koji777

iTrader: (3)

What would the preferred injector size be for a 408 CI 9:5.1 cr F1R 15lbs boost motor? I know this would depend on goals... lets say street driven, occassional track... +/- 800 RWHP... I've got my thoughts... wondering yours... opinions wanted.

red beast

96 lbs..... I maxed out 75 lbs at 780 rwhp 12 psi at 5000 rpm....

Moz

iTrader: (8)

Probely over 60#'s

02SSLE

iTrader: (26)

One of my friends just got back from EPP with 04 ZO6 made 840RWH @ 14psi with 60pound injectors @ 80 duty cycle. It did have a A1000 pump on a hob switch.

koji777

iTrader: (3)

I want to try and stay with high imps... the lows are a bear to get right, especially for a daily driver. I'm running 96# low imps right now... too big for a daily. I've had alot of help from this "forum" and alot of help that has costed me a few thousand here locally that I did not have to spend. I'm right at 800 rwhp right now... but drivability, fuel consumption and general running characteristics are not good at all. I was told that 60#ers would be the way to go... I'm just being a little more cautious since I've been wrong in the past... keep the opinions comming


Mark

HUNTER02SS

iTrader: (24)

60#'s will be fine as long as you have enough fuel pressure. I have 2 bosch 044's.

2001WS6Vert

I'm at 100% with 60's at 650rwhp. If you want to try and stay high imp. I would go as high as you can. That would be 75's I think.

nitrorocket

iTrader: (12)

96 should run perfect, especially with a 408. I have been running them for 2 years with a 347" TT. Have you read my tuning tutorial on efilive about 96 lb injectors?

koji777

iTrader: (3)

No I havent. I'm running HPTuners..... woud it be the same?

SRZ

iTrader: (14)

What exactly is wrong w/ those 96 low imps being on a daily driver? I've got some RC 72's high Z that I'm getting ready to sell and look for low imp 83's or 96's. I'm using a FAST XFI as well.

03sierraslt

iTrader: (19)

Do you have any more info on this tutorial, a link or anything? thanks

koji777

iTrader: (3)

Just can't find a tuner that can turn them down far enough. I run rich, I have to feather the throttle on decel to kep her running. Every tuner I have talked to says that I need to replace them, and they cannot be turned down enough. I've contacted 4 sponsers here and they all said the same thing. I always run into 1-4 people that have the same setup and are running with no probs, yet I can't get mine to work quite right. I dunno any more. I'm just gonna go back to high imp and was wondering what would be a good injector for my goals, where to get em .. etc.

HUNTER02SS

iTrader: (24)

Wow, what kinda fuel pressure are you seeing. Do you have a FPR?

koji777

iTrader: (3)

My base is set at 42 psi. I'm running boost referenced FPR (areomotive I believe)

nitrorocket

iTrader: (12)

Here is a link, HPTUNERS will be the same.

http://forum.efilive.com/showthread.php?t=3191

2001WS6Vert

After thinking about it (they've been in awhile) I have 55# Siemens. I do have a boost reference regulator, base at 52 and 16 lbs. boost for 68. The 650 was on a Mustang dyno so it is conservative.