I just got my SAFC installed and my friend was telling me they will only go up to 550s so im just wondering if anyone knows of anything different.
How big of injectors will the SAFC II handle
car_freak66
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I just got my SAFC installed and my friend was telling me they will only go up to 550s so im just wondering if anyone knows of anything different.
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660's
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Don't go above ~660's or you'll get way too much timing advance, and knock when trying to compensate.
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This is a good question to ask, I am currently on 550's and safc II, I think I can max them out with my current set up and was htinking about upgrading. My friend has a set of "pte 780's" or something in the 7's, does that mean I will absolutly have to upgrade to another tuning device?
Josh
Josh
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TalonTSiAWD 723 said:
Where did you pull that # out of? I personally have run 780s on my 1g and i have a friend that ran 880s on his 1g using an safc 2 to tune. Granted we both used keydriver eprom chips as well but still. I think the capability of tunning is endless as long as you dont over shoot by to much sizewise and need to take out to much fuel. The only difficult part is getting it to idle and drive clean at low rpms with larger inj without the use of a chip.
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Well shit now I'm sure myself and the original poster are confused.
I guess link it is.
Josh
I guess link it is.
Josh
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BABAGANOOSH said:
Well this was before dsm link was an option... IMO its smarter to just sell the safc and put the $ towards the dsm link rather than spending the $ on the chip that isnt reprogamable for dif setups. 3 years ago i didnt really havethat option and just ordered the chip and tuned with the safc. Had no issues with the larger size inj at all and my buddy just didnt want to get a dsmlink and put down almost 600hp with a 3065, 880 inj and tuned it with a keydriver chip and safc. No issues atall.
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I do believe the original poster was not thinking about including a chip.
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Without any form of injector compensation through an eprom chip you can run no larger than 680cc injectors comfortably.
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Define comfortably please90_talon_matt said:
no really it all depends on the setup and the goals of that setup. i wouldn't use anything larger then 550's with an SAFC with the experiances i have had in the last 6 years working with 4G63's. But with a 1G you have a lower compression ratio (7.8:1 vs 2G 8:1 vs my 9:1) and the ability to retard the base timing a degree or two then you may have some room to play with.
2G: don't wanna mess with the SAFC with bigger then 580's
1G: you might get away with 660's but
FOR ALL: DSMlink is the way to go right off the bat save yourself the trouble
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Wow... Talk about all the misinformation.
The S-AFC 2 can compensate up to 50%, there for you can run 50% larger injectors, not saying this is the correct way to do it, but that is all it can compensate.
People have run anywhere from 550s to 880s on the stock ECU with the AFC. Fuel pressure plays a big part as well. Get a wide band and go tune. If you need larger injectors, upgrade if you have room... If not, then get a different fuel controller.
The S-AFC 2 can compensate up to 50%, there for you can run 50% larger injectors, not saying this is the correct way to do it, but that is all it can compensate.
People have run anywhere from 550s to 880s on the stock ECU with the AFC. Fuel pressure plays a big part as well. Get a wide band and go tune. If you need larger injectors, upgrade if you have room... If not, then get a different fuel controller.
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The DSM ECU seems to be very very touchy when removing that much fuel. Flat out it results in way too much timing advance. 680cc injectors are as large as you can easily tune with a piggy back.EclipseRST said:
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If you do the math then you and him are saying the same thing. 680's max. 450/2 + 450 = 675.90_talon_matt said:
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i personally had a pretty difficult time tuning my FIC 650s on an SAFC blue screen with my Bullseye VTrim only running about 10 psi. Granted, I have 2g pistons on 1g rods so that may have had an effect, but I was getting mad timing up top which caused me to knock... I would use an AFC to tune like 550s-580s but anything above that, I recommend either a chip or an Ostrich running Tunerpro... For some reason, I just like the idea of my ECU seeing the CORRECT airflow reading... seems like it makes tuning a lot easier to me.
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on the spyder I ran 660s and B16g turbo with FMIc and all..no problem what soever with a safc 2.
Now I am on the 1g and will do same turbo but 680s so I am going ECU+ instead probably..reason I dont have a eprom ECU and its toomuch to shell out for both tunigprog and ECo + eprom. Hope it willwork out
Now I am on the 1g and will do same turbo but 680s so I am going ECU+ instead probably..reason I dont have a eprom ECU and its toomuch to shell out for both tunigprog and ECo + eprom. Hope it willwork out
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I know what you're saying but, look at how much fuel you have to remove for 680cc injectors. Technically you can go further with the S-AFC percetage wise, especially when mated with a 2g MAS on a 1g.RE's 97 gs-t said:
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Moved to General Tech.
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I ran 850's with mine, but I also had a keydiver
If you have something to set the base with (keydiver or GMaft) then you can use an SAFC for pretty much any injector...But as has already been expressed, 650's is probably pushing it using ONLY an AFC to tune.
If you have something to set the base with (keydiver or GMaft) then you can use an SAFC for pretty much any injector...But as has already been expressed, 650's is probably pushing it using ONLY an AFC to tune.
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