How many horses will 26 pound injectors hold? will it hold a well built 355 with nitrous? thanx for the advise in advance.

 

Wet or dry nitrous? "Wet" doesn't use the injectors. "Dry" does.

For N/A, wet, my personal recommendation would be to take the 26's no further than 400flywheel. But there are numerous people here who will tell you they are making 450rwHP on 24's at stock fuel pressure..... so its subject to debate.

 

i was actually gonna run a dry system. the only reason i wanna go with 26lbs is there is a guy locally that has a set and wants to swap me for my 24lbs. I got all thats in my sig plus headers and the nitrous to come and my 355 with all light weight stuff. so ill prolly be round the 400-450 flywheel mark safly with the nitrous. maby i should try the n2o fourum.

 

You dont say what size 'shot' you will be using...

I dont see why youd only be at 400-450fwhp with ported heads and a hotcam w/ boltons and n20. I think your are underestimating things.

Anywho, use this page-
http://www.rceng.com/technical.htm
Use around a .50 BSFC and try to stay at 80% duty cycle, that the best i can recommend.

Personally i see no way of running your setup with those injectors...

 

Well my plan is a 150 on about 10.8:1 compression. the HP was a conservative guess. thanx for the reponses.

 

I could be wrong but if i did the math correctly i came up with a 36 lb injector for 450 hp?? That doesnt seem right, but i dont kno much about the injector subject. Did i do the addition incorrectly or or is 36 right?

 

That is about right, 36lbs injs would be around 80% duty cycle with 450fwhp at a .50bsfc.

 

What kind of injector are the 26s....what app are they out of?

 

I have no idea, the deal has only been kinda jus been touched on never got deep into the specs.

Is there a scanner or program that you can hook up to a vehicle to tell what the cycle duty is? Also is the web page listed above for use in fwhp or rwhp?

 

I went ahead and went with 30 pound SVO's in my car... Better be safe than sorry.

 

Didn't GM call the injectors in LS1's 26lb but they are the same stock number just running higher pressure than LT1? Just FYI.

 

LTx and LSx injectors aren't the same.. LS1's run at a higher FP than us...

 

1. Yes there are a few, i personally use TTS Datamaster.

2. Fwhp

 

The online injector sizing programs are very "general" - they use 0.50#/HR/HP BSFC, and assume 80% duty cycle. A very well tuned competition motor might see a brake specific fuel consumption as low as 0.42#/HR/HP. A power adder motor - blower or nitrous - will produce a BSCF in the range of 0.52-0.55#/HR/HP. I saw 0.42 on my motor running NA, and 0.52 with dry nitrous.

There are people here who quote HP numbers and stock injector sizes that indicate they routinely operate their injectors at 100%DC. Defies logic, but every time I recommend a more conservative approach, they all tell me I'm wrong . But my preference is to keep the DC at 80% or below. I run 70%DC at a shade under 800flywheelHP on dry nitrous. 64# Bosch injectors running at 58psi.

I believe that Racetronix has sold the LS1 injectors with the advice that although they are operated at 4bar (58psi), they are still flow rated at 3bar (43.5psi). You would need to verify that, but I assume Racetronix would know.

 

I bought some 28# ls1 injectors and tried them in my lt1.....Datamaster showed the engine to be lean and was adding fuel across the board.....I had to lower the fuel constant to 24# to get the BLMs close to 128.....so I would say the 28# ls1 injectors are indeed rated at 4bar.