80lb injectors 114%, fuel system upgrade options
#1
10 Second Club
Thread Starter
iTrader: (37)
Join Date: Jan 2004
Posts: 1,935
Likes: 0
Received 0 Likes
on
0 Posts
80lb injectors 114%, fuel system upgrade options
First off, I'm trying to keep cost down or I would just go to a Big Stuff computer.
Right now I have dual inline 255 walbros with I believe -8s to a Y into the stock feed line. Feed goes to my drivers side rail, then to the passanger rail. Then I have an aeromtive presure regulater at the end of the rail and then back to the stock vent line as a return. I have 80lb injectors maxed at 114% at only 800rwhp. These injectors should be good for more than that I thought. I'm running 112 octane.
Is it possible my stock feed is holding them back? Could my fuel system be enough if I just upgrade the feed line(what size?) and then use the stock feed as the return?
Another topic, but is meth a good option rather than upgrading the fuel system?
Right now I have dual inline 255 walbros with I believe -8s to a Y into the stock feed line. Feed goes to my drivers side rail, then to the passanger rail. Then I have an aeromtive presure regulater at the end of the rail and then back to the stock vent line as a return. I have 80lb injectors maxed at 114% at only 800rwhp. These injectors should be good for more than that I thought. I'm running 112 octane.
Is it possible my stock feed is holding them back? Could my fuel system be enough if I just upgrade the feed line(what size?) and then use the stock feed as the return?
Another topic, but is meth a good option rather than upgrading the fuel system?
#4
I found on mine a large,twin nozzle progressive meth system took nearly 15% off my duty cycle at WOT. Course,if it runs out,its gonna be a pretty pile of scrap metal ! And since it only sprays under boost,I kept my part throttle drivability and idle characteristics that the smaller inj gave me.Install the Meth,retune,and verify WOT FP,then see what your DC is.
#7
10 Second Club
Thread Starter
iTrader: (37)
Join Date: Jan 2004
Posts: 1,935
Likes: 0
Received 0 Likes
on
0 Posts
Here's a pick of the regulator:
The feed goes to the passenger rail and then over in the back to the drivers rail, then hits the regulator and then down to the return.
Trending Topics
#8
Coal Mining Director
iTrader: (17)
Join Date: Nov 2001
Location: Virginia
Posts: 4,442
Likes: 0
Received 0 Likes
on
0 Posts
Save yourself a lot of money and grief and do it the right way first...even if it means running less hp for a while.
Is the regulator plumbed as a rising rate 1:1? Can't tell from the picture. If your base is 58psi, then it should hit 68psi at 10lbs of boost,etc,etc.
If it is plumbed that way and if the fuel pressure is rising 1:1 with boost, it's time to turn the boost down and live with the existing injectors......or buy bigger injectors...anything else is asking for trouble.
Talk to your tuner and make sure of the above.
Killer looking set-up BTW.
Is the regulator plumbed as a rising rate 1:1? Can't tell from the picture. If your base is 58psi, then it should hit 68psi at 10lbs of boost,etc,etc.
If it is plumbed that way and if the fuel pressure is rising 1:1 with boost, it's time to turn the boost down and live with the existing injectors......or buy bigger injectors...anything else is asking for trouble.
Talk to your tuner and make sure of the above.
Killer looking set-up BTW.
#9
TECH Senior Member
iTrader: (59)
verify that you are adding fp with boost
if you are then get the injectors checked or swap with somebody..60's could do better than your 80s are looking
you got a **** ton of money tied up in everything else, spend another 100 bux to get the -8 line up to the front (yes know everybody and there mom uses stock lines these days and makes 1200rwhp i dont care)
while you are in the tank make sure your walbro set up, however that is.. does not have a kink in the hose, a leak, split etc. also make sure the pick up is not too close to the bottom of the tank and starving the pump.
last thing how are the pumps wired? is your alternator healthy?
i have dedicated relays and dedicated grounds directly to my pumps to make sure they get plenty of good juice.
if you are then get the injectors checked or swap with somebody..60's could do better than your 80s are looking
you got a **** ton of money tied up in everything else, spend another 100 bux to get the -8 line up to the front (yes know everybody and there mom uses stock lines these days and makes 1200rwhp i dont care)
while you are in the tank make sure your walbro set up, however that is.. does not have a kink in the hose, a leak, split etc. also make sure the pick up is not too close to the bottom of the tank and starving the pump.
last thing how are the pumps wired? is your alternator healthy?
i have dedicated relays and dedicated grounds directly to my pumps to make sure they get plenty of good juice.
#10
10 Second Club
Thread Starter
iTrader: (37)
Join Date: Jan 2004
Posts: 1,935
Likes: 0
Received 0 Likes
on
0 Posts
Save yourself a lot of money and grief and do it the right way first...even if it means running less hp for a while.
Is the regulator plumbed as a rising rate 1:1? Can't tell from the picture. If your base is 58psi, then it should hit 68psi at 10lbs of boost,etc,etc.
If it is plumbed that way and if the fuel pressure is rising 1:1 with boost, it's time to turn the boost down and live with the existing injectors......or buy bigger injectors...anything else is asking for trouble.
Talk to your tuner and make sure of the above.
Killer looking set-up BTW.
