What's the difference

[quinny]

The initial message was deleted from this topic on 15 October 2011 at 21:17

[HarryW]

quote:Could any one enlighten me on the difference (if any)between an HC engine and a non HC engine. Also what does HC stand for?
Quinny.

High Compression, in the 400 engine I understand it to have an upgraded timing chain (duplex = stronger), some head work (still trying to get TVR Power to say exactly what, if any?), double valve springs, wilder cam profile (500 spec in the 400HC), in theory this gives 275bhp against a standard 240bhp (real world figures probably nearer 220bhp and 200bhp).
In the 500 I think that all 500 are HC spec, therefore they are all called 500's.
Then again I may well be talking out of my ar*e.
I hope this makes it clearer

Harry

[shpub]

It is not High Compression... but High Camlift.

Steve
www.tvrbooks.co.uk

[GarryM]

No difference at all on the 500 - some are called HC some not but no difference mechanically. The 320bhp quoted on later models was due to the engines being tuned to be smoother at low revs (around town).