boost increase.. need new fuel pump??
- Thread starter supastar2
- Start date
powercat6
Active member
Re: boost increase.. need new fuel pump??
You don't "have to" do anything; you could just throw on a multichip and a 3 Bar MAP and boost away, but that is not the wise thing to do.
A real Walbro 255 fuel pump (from a reputable source like SyTy Performance) and an adjustable fuel pressure regulator are considered reliability modifications for stock trucks, so they are important for running higher boost.
A year ago I talked to a Syclone owner who had a custom tuned truck that was running higher boost and his local GMC dealer had installed ten replacement stock fuel pumps over the years.
Extensive Datalogging is also crucial whenever you're modifying things.
You don't "have to" do anything; you could just throw on a multichip and a 3 Bar MAP and boost away, but that is not the wise thing to do.
A real Walbro 255 fuel pump (from a reputable source like SyTy Performance) and an adjustable fuel pressure regulator are considered reliability modifications for stock trucks, so they are important for running higher boost.
A year ago I talked to a Syclone owner who had a custom tuned truck that was running higher boost and his local GMC dealer had installed ten replacement stock fuel pumps over the years.
Extensive Datalogging is also crucial whenever you're modifying things.
Flyin Ryan
hated cuz he drives fords
Re: boost increase.. need new fuel pump??
If the fuel pump is unknown or stock then you should upgrade or you'll be running lean as a mofo and risking engine failure. Stock fuel pump is barley marginal at best for a stock truck let alone one that running higher boost.
If the fuel pump is already upgraded then toss the 3bar chip and map sensor in.
If the fuel pump is unknown or stock then you should upgrade or you'll be running lean as a mofo and risking engine failure. Stock fuel pump is barley marginal at best for a stock truck let alone one that running higher boost.
If the fuel pump is already upgraded then toss the 3bar chip and map sensor in.
![Quickstop [UK]](/data/avatars/m/5/5165.jpg?1570199786){kind=avatar}
Quickstop [UK]
Combating adversyty.
Re: boost increase.. need new fuel pump??
Put an alky kit in instead. :2cents:
Put an alky kit in instead. :2cents:
supastar2
New member
midnightbluS10
Banned
Re: boost increase.. need new fuel pump??
Or Ron Gregory at www.apeusa.com He's been supplying the syty crown with Walbros long before RPM. Even before RPM was Atomic Rooster. He's also the guy to thank for pointing out the knockoffs to the syty crowd and most of the rest of the aftermarket Walbro consumers.
Or Ron Gregory at www.apeusa.com He's been supplying the syty crown with Walbros long before RPM. Even before RPM was Atomic Rooster. He's also the guy to thank for pointing out the knockoffs to the syty crowd and most of the rest of the aftermarket Walbro consumers.
Quickstop [UK]
Combating adversyty.
Re: boost increase.. need new fuel pump??
Well, if you're gonna turn up the boost, you'll probably need to tune it as well so have you got a 3 Bar MAP ready to go or do you plan to tune it yourself?
You'll still need a 3 Bar and a wideband AFR gauge to do it properly but most people pull a bit of fuel as the alky comes on so you won't be maxed out on the injectors. I'm not sure at what pressure the stock fuel pump starts to struggle with flow though.
Basically you order the kit from alkycontrol.com and install the pump and reservoir then the nozzle. It's a really good kit and everyone not running E85 should be on methanol if turning the boost up.
It's an alternative to a fuel pump install but it might be more complex than you want if changing the fuel pump is a bit too daunting and it depends how much boost you want.
Personally, I'd do both
.
Well, if you're gonna turn up the boost, you'll probably need to tune it as well so have you got a 3 Bar MAP ready to go or do you plan to tune it yourself?
You'll still need a 3 Bar and a wideband AFR gauge to do it properly but most people pull a bit of fuel as the alky comes on so you won't be maxed out on the injectors. I'm not sure at what pressure the stock fuel pump starts to struggle with flow though.
Basically you order the kit from alkycontrol.com and install the pump and reservoir then the nozzle. It's a really good kit and everyone not running E85 should be on methanol if turning the boost up.
It's an alternative to a fuel pump install but it might be more complex than you want if changing the fuel pump is a bit too daunting and it depends how much boost you want.
Personally, I'd do both
.
midnightbluS10
Banned
Re: boost increase.. need new fuel pump??
I thought he mentioned the Turbotweak chip. In that case, the tuning is done and the chip is ready to rock. Still needs to Datalog, keep an eye on AFR's, and look at adding alky injection, though.
Well, if you're gonna turn up the boost, you'll probably need to tune it as well so have you got a 3 Bar MAP ready to go or do you plan to tune it yourself?
