[Diy_efi] "Wet" Manifold Questions

[Kenny W]

Quoting Stephen Andersen <SAndersen at advan-tek.com>:
On the Lysholm:
> I think it would be PERFECT for a 4cyl, as it
> would give
> you lots of low-end torque, while still giving
> efficiency
> and power "near" that of a turbo at the high
> end.

Ya, I tend to agree to a point I definitely think 
they're more suited to low displacement engines, and 
turbos are just great for something like a V8 where is 
has enough grunt down low that lag is a non issue. For 
some time I heavily touted the lysholms. Things like 
parasitic losses still are an issue though, and can 
make the throttle response of a low compression 4 
banger horrid. And they're brutally expensive. You can 
get very nice ball bearing turbo that properly matched 
to a properly tuned engine will give you very close to 
as broad of a torque curve, and more of it with respect 
to peak values. As I fiddle more with things, and 
calculate, and read, and etc, the more I com to the 
conclusion that for my own purposes an NA engine with 
everything well tuned and optimized with respect to VE 
and such, with a turbo added, is a great solution. Like 
in the case of my engine. The hope is to have 160 NA 
hp. It has 117 stock. add 3" exhaust, heaviliy worked 
head and cam. At 10:1 cr, I may even be able to run 1 
bar with octane booster, intercooler, and water 
injection. that translates into 320hp- from a 2.3L with 
basically just boltons. When it blows I'll go with a 
slightly lower cr (8.5 or so) and slightly more boost. 
Yeah a lysholm would give more get bottom end, but that 
would basically all just go into tire smoke anyways. ;)
I haven't decided about how to handle fuel and 
ignition. (main reason I joined this list)
-Kenny


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