1341cc Power Gains

[jez1272gt]

Does anyone know what the expected power gain would be when converting from 1272 to 1341cc without factoring in any other modifications?

I assume no-one has ever tested this properly?

Thanks

[hardchargin40]

I though it was about 10-15max bhp, same torque?

[hayesey]

about 140bhp when psd tried it back in the day.  prob a 20bhp increase but it needs a remap to suit.

[jez1272gt]

Really as much as that - i was expecting it to be less..!?

Was that 140bhp with a remap then do you know hayesey??

Cheers guys

[hardchargin40]

Dont think that engine had a stock head when it was tested, but was with stock charger and pulley if i remember.  Barney's wasn't it?

[hayesey]

I was thinking of the grey one that was Rob Chaplain's that beavis brought to an RR day years ago. was supposed to be basically standard other than 1341 and a chip to suit, I think it was the first ever 1341 done. 

[hayesey]

as seen second from the left with plate ending 'jca' in this pic from said RR day (this was when we went to mcdonalds for a hangover cure on sunday morning after a night in wolverhampton civic hall):

[hayesey]

sad thing is, I think the only cars out of all that lot still on the road are Marshall's and mine.

[hardchargin40]

Ah of course, forgot about Rob's 'test mule'.

[samg40]

Yeah I remember Beavis telling me it was pretty much stock bar the 1341 and it got 140. Didnt it have gaffer tape covering a hole under the rear passenger side window? Looked a nice car from a distance and ran 14 inch classics?

[Andy]

But then a fresh stock G40 would put out around 130bhp - so I'd say about 10 brake and probably around 10lb/ft too. The higher CR helps as well as the extra capacity, but a chip to suit is key.

[jez1272gt]

But then a fresh stock G40 would put out around 130bhp - so I'd say about 10 brake and probably around 10lb/ft too. The higher CR helps as well as the extra capacity, but a chip to suit is key.

130bhp stock -  am i missing something.. what happened to the 113bhp figure, did fresh G's back in the day always pull more on the rollers then?? I cant say ive ever heard of this..

[PeteG40]

i've had 121 and 123 out of totally stock g40s on decent rollers.

[hayesey]

yeah healthy standard ones often do more than the book figure of 113bhp.

[karmann]

I see a few aircooled high power motors being imported from California and they claim to be always more bhp than what they read over hear, running same octane and yes i know the atmospheric pressure is different but still claim more power and quite allot more, w :Pe like to call this the CCF meaning Californian Correction Factor