The limits of stock springs & injectors???
11-07-2007, 07:40 PM
#1
The limits of stock springs & injectors??? After doing a few mods I was curious as to what point do you need to change out some of your stock parts. Mainly your injectors & springs?
I have a stock 04 GTO drivetrain w/ 19000 miles on it & I plan on adding custom CAI, a SLP 85mm MAF, FAST 90 TB, FAST Intake, porting my LS1 241 heads, adding a 225/229 .585 .590 114* cam, headers, removing the cats, & a reprogram. If I add these items will I need to get better / higher rate injectors or will the stock ones be enough to feed the motor? What about springs? Will they work with that much lift? Should I just change them anyway?
Please LMK what you think
I have a stock 04 GTO drivetrain w/ 19000 miles on it & I plan on adding custom CAI, a SLP 85mm MAF, FAST 90 TB, FAST Intake, porting my LS1 241 heads, adding a 225/229 .585 .590 114* cam, headers, removing the cats, & a reprogram. If I add these items will I need to get better / higher rate injectors or will the stock ones be enough to feed the motor? What about springs? Will they work with that much lift? Should I just change them anyway?
Please LMK what you think
11-07-2007, 07:52 PM
#2
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Limits of the stock valve springs = stock cam. Anything aftermarket you will definitely want to change the springs.
Stock injectors are typically good to 400-420 rwhp. You might be ok with your stock ones based on the mods you listed. Only datalogging the injector duty cycle after the mods are in will tell you for sure. If you find peak IDC exceeding 80%, then an upgrade to 30# SVO's would be a good choice.
And FYI, skip the MAF replacement, pure waste of money.
Stock injectors are typically good to 400-420 rwhp. You might be ok with your stock ones based on the mods you listed. Only datalogging the injector duty cycle after the mods are in will tell you for sure. If you find peak IDC exceeding 80%, then an upgrade to 30# SVO's would be a good choice.
And FYI, skip the MAF replacement, pure waste of money.
11-08-2007, 06:52 AM
#5
save yourself the headache, don't go with speed density.
it used to be the next cool thing to do but the truth is that unless your exceeding your MAF tables (which you really shouldnt be until around 500+ hp) a speed density tune does nothing for you...except give you headaches. a lot of people report that it runs much more like a carbed car, especailly in cold weather. just don't touch the MAF...you'll thank yourself later
it used to be the next cool thing to do but the truth is that unless your exceeding your MAF tables (which you really shouldnt be until around 500+ hp) a speed density tune does nothing for you...except give you headaches. a lot of people report that it runs much more like a carbed car, especailly in cold weather. just don't touch the MAF...you'll thank yourself later