Is the regulator plumbed as a rising rate 1:1? Can't tell from the picture. If your base is 58psi, then it should hit 68psi at 10lbs of boost,etc,etc.
If it is plumbed that way and if the fuel pressure is rising 1:1 with boost, it's time to turn the boost down and live with the existing injectors......or buy bigger injectors...anything else is asking for trouble.
Talk to your tuner and make sure of the above.
Killer looking set-up BTW.
I do realy need to talk to my tuner to see what my best option is but he told my less boost too
verify that you are adding fp with boost
if you are then get the injectors checked or swap with somebody..60's could do better than your 80s are looking
you got a **** ton of money tied up in everything else, spend another 100 bux to get the -8 line up to the front (yes know everybody and there mom uses stock lines these days and makes 1200rwhp i dont care)
while you are in the tank make sure your walbro set up, however that is.. does not have a kink in the hose, a leak, split etc. also make sure the pick up is not too close to the bottom of the tank and starving the pump.
last thing how are the pumps wired? is your alternator healthy?
i have dedicated relays and dedicated grounds directly to my pumps to make sure they get plenty of good juice.
if you are then get the injectors checked or swap with somebody..60's could do better than your 80s are looking
you got a **** ton of money tied up in everything else, spend another 100 bux to get the -8 line up to the front (yes know everybody and there mom uses stock lines these days and makes 1200rwhp i dont care)
while you are in the tank make sure your walbro set up, however that is.. does not have a kink in the hose, a leak, split etc. also make sure the pick up is not too close to the bottom of the tank and starving the pump.
last thing how are the pumps wired? is your alternator healthy?
i have dedicated relays and dedicated grounds directly to my pumps to make sure they get plenty of good juice.
#11
FormerVendor
Save yourself a lot of money and grief and do it the right way first...even if it means running less hp for a while.
Is the regulator plumbed as a rising rate 1:1? Can't tell from the picture. If your base is 58psi, then it should hit 68psi at 10lbs of boost,etc,etc.
If it is plumbed that way and if the fuel pressure is rising 1:1 with boost, it's time to turn the boost down and live with the existing injectors......or buy bigger injectors...anything else is asking for trouble.
Talk to your tuner and make sure of the above.
Killer looking set-up BTW.
Is the regulator plumbed as a rising rate 1:1? Can't tell from the picture. If your base is 58psi, then it should hit 68psi at 10lbs of boost,etc,etc.
If it is plumbed that way and if the fuel pressure is rising 1:1 with boost, it's time to turn the boost down and live with the existing injectors......or buy bigger injectors...anything else is asking for trouble.
Talk to your tuner and make sure of the above.
Killer looking set-up BTW.
Agree with all of the above.
Right now it is at 72psi base pressure, boost referenced regulator, 26+psi boost.
My suggestion was to pulley it down, especially considering the production heads.
Elbow/filter will not signifigantly reduce boost unless it's horribly inefficient/undersized.
#12
Coal Mining Director
iTrader: (17)
Join Date: Nov 2001
Location: Virginia
Posts: 4,442
Likes: 0
Received 0 Likes
on
0 Posts
Right now it is at 72psi base pressure, boost referenced regulator, 26+psi boost.
My suggestion was to pulley it down, especially considering the production heads.
Elbow/filter will not signifigantly reduce boost unless it's horribly inefficient/undersized.
Ding,ding,ding....we have a winner.
If Jim is your tuner, you have the best. He'll guide/tune you to super power safely.
Forget the filter....Pulley it down, add the Chance and then let Jim tune it. The 800rwhp means nothing really if your old converter flashed to 6300. It's possible that you could make +800rwhp with a good converter and lower boost with your existing fuel system.
My suggestion was to pulley it down, especially considering the production heads.
Elbow/filter will not signifigantly reduce boost unless it's horribly inefficient/undersized.
Ding,ding,ding....we have a winner.
If Jim is your tuner, you have the best. He'll guide/tune you to super power safely.
Forget the filter....Pulley it down, add the Chance and then let Jim tune it. The 800rwhp means nothing really if your old converter flashed to 6300. It's possible that you could make +800rwhp with a good converter and lower boost with your existing fuel system.
#17
10 Second Club
Thread Starter
iTrader: (37)
Join Date: Jan 2004
Posts: 1,935
Likes: 0
Received 0 Likes
on
0 Posts
The kind that saves your brand new engine until you can put on some nice strong 6-bolt heads instead of stock heads Once everything is built to handle the higher boost, then it's not hard to swap the pulley back on and up the boost.
#20
10 Second Club
Thread Starter
iTrader: (37)
Join Date: Jan 2004
Posts: 1,935
Likes: 0
Received 0 Likes
on
0 Posts
Yeah, it wasn't mine either but then I blew my engine trying to run 9s with the stock block and stock 4l60e, got damn close to with a 10.1. But now I have a **** ton of money invested and I'm not about to blow it getting too cocky with the boost. If I was rich I'd say **** it but I'm not so if I blow this engine I'm stuck with no boost and no fun and for a long time. I'll be just fine with 20psi. I'm not looking to break records, I just want a consistent 9 second car and a lot of people are running a lot faster than that with a lot less boost than I'm making. So what's the point? To say I run more boost than you? Not worth it.