Fuel flow thru port line question

lines

We found our Goodridge -3 injector lines to have a slight restriction above 9200 rpm on the bigger nozzle systems. We compensated for this with a few jet sizes on Chris Foster's car last year (8 nozzle system). I've had them on the TAD I tune for the past 2 years (16 nozzle system).

We just tested the prototypes in Houston on Foster's car of a new -4 injector line with -3 ends/nuts on them. These have been flow tested against the conventional enderle rubber line, and flow exactly the same on Randy Anderson's flow bench. We have straight and 90 fittings for this application.

 

Will, if what you say is correct and the restriction is in the hoses to the port and nozzle jets then how can changing a few jet sizes fix the problem. If you change the main jet then the restriction to the port and hat nozzles is still there in the hoses and if you change the port or hat jet sizes then the restriction is still there in the hoses. It would seem to me that the only solution is to raise the fuel pressure to both the hat and port nozzles to increase the flow through the now available slightly restrictive Goodridge hoses. Also a 16 nozzle system would be less restrictive than a 8 nozzle system because on a 16 nozzle system you are flowing less fuel through each line. Therefore a 8 nozzle system would show more restriction below your 9200 rpm. That data that I had from Randy Andersons flow bench showed a restriction all the way up in RPM from 6000 up through your 9200 to over 10000 rpm. I agree the restriction is less at lower RPM because the fuel flow is less but it is still there and enough to bend wrist pins and pinch rings if not known and correctly compensated for.

Is Goodridge going to swap out the previous -3 injector lines with the new -4 injector lines free of charge?

 

lines

I've put these hoses on a number of cars and had zero probems, these are just cars I've worked with myself. We have sold these to a number of people over the past few years that have ran them with no problems.

I've talked to a number of them and told them I would work with them on a new set of the bigger lines.