magnamx-5

iTrader: (7)

whats that td04 I cant hear you over my spoolin tdo5

speedf50

iTrader: (2)

Was that still with stock fuel pressure/pump?

Not trying to thread jack, but thats right where I want to be (hp wise) and I'm thinking that 460's sound right.

magnamx-5

iTrader: (7)

you should be fine at that level if ben can do it on a 1.6 and airbrush on a big turbo 1.8 then it will work for you as well.

speedf50

iTrader: (2)

But are both of them running stock fuel pressure and pumps?

Ben

iTrader: (33)

No I have an upgraded fuel pump, walbro 190lph hp, which probably helps keep fuel pressure steady better than the stocker could. I'm well under 80% IJDC at my power, rarely get to 72% or so on the street.

not sure what would be lost with a standard pump.

speedf50

iTrader: (2)

We need braineack or someone who isn't lazy like me to figure out the flow requirements of the 460's at that power, and the stock pumps flow in comparison.

Braineack

iTrader: (62)

the stock pump can flow 300BHP at 50psi....so if you arent making more than that, a new pump isn't needed...unless it's crapping out.


here's a good resource for the lazy: http://www.megamanual.com/v22manual/minj.htm

speedf50

iTrader: (2)

Sweet thanks for the info. 460's sound like a good bet for 250whp.

Ben

iTrader: (33)

of course, that's assuming the stock pump holds 50psi at high map through red line. A fresh pump, probably no problem. From what I see, some--even most--do, but others don't. These things are getting pretty old now.

The stock pump in an NB can NOT hold 60psi (NB's run 60-63 static) in high map, high rpm situations.

cjernigan

iTrader: (13)

Do you know how much they drop off?

Braineack

iTrader: (62)

ask POPSTOY :gay:

according to him it drops to like 40psi or something really low...he's convinced the only cure is a 255lph pump as he saw the same with a 190lph, but I'd take that with a grain of salt.

Ben

iTrader: (33)

I'd say invest the $20 in a fuel pressure gauge, but really I'd just put that $20 towards the $80 a new pump costs. But since you run a MS, I also assume you have a full time wideband. So you'll know if you need a better pump or not.

People here tend to get pretty hung up on fuel pressure. I don't give a rat's A what the fuel pressure is, as long as my chambers get their fuel.

jif

460's come with some of the Subaru EJ20T's ... so you know they're good for at least 280hp at the *crank* even with a rich/retarded factory tune