Guys that think you can bolt on a set of twins on this motor and have great performance increases from stock are in for a very rude awakening irregardless of the brand including SLP. Also note simply putting a proper tune on a dog can add 20hp! Kind of depends on where you start.
Done right they are absolutely impressive and you'll struggle to enjoy a really well setup and running single pipe pump gasser there after because there is that much difference when things are going right....
THESE THINGS ARE IMPORTANT:
For maximum and consistant reliable high performance results you need the following:
actual pipe and exhaust design (some work some don't and depends on a combo of stuff)
correct head modification (some work and some absolutely do not)
correct octane of fuel (there are huge performance variables within .5 octane rated fuels and it varies along with the use environment...just saying run 50-50 is like saying it's hot outside..What is hot...hot enough to die...hot enough to sweat...hot enough to not feel cold?)
EGT's and the knowledge to applicate the info
correct clutching and valve pressure management
either a custom ecu for your environment or the ability to manage your fuel. Knowing the density altitude value and the relationship that has to your engines performance plus understanding your margin versus your fuel octane is magical information.
Sounds daunting? IT IS! This is why you buy a COMPLETE known setup from a reliable source who has already designed a "system" of tested and known performance and you applicate it within those known environments. Get outside of that or forego some key pieces of the puzzle and quite possibly suffer the consequences of bad or inconsistant performance or a major mechanical.
My testing shows you get about an average of 3500 alt feet and 20* of ambiant air (if all things remain constant, which they generally don't, you get about 6% variance of air density before things tilt) if conditions remain relatively consistant for density values before your buggy will run irratically on previously great setup. Interestingly there appears to be a relationship between these same air values to how both single pipers and then again stockers operate on the 800 CFI system but it's with further variation of values. We can then theorize that performance exhaust/spark/fuel management does narrow the band and requires more finite management to achieve high performance.
hurry up jaws! haha i want a set!
