MID12sSSS

Lol keep an eye out for a sale thread soon. I'll be selling the Mp112 with a ton of goodies, as well as my 317 heads, other odds and ends from my old top end and I've got a few rotating assemblies laying around that I should get rid of. Haha. Time to have a garage sale to afford the new build!

Vortec350ss

iTrader: (20)

If it's gonna be such a pain why don't you just get a powerbond OD pulley and ditch the IW? They work with a classic pin kit and the rest of the IW 8 rib kit.

Sounds like a much easier answer IMO.

Atomic

iTrader: (42)

Engine looks good!

Since you already have an FPR it should be easy, you need to pick a combo off this chart:

Lets try dual pumps @20psi with an FPR:
-dual aem 340s, 60s: ~663rwhp, inj limited
-dual 340s, 80s: ~883rwhp, inj limited
-dual 340s, 96s: ~1031rwhp, pump limited
-dual walbro 400s, 96s: ~1060rwhp, inj limited
-dual walbro 400s, 127s: ~1309rwhp, inj limited (I run this setup)

The number listed needs to be above your goals. Either way you need to upgrade both pump setup and injectors. The problem is your tank has the return style bucket, which is very small and difficult to fit dual pumps. I recommend finding a return-less style fuel tank and swap the whole thing and modify that bucket for dual pumps. The tank fits the same. I did this as well and I have some details of the bucket on this forum.

MID12sSSS

So I'll convert my whole fuel system to a returnless style? I'm definitely liking the idea of dual 340s and 80s. I'll have to read up on the "Hobbs switch" and see how I go about settin that up for the second pump. I'll see what I can do about getting a returnless bucket and start fitting it with dual 340s. You said you've done this before? Do you happen to have any pics on how you plumbed it? Do you make a "Y" to each pump with fuel hoses and connectors and have it go to the single out in the top of the bucket? Do I need to get bigger AN fuel lines to support all that fuel flow? Will I end up getting a second racetronix hotwire harness for the second pump?
Good idea on the powerbond damper. I'll look into it. I'm sure by selling the 8 rib kit I've got, it'll pay for itself anyway.
Thanks guys!!

Atomic

iTrader: (42)

The thread i made in the fuel system shows you exactly what i did. You keep it retirn but use the retunless tank and bucket. You can also mix pumps, ie, afd a walbro 400 with your aem340.

MID12sSSS

Great! I'll read that fuel system thread then!

AkSSS

LOL! I have been showing this spreadsheet to everyone! This information is awesome when doing a setup.

Mid12sSS and I are doing about the same build, just I am using a turbo and low compression and he is going supercharged and higher compression. I was showing him this chart to reference his fuel system. I am shooting for 800-850 hp out of my setup.

I currently have 60# @ 3bar FIC injectors. they are running at 4bar base fuel. I was planning on going to dual 400 walbro pumps. What injectors are you running to get the 96#? Mine currently are ~71#'s at the 4bar if I'm not mistaken?

Sorry to highjack Brandon, but we are pretty much doing the same thing.

Atomic

iTrader: (42)

The injector size needs to be the 4 bar rating so you need to know at what pressure your injectors are rated. if they are at 3bar then multiply their 3bar rating by (4/3)^.5 to get the rating at 4bar, so 60*(4/3)^.5=69.28

MID12sSSS

So I'll want 80lb injectors as 4 bar with the dual 340s to support 883hp? If I find injectors that are 80lb at 3 bar, they're still okay because they'll be 92.37 at 4bar?

Atomic

iTrader: (42)

Yeo, exactly.