had one modded at Tube Torque up North

[DrSarty 90 1 Cars]

Thanks Miles. There have been some excellent photo stories of pucka bulkhead reshaping mods recently, so if it won't fit and a slight reshape of the lip with a hammer won't let mine fit cleanly then I will copy the cut, bend, plate weld, treat & paint route too.