2008 LS3 Engine

[SteveRod]

interesting article from 'Motor Trend' on the 2008 LS3 Corvette engine improvements listing all the details with illustrations

HERE

[Rob LM]

Thanks for posting that link - seems there's lots more than just an extra 0.2 litres.
Wonder if you can just stick the LS3 intake on an LS2 for a quick improvement (not that it really needs anything to be honest!)

[te51cle]

Base model now has more power than the C5 Z06 did !

[ringram]

Rob LM said:

Thanks for posting that link - seems there's lots more than just an extra 0.2 litres.
Wonder if you can just stick the LS3 intake on an LS2 for a quick improvement (not that it really needs anything to be honest!)

Nope the heads are L92/L76 style heads with hollow valves, basically pre production LS7 prototypes (according to gmhightech mag) Intake is 2.16" from memory. They are by all accounts pretty awsome. The square ports prevent intake use with LS2/LS1 style heads. Anyone with the LS1/2 heads are better off with a Fast90 intake anyway, though probably only with a cam to make use of it.

Guys on corvette forum in the US with cam and bolt ons are making over 500rwhp. So in the Z06 terratory.

[LuS1fer]

te51cle said:

Base model now has more power than the C5 Z06 did !

Although the Americans always reckoned the "405hp" C5 Z06 was nearer 425hp. Whether that's true or not I don't know but it's not like GM haven't always underquoted their figures. I know a lot of people ask why but it makes your car seem very fast for what it is without upsetting insurance companies and it's a cunning way of letting your competitors "match" your "405hp" I suppose...

[ringram]

Bit of an argument about stated power on corvetteforum US site.
Basically manufacturers need to state power to SAE standards within 1% of actual. So understating isnt really acceptable from a federal mandate point of view.
Therefore its likely that power figures are accurate and the only things thats wonky is peoples calculation of driveline losses.

[Godzilla]

That's also what I understood by "SAE rated". Basically they are all 505bhp +/- 5hp so calculate your driveline losses from that.

Here's a piece I wrote today about the LS7 v F430 engine: http://www.auto-journals.com/blog/