people with upgrade inject
Thread Starter
TECH Resident
Joined: Jul 2003
Posts: 858
Likes: 0
From: Everywhere
people with upgrade inject guys i just a set of SVO 30 bound inject,,(red top)
i got them used and the rings is missing(is that what they call it)
the O ring in the inject is missing( the piece of rubber in the end of the inject) can i use it from my old inectour
thanx
i got them used and the rings is missing(is that what they call it)
the O ring in the inject is missing( the piece of rubber in the end of the inject) can i use it from my old inectour
thanx
TECH Addict
Joined: Sep 2003
Posts: 2,065
Likes: 0
From: Atlanta, GA
don't re-use them man. Get some new o-rings for christ sake. An engine fire sucks.
I think they are like $15-20 max for a set of new ones. thats if you dont have hookups at any parts counter (IE 5 finger).
then again i am used to boosted motors (similar to you nitrous heads) where you can pop an injector right out with manifold pressure and really make a mess (AKA FIRE).
Also, with used injectors, its good to find a friend that works at a shop, he can clean them takes 10 minutes tops, and then roughly flow them to make sure one isn't FUD.
Goes back to buying new injectors. One fud injector = one fud piston. Save a buck spend a few thousand eh?
I've had good success buying the lime green/orange tops from stang shops. Those cars dont have alot of miles on them. Paying about $200 for 8 440cc.
A great way to use huge injectors with less problems is to lower fuel pressure. The bosch fpr you use is used on alot of german cars. So dropping back to 3bar and running big injectors helps the low end issues (low load drivability/cold start) while providing you with an injector that doesn't require you go go over 85%. Once you hit 85% on a regular (red top generation) they go static, and you're playing with guns there.
During the transition from normal to static, the injectors will float for a short time in a half open state. This might be just one pulse, but it can result in erratic fueling.
Ideally you want to stay under static. It's very apparent for each STYLE of injector, the lucas/deka one's are a little better behaved than the heavy pintle old style bosch but still go static. You'll see when you hit static the air fuel will go ballistic rich uncontrollable. At that point you gotta back off pulsewidth, or increase timing or move more air
I noticed my 00 z28 injectors are running static well before 5500rpm on my setup (see sig for dyno). They are obviously way too small. hitting 102% (????) at 6189 rpm is kinda odd. Didn't think injectors could do that. I guess that means the pulsewidth is longer than the revolution. Not exactly what i like to see in a high performance motor.
I think they are like $15-20 max for a set of new ones. thats if you dont have hookups at any parts counter (IE 5 finger).
then again i am used to boosted motors (similar to you nitrous heads) where you can pop an injector right out with manifold pressure and really make a mess (AKA FIRE).
Also, with used injectors, its good to find a friend that works at a shop, he can clean them takes 10 minutes tops, and then roughly flow them to make sure one isn't FUD.
Goes back to buying new injectors. One fud injector = one fud piston. Save a buck spend a few thousand eh?
I've had good success buying the lime green/orange tops from stang shops. Those cars dont have alot of miles on them. Paying about $200 for 8 440cc.
A great way to use huge injectors with less problems is to lower fuel pressure. The bosch fpr you use is used on alot of german cars. So dropping back to 3bar and running big injectors helps the low end issues (low load drivability/cold start) while providing you with an injector that doesn't require you go go over 85%. Once you hit 85% on a regular (red top generation) they go static, and you're playing with guns there.
During the transition from normal to static, the injectors will float for a short time in a half open state. This might be just one pulse, but it can result in erratic fueling.
Ideally you want to stay under static. It's very apparent for each STYLE of injector, the lucas/deka one's are a little better behaved than the heavy pintle old style bosch but still go static. You'll see when you hit static the air fuel will go ballistic rich uncontrollable. At that point you gotta back off pulsewidth, or increase timing or move more air
I noticed my 00 z28 injectors are running static well before 5500rpm on my setup (see sig for dyno). They are obviously way too small. hitting 102% (????) at 6189 rpm is kinda odd. Didn't think injectors could do that. I guess that means the pulsewidth is longer than the revolution. Not exactly what i like to see in a high performance motor.
