I'm not SD yet, we're working towards changing everything over within this week.

I'd like low 13's:1 on motor and mid 12's on the bottle for AFR...


-I just noticed you are in VA now. I'm only about 3 hours away at the beach

 

What's your actual AFR right now?

With your mods, I think you'd be better off a bit richer than low 13s. You've got some pretty decent cylinder pressure there, 12.5 would probably be a safer N/A AFR and make the same, if not better power.

At any rate, you'll definitely need more injector. Those marine 8.1Ls are sold by radix guys quite a bit, usually for $250 or less (mine sold for $200 a while back).

 

on a 6.0 with a tune and bolt ons im pretty much maxed already as justin can attest. 98-102% IDC.

 

on motor it went to 10:1 almost exactly... 9.9 in a couple spots.

on nitrous it went over 17:1 the AFR map followed the Tq curve almost exactly. Its getting put on a wideband this week so we can get to work on it. I NEED me a set of those marine injectors. Are the pigtails and all good to go?? no splicing? same height as the stockers???

 

Yep, the marine injectors are a direct swap.
I take it you're running a dry shot, sounds like it's post MAF if it went that lean. How big of a shot?

 

Thats what I dont understand.... its a 150 WET shot... :headscratch: I checked my jets and everything... the pump is definitely capable of handling it, I havent put a gague on it to check pressure though, thats the next step. happening today.

 

Ya that makes sense. I was thinking 5.3L with just bolt ons will be fine although pushing the top end of the injectors at ~87%. So with a 6.0L and bolt ons should use more.

 

question - on the 4.8/5.3/6.0 did gm use all the same stock injectors?

 

yes

They had smaller injectors in 99 tho.

 

Did it just spike to 17 for a moment and then come back down? If that's the case, that's not uncommon.