details: 03 Tahoe, originally a flex fuel 5.3 but now a stock (for now) LQ9 6.0 with a Whipple.


I've been searching old threads and if I understand everything I read, I'll be using the Aeromotive 340 (#11140) and 60lb injectors but I haven't seen anyone mention which brand 60lb injectors they're using and I want to make sure I don't waste my money buying sub par injectors for whatever reason. I prefer to order though summit but if they don't sell the injectors I should get then I would appreciate a source for whatever you recommend.


also, I just wanted to get a second opinion on this. I don't have the Tahoe yet since it went from the dealership to the shop but I did take a few pics and I'm pretty sure I see the two fuel lines just under the cover that tells me its a return style fuel system. Can anyone check this pic out and tell me if I'm correct? Thanks

1dfb0882.jpg?t=1343190463

 

Yes, its a return style system. I will be selling some Fast 65# injectors soon. and I have tuning data for both hpt and efi live.

 

Perfect, thanks.

I assume you're maxing them out with all your mods, but on my stock setup they will be adequate? When are you pulling them out?

 

65lb/hr injectors should be good for at least 650hp at stock pressure.

 

Yea, they were maxed at 5300 rpm lol. Got some 103# coming in on Saturday and that's when I'm swapping them out.

 

Siemens Deka's, they have been used for years in tons of different applications and I doubt you will find anywhere close to the amount of tuning info online for any other injector.

 

You will have to ditch the two additional whipple injectors and get a custom tune.

 

yeah, I read that some where on here and that's what got me looking into the bigger injectors.

I like the little bit I just read about the Seimans Deka injectors. I'll do some searching to figure out which ones I need but if you happen to know off the top of your head could you let me know? thanks.

 

One thing to consider, the Siemens Deka Injectors are taller then the stock MultecII injectors. Due to the location of where the Whipple mounts, make sure you can raise the fuel rail up about 5/8" and still have clearance.

 

Which Injectors were maxed at 5300?