Big Valve Head

[AlexG40]

Any idea how many miles this head has done since it was built?

[Insight G40]

I'll try and find out.

[Insight G40]

Any idea how many miles this head has done since it was built?

Head was new from PSD, has covered approx 2000 miles since then according to last owner who had it in a car.
Been stored indoors since removal from block.

[gaz g40]

what kind off increase will this bring rob?

[hayesey]

well as a comparison, both Robin & myself got the final mapping done on our turbo conversion on the same rolling road on the same day.  His car is standard head with 1341cc bottom end, mine is standard bottom end but BVH.  Otherwise basically the same spec and boost.

As for peak power they were pretty much identical (although I would like to say, mine was 0.2bhp more ).  For most of thr rev range, Robin's car actually made a bit more power than mine at lower revs (around 10bhp for most of the mid-range) as a result of the increased CR and cc's, however his then runs out of steam at higher RPM and the curve starts to flatten where as mine carries on increasing to match his power which is clearly a result of the heads.    Both cars made 194bhp.

[Insight G40]

Cheers Hayesey

[gaz g40]

so a very good mod then to have a guess. well if you still have it rob when i get back from holland polo show ill have it plenty of standby money to come next month haha