Just as the title says. How much HP can they support if you raise the fuel pressure too (kinda overdrive the injectors)?
final5-0 said:Chris
I'm gonna predict you've opened up a Can O Worms with this thread and you're gonna get a lot of opinions.
Here is mine
Maf first
I almost made it to 300rwhp with mine before it pegged.
The maf is all about air flow and really has nothing to do with inj size if you look at it from how things really work or how Ford does it in the first place.
A ball park answer to your Q might be in the range of say 285 to 310rwhp. Several things makes the answer one of those ... it depends on kinda things.
Now for the inj's
Let me be the FIRST to tell you ...... 300 hp.
You see it all the time on these forums and to that I say ................
that is misleading info at best
The reason I feel so strongly about that is ..................
That is motor hp and most of us Stangers think in terms of wheel hp.
Think about it as it really is!
15% driveline loss is 300 X .85 is 255rwhp
20% driveline loss is 300 X .20 is 240rwhp
When you look at it like that ...... it kinda makes you think about the fact that .......................
Ford put 24's in the Cobra.
IIRC, I think I've seen some say an auto trans combo will sap a bit MORE than 20% but I think you see where I'm goin with this by now.
As for the elevated fuel pressure thing ................
Yes it is true, elevated pressure will make the inj act bigger but IMHO ........
That method is messy & unstable cause the pcm is gonna try to correct things and over time........................
your final af ratio may not REALLY be what it was when you had it set on the dyno.
Grady
Black95GTS said:I guess age brings wisdom......
- Adam
94-302-vert said:Ok,
Thanks Grady.. Kinda what I thought and here is why I ask. Bud of mine has an H/C/I (GT40 cast iron, unknown, TFS) & S-trim w/ AODE car. he still has the 19# inj with higher presssure and the stock MAF. He still needs to be dyno tuned. BUT he ran some HP numbers with a g-tech and basically got 260-280ish on the g-tech. So we are trying to figure out what else needs to be upgraded (or should be) before getting Dyno tuned.
94-302-vert said:Ok,
Thanks Grady.. Kinda what I thought and here is why I ask. Bud of mine has an H/C/I (GT40 cast iron, unknown, TFS) & S-trim w/ AODE car. he still has the 19# inj with higher presssure and the stock MAF. He still needs to be dyno tuned. BUT he ran some HP numbers with a g-tech and basically got 260-280ish on the g-tech. So we are trying to figure out what else needs to be upgraded (or should be) before getting Dyno tuned.
94-302-vert said:Can we get away with lightning 42# injectors and a lightening MAF without the tune for now?
94-302-vert said:Ok,
Thanks Grady.. Kinda what I thought and here is why I ask. Bud of mine has an H/C/I (GT40 cast iron, unknown, TFS) & S-trim w/ AODE car. he still has the 19# inj with higher presssure and the stock MAF. He still needs to be dyno tuned. BUT he ran some HP numbers with a g-tech and basically got 260-280ish on the g-tech. So we are trying to figure out what else needs to be upgraded (or should be) before getting Dyno tuned.
THe computer will adjust your fuel duing Closed Loop using the KAMs to bring it back as close as it can, which is fine, but at WOT it will be in OL and you will get the extra fuel that you need. But yeah it will put more strain on the injector thats for sure.CManT1914 said:I'm gonna add one more thing as I don't know if it's been mentioned.
If you raise the fuel pressure to "overdrive" the injectors, assuming the PCM doesn't compensate for this and lower it back down again, you run the risk of wearing out the injectors a lot quicker.
94-302-vert said:Can we get away with lightning 42# injectors and a lightening MAF without the tune for now?
Are you going to be supercharged?94-302-vert said:Thanks Guys,
I do understand how a MAF works but since my car is still basically stock I haven't looked into what it takes to upgrade it.
So does that make our best bet ($$ wise) to get the 42# injectors and an aftermarket 42# MAF? To at least keep the car safe until a tune.