Put my FAST 102 on and injectors don't fit tight.
10-05-2012, 03:31 AM
#1
Put my FAST 102 on and injectors don't fit tight. I was putting my Fast intake on and I have 60lb deka injectors and when I put them in they are loose in the intake. I have read somewhere that you need a bigger o-ring on the bottom of the injector. If that's so can somebody tell where you bought to fatter o-ring? I got the injectors and my fuel rails from nasty performance.
10-05-2012, 09:07 AM
#2
Be careful here. I discussed this via email with the FAST guys last week and told them it is an issue using this injector.
You do have to use the conversion o-ring that FAST will sell you, although it does fit a little loose on the thinner style injectors. The big problem is that the Siemens Deka 60 (Mototron) does not have the plastic o-ring retainer at the bottom like the Bosch style injectors do. This means the 60# injector sits down into the injector pocket lower on these intakes. We have a major fuel leak on the engine dyno, so make sure you pressure check things thoroughly before you get it hot.
We were using the FAST fuel rails, so we had to shorten the brackets that hold the rails to the intake to get a good seal. If you have the stock style rails you may be bale to secure them better because of the clips that hold the injector in the rail. That is where our leaked, at the top of the injector because the injector would fall down in to the intake too far, even with the FAST o-rings.
You do have to use the conversion o-ring that FAST will sell you, although it does fit a little loose on the thinner style injectors. The big problem is that the Siemens Deka 60 (Mototron) does not have the plastic o-ring retainer at the bottom like the Bosch style injectors do. This means the 60# injector sits down into the injector pocket lower on these intakes. We have a major fuel leak on the engine dyno, so make sure you pressure check things thoroughly before you get it hot.
We were using the FAST fuel rails, so we had to shorten the brackets that hold the rails to the intake to get a good seal. If you have the stock style rails you may be bale to secure them better because of the clips that hold the injector in the rail. That is where our leaked, at the top of the injector because the injector would fall down in to the intake too far, even with the FAST o-rings.
10-05-2012, 10:02 AM
#3
I have the nasty rails and they fit in there tight so I don't see where it would leak on that end. I'm more worried about the intake end of the injector. It fits too loose in there. I bought the intake used from a member here and it also has a metal insert in the injector hole that I took out to get the dekas to fit. I guess those are spacers for the short style injectors. i guess i will have to return the injectors and get some different ones if I can't to get these to fit snug
10-05-2012, 12:51 PM
#6
I hope those aren't the same ones that come on the metal spacer for the short injector. I tried them on my injectors and they were loose on the base of the injector. Maybe they were stretched out more because the base of the adapter is bigger than the base of an injector?
I'll order them anyway since they are only a couple of bucks.
I'll order them anyway since they are only a couple of bucks.
