i installed my 255 walbro last week its it got louder then the stock and i unstand that, now i installed m 12:1 vortec FMU and its got alot louder once again. is this normal?

 

Why are you running an FMU? With the sheer number of tuning programs (especially free ones) on the market today, there's no reason to gamble on an FMU. In my opinion, change the FMU out so your setup lasts

 

car is my wifes only a single slam with 5 pounds. fm for my small setup should be fine but is this normal?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ChampWhiteTegra &raquo;</TD></TR><TR><TD CLASS="quote">car is my wifes only a single slam with 5 pounds. fm for my small setup should be fine but is this normal?</TD></TR></TABLE>

these days, FMU setups are so uncommon that i really haven't a clue to be honest

 

wow u got a cool wife

 

where is the fp before and after the fmu install at idle?

i would think under a load the pump would be straining, but at idle? idk. put a gauge on it and see where it is at.

 

anyone else?

 

ear plugs.



they're cheap!

 

i think the FMU is designed to work around the stock fuel pump.......you will probably be way over-fueling with the walbro pump. plus at 5psi you probably wont need any more fuel than what the fmu will give you.

the walbro pumps make more noise than normal anyway.....and running a 12:1 ratio FMU is just gonna make that already loud walbro pump even louder.

 

i thought the pump would be enough for 5 pounds i was wrong. it was slow and broke up. now with the fmu and the pump it doesnt break up at 5 pounds but its a lil rich. sooooooooooooooo now the boost is at 8 and feels great! just wanted to know if the pump being louder was ok

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ChampWhiteTegra &raquo;</TD></TR><TR><TD CLASS="quote">i thought the pump would be enough for 5 pounds i was wrong. it was slow and broke up. now with the fmu and the pump it doesnt break up at 5 pounds but its a lil rich. sooooooooooooooo now the boost is at 8 and feels great! just wanted to know if the pump being louder was ok</TD></TR></TABLE>

wow, if you don't get some kind of engine management REALLY soon. you will blow that thing really quick with that kind of "tuning".

 

it raises fuel pressure because of the pos fmu design, thus fuel pump works harder? just my thought