Hi guys... Found these on ebay... Will they work on a TPI with a 350 or do I need to go with something else? Here is the link to the auction...

http://cgi.ebay.com/ebaymotors/ws/eB...tem=2404931126

THANK YOU for your advice!!!!!

:hail: :hail: :hail:

 

Should work fine, a bit big for a 305 but look good for a 350 aside from the pink color.

 

agreed... 22's are a bit big for a 305, but if u r going to do a 350 swap soon.. might as well get them now... btw.. have u tried just bumping up ur fuel pressure?? u gain a few ponies that was as well.

 

Someone else had mentioned earlier that I could just get an AFPR and shoot the pressure up a little with my 19's. Would this really be better? Also, since my injectors have about 135,000 miles on them, would I just be better off replacing them anyway or not? HELP! *L* THANKS GUYS!!!!!!!

 

I have one of the tpis insider hints books and they ran some fuel pressure tests on a stock 305 motor. By turning the fuel pressure up to about 49-50 psi they got a 15+ horsepower gain. i would say thats a pretty worthwhile investment

 

Well, I am putting these injectors or AFPR on a 350, so will it still work like you say? What kind of pressure is my stock fuel pump capable of anyway? Oh, and would I be better off replacing them anyway since I have 135,000 miles on them?

 

The injectors should be fine, assuming they're the same physical dimensions as the other Ford injectors in use (the blue-top and yellow-top ones specifically are known to fit TPI rails).

Your stock pressure should be in the 44-48psi range depending on the year of the car. This is in the ballpark range of where you'd want to run these injectors assuming they're flow-rated at the usual 39.x psi of delivery pressure as the yellow-top and blue-top injectors. If true, your higher pressure it will increase the flow rate to 23-24 lb/hour. Assuming they're rated at 39psi, and you're running 45psi, doing the math:

square root(45/39) * 21.9lb/r = (1.074)*(21.9lb/hr) = 23.5 lb/hr

I don't have my notes handy, so if I did the math wrong someone jump in and correct it.

 

Thanks! Sounds like it is going to be these Bosch injectors and a Holley AFPR that you mentioned in the other thread. What if I just go with these injectors and no AFPR? Would it be well worth the cost of the AFPR to just do it anyway? Appreciate the help as this is my first motor project....

 

Depends on how much pressure your current regulator can yield. I personally like 45psi minimum, but opinions vary. I ripped my best 1/4mi time (13.19sec @ 102mph) at 48psi.

The AFPR will likely let you get away without getting into PROM tuning, given the new injectors are really close to the 22# factory 350 injectors, if you can find a 350 MEMCAL and PROM.