LOsoccer(at)aol.com wrote:
> INow I'm worried about my Stroms. When I compare them to Solex's used on
> the racing volvo p1800 there doesn't seem to be that big of difference. And
> what happens at high rpm to make the pistons go full open. I don't know
> didly squat about these carbs. I've always worked with Webers and Mikuni's
> on my race cars. Simple and easy to adjust.
>
> Jarrid, you wrote that I should not have polished my intake side. I've
> heard more theories on this stuff. In Smoky Yanick's book I thought I read
> that by polishing the intake and exhaust you can improve breathing. I can't
> find my book right now but I'll check it out. On my Datsun 1200 GT-5, my
> Nissan Sentra GT-4 and my Fiat racers all the intakes and exhaust were
> polished or at least very smooth. I don't own any of these fine cars now.
> Kids won me over to soccer and basketball, so as close as I can get to car
> work is hot rodding an alpine.
I didnt say not to polish, I said dont get carried away and open up the ports.
The size of the port (cross sectional area) has a great deal to do with the
port velocity, and port resonance. The valves will become the limiting
factor in breathing on the alpine before hogging out the ports 1/4 inch larger.
You want to port match the intake to head, take the sharp edges out
of the flow path, round where you can, just dont get carried away.
The piston height on the stoms is proportional to volume flow.
The 150CD flow capacity at about the extent of what the 1725
needs. Volvo 1800 engines as well as Triumph TR7 engines used
a 175CD which will pass more air with the same pressure drop.
If you get al alpine to make torque at higher RPMs, the engine will
need more air, and thus require carbs that can pass the air. On normal
carbs we would put a bigger choke in it (reduces pressure drop with
a given flow), but we cant do that with stroms as the maximum venturi
area is set by the max piston hieght.
175CD have more cross sectional area across the venturi, these might
make a more suitible carb for 130BHP.
Jarrid
This archive was generated by hypermail 2b30 : Tue Sep 05 2000 - 08:45:08 CDT