What Injectors To Support 650fwhp?
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From: Phoenix, AZ
What Injectors To Support 650fwhp? Just wondering . . . I've used some online calculators that are telling me 54 lb/hr. Does that sound about right? Any recommendations? Getting LS1-Edit soon, so I'll be able to tune for the new injectors . . . That's also rated at 43.5psi, right? If I'm running 58psi FP, does that equate to around 40 lb/hr? If so, I've heard that the SVO 42's ( also Bosch?? ) green-tops work just great and are easiest to tune. Comments? And how much are they to purchase?
- Dug
<small>[ November 06, 2002, 01:50 PM: Message edited by: ChevyNo1 ]</small>
- Dug
<small>[ November 06, 2002, 01:50 PM: Message edited by: ChevyNo1 ]</small>
Re: What Injectors To Support 650fwhp? Dug
Most online stuff will try to keep you at 85% DC or less on the injectors.
I've normally seen about .6 BSFC w/ a turbo LS1, using that....
650 hp * 0.6 lb/hr/hp / 8 = 48.75 lb/hr
That's assuming 100% on the injectors.
SVO 42's at our rail pressure are just about 49 lb/hr. I was on the edge of those at 575 RWHP, but i was more on the edge of the Walbro pump at that point
You can either bump the pressure a bit more to gain some head room on the injectors, but that will tax the pump even more. Or, get a set of 50's.
You'll still need to think about the pump in either case
Most online stuff will try to keep you at 85% DC or less on the injectors.
I've normally seen about .6 BSFC w/ a turbo LS1, using that....
650 hp * 0.6 lb/hr/hp / 8 = 48.75 lb/hr
That's assuming 100% on the injectors.
SVO 42's at our rail pressure are just about 49 lb/hr. I was on the edge of those at 575 RWHP, but i was more on the edge of the Walbro pump at that point
You can either bump the pressure a bit more to gain some head room on the injectors, but that will tax the pump even more. Or, get a set of 50's.
You'll still need to think about the pump in either case
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From: Phoenix, AZ
Re: What Injectors To Support 650fwhp? OK, so you're saying the limit of the pump that came with the Incon kit is around 575rwhp. I believe Dave said 550, but that's close enough. I don't have any plans to take the car beyond 550, so if that's the case, then wouldn't the pump be enough, as well as the 42's? What's the price difference between a set of 42's and 50's, and is one easier to tune with ls1-edit than the other, or does that make a difference?
- Dug
- Dug
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From: the moon
Re: What Injectors To Support 650fwhp? I run lucas 42's at 54psi cruise and 62psi with 11psi boost.
They run at 87% right now.
BUT, I pulled a lot fuel with ls1edit because I am adding a lot of methanol.
If I was using no methanol they would be maxed out.
I have no idea what my actual FLWHP is.
I run 67+/lbs min though, so it should be over 650.
Steve
They run at 87% right now.
BUT, I pulled a lot fuel with ls1edit because I am adding a lot of methanol.
If I was using no methanol they would be maxed out.
I have no idea what my actual FLWHP is.
I run 67+/lbs min though, so it should be over 650.
Steve
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From: Phoenix, AZ
Re: What Injectors To Support 650fwhp? OK, I plan on getting the SMC water/alky kit as well . . . I'm thinking I should be fine then with 42's if I do the same. What water/alky ratio are you using Steve?
- Dug
- Dug
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From: the moon
Re: What Injectors To Support 650fwhp? I'm currently running 16 GPH using 3 nozzles.
(90/10) methanol/acetone=50% and 50% water for the mix.
I'm running 11-11.2 as shown on a wideband under true acceleration.True a-f ratio is a bit less than this as the wideband is calibrated for a-f display using gas.Keep in mind methanol can run 30% rich vs gas at 20% rich before any power loss.
Methanol makes 7-10% more power than race gas.
But with such a low % of it being used for power it probably makes a nil difference.
Steve
(90/10) methanol/acetone=50% and 50% water for the mix.
I'm running 11-11.2 as shown on a wideband under true acceleration.True a-f ratio is a bit less than this as the wideband is calibrated for a-f display using gas.Keep in mind methanol can run 30% rich vs gas at 20% rich before any power loss.
Methanol makes 7-10% more power than race gas.
But with such a low % of it being used for power it probably makes a nil difference.
Steve
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Re: What Injectors To Support 650fwhp? Thanks Steve!!
Mark, is that part # FMS-M9593F302? I suppose that's about the best price out there . . .
- Dug
<small>[ November 06, 2002, 04:20 PM: Message edited by: ChevyNo1 ]</small>
Mark, is that part # FMS-M9593F302? I suppose that's about the best price out there . . .
- Dug
<small>[ November 06, 2002, 04:20 PM: Message edited by: ChevyNo1 ]</small>
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Re: What Injectors To Support 650fwhp? no no no call these guys (sorry not a sponsor)
http://www.jdsperformance.com/
i got a set there a few months ago for $300 oo yea!
http://www.jdsperformance.com/
i got a set there a few months ago for $300 oo yea!
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From: Barto PA
Re: What Injectors To Support 650fwhp? damn my supplied pump couldnt keep up with 450rwhp
. Put a 255inline and have more fuel then I know what to do with <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" /> .
. Put a 255inline and have more fuel then I know what to do with <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" /> . 
Re: What Injectors To Support 650fwhp? If you can wait, Seimens Deka has a 55lb injector coming. Pintle design, not the crap msd sells with the old ball and seat.
Jose
<small>[ November 07, 2002, 10:09 AM: Message edited by: JZ 97 SS 1500 ]</small>
Jose
<small>[ November 07, 2002, 10:09 AM: Message edited by: JZ 97 SS 1500 ]</small>