Dragaholic

iTrader: (180)

So if I plan on making 550-600 rwhp, then I can forget about using the L92 (40 lb.) injectors.

So are you saying that the FAST rails will or will not work?

bg-sdpc

iTrader: (4)

All parts on the L76 intake are LS2 except for the injectors which are LS7. I finally got a parts breakdown list for the intake and double checked everything just to make sure.

Dragaholic

iTrader: (180)

So the injectors on the L76 intake are LS7s, which are 40 lb. The fuel rails are the same as on the LS2. What else is there as you state that everything on the intake is the same as the LS2 besides the injectors.

Will SVO 42s and aftermarket fuel rails such as the FAST fit on the L76 intake?

Beast96Z

iTrader: (21)

Like the chart shows on that link posted, you have to keep in mind the rated capacity per fuel pressure that the injectors are rated at. The 40lb. LS7's are going to be 40lb's. on LS1 fuel pressures, but 42lb. SVO's are rated at 40psi of pressure, so at 50+lb's. of LS1 pressure, they will be 50lb.+ injectors.

Dragaholic

iTrader: (180)

Oh, I was totally aware of that. The LS7s are rated at 40 lbs. and since that is t our pressure, they will be 40 lbs. Now the SVO 42s will be closer to 47-48 since they rate them at a lower fuel pressure rate. I don't think the LS7s will support 550-600 rwhp, but then again, I could be wrong. I'd like to use the SVO 42s and play it safe and still have room to grow, but I have to verify first if they will work with the L76 intake.

Dragaholic

iTrader: (180)

Ok...I think I have this figured out.

L76 intake (complete) - LS2 fuel rails, LS7 fuel injectors, and 90mm throttle body (<-useless in a F-body as its a fly-by-wire design).

In order to run the injectors will require adapter harnesses on each injector since the LS7 injectors are an EV6 type injector just as the LS2 injectors are, while the LS1 injector is an EV1 type injector.

Now if the bosses/holes for the injectors are bigger on the intake like the LS2/LS7 and I wanted to use an aftermarket LS1 injector such as the SVO 42, I would need the Katech KAT-A4096 LS2 adapter kit.

http://www.katechengines.com/street_...tail.php?id=35

I think with the kit above, I should be able to run aftermarket fuel rails as well. Now if the LS7 injectors support the power I plan to make (600 rwhp), then I'll just leave the complete intake kit as is, minus the throttle body, and just buy the adapter harnesses for the injectors.

Does all of this sound right?

280Z28

iTrader: (1)

63lb injectors that fit the L92 rails.

http://www.thunderracing.com/catalog...d=380&pcid=163

Dragaholic

iTrader: (180)

Which ones are you talking about? 63 lb. injectors are overkill for my application. The injectors that come with the L76 complete intake kit are LS7 and they're 42 lbs.

Dragaholic

iTrader: (180)

You've stated that the intake kit comes with 40 lb. injectors and that's also what your website says. Then you just claimed that they're LS7 injectors which don't match up because LS7 injectors are 42 lbs.

MUSTANGEATER

iTrader: (10)

Why not just go with the L92 carb intake manifold? It may be a little bit of a wait but will solve your Throttlebody, Fuel Rail and Injector problems.

Dragaholic

iTrader: (180)

Because I've read the carburated version is a headache. I believe there was a recent thread about advantages/disadvanges of a carb setup.

280Z28

iTrader: (1)

Thunder Racing has 63# short style injectors.

Dragaholic

iTrader: (180)

Ok...

I need to verify what size injectors come with the L76 intake kit because that will determine if they are going to be sufficient for my motor or not. Are they LS7 injectors, if so, then they are 42 lbs. Either way, it doesn't matter what the name is, I just need to know size. They're obviously an EV6 type injector because they require adapter harnesses because the LS1 harnesses are for a EV1 type plug.

My Nick William 90mm throttle body will work, so that's a big relief.