You'll still need a 3 Bar and a wideband AFR gauge to do it properly but most people pull a bit of fuel as the alky comes on so you won't be maxed out on the injectors. I'm not sure at what pressure the stock fuel pump starts to struggle with flow though.
Basically you order the kit from alkycontrol.com and install the pump and reservoir then the nozzle. It's a really good kit and everyone not running E85 should be on methanol if turning the boost up.
It's an alternative to a fuel pump install but it might be more complex than you want if changing the fuel pump is a bit too daunting and it depends how much boost you want.
Personally, I'd do both
I thought he mentioned the Turbotweak chip. In that case, the tuning is done and the chip is ready to rock. Still needs to Datalog, keep an eye on AFR's, and look at adding alky injection, though.
Re: boost increase.. need new fuel pump??
Why are you dreading doing a fuel pump? Its not too bad of a job to do really, I did mine by myself in my TY. You should be considering it especially if yours is the original pump. I would also consider using the Racetronix hotwire kit, it provides more voltage to the pump.
Why are you dreading doing a fuel pump? Its not too bad of a job to do really, I did mine by myself in my TY. You should be considering it especially if yours is the original pump. I would also consider using the Racetronix hotwire kit, it provides more voltage to the pump.
alwayscode390
pppssssshhhhhtttttttttttt
Re: boost increase.. need new fuel pump??
I didnt realize you could run the Alky kit without the 255lph fuel pump installed too. Makes sense though ---
I didnt realize you could run the Alky kit without the 255lph fuel pump installed too. Makes sense though ---
Flyin Ryan
hated cuz he drives fords
Re: boost increase.. need new fuel pump??
Although you canni would not because if your alky kit hiccups your motors toast.
Although you canni would not because if your alky kit hiccups your motors toast.
supastar2
New member
Re: boost increase.. need new fuel pump??
I'm very mechanical... I'm a union steel worker n mechanic for a manufactoring plant... I dread the time n effort into doin pump.. I'm on my 14th day of 16 days straight of 16hr days... time is always a key factor n lazynesss is unreal when not havin to work... lol... I do 99% of my own work but time kills me... I. Had my vac. Line ffrom boost selnoid fall off once n it overboosted for a split second but it pulllled like a raped date.... causin me to want to run it like +3lbs more... ill buy chip n mbc n 3bar but again too lazy n gettin cold to be laying out side to do a fuel pump.. lol. That's the reason of sayin turnin up boost without a pump.. I'm all stock just a cone filter n catless 3'' exhaust..... I even put up the offer to have someone do my valve seals but noone jumped on it.... it smoked for 3 seconds on startup... man my subbie was easy.. unplug boost selnoid n put inmbc n turn it up 3lbs n hook up cobbtuner n beat the dog sh*t out of it... lol
I'm very mechanical... I'm a union steel worker n mechanic for a manufactoring plant... I dread the time n effort into doin pump.. I'm on my 14th day of 16 days straight of 16hr days... time is always a key factor n lazynesss is unreal when not havin to work... lol... I do 99% of my own work but time kills me... I. Had my vac. Line ffrom boost selnoid fall off once n it overboosted for a split second but it pulllled like a raped date.... causin me to want to run it like +3lbs more... ill buy chip n mbc n 3bar but again too lazy n gettin cold to be laying out side to do a fuel pump.. lol. That's the reason of sayin turnin up boost without a pump.. I'm all stock just a cone filter n catless 3'' exhaust..... I even put up the offer to have someone do my valve seals but noone jumped on it.... it smoked for 3 seconds on startup... man my subbie was easy.. unplug boost selnoid n put inmbc n turn it up 3lbs n hook up cobbtuner n beat the dog sh*t out of it... lol
midnightbluS10
Banned
Re: boost increase.. need new fuel pump??
Doing the pump is like a 3 or 4 hour job at most in your driveway. The most difficult part is the fuel lines and electrical connections on top of the tank.
If everything goes perfect, I'd say two hours easily.
Doing the pump is like a 3 or 4 hour job at most in your driveway. The most difficult part is the fuel lines and electrical connections on top of the tank.
If everything goes perfect, I'd say two hours easily.
Flyin Ryan
hated cuz he drives fords
Re: boost increase.. need new fuel pump??
You can raise the boost if you can watch your fuel pressure to make sure it rises along with boost properly... Of course wb02 would really help prevent lean condition and damage to engine though... Your truck will prob pickup another 2psi in this cold weather anyways just the way it sits but gotta make sure fuel can keep up
You can raise the boost if you can watch your fuel pressure to make sure it rises along with boost properly... Of course wb02 would really help prevent lean condition and damage to engine though... Your truck will prob pickup another 2psi in this cold weather anyways just the way it sits but gotta make sure fuel can keep up