Is this pump a straight swap? Does anything need to be modified in the tank to make it work?

Did a search and only found a thread of some one asking if it needs tuned.

 

thats a down grade.

get the dw300.

y r u changing ur pump

 

Fueling problems. Duty cycle running 116% peak and 20ms at 6900rpms. 42's on the 3" pulley. I tested rail pressure and it fluctuates 58-62 psi under wot. So I returned the tester stumped. Only thought is that it is intermittently losing pressure.

 

if you are going to get a pump get a pump wally 450

 

wats ur target wot afr


very true

 

11.4 ish is the AFR around there.

 

well if ur fuel pressure isnt falling off ur pump is fine.
58-60 is perfict

 

Duty cycle running 116% peak and 20ms at 6900rpms. 42's on the 3" pulley. I tested rail pressure and it fluctuates 58-62 psi under wot. So I returned the tester stumped. Only thought is that it is intermittently losing pressure.

 

hmm wat other mods do u have.

 

Option b
Front mount heat exchanger
3" cold air intake
Long tube header
2.75" dp
2.5" magnaflow exhaust

 

But it's hitting the 11.4 AFR's?

 

the 42s should be plenty.
i ran a simular setup with nos and a 2.8 for years

 

You do need to be tuned for a different fuel pump tho right?

 

Yes. I am going to try and get my wideband hooked up to my HPT today so I can do a log with my AFR.

I do have a log for anyone that wants to see what it is doing.
Basically: Throttle in and the duty cycle ramps up with the RPM's to about 6k where the duty is ~80%. Pass 6k and there is a cycle spike and they peak out over 110% before redline.


TJolley: Right? And I have seen countless posts that the 42's will do a 2.8. This is why I am like WTF is wrong with my car.

 

Is the tuners config file setup to read duty cycle correctly?

Also DW300 as a minimum for a drop in

The zzp340 and walbro 450 are also excellent choices. Bring your dremel

 

Will I need to tune for the huge pump or will it only use what it needs?

 

post up the log file ... also where did you get your config file from ?

 

not for the pump but if you adjust your base pressure (im assuming you have a RSFS) then you need to update the injector offsets

 

I think he is still on the stock system

 

Yes. Stock system still.

 

http://www.mediafire.com/download/up...STG2%20Log.hpl


http://www.mediafire.com/download/3h...e_Modified.hpt

not sure if this is how to correctly post these files, but here ya go

 

Yup.

Perfect.

Thank you.


Posted is the link for the tune that is on my VCM and the log I took after the write.

 

his tune was taken off of the HPT repository.

it was labeled "Stage 2, stock"


all the OP did was turn off the VAT, correct me if im wrong

 

This is the correct info.

 

And i have learned that I have two different renditions of "stock" stage 2 tunes. No surprise there is a huge difference in the fuel tables. The file with the VIN number is the one on my PCM and the other is different. Anyone care to look and tell me which one is for my 42lbs injectors?


Tune I think is right for my car:
https://www.mediafire.com/?b033x20l44oh4x3


Current tune:
http://www.mediafire.com/download/3h...e_Modified.hpt