I also need to verify if they bosses/holes for the injectors are bigger than the LS1 intake manifold as they are on the LS1/LS7 intake manifold, that way I know that I need the adapter kit from Katech.

Lastly, will aftermarket rails work with this intake?

Come to think of it, couldn't I just buy the intake bare, use my throttle body, aftermarket fuel rails, and SVO 42s and if things don't fit, I can modify as needed. The only thing that could possibly not fit is the injectors because the bosses/holes for the injectors may bigger in the L76 manifold than the LS1, which that's no big deal because Katech has an adapter kit for it. Then if the mounting stuff doesn't fit or isn't in the right location, that I'm sure can be modified. Just gota have a little fabbing skills.

280Z28

iTrader: (1)

Dude I have no idea why I double posted that info. :umm: Anyway it was based on post 18.

The injectors are stated as 40lb on the L92, and 42lb on the LS7. I imagine they are the same, with the discrepancy due to a small rail pressure difference for testing. 42lb is easily within a tolerable margin for setting your rail pressure to attain a desired flow rate. If these injectors, rails, and intake work for you, then the complete package will probably be cheaper than sourcing things separately. What do you plan to gain with aftermarket rails and SVO injectors? If you already have aftermarket rails, I'll bet you'll be able to sell them and cover some of the cost of this package.

I'll examine the injectors tonight for a part number to close the question

Dragaholic

iTrader: (180)

I don't have a set of rails so to speak. I sold my stock LS1 rails thinking I wasn't going to use them. I don't have injectors either because I didn't think my SVO 30s would be enough for the new setup. The next step up from the 30s is the 42s and I wanted to get a set that are flow matched. However, if the injectors in the kit will be enough for my application, then that will save me a lot of money because a set of aftermarket rails are $200 and the flow matched SVO 42s are $500. The ENTIRE L76 intake kit with rails, injectors, and throttle body is only $530. Brian stated that they're LS7, but then also said they're 40s, which doesn't add up because LS7s are 42s. Either way, will 40 or 42s be enough for 600 rwhp?

280Z28

iTrader: (1)

No, I'd run the 63lb ones in that case, especially if boost is involved.

Edit: If you're sitting at 575-625rwhp and run 50-55psi rail pressure, then you may be OK with the ones that come with the kit. If I were making that decision, I'd get the kit and look at the resulting injector duty cycles. The price is so much better than the alternatives I think it'd be dumb not to give it a shot unless it's obvious you're looking at the wrong ones.

Dragaholic

iTrader: (180)

No boost, naturally aspirated. I may not put 600 to the wheels because of the huge drivetrain loss, but it will still put down some pretty stout numbers.

I guess I could always buy the kit, if they aren't enough (checking duty cycle), then I could always sell them.

I believe the stock LS1 fuel pressure is around 52 lbs. I don't know of any way to increase fuel pressure other than a pump. I could install a regulator, but that would only reduce the pressure, or am I completely wrong?

280Z28

iTrader: (1)

My injector is stamped "341" on the top of the back face at like 10pt font, "6-18-08-06-035103" up the side ~5-6pt font, and this below the 341 on the back:

>PA6< 920
0280128021
12576341

The underlined part is faint, tiny, and right under the connector so I was reading upside down with a "mirror" aka the tiny end of the handle of my fingernail clippers.

Edit: It's these:
http://www.sdpc2000.com/search.asp?s...6341&doquery=1

Pressure-- up or down -- is regulated by the regulator (to a large extent). Fuel pump flow capability drops as pressure rises. 52psi should get you there, especially if the 40lb injectors are rated at 45-50psi. Heck, try stock pressure, you may get there with that.

Dragaholic

iTrader: (180)

The last number you listed is the part number for the LS7 injector. Did you buy the L76 intake kit? Just wondering if you got the injector in the kit or bought the injectors seperately. Makes a big difference.

280Z28

iTrader: (1)

L76 complete package sitting on my desk right next to me. Got one of the first ones out the door of SDPC last week.