MS3 safe with stock injestors??
03-19-2006, 04:56 AM
#1
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MS3 safe with stock injestors?? is it safe to run stock injectors with an MS3 and a tuned car?? im prolly gonna upgrade to bigger ones later but gotta wait till my car budget account builds back up.
03-19-2006, 06:09 AM
#3
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That is a lot of cam. You might be able to tune for the correct A/F Ratio with the stock ones, I'm not sure. Allthough even if you can it might shorten there life span of the injector because of the increased pulse rate to achieve the correct A/F ratio. This will increase the wear on the injectors.
I went with larger injectors for that reason and my cam is much smaller that the one you are planning.
Good luck,
I went with larger injectors for that reason and my cam is much smaller that the one you are planning.
Good luck,
03-19-2006, 08:27 AM
#5
With 28.8's I was running 110% duty cycle on my torquer + DIY heads at a dead on 13:1 air/fuel @6800 RPM. Might look into some cheap or even used injectors. some red top 30s would be nice if you plan to stay N/A. Some green top 42's if you want room to upgrade in the future. Not sure how the stock pump will hold up against the added flow.
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03-19-2006, 09:38 PM
#9
Yeah, you might be pushing the boundaries a little bit. Hope it doesnt lean out out on you in the upper RPM's. I think that you can probably slide by on them. I believe that they are actually bigger than the 99-00 injectors if that is correct.
03-19-2006, 09:51 PM
#11
Originally Posted by orangeapeel
The SVO 30# 's would be an excellent choice though also. they are rated for a lower fuel pressure, so I think that they would actually be around 36# all said and done on an LS1.
03-20-2006, 06:12 AM
#15
TECH Senior Member
Originally Posted by GuitsBoy
Yes, 36 Lbs at 58 psi, assuming the 30 Lbs rating is at 40 psi. I first though it may have been rated at 43.5 but when i scaled from 40, my top end fueling fell inline again.
A lot of poeple automaticaly blame injectors, not taking into consideration fuel supply.
The f-bodies have the regulator close to the tank at the back and at wot, you'll see as much as 5>7 psi drop at the rail.
The trick is a good pump, a harness that uprades the voltage to the pump and an adjustable FPR at the rail.
If you're able to have 62 psi at rail then maintain 58 at WOT, the 28.8 will handle 430>450 rwhp with no issues.
My 30's are handling 580 rwhp +/- at 98% duty cycle but that is on juice.
03-20-2006, 07:48 AM
#16
Originally Posted by PREDATOR-Z
Actually at 58 PSI the 30 SVO are 34.54
A lot of poeple automaticaly blame injectors, not taking into consideration fuel supply.
The f-bodies have the regulator close to the tank at the back and at wot, you'll see as much as 5>7 psi drop at the rail.
The trick is a good pump, a harness that uprades the voltage to the pump and an adjustable FPR at the rail.
If you're able to have 62 psi at rail then maintain 58 at WOT, the 28.8 will handle 430>450 rwhp with no issues.
My 30's are handling 580 rwhp +/- at 98% duty cycle but that is on juice.
A lot of poeple automaticaly blame injectors, not taking into consideration fuel supply.
The f-bodies have the regulator close to the tank at the back and at wot, you'll see as much as 5>7 psi drop at the rail.
The trick is a good pump, a harness that uprades the voltage to the pump and an adjustable FPR at the rail.
If you're able to have 62 psi at rail then maintain 58 at WOT, the 28.8 will handle 430>450 rwhp with no issues.
My 30's are handling 580 rwhp +/- at 98% duty cycle but that is on juice.
03-20-2006, 10:24 AM
#17
TECH Senior Member
Originally Posted by GuitsBoy
FRPP is the same as SVO, right? Ive got the FRPP 30's and im fairly certain theyre 36#. I originally tried scaling from 43.5 which put me at 34# like you say, and my a:f wend rich at 12.4:1 across the board. I then scaled up from 40 psi which gave me 36# numbers, and my a:f went right back to a solid 13:1, exactly where it was with the 28.8's. Im just passing along my experience as I had a very solid and dialed-in AFR before the inj swap. Albeit my part throttle did go a little bit lean, but not by much.
So far I've not been able to 100% confirm that they are rated at 3 BAR
One item that I found interesting is the variation in BSFC value
I believe we use .50 for LS1's but I also found conflicting info on that since this requires live lambda testings and can vary from motor to motor due to SCR variations etc... We could be using .40 as well since we have port injectors.
So I guess I'll keep searching .......
Your experience sounds convincing, but I'm still searching.
I found that accel rates theirs at 44.1 psi (3 BAR) and that they recommend direct swap of their 30's with stock 30 SVO/FMS FORD running cars/trucks
Hmmmmm.
Kenne Bell supercharging rates their supercharged FORD recommendation at 43.5
HMMMMM
