safe fuel pressure to run with DSM injectors
#1
Honda-Tech Member
Thread Starter
safe fuel pressure to run with DSM injectors
iv got 450cc DSM injectors. i had them cleaned and rebuilt about 2 years ago. they work great so i didnt want to buy new larger ones. i bought a fpr and was wondering what a safe fuel pressure would be to run? i cant seem to boost more than 5psi because i will go lean. would 60psi be a safe place to start?
#3
Honda-Tech Member
Join Date: Aug 2005
Location: Maplewood, MN
Posts: 1,656
Likes: 0
Received 0 Likes
on
0 Posts
450cc injector are good for about 300 hp. Unless you are make number close to it or over it I see no reason why you will go lean. I also running the 450cc and I have my fuel pressure at stock between 38-40 psi.
#4
Honda-Tech Member
Thread Starter
Re: (turb20_vtec)
i dont think i am making over 300hp. but i do know for sure that my injectors are working at over 100% duty cycle which is why i see the need for my fuel pressure. do you know if i can run 60psi?
btw, i have 50psi fuel pressure at idle beforei hooked up my regulator..how do you have 42psi?
btw, i have 50psi fuel pressure at idle beforei hooked up my regulator..how do you have 42psi?
#6
Honda-Tech Member
Join Date: Aug 2005
Location: Maplewood, MN
Posts: 1,656
Likes: 0
Received 0 Likes
on
0 Posts
I have a walbro 255lph fuel pump so with the stock fuel pressure regulator my fuel pressure is somewhere in the 50s psi. I don't remember exactly. Before I went to tune my car I added my AEM fpr and adjust it back stock fuel pressure. Do you have a aftermarket fuel pump or are you still on the stock fuel pump?
#7
Honda-Tech Member
Thread Starter
Re: (turb20_vtec)
i have the walbro 255. yes my fuel pressure is 50psi as well. i used the regulator to get my about 60psi but i want to know how much pressure is safe to use?
Trending Topics
#9
Honda-Tech Member
Join Date: Aug 2005
Location: I miss the east coast, TX, USA
Posts: 2,695
Likes: 0
Received 1 Like
on
1 Post
Two years ago when I was using dsm injectors in my SI, I ran them at 65psi of rail pressure to keep up until I got some rc 750's. They ran like that for about 10k no problems.
#13
Honda-Tech Member
Join Date: Aug 2002
Location: RIP EARL
Posts: 2,408
Likes: 0
Received 0 Likes
on
0 Posts
Re: (GetawayInMoscow)
You shouldn't be maxing them @ 5psi boost unless you are tuning to 8:1 AFR or something
60psi is fine
BTW what is your setup (motor, turbo, etc) ?
60psi is fine
BTW what is your setup (motor, turbo, etc) ?
#16
Re: safe fuel pressure to run with DSM injectors
60psi should be fine... I don't see how you're maxing them at 5psi though. My lsvtec had 13psi of boost with a gt35r and they never maxed?
Thread
Thread Starter
Forum
Replies
Last Post