going from 28lb to 30lb injectors worth it??
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??
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Joined: Jul 2006
Posts: 306
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From: Central IL
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.
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
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).
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%
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.
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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.
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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.
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.
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.
