Double mod'ing again?
Double mod'ing again? I just had my engine forged/built with AFR H/C package ... bunch of other stuff. My concern is the fuel system upgrade. A year ago, I upgraded from 26# stock injectors to 28# stockers. Now, I have just upgraded again to SVO 30# injectors with a new Racetronics fuel pump ... all this in preparation to spray a 200 hit. Now, I'm being told by some the ijectors or fule pump may not allow me to go with that big a spray. 
Do you agree?
Do you agree?
Depends on your current injector duty cycle when running NA. If you are close to using all your injector's capacity, then you don't have the extra headroom to run a 200 shot, which needs quite a bit of fuel.
The pump is probably OK, if it's getting 13+ volts at the pump. What lines are your running, stock?
I would have gone straight to the 42's if I were planning to spray that large.
Jim
The pump is probably OK, if it's getting 13+ volts at the pump. What lines are your running, stock?
I would have gone straight to the 42's if I were planning to spray that large.
Jim
Well, back about 2 years ago (when I was at 335 RWHP/349 RWTQ), the 26# stockers were over-maxed at about 90% duty cycle. I upgraded to 28.8 and they seemed to be about right for my recent 360 RWHP/370 RWTQ setup.
Now, the 30# SVO's, if they were a true 30#'s, probably would be about right for me now ... numbers after all this motor work are about 400/400. Don't know exact dyno numbers yet. However, 30# SVO's are supposed to flow at 36#'s, so, I probably ought to just limit my car to 150 hit right now.
I guess since I have never driven a car on spray, I should keep it to a less-than-200-shot, anyway. Damn! I hate this paying for **** twice stuff. I don't think my engine builder knew I would be wanting to go for a 200-250 setup. I know him and he absolutely would have installed at least 42#'ers. Oh well, it's probably best to keep it at 150 for now. Just trying to do it right so I don't keep having to do **** over again.
Maybe I should just go ahead and do a DP 150 and I can upgrade that pretty easily later to a 200-250. 250 is my goal. Nitrous Dave brought up a good point. Why go with anythinhg other than a DP setup for now ... IF that's my final goal. Why spend the money for a dry kit ... knowing I'd have to spend more money later. I think I'll take his advice and just wait on the nitrous until I can do a DP 200-250. At that point, I guess changing injectors would be considered a minimal expense.
My fuel lines are stock ... what would be the advantage to going larger and what would the cost be? You've brought up a VERY good point, I think.
Now, the 30# SVO's, if they were a true 30#'s, probably would be about right for me now ... numbers after all this motor work are about 400/400. Don't know exact dyno numbers yet. However, 30# SVO's are supposed to flow at 36#'s, so, I probably ought to just limit my car to 150 hit right now.
I guess since I have never driven a car on spray, I should keep it to a less-than-200-shot, anyway. Damn! I hate this paying for **** twice stuff. I don't think my engine builder knew I would be wanting to go for a 200-250 setup. I know him and he absolutely would have installed at least 42#'ers. Oh well, it's probably best to keep it at 150 for now. Just trying to do it right so I don't keep having to do **** over again.
Maybe I should just go ahead and do a DP 150 and I can upgrade that pretty easily later to a 200-250. 250 is my goal. Nitrous Dave brought up a good point. Why go with anythinhg other than a DP setup for now ... IF that's my final goal. Why spend the money for a dry kit ... knowing I'd have to spend more money later. I think I'll take his advice and just wait on the nitrous until I can do a DP 200-250. At that point, I guess changing injectors would be considered a minimal expense.
My fuel lines are stock ... what would be the advantage to going larger and what would the cost be? You've brought up a VERY good point, I think.
Oh ... Are you talking about a direct port setup only? It seems like any nitrous setup would still require a lot more fuel ... putting an extra load on the injectors ... shows you how much I don't know about it.
I'll go back and re-read the stickies on the subject ... seems like I forget most of what I read ...
I'll go back and re-read the stickies on the subject ... seems like I forget most of what I read ...
Racetronix FP was installed when the engine was forged and built last month. I had my performance shop to do it and the SVO injectors, as well ... in preparation of a nitrous setup. A couple of folks here have stated that the Racetronix won't support a 200-250 hit, nor will the 30# SVO injectors, though. I thought it would, so, if not, here I go re-mod'ing again in the near future. Guess it will be 42# injectors and a Walbro 340 ... wish I'd known.
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Doin' it over, I guess. Racetronix FP was installed when the engine was forged and built last month. I had my performance shop to do it and the SVO injectors, as well ... in preparation of a nitrous setup. A couple of folks here have stated that the Racetronix won't support a 200-250 hit, nor will the 30# SVO injectors, though. I thought it would, so, if not, here I go re-mod'ing again in the near future. Guess it will be 42# injectors and a Walbro 340 ... wish I'd known. 
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The Racetronix kit will support around 600 RWHP out of the box. Add in a fuel rail mounted fuel pressure regulator and you'll be good to 650+ RWHP. Need more? Add in a BAP. If doing a wet shot you're injectors will be fine (as long as they are enough for the motor). If doing a dry shot, time to upgrade the injectors. 
Matt
Matt
