WALBRO 525 LIMITS

[gnmaster2004]

ok that makes way more sense

It went 10.12 with the 6266

 

[Mr.Spool]

9.87 @ 134 single 525 pump

For those that want to try this
What duty cycle and pump pressures were you at?

 

[gnmaster2004]

I didn’t log any data

 

[Mr.Spool]

I didn’t log any data

We put the squeeze to dynoman car when it was on the old combo
Duty cycle on 120s was well over 90% nearing 100 with boost in the 35+psi range.
It did it
but....there was no cushion and the conditions were good.
His car is an little heavier.
We had more pump it was not a 525 he had more fuel sytem than injector.
It was on a stock computer with a very small correction window.
Upgraded the computer and decided from a safety factor to go bigger on the injector to get that cushion back

 

[gnmaster2004]

We put the squeeze to dynoman car when it was on the old combo
Duty cycle on 120s was well over 90% nearing 100 with boost in the 35+psi range.
It did it
but....there was no cushion and the conditions were good.
His car is an little heavier.
We had more pump it was not a 525 he had more fuel sytem than injector.
It was on a stock computer with a very small correction window.
Upgraded the computer and decided from a safety factor to go bigger on the injector to get that cushion back

I’m still running the stock computer . I need to upgrade

 

[Mr.Spool]

I’m still running the stock computer . I need to upgrade

Are you on 120s?

 

[gnmaster2004]

Are you on 120s?

Yes

 

[Mr.Spool]

Yes

Yeah your at the end duty cycle wise.

 

[3.8 LA LEY]

 

[3.8 LA LEY]

Originally I wanted to throw 28-29lbs at this thing but its moving along quite nicely even at 21lbs hahah

fuel pressure is solid glad i went with dual 340's for that extra cushion

I cant imagine this 6266 with 28lbs behind it

 

[BEATAV8]

Nothing lasts forever...... This 525 pump was 5 years old and it was giving up.
It did a great job when it was younger though.

 

[BEATAV8]

No messing around.... went ahead and installed a twin 525 pump hanger kit from Racetronix. She's strong now.
There's a bump in the blue where the 2nd pump is ramping in. I can tweak that by having it come in a bit later.
It's always nice to see fuel pressure that's on the strong side.

 

[Peacock]

My old car made 682whp with a single 525 and volt booster on E85. Maintained fuel pressure with no issues.

 

[BEATAV8]

This snip is from our Buick V6 powered station wagooon messing around on the street at the turbo farm last week. This pump is about 2 years old and still running strong (quite strong it seems).
525 pump on a chevy Astrovan hanger. -6AN feed & return. 120LB injectors. Racetronix regulator with fuel pressure sensor. Racetronix fuel filter. E85. 15.4V (Casper volt booster). 10 gauge power feed and a 10 gauge ground wire to the battery. Racetronix "HD" in-tank wiring too.
Ran the injectors past 90% duty.