Herb
Did you re-jet your carbs? The K&N will allow more air into the engine
and most of the time a need to re-jet the carbs is necessary. What kind
of carbs are you running? Stock, Webers, Holley? Not sure if the
stockers can be re-jetted, but obviously the Webers and others can.
This happens to almost ALL carbureted cars that get upgraded to the K&N
filter. My 79 Spitfire has the K&N filter with the chrome cap fitted to
a Weber carb. If you have the same setup, email me and maybe I can help
you through it.
Just my $.02.
Kris
Herb Hargraves wrote:
>
> Hi All,
>
> I just installed my new K&N air filter on my 77 Spitfire. I was all set to
> see a real difference in performance, well not really a big difference but I
> really liked the idea of the chrome cleaner. Any way I got in, fired up the
> Spit and went for a ride. I went for about a mile down the road and the car
> acted terrible. It seemed starved for air. Thats something I didn't expect.
> As I gave the car gass the RPMs came up to about 3000 then would drop back
> to 2000, if I let up on the throttle the RPMs would come back up somewhat.
> At first I thought it was getting too much air but it runs fine with the
> stock air cleaner and with no air cleaner. I washed all the oil out of the
> K&N filter filter and tried it again it seems to run better but still limits
> my speed to about 65mph and the RPMs will drop off somewhat. The only
> difference I can come up with is the square hole above the air intake is
> restricted on the K&N but I'm not sure why it is there. The hole is above
> the piston. I am inclined to cut the base plate of the air cleaner but if I
> can't use it I would not be able to return it if I modified it. Has anybody
> had a problem like this? O if you have any ideas on this problem please let
> me know.
>
> Thanks in advance.
>
> Herb Hargraves
> Cannan ME
> 77 Spitfire
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