fuel pressure drop when at 5k rpm

[CMF_sukoo]

recently my frez install emanage ultimate in his car and went for dyno tune
once the car reach 5.1k rpm the fuel pressure of the car drop and thus the hp also drop
the same goes to my car when i do a butt tuning of unichip in my car last year
my tuner say hat it can be due to the fuel pump problem but i been using original mit evo 7 fuel pump and my injector are stock

jus to ask you all for opinion what can be the problem?
is it the car design default setting or if my fuel pump cannot support the pressure or my injector need to be change?anyone experience the same problem?

and my thinking is tht if i were to install and fix a warlboro 255l fuel pump can our fuel hose support it?

 

[CMF_Alex_B]

http://www.roadraceengineering.com/fuelpumptechtip.htm

that might help, just get a multimeter onto the pump and see what voltage its running, might save you a few pennys,

Alex

 

[CMF_Alex_B]

if you really want to get all tech about it, have a read here > its not for micra's but you can learn plenty:

http://www.2gnt.com/www/corbin/choosefpr.html
http://www.2gnt.com/www/corbin/example.html

Alex

 

[CMF_sukoo]

ok thank will go n try to figure out the problem
hahhahahahahhaa
as i saw the dyno chart of those tc micra here
their highest torque is still aorund 5 k rpm plus
maybe it is the car original default tin?
hee hee