Stock Injectors
Stock Injectors Can anybody tell me at what point I need to upgrade from the stock injectors? My car will have an LS6, full exhaust, FAST intake, under drive pulley and Comp Cams 228/228 .588 .588 112 + 2 degrees when it is done. Will the stock injectors be able to support that, or should I upgrade? If I should get bigger ones, how big? Thanks for any help.
For your mods, I would suggest getting at least 35lb injectors (rated at GM spec 58psi). A good replacement is the Ford SVO 30lb (rated at 43.5psi) red top injectors. 
But, do you plan on doing more mods? What is the power goal? That will dictate if you need to step up to 40-45lbers.
But, do you plan on doing more mods? What is the power goal? That will dictate if you need to step up to 40-45lbers. I asked my tuner what size to get. You need to change your tune when you install different injectors so the best time to swap them in is when you get the cam tuned. For the mods you list you can probably go with the ones I have - Ford racing 30# red tops (which flow 36# in our cars because the fuel pressure is higher).
edit: I guess I restated what 12secSS said... we submitted at about the same time. sorry.
edit: I guess I restated what 12secSS said... we submitted at about the same time. sorry.
I knew that I was leaving a few things out.
98 Z/28. Stock LS6 heads. Fast 92 intake. No further mods planned.
I realize that I will need a tune and I will have Speed Inc. take care of that after the engine is installed.
98 Z/28. Stock LS6 heads. Fast 92 intake. No further mods planned.
I realize that I will need a tune and I will have Speed Inc. take care of that after the engine is installed.
Your probably okay with the stock injectors, I believe they are 28# for your current application. The 30# Red Top SVO's would be a nice bump up and give you a little more to work with. If down the road you decide to make more changes, you may consider the 42# SVO's. Good luck with it all.
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For your mods, I would suggest getting at least 35lb injectors (rated at GM spec 58psi). A good replacement is the Ford SVO 30lb (rated at 43.5psi) red top injectors. But, do you plan on doing more mods? What is the power goal? That will dictate if you need to step up to 40-45lbers.
But, do you plan on doing more mods? What is the power goal? That will dictate if you need to step up to 40-45lbers.
I had the same question as the thread starter- almost same mods- fast 78 Livernois CNC heads TR224/224/112 cam looks like wile im assembling this, I shoud do these SVO inj too - are the a "bolt in"? same size,connector? Im shooting for 400-425 RWHP through a M6 and a 8.5" rear
You would be ok with cam only and 42 lbers, especially if you plan to use nitrous in the future.