Are 450s a bolt in things for an auto (w/380s)

[99 gst 420a dsm]

I just wanted to know if i can just plug and play with 450cc injectors in my 1991 TSi awd auto, Its has 380cc injectors and a 13g, and im swapping the 13g for a 14b and i wanted to do the same with the 450s and the 380s.

 

[SpoolnTsi]

Yes but you will need a fuel controller of some sort to control them

 

[99 gst 420a dsm]

Thats what i meant, are they plug and play? thats rediculous if you need an AFC to run 450s, but if so id like to know

 

[Kinetic Boost]

You could also use a ECU from a M/T.

 

[98spydert]

Thats what i meant, are they plug and play? thats rediculous if you need an AFC to run 450s, but if so id like to know

That's what he just told you... and it's not rediculous, it's common sense if you're asking in the "advanced 4G63t Tech" forums.

Yes they will fit the rail and manifold andthe harness will plug right into them if that's what you're asking.

 

[DSMJim]

Yes they plug right in.

They are too large for your ECU however so you need some way to control them. You simply can not put a larger injector in your car that it's not designed to have and expect it to work properly. That is not how any car works. If you plan on properly controlling the injector you WILL need an SAFC or similar fuel computer.

They would physically work without an SAFC but your car will run very rich which is not good for your motor at all. Gasoline is an anti-lubricant and washes down the cylinder walls taking away lubrication. Not only that your oil will become saturated with gasoline over time reducing how effective oil is requiring more frequent oil changes. It's just a bad idea with out a fuel computer all around. Never mind your car will be slower from the air fuel ratio being totally out of wack.

 

[99 gst 420a dsm]

My escort nor my mx3 required the use of an AFC to run larger injetcors, i had to run an afpr to assure 20psi of pf at idle, at any rate, sounds like 450s are a waist of time and 550s should be used! and an AFC must be purchased. Thanx for the help, problem solved

 

[SpoolnTsi]

My escort nor my mx3 required the use of an AFC to run larger injetcors, i had to run an afpr to assure 20psi of pf at idle, at any rate, sounds like 450s are a waist of time and 550s should be used! and an AFC must be purchased. Thanx for the help, problem solved

ummm............. how the hell do you plan on tuning then??? zeesh......id like to see this

 

[98spydert]

Sounds like you got it all worked out. Why the hell did you post this crap if you knew the [wrong]answer anyways?

 

[turbohounds]

Sounds like you are getting lots of bad information. The 390s can be directly replaced with 450s, all you need is a datalogger. There is enough tweaking room in the stock MAF to get your fuel trims very close (and yes, I did this on my '92 before I had the SAFC). The fine tuning won't be there, but it will work. 550s on the other hand, won't work without better controls.

 

[SpoolnTsi]

Sounds like you are getting lots of bad information. The 390s can be directly replaced with 450s, all you need is a datalogger. There is enough tweaking room in the stock MAF to get your fuel trims very close (and yes, I did this on my '92 before I had the SAFC). The fine tuning won't be there, but it will work. 550s on the other hand, won't work without better controls.

Id bet it also ran a ton better once you got the AFC in and did some tuning. No one ever said it wouldnt work. But it isnt going to run any better with the 450's and no fuel controller than with the 390's alone. Hell hed be better off to skip the 450's and just get a AFC and max the 390's out. Either way, a fuel controller is needed. End of story

 

[turbohounds]

Honestly, only at idle, but yes I agree - do it right and get some kind of real fuel controller, even if it is a MAF translator.

Id bet it also ran a ton better once you got the AFC in and did some tuning. No one ever said it wouldnt work. But it isnt going to run any better with the 450's and no fuel controller than with the 390's alone. Hell hed be better off to skip the 450's and just get a AFC and max the 390's out. Either way, a fuel controller is needed. End of story

 

[99 gst 420a dsm]

I didnt say an AFC was out of the question, i just didnt know if i had to do it now, I just picked up a palm and hotsync but i dont kow how to use it yet, i dont think you can tune with it can you, will this help me?

 

[kpt4321]

My escort nor my mx3 required the use of an AFC to run larger injetcors, i had to run an afpr to assure 20psi of pf at idle

A ####ing AFPR is a method of fuel control!

If you installed larger injectors and then turned the fuel pressure down, then all you did was end up with the same size injectors as you had beforehand.

Basically, you paid money for a fuel pressure regulator and injectors, and didn't get anything from it.

 

[kpt4321]

I didnt say an AFC was out of the question, i just didnt know if i had to do it now, I just picked up a palm and hotsync but i dont kow how to use it yet, i dont think you can tune with it can you, will this help me?

I just searched for "palm datalogger" and got the following results:

http://www.dsmtuners.com/forums/search.php?searchid=293154

Enjoy.

None of this is advanced at all, by the way. You need to get a whole lot familiar with the search button.

 

[99 gst 420a dsm]

i will have to start using the search more often, there are to many @$$holes in this forum to ask questions!

 

[Maglin]

i will have to start using the search more often, there are to many @$$holes in this forum to ask questions!

Well Kyle isn't a but whole as you put it. People don't like to be asked the same thing over and over again. Hell I almost exploid at my wife when she says something more than 3 times to me. So ya. Their is a search button for a reason. If you can't find something then ask. Beware that along with you answer you might get flamed. And don't ever post the same question in multipule forums ie.. engine per. and advanced tech. that will be a sure fire flame front their.

 

[98spydert]

Not so much being asked the same question over and over, but giving the same answer and having some punk saying he was right and our answer is rediculous

Here's everything you'll need here at tuners:
Search Newbie Forum VFAQ
AND
You can treat people with respect, especially when they try to help you.

 

[Maglin]

Not so much being asked the same question over and over, but giving the same answer and having some punk saying he was right and our answer is rediculous

Here's everything you'll need here at tuners:
Search Newbie Forum VFAQ
AND
You can treat people with respect, especially when they try to help you.