Single Plenum Mi16

[petert 588]

I wrote in another thread recently, about a friend who was having his Mi16 engine rebuilt by a renowned engine builder in Adelaide. Some were skeptical, but I'm pleased to say that it makes a very creditable 240hp @ 8500 with a very linear power delivery. I don't know a lot about the build, other than it's 83.5mm x 88mm, 35.5mm inlet valves, standard rods and crank, shimless solid Catcams (grinds unknown), 4-1 exhaust and has a highly modified Mi16 inlet manifold fitted with a GM Commodore V6 single throttle body.

Edited July 27, 2012 by petert

[welshpug 1,661]

bow big is the single throttle body it uses?

[petert 588]

Most likely 64mm.

[karoshi 0]

Any details on the manifold mods? Interesting regarding road legal in Oz.

[petert 588]

All I know at this stage is that it was cut apart and trumpets added, etc. I suggested why not start with a GTi6 and he assures me it's way better than that.

[karoshi 0]

I've got one of those and they have trumpets already!

There was a thread on 306gti6 re one cut apart, polished internally and welded back together with negative results. I think he cut the trumpets off though....can't find it at the moment.

Itb's seem like a safer bet....

[welshpug 1,661]

must be quite an inlet if it betters the gti6 one, what kind of duration and lift cams is he using? the 306 btcc cars were around that on a "standard" inlet.

[petert 588]

As said above, cams are unknown, other than brand. I do know it run Catcams single springs however.

[James504 12]

I am having trouble picturing this manifold. Would it be similar to a say a rb20/25 manifold with the trottle body in the middle of the plenum or like a rgz/rgx inlet where the trottle body morphs into 4 runners?

 

[kyepan 291]

Nice one, would be interesting to see a graph for that!

[petert 588]

A picture of the manifold. Sorry, no x-rays but you can probably imagine what's inside.

[mmt 15]

How Big is the gti6 TB? 63mm?