going from 28lb to 30lb injectors worth it??
12-03-2006, 11:32 AM
#1
10 Second Club
Thread Starter
iTrader: (11)
Join Date: Aug 2005
Location: Texarkana,TX
Posts: 954
Likes: 0
Received 0 Likes
on
0 Posts
going from 28lb to 30lb injectors worth it?? How would the duty cycles compare for the two?? I currently have stck 28lb injectors on my car but am thinking I need to upgrade for the nitrous. Would it even be worth it to go to 30s or would I prolly need to go to 42s??
12-03-2006, 11:43 AM
#2
TECH Apprentice
Join Date: Jul 2006
Location: Central IL
Posts: 306
Likes: 0
Received 0 Likes
on
0 Posts
it seems to me if your going to spend the money on new injectors get something that pumps out more than just 2 lbs over stock, i would go with 42s, just because i don't think you'll notice hardly any difference w/ 30.
12-03-2006, 11:43 AM
#3
Launching!
iTrader: (1)
Join Date: Jul 2006
Location: Fairfax, Va
Posts: 275
Likes: 0
Received 0 Likes
on
0 Posts
with a good tune in there, you won't be wasting extra fuel by going with the 42#ers, and in the future if you want to go bigger you'll have the room to grow...
I see no point in wasting time / money by doing a mini stop over.
just my thoughts for what its worth
I see no point in wasting time / money by doing a mini stop over.
just my thoughts for what its worth
12-03-2006, 02:16 PM
#5
Saying "30lb" injectors is like saying "good for up to 10 HP". It really means nothing. You need to know what pressure those 30lb injectors were rated at. I have 30 lb/hr Bosch injectors, but those flowed 30 lb/hr at 43.5 psi. They obviously flow more at 58 psi (our stock rail pressure) - closer to 34-35 lb/hr. The stock injectors in yours are around 28 lb/hr, rated at 58 psi. A heads/cam car with a healthy fuel system could live with the 30 lb/hr injectors (rated at 43.5 psi). Anything more than that, and I would upgrade (probably to the 42 lb-ers).
12-03-2006, 02:57 PM
#6
TECH Fanatic
iTrader: (45)
Join Date: Sep 2006
Location: Clarksville, TN
Posts: 1,122
Likes: 0
Received 0 Likes
on
0 Posts
If your going to replace them and the choices are 30s or 42s go with the 42lbs; just make sure you adjust for the higher flow rate. With stockers in a bolt-ons car I was at about 93% duty cycle until I put in 36lbs now the highest is about 69%
12-03-2006, 05:04 PM
#7
Like others have said, different injectors are rated at different pressure. A 30lb SVO injector(ford) will be higher in our cars due to the pressure our fuel system operates at. Alot of people run those on head/cam setups with good results. With that said I would go ahead and get some 42s. I have the Ractronics and there is no down side going bigger sooner. It allows you room to grow, or for the occasional dry hit like me.
Trending Topics
12-05-2006, 12:58 PM
#8
TECH Enthusiast
iTrader: (9)
Join Date: Aug 2003
Location: T.H. Indiana
Posts: 588
Likes: 0
Received 0 Likes
on
0 Posts
I went from 28#'s to ford 30#'s on my H/C setup. The only reason I didn't go to 42#'s is b/c I will probably never run nitrous. But anyhow my duty cycle on the 28#'s were anywhere from 95%-101%. When I switched them out, the duty cycle went down to 62-68% with the 30#'s.
12-09-2006, 10:09 PM
#10
FormerVendor
iTrader: (9)
Join Date: May 2003
Location: Jacksonville, Fl
Posts: 1,573
Likes: 0
Received 0 Likes
on
0 Posts
Seems like you could answer your own question if you had your own Scanner/Software suite and a Wideband O2. Just remember, bottom line there are no generalities when it comes to a power added and fueling. Not a whole lot of forgiveness. Instead of worrying about injector size I would concentrate on becoming self sufficient/self aware of my setup and not rely on what size of "x" everybody else is using.
12-28-2006, 05:05 AM
#11
On The Tree
iTrader: (8)
Join Date: Nov 2006
Location: Chico, CA
Posts: 154
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by Doc
Seems like you could answer your own question if you had your own Scanner/Software suite and a Wideband O2. Just remember, bottom line there are no generalities when it comes to a power added and fueling. Not a whole lot of forgiveness. Instead of worrying about injector size I would concentrate on becoming self sufficient/self aware of my setup and not rely on what size of "x" everybody else is using.
I am almost finished putting together an LS1 from the ground up and I would consider myself self-sufficient in that aspect. On the other hand I would never attempt to program the car.
My .02 would be ask questions from people you trust, build a bad-*** car and
That said with the knowledge that opinions are like ********. 
P.S. How do you like your Raptor tranny, I was looking to get one.
12-28-2006, 09:09 AM
#12
Originally Posted by kawasakiklx
No offense but some people have busy lives and don't have time to learn what it takes to even attempt to tune a vehicle. There is so much to learn it's almost smarter to leave that to the professionals.
I am almost finished putting together an LS1 from the ground up and I would consider myself self-sufficient in that aspect. On the other hand I would never attempt to program the car.
My .02 would be ask questions from people you trust, build a bad-*** car and That said with the knowledge that opinions are like ********.
P.S. How do you like your Raptor tranny, I was looking to get one.
I am almost finished putting together an LS1 from the ground up and I would consider myself self-sufficient in that aspect. On the other hand I would never attempt to program the car.
My .02 would be ask questions from people you trust, build a bad-*** car and
That said with the knowledge that opinions are like ********. P.S. How do you like your Raptor tranny, I was looking to get one.
