Fuel system bottleneck fix, Feed line Mod

[Shifty]

Quote: Originally Posted by Isthatatank

well hopefully ill be doing it at my buddies shop and he has a lift all im waiting on is the new walbro pump (replacing because i dont wana do all this work and then find that the pump was actually jsut broken) and my fuel filter

I finished with the Boddle neck mod , and it works great , tons of fuel with the returnline too , only for 2 day the 255 i put in there a year a go is taking a crap

[horngrabber]

There is something I don't understand.... Forgive my retardation...

GT3071R
RC750's
Wallbro
AA Fuel Return Kit
SAFC

This bottleneck fix helps give fuel up top... If I don't have enough fuel up top, then why am I removing so much fuel with my SAFC? I am @ -20 from 5400-6000... doesn't that mean I have TOO MUCH fuel? So how does this help.....

I hope you guys understand my question....

[Lagzilla]

Quote: Originally Posted by horngrabber

There is something I don't understand.... Forgive my retardation...

GT3071R
RC750's
Wallbro
AA Fuel Return Kit
SAFC

This bottleneck fix helps give fuel up top... If I don't have enough fuel up top, then why am I removing so much fuel with my SAFC? I am @ -20 from 5400-6000... doesn't that mean I have TOO MUCH fuel? So how does this help.....

I hope you guys understand my question....

some cars dont need it, im using 650s so i need more fuel. and it eliminates the stock regulator and filter from teh whole setup so u have total control ie no stumbles pops or hesitations

[Vector]

Quote: Originally Posted by horngrabber

There is something I don't understand.... Forgive my retardation...

GT3071R
RC750's
Wallbro
AA Fuel Return Kit
SAFC

This bottleneck fix helps give fuel up top... If I don't have enough fuel up top, then why am I removing so much fuel with my SAFC? I am @ -20 from 5400-6000... doesn't that mean I have TOO MUCH fuel? So how does this help.....

I hope you guys understand my question....

how much boost are you running?

[horngrabber]

Quote:

how much boost are you running?

under normal driving, 21,22psi... week-ends.. 24-25psi...

Quote:

some cars dont need it, im using 650s so i need more fuel

Even when i had 650's... i was removing tons of fuel up top....

[horngrabber]

Anybody?

I have all the parts sitting in a box ready to be installed.... I just don't know if I should be bothered... I have a feeling that I don't need it... how do I know if I'm short fuel up top or not?

[MikeCandler]

Keep it simple, if you are over 400whp to be safe run the mod, if you are under that level you can certainly still do it but is not required.

[Lagzilla]

at 382 whp i was running out of fuel even at 0% and 48 fp with a check valve

[horngrabber]

Quote: Originally Posted by Isthatatank

at 382 whp i was running out of fuel even at 0% and 48 fp with a check valve

okay... i can't give you HP #'s yet... but I am at -20 at 5200 and up and I run 48psi also...

How do you know you were running out of fuel? How can I figure this out...

[Lagzilla]

Quote: Originally Posted by horngrabber

okay... i can't give you HP #'s yet... but I am at -20 at 5200 and up and I run 48psi also...

How do you know you were running out of fuel? How can I figure this out...

the wide band showed progressive leanness even win adjusting afc and fp

[4U2NV]

Isthatatank, You really dont need any hose clamps on socketless hose if u have the correct fittings.

I did not use any on my fuel system. They where a Bit** as it was to get them on the fittings.

[horngrabber]

Quote: Originally Posted by Isthatatank

the wide band showed progressive leanness even win adjusting afc and fp

so should I wait to dyno first before deciding on installing bottle neck fix? This way i can gauge it's importance?

[Lagzilla]

Quote: Originally Posted by horngrabber

so should I wait to dyno first before deciding on installing bottle neck fix? This way i can gauge it's importance?

if you have been getting on it @ 20 psi without knowing your a/f youve probably already ownd yourself


wide bands are a necesity

[horngrabber]

Quote: Originally Posted by Isthatatank

if you have been getting on it @ 20 psi without knowing your a/f youve probably already ownd yourself


wide bands are a necesity

I have a AEM UEGO.... I've been monitoring my A/F's... no leaning whatsoever.... anywhere....

[horngrabber]

I've maintained a nice 11.3-11.8 A/F allt he way through the powerband in a 3rd gear WOT... I actually richen up in 4th and 5th... at no time do I ever see periods of leanness....