Injector Question
Thread Starter
TECH Regular
Joined: Mar 2002
Posts: 432
Likes: 0
From: Petaluma, CA
Injector Question I'm getting a TR 224/224-112 cam installed & I already have LT's & lid etc. I was talking to a guy who works at a shop & he said something about getting larger injectors. I didn't think larger injectors were needed. Are they?
TECH Senior Member
Joined: Nov 2001
Posts: 7,036
Likes: 1
From: Lake Zurich, IL
Re: Injector Question I think it depends on the year of your car... once it's all installed get it attapped or dynoed w/wideband.
If atap indicated >80% injector utilization you'll wanna upgrade, or if the car is running really lean on the dyno and they can't get it to run any richer.
I believe it's 98, 01 and 02 have 28lb/hr injectors whereas 00 and 99 have 26.5 lb/hr injectors, so the 99-00 are at a somewhat disadvantage on how much power before new injectors are needed.
If atap indicated >80% injector utilization you'll wanna upgrade, or if the car is running really lean on the dyno and they can't get it to run any richer.
I believe it's 98, 01 and 02 have 28lb/hr injectors whereas 00 and 99 have 26.5 lb/hr injectors, so the 99-00 are at a somewhat disadvantage on how much power before new injectors are needed.
TECH Resident
Joined: Jan 2002
Posts: 754
Likes: 0
From: USA
Re: Injector Question
You won't need new injectors with just a cam and bolt-ons. When you approach 450rwhp then you need to start thinking about upgrading.
handle a peak of 416 HP at flywheel and even then that would be at
a 100% duty cycle so at 80% it is only 333 HP and most cars even with
a few mods would exceed that.
Ability of Your Injectors IF 26 lb/min
FWHP 416 Duty Cycle 100% <b>333 @ Duty Cycle of 80%</b>
<b>RWHP 354</b> 283
Using a BSFC of .50
Add some hot weather, some mods and with stock injectors
would be knock city.
Launching!
Joined: Jan 2002
Posts: 201
Likes: 0
From: Sachse, TX
Re: Injector Question [quote
Not a chance, even with a stock engine a 26 lb injector could only
handle a peak of 416 HP at flywheel and even then that would be at
a 100% duty cycle so at 80% it is only 333 HP and most cars even with
a few mods would exceed that.
Ability of Your Injectors IF 26 lb/min
FWHP 416 Duty Cycle 100% <b>333 @ Duty Cycle of 80%</b>
<b>RWHP 354</b> 283
Using a BSFC of .50
Add some hot weather, some mods and with stock injectors
would be knock city.
[/quote]
I agree, but SunsetWS6 has a 2001 with 28# injectors not 26#s.
Not a chance, even with a stock engine a 26 lb injector could only
handle a peak of 416 HP at flywheel and even then that would be at
a 100% duty cycle so at 80% it is only 333 HP and most cars even with
a few mods would exceed that.
Ability of Your Injectors IF 26 lb/min
FWHP 416 Duty Cycle 100% <b>333 @ Duty Cycle of 80%</b>
<b>RWHP 354</b> 283
Using a BSFC of .50
Add some hot weather, some mods and with stock injectors
would be knock city.
[/quote]
I agree, but SunsetWS6 has a 2001 with 28# injectors not 26#s.
TECH Resident
Joined: Jan 2002
Posts: 754
Likes: 0
From: USA
Re: Injector Question [quote I agree, but SunsetWS6 has a 2001 with 28# injectors not 26#s.
[/quote]
28 lbs still would not support 450 HP at rear wheels >
Ability of Your Injectors IF 28 Lb/min
FWHP 448 Duty Cycle 100% 358 at Duty Cycle of 80%
RWHP 381 305
[/quote]
28 lbs still would not support 450 HP at rear wheels >
Ability of Your Injectors IF 28 Lb/min
FWHP 448 Duty Cycle 100% 358 at Duty Cycle of 80%
RWHP 381 305
