LS1C5Vette

iTrader: (11)

I already have the mods in my sig but will be adding a set of TSP stg 2.5 5.3l heads and a Ported fast 92 w/ LS2 TB. Will 30lb inj's be ok or will/should I go bigger? Thanks

Z28/2002

iTrader: (27)

I had 42s with the same heads, MS3 and FAST 90/90 and they were only at like 58% duty cycle @ WOT

LS1C5Vette

iTrader: (11)

So whats below the 42's? 30's?? I prob would not have to go that big if your were at 58%. BTW tell the chick in your avaitar I said hi

CBIII

iTrader: (6)

rule of thumb seems to be not to really exceed 80% but there are 36#s.

cabech984

iTrader: (11)

42# injectors would suit you plenty. May as well buy them incase you wanna upgrade something later!!

JScamaro

iTrader: (6)

Fast sells 36 lb. injectors and you can get them for $330. I believe they will act like 40 lb. injectors with the LS1 fuel pressure.

theblur98ss

iTrader: (71)

I'd say 30's would be pushing it. 36's should be a safe bet. 42's if you plan on major future upgrades.

Evans752

iTrader: (29)

I think 30's will be fine. 42 will work but you are going to have t tune for either. Ive seen several LS style motors with Ford SVO 30 put down right at 500 HP to the groung and be good to go.

SweeTbone

iTrader: (8)

I have SVO 30s and I'm about 81% duty cycle and I put down 445 RWHP a Y-pipe set up. 30s are fine for N/A. But you should go bigger if you EVER think you'll take the nitrous route later. Better off going bigger now than having to replace the 30s later down the road. I thought I would NEVER hit the nitrous, but now I'm on the fence. If you're SURE you won't get 30s, if you're not sure, go 42s IMO.

GGTTOO

iTrader: (2)

Try this: http://www.injector.com/injectorselection.php

I think 42# are good up to 500 RWHP on LS1.

RoDan

I'd go 42#ers, they are good for more than 500 at the wheels for sure.

LS1C5Vette

iTrader: (11)

I will be right at 450 rwhp on a dynojet just so you guys know........

SIC LSX

iTrader: (10)

I have SVO 42's and they are great! SVO 30lbs will do they are 36lbs with our fuel pressure but i got 42's and im cam only, so i never really had to buy anymore down the road when i add more mods

just installed TSP (PRC)stg 2.5 5.3 heads with MS3 cam with lucas 42lbs and worked out great!

LS1C5Vette

iTrader: (11)

Are the SVO 30's a direct drop in? Will having 42lb injectors cause me to have shitty MPG over the SVO's, or do you just tune them to run the correct amount of fuel therefore thet are the same?

SweeTbone

iTrader: (8)

Yep, SVO 30s are a direct drop in. 42s won't have any negative effects towards gas mileage, only your right foot will. You WILL have to tune either one though. Do NOT run you car on the stock tune with either one of these injectors.

LS1C5Vette

iTrader: (11)

Awsome, I will get the 42's then just incase i do something down the road, do you know where to get a set for a decent price?

LS1C5Vette

iTrader: (11)

Bump, need to know who sells them for a good price?

GGTTOO

iTrader: (2)

Just check with the sponsors to the right. They will get you a good price. Also keep your ear to the for sale section as these always come up for sale.

LS1C5Vette

iTrader: (11)

Found some 38lb injectors for $200 so I am going to go with those, I think those will work great, thanks for all the help guys

Soul TKR

iTrader: (4)

I'm also looking at probably getting some 42#ers

anyone have a direct link, so I can read up on em a little more...