Injectors
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Banned Scammer
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From: Southern Indiana
Injectors I have a Bolt on LS1 with the 26lbs injectors with 89K miles on them
would it help anything if i were to put the 28lbs injectors with 42K miles on them?
Mods
LTS, ORY, LMII, LID, Ported TB, free mods
would it help anything if i were to put the 28lbs injectors with 42K miles on them?
Mods
LTS, ORY, LMII, LID, Ported TB, free mods
You'd need to get it retuned.
How much is the set of 28#'s going to cost you? How much would a new tune cost?
If your AFRs are still good, I'd recommend just getting the injectors you have cleaned. ...unless you will be looking for more power soon.
How much is the set of 28#'s going to cost you? How much would a new tune cost?
If your AFRs are still good, I'd recommend just getting the injectors you have cleaned. ...unless you will be looking for more power soon.
Thread Starter
Banned Scammer
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From: Southern Indiana
well i didnt know if there would be any benefits. i got them off of a friend who totalled his car and figured that he wouldnt be able to sell them.
i will be around 350rwhp and i will need a tune reguardless for other mods.
so.. your suggesting i sell theM?
i will be around 350rwhp and i will need a tune reguardless for other mods.
so.. your suggesting i sell theM?
Staging Lane
Joined: Jun 2009
Posts: 75
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From: ny
im getting confused the poster asked about 26 vs 28lbs you say 24's.. Dont forget our cars run at 58psi fuel pressure so a 26 is really a 22 and a 28 is really a 24. so do your calcs based on that.
My bad. Shows how good my attention is this morning.
We rate all of our injectors at 43.5 psi, which is industry standard.
I knew the LSx's run at 58psi, so I was making the assumption the 24# (should have been 26#s) was the 3 bar flow rating.
For ~350whp, you are going to need about 28# of fuel per injector @ 90% IDC (my estimates are conservative, I'd rather be on the safe side).
We rate all of our injectors at 43.5 psi, which is industry standard.
I knew the LSx's run at 58psi, so I was making the assumption the 24# (should have been 26#s) was the 3 bar flow rating.
For ~350whp, you are going to need about 28# of fuel per injector @ 90% IDC (my estimates are conservative, I'd rather be on the safe side).
Staging Lane
Joined: Jun 2009
Posts: 75
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From: ny
My bad. Shows how good my attention is this morning.
We rate all of our injectors at 43.5 psi, which is industry standard.
I knew the LSx's run at 58psi, so I was making the assumption the 24# (should have been 26#s) was the 3 bar flow rating.
For ~350whp, you are going to need about 28# of fuel per injector @ 90% IDC (my estimates are conservative, I'd rather be on the safe side).
We rate all of our injectors at 43.5 psi, which is industry standard.
I knew the LSx's run at 58psi, so I was making the assumption the 24# (should have been 26#s) was the 3 bar flow rating.
For ~350whp, you are going to need about 28# of fuel per injector @ 90% IDC (my estimates are conservative, I'd rather be on the safe side).
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I use our fueling calculator here: http://www.deatschwerks.com/fuel-calculators/
400 horsepower
8 injectors
.5 BSFC
90% IDC
= 27.8 lb/hr or 291.7 cc/min
400 horsepower
8 injectors
.5 BSFC
90% IDC
= 27.8 lb/hr or 291.7 cc/min
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Verdad Gallardo Staging Lane
Joined: Jun 2009
Posts: 75
Likes: 0
From: ny
I use our fueling calculator here: http://www.deatschwerks.com/fuel-calculators/
400 horsepower
8 injectors
.5 BSFC
90% IDC
= 27.8 lb/hr or 291.7 cc/min
400 horsepower
8 injectors
.5 BSFC
90% IDC
= 27.8 lb/hr or 291.7 cc/min
Staging Lane
Joined: Jun 2009
Posts: 75
Likes: 0
From: ny
If he has 28# OEM injectors, they should be enough to get him to power he's wanting to make. ...but it is going to be on the edge of what that injector can do.
I was mistaken about the 26# injectors, as I made an incorrect assumption about the flow rating fuel pressure.
The 28# (@4 bar) should be just enough. If he'd like some extra head room to get the IDCs down, the next size up would be recommended.
I'm not even trying to sell the guy my injectors. Just trying to be helpful. The smallest injector I current have available is a 42# (@3bar) which would be way overkill.
I was mistaken about the 26# injectors, as I made an incorrect assumption about the flow rating fuel pressure.
The 28# (@4 bar) should be just enough. If he'd like some extra head room to get the IDCs down, the next size up would be recommended.
I'm not even trying to sell the guy my injectors. Just trying to be helpful. The smallest injector I current have available is a 42# (@3bar) which would be way overkill.
Thread Starter
Banned Scammer
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From: Southern Indiana
well the way i look at it is... GM replaced the 26s of the 98-99 models with 28s on the 00-02 models.
i wont be doing any internals and only bolt ons with the ls1
and many people run OEM 28s with bolt ons... some even with the 26s.
i have the 28s because i was going to go with an LS6 (however they were discontinued) so i have them just laying around.
when i send my pcm to frost i will just specify that i will have the 28s installed and install them while the pcm is out.
i wont be doing any internals and only bolt ons with the ls1
and many people run OEM 28s with bolt ons... some even with the 26s.
i have the 28s because i was going to go with an LS6 (however they were discontinued) so i have them just laying around.
when i send my pcm to frost i will just specify that i will have the 28s installed and install them while the pcm is out.
26 vs 28 Injector duty cycle would be ~5% reduction with all other things the same.
would it help, well it would give you more breathing room & possibly prevent any fueling problems from the smaller injectors getting "stuck". I have known people with 26# injectors with mods you have maxing them out, and also running a high duty cycle with the 28LB injectors. What do you expect? The setup that GM sells is the bare minimum that will work with what the car has...and everyone is about saving money.
If you have 28LB setting around and can swap them for the 26# while you are getting a tune, go for it.
