Originally posted by PMT
Just some quick comments about the engines used at the worlds. The Sirio engines that powered Josh's car for the TQ as well as Collari and most of the other Sirio powered drivers in the finals were the Collari Modified Sirio's. These are available on a limited basis and can be bought in the stores. As a matter of fact Darrin Ishitani used this engine to TQ the McCoy and beat the lap record by 1/2 a second. Look at the pictures of the cars but if you see gold heads on the Sirio engines then you know that they are Collari Modified.
Not necessarily. These engines are not available and will not be for at least a few more months. They were prototype Sirio engines that incorporate part of the block and the sleeve. The sleeve bolts to the engine block, and then the head bolts to the larger upper section of the sleeve. It's a little more complex than that, but the point is, these are not the current gold head Collari engines that you can buy in stores.
Also, all of these prototype engines used a gold head, and while Collari's looked like it had his name engraved in the upper fin of the cylinder head, it looked like it was done by hand and was probably not any different than the other engines that were clearly not "Collari Modifieds."
The presence of a gold head was a good thing if you were a Sirio team driver because it meant you were running what appeared to be the most powerful engine at this race, but it didn't mean anything with respect to the "version" of the engine. All of the prototypes had gold heads, and absent some hand engraving, all the engines appeared identical.
I can't wait to try one of these engines once the come out. It's been a long time since I've seen this type of innvation in engine design. I think it's been used in the past, but it's the first time it's been sucessfully incorported into a modern engine and it makes some very good power.