Fuel Injector size too big?

roldy

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Jul 22, 2020
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Missouri
I recently purchased 80 lb injectors for my 351W NA. I plan on getting a programmable ECU. The engine is rated at 575 HP. I'm second guessing myself now. Should I have bought smaller injectors, something around 60 lbs? This is not a daily driver, just a cruiser and sometimes strip car. The reason why I went with 80 lbs was because I'm planning for the future when I install a twin turbo setup.
 
N/A 351W with a hydraulic cam could probably run on 36 lb injectors. :shrug: Maybe even 24. O_o

With the right driver and EEC, it doesn't really matter though. You can tune fine with those. You'll just have more room to grow. Boost is next. :D

I dunno what "rated for" means. My block and rotating assembly are "rated for" 1100 HP. It'll never see that though. :nonono:
 
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N/A 351W with a hydraulic cam could probably run on 36 lb injectors. :shrug: Maybe even 24. :O_o:

With the right driver and EEC, it doesn't really matter though. You can tune fine with those. You'll just have more room to grow. Boost is next. :D

I dunno what "rated for" means. My block and rotating assembly are "rated for" 1100 HP. It'll never see that though. "
"Rated" was the wrong terminology. 575 HP is the advertised HP that the crate produces as is. I bought it from Ford Racing. A follow up question that I have is what would a reputable brand be for an EEC?
 
"Rated" was the wrong terminology. 575 HP is the advertised HP that the crate produces as is. I bought it from Ford Racing. A follow up question that I have is what would a reputable brand be for an EEC?
I will refer you to the expert in such things: @a91what can better tell you how to do it efficiently so you don't have to spend money twice.

He'll get a "ping" when he logs on next.
 
I often run 80lb injectors in 302 based engines. Much larger 210 injectors on e85 cars and even turbo 4cyl..

I personally run Ford Racing LU80 on my twin turbo 393w. You will be fine.
As for the ecu it's really up to you options out there are huge. I have helped guys make 1000+ with a $350 micro squirt. What kind of budget do you have?
 
I think you should have clarified that you purchased a 351 "based" engine, i took a quick look at ford racing's site, what you really purchased appears to be a 460 with Z heads.
Quite a bit more engine than your average 351.
 
I often run 80lb injectors in 302 based engines. Much larger 210 injectors on e85 cars and even turbo 4cyl..

I personally run Ford Racing LU80 on my twin turbo 393w. You will be fine.
As for the ecu it's really up to you options out there are huge. I have helped guys make 1000+ with a $350 micro squirt. What kind of budget do you have?
I don't know too much about ECU's or what would be a good price for a reliable ECU. I would say $500 max.
 
I'm running Ford 30lb 4 hole injectors in my slightly stock 302 F150. Only big engine mod is a small cam giving me 10% more torque and I switched to MAF. The computer will only send what the engine is calling for.
 
Easiest to tune is very subjective. What I think is easy you may find difficult ect.
The Holley is the most adjustable system you can get and not to mention can be done remotely. You pay for $5-600 for a quarter horse or squirter and you still have all your 30 year old ecm and wires running through out the engine bay. For $1000 you get a plug and play system that will never need to be replaced again.