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View Full Version : 8.1L Bucket, Boost-a-pump & Walbro 255...



JayC'sG
05-09-2009, 09:06 PM
There are a TON of threads on this combo, but after spending quite some time searching, I can really find a solid answer to the max power ran with this combo. I was at 550@ the tires w. this combo. I ran it for a year w/out issue. I dropped a valve and am in the middle of a rebuild and am curious what kind of power levels can be achieved w/ this setup.

I'm assuming since the bucket isn't going to be sucked dry, the limiting factor at this point will be the pump, so I can use the Walbro 255lph pump chart? I'm running 60# injectors currently.

Thoughts?



jmd
05-10-2009, 03:59 AM
i have seen 600 rwhp with a maggie with that set up with a kennybell boost a pump. after that you need a return style system. lonnie's is the best set up.
JayC'sG
05-10-2009, 11:02 PM
I will need to do something as I'm in the midst of a rebuild (all forged internals) and plan on turning the boost up considerably. I doubt the fuel system will be up to handling 650 at the tires.

I looked on Lonnie's site and saw a few options. There is a $675 dual in tank pump option (double pumper) that looks pretty decent. Although I'm not sure what power levels it supports.
jonathan8751
05-11-2009, 12:27 PM
lonnies double pumper kit is what I am going with for my 1k rwhp build. if your like me upgrade to the best because youll never be satasified...never
jmd
05-11-2009, 02:12 PM
lonnies double pumper kit is what I am going with for my 1k rwhp build. if your like me upgrade to the best because youll never be satasified...never

good advice. get the whole kit from him.
BBGTO
05-12-2009, 12:58 PM
I'm at 640rwhp w/ this exact combo (walbro, 8.1, KB). I do, however, also have Meth inj.
JayC'sG
05-12-2009, 03:47 PM
I'm at 640rwhp w/ this exact combo (walbro, 8.1, KB). I do, however, also have Meth inj.

I don't really know if that's a factor, as long as the fuel pressure is where it needs to be. Maybe I'm wrong though.

I just got off the phone with Lonnie, and the whole system is what I am planning on going with. It's just that almost $2K is a hard pill to swallow for a fuel 'upgrade'. But, that system will hold up to anything.

I'm still curious what the current setup will hold. All else fails, if I do the lonnies system, I can always sell the current setup. Stupid horsepower game...
ArthurJGuy
05-13-2009, 09:44 AM
Also curious about this setup...
strasser_3
05-13-2009, 04:01 PM
This is what I'm setting up now in my car. I'm looking to be around 650rwhp. 200hp wet shot.
strasser_3
05-13-2009, 04:02 PM
Also someone should make a sticky on the 8.1 bucket upgrade. I just got mine and was searching for a how-to.
Jizz
05-13-2009, 06:18 PM
Holy crap what times are you guys running these days with these rwhp numbers?

I have been out of the loop for about 1.5 years now and would like some closure to the times I put down with my (now sold GTO)...

Thanks
JayC'sG
05-13-2009, 08:43 PM
Holy crap what times are you guys running these days with these rwhp numbers?

I have been out of the loop for about 1.5 years now and would like some closure to the times I put down with my (now sold GTO)...

Thanks

Never took it to the 1/4 mile track before the current build-up, but I ran 177mph at the TX mile before my valve spring went sprung.
BBGTO
05-14-2009, 02:17 AM
Also someone should make a sticky on the 8.1 bucket upgrade. I just got mine and was searching for a how-to.

8.1 BUCKET UPGRADE WITH PICS (http://www.ls1gto.com/forums/showthread.php?t=671 59)
BBGTO
05-14-2009, 02:18 AM
Holy crap what times are you guys running these days with these rwhp numbers?

I have been out of the loop for about 1.5 years now and would like some closure to the times I put down with my (now sold GTO)...

Thanks

.....coming soon :)
SOFAKINGGR8
05-14-2009, 01:37 PM
BBGTO, are you tuned for meth, i.e. is ur timing advanced on the meth. I'm trying to make this work on twin turbos.
But i think they require more fuel pressure than blowers do... thoughts?
bondosgto
05-15-2009, 01:19 AM
Also someone should make a sticky on the 8.1 bucket upgrade. I just got mine and was searching for a how-to.

i asked for that to be sticked the day this section was added.
BBGTO
05-15-2009, 02:27 AM
BBGTO, are you tuned for meth, i.e. is ur timing advanced on the meth. I'm trying to make this work on twin turbos.
But i think they require more fuel pressure than blowers do... thoughts?

Yes, I am tuned on the meth injection.

Fuel pressure req. is the same. you want to see 55-62 or so psi. If you start to drop below around 50-52 be careful. I was dropping to about 46 at wot. That was when I switched to the 8.1 and added the KB to my setup (orig. had the 60lb'ers and LPE intank 255).