LS7 Fuel Injectors

[TAQuickness]

Anyone play with these yet?

I was browsing thru ls1tech and read they flow between 39-42 lbs/hr and require electrical adapters. Otherwise they seemed like a cool idea because they will have* a known IFR and IOS table...

(As soon as we get to see the tune ;))

[Bruce Melton]

Anyone play with these yet?

I was browsing thru ls1tech and read they flow between 39-42 lbs/hr and require electrical adapters. Otherwise they seemed like a cool idea because they will have* a known IFR and IOS table...

(As soon as we get to see the tune ;))
I had a set of LS2 injectors briefly. They are the same size but 32#vs42# and use same connector. I concluded it was not worth it. The electrical is one thing and they are different length plus bottom o-ring is different dia. I caved and went to SVOs. which are peachy.

[John Skiba]

I had a set of LS2 injectors briefly. They are the same size but 32# and use same connector. I concluded it was not worth it. The electrical is one thing and they are different length plus bottom o-ring is different dia. I caved and went to SVOs. which are peachy.

They are 32# at 4 bar. Different then an 30# or 32# SVO injector which is a lot larger at LSx 4 bar pressures.

Hmm, LS7 injectors 42lb at 4 bar... who's got a copy of the LS7 table?

[redhardsupra]

hmm? svo 30s are only 34.6# at 4bar... so the vette is doing 500hp on injectors smaller than svo 30s? ouch, i will have to eat a lot of my previous words on injector capacities....
however, as always TAquickness gets props for quick thinking on his feet. go with the known/oem is always a good policy, let them do the legwork

[ringram]

I think the injectors mentioned were ls2 6L rather than ls7's 7L RHS :)

[TAQuickness]

either way, it would be nice to have a set of injectors with known calibration tables :D

[Bruce Melton]

I think the injectors mentioned were ls2 6L rather than ls7's 7L RHS :)

Yes, but same configuration:

http://home.new.rr.com/meltn/ls1-ls2inj.jpg

[redhardsupra]

either way, it would be nice to have a set of injectors with known calibration tables :D
TAQuickness, you are my inspriation! :master: as i'm falling asleep yesterday, I thought the same damn thing, and then it hits me:
these SVO injectors have to come from somewhere, they gotta be 'stock/known' in some sort of setup. so could someone please figure out what car the 42s come in stock, and then 'hop the fence' to a ford site/get ford tuning software and liberate some numbers for us?
we could really use the rated pressure/voltage offsets to be a solved issue...

[joecar]

You get sleep....?:muahaha:

[GMPX]

Hmm, LS7 injectors 42lb at 4 bar... who's got a copy of the LS7 table?

5.2588
5.2588
5.2588
5.2588
5.2588
5.2588
5.2588
5.2588
5.2588
5.3354
5.4121
5.4842
5.5564
5.6014
5.6463
5.7001
5.7541

:D

[John Skiba]

5.2588
5.2588
5.2588
5.2588
5.2588
5.2588
5.2588
5.2588
5.2588
5.3354
5.4121
5.4842
5.5564
5.6014
5.6463
5.7001
5.7541

:D


Interesting.... no change from 0 to 40kpa or did the keyboard stick Ross? :)

Anyways, they look to be about:

36.09lb @ 43.51psi (100% dc)
41.68lb @ 58.02psi (100% dc) - LSx rail pressure
5.25 g/sec @ 58.02psi (100% dc)

667 Crank HP 100% DC .50 BSFC
533 Crank HP 80% DC .50 BSFC

445 Crank HP 80% DC .60 BSFC (or way to small for any forced induction ;) )

*Note: numbers are not exact spec of injector just calculation of injector table

Now lets see the voltage table Ross. ;)

[John Skiba]

TAQuickness, you are my inspriation! :master: as i'm falling asleep yesterday, I thought the same damn thing, and then it hits me:
these SVO injectors have to come from somewhere, they gotta be 'stock/known' in some sort of setup. so could someone please figure out what car the 42s come in stock, and then 'hop the fence' to a ford site/get ford tuning software and liberate some numbers for us?
we could really use the rated pressure/voltage offsets to be a solved issue...

This is already done and a know. That is not an issue. AEM's software even has a nice wizard. However, the LSx voltage table is a lot more complex and we have been mathmatically trying to calculate the missing portion. GM is accounting for a lot more with their PCMs then the old ford stuff did. There are threads here that go into lengthy discussions about all this and people have been "hopping the fence" since the lsx engines first came out. ;) Some even prior to those... LT1's and earlier... :)

[TAQuickness]

Thanks for the info Ross... Now to make us all creamy, how's the IOS table look?

John, I was poking around in the AEM software the other day. As you noted, the lsx PCM is a little more detailed with the IOS table. Any idea what the vacuum reference is with the AEM table?