Most Powerful N/A M20's

[AntParker]

Thanks for this Info Digger, Very Helpful, Ill get the head of my 'new' engine flow tested and see how results compare with the above, based on this you can almost correlate the power to the flow of the...

[AntParker]

Oh perfect, ill take a look, thank you !...

[AntParker]

Thanks Digger, Really interesting, So the head which is on my engine now was ported and matched to the intake (RHD ITBs) but id be interested to get it on a flow bench and see what she actually flows....

[AntParker]

Gotcha, Sounds like i need to find this guy and ship him the head for my new build! after watching some more of grooty's videos yesterday it looks like the head is key!

Sadly i don't have...

[AntParker]

The Comments for the engine on youtube above - 'robs 2.8E30' Says it has 4mm Larger valves if thats right that must be a considerable re work of the entire head surely.
Do you think 1mm oversize...

[AntParker]

Really interesting topic this guys, so we are saying that most of the power is to be found through a really good flowing head - not just valves but valve throat etc.

I'd also be keen to...

[AntParker]

I'm sure this is a conversation which has been had here many times before but probably not recently,

Question is who/ what is the 'most powerful' N/A M20 - Appreciate this is massively subjective...

[AntParker]

Thanks for the help guys - i ended up pushing the valve down and putting a 1.5mm shim between the valve stem and follower, this allowed me to check the entire range of motion for both piston and valve....