Indeed. That's why I'm trying to plan my stage 2 so the parts chosen will work with high comp heads or a big bore kit if I decide to go that way in the future. With that in mind I'm inclined not to bother changing the stock manifold for an aluminium one as I'm assuming if I fit bigger big bore barrels and heads at a later date the manifold will have to be changed anyway.
I'm going to stick with pipe, breather and cam for now because I think the 117 engine has a lot to offer when uncorked. And if I push output up to 140+ bhp I think the suspension's going to need some attention first. Not point making big power if you can't put it onto the road without sliding into a ditch.

 

Any shop or person using STD correction factor should not be trusted, it's just that simple. SAE writes these standards and when they write them they also give you what they are to be used for. As well as if the standard is still in use.

"Small Spark Ignition Engine Test Code(Cancelled Aug 1988) J607_198808

The purpose of this code is to prove a uniform means of comparing small gasoline engines of 0.82 L (50 in3) or less in displacement and 15.1 kW (20 hp) or less in power output. It is not intended as a laboratory manual. Governor characteristics are considered part of the end item specification. Replaced with J1349"

The SAE J607 otherwise know as STD correction was written for engines of less than 50 in3 ONLY, making less than 20 HP. So right from the start they are trying to apply a Standard to an application that it was never intended to be used on. Now you may also like to know that the Standard was cancel back in Aug. 1988 and replaced with SAE J1349 which is known as the SAE correction. It is commonly know that the STD corrections cannot be trusted but will always show higher results than the SAE standard. How much is really hard to say, as it changes with the weather conditions and the altitude of where the testing is being done. Bottom line is simple, ask yourself would you want to trust the shop that cannot tell you the truth of their test results? There is no excuse today for trying to use a Standard that was CANCELED over 35 years ago, let alone using it improperly to start with.

 

No it doesn’t. Ethanol actually has less BTU capacity than gasoline. But, since it typically has higher octane you can add more compression and spark advance.