Everywhere I read about nitrous it's always on MAF cars, where you simply put the nozzle before the MAF and the computer adjusts the fuel accordingly, But what about us 93 LT1 owners with speed density?

 

I went with the wet kit for 93. Did you purchase it new for the car? What did they tell you? Or did you buy it used and they said it would work. I dont know if the the density can increase fuel pressure to compinsate for the N2O entry.Good luck.

 

I haven't purchased any kit yet. I just want a small shot so I figured Dry would be easiest and cheapest. But I'm trying to figure out how Speed density compensates for the n02?

Maybe the MAP sensor reconizes it? I don't know, Help?

 

A dry kit works by bumping up fuel pressure at the rail/fuel pressure regulator. All the extra fuel is added through the injectors. So it doesn't matter if it's going on a speed density or maf car, it'll work.

 

LS1's go 'before the MAF'
LT1's go 'after the MAF'

Above is correct its done by bumping fuel pressure..

 

So I'll need an AFPR, but that brings up even more questions...

How much fuel psi is needed for a certain shot?
Computer changes needed since my fuel PSI is changed?
Why are Ls1/LT1 dry shots differently located?


Just a note on the computer changing question above, I heard that with an AFPR the PCM re-calculates the injector BPW for correct fuel, and the AFPR comes into use in WOT... but I forgot why AFPR is usable in WOT..., TIA.

 

Thats the thing, 93s dont have a maf, they are speed density.

 

I knew that!
I was just curious, seeing how I don't have MAF, so I never thought about it.

Anyone?

 

I know you know, but I was replying to that other guys post. Thing with are 93s are they have tables in the computer that adjust, I dont know how they react to gas. They prolly could handle it

 

Oh, well can anyone tell me to correctly setup a dryshot on speed density LT1s?

 

I know that... I was correcting the assumption that ALL dry shots go 'before the MAF' [wrong!]

No, you don't need a AFPR.. [the kit bumps the pressure up thru the stock one..]
There's a line in a dry kit that goes to the FPR and it 'tricks' it into bumping FP and dumping more fuel..

There are no 'tables/reprogramming etc' needed...
And because it's done 'after the MAF' on a 94-7, the MAF[or lack of it?]does nothing, so I really see no basic difference in this principle from 93-4 [and yes I KNOW 93 is speed density]

If I were you I'd try the nitrous forum? [there has to be 93 guys there doing it..]

 

I saw somewhere that the crack goes directly into the throttle body, this other guy had custom AN fitting driectly to the fuel rails. 93's rule