Anyone using Sai Li fuel system?

[Tommy V]

There are plenty of people on this site running more boost and making more power than you with the sai li kit or a pieced together dual 350 pump setup and no issue. My STOCK single pump with a bap was supporting 700+ on e50. There's no way you should be going lean in your setup. Are you leaving the boost port on the regulator capped or open to atmosphere? Lund used to say to leave it open to atmosphere after setting your fuel pressure with the line attached. Not sure if that's how they're still tuning these setups. I'd also try reflashing your tune if you haven't.

Yep port left open,no boost reference,58psi,this is a very easy very easy kit to install.Also again a lot of guys say they are running 750 plus rwhp but when they go to the track their car runs like crap lol.I will get it straighten out and if I find something new that was tune related or bad pump I will come on here and post,but i.dont think that will be the case.I see cars at the track all the time posting big hp numbers on forums and then can't barely run a 10 sec pass.Itz either bad pump or they just are not enough for my car!!.Jon told me he had multiple guys having p problems with the gt350 pumps running out at 14 to 15 psi of boost on e85.

Sponsored

 

[Tommy V]

There are plenty of people on this site running more boost and making more power than you with the sai li kit or a pieced together dual 350 pump setup and no issue. My STOCK single pump with a bap was supporting 700+ on e50. There's no way you should be going lean in your setup. Are you leaving the boost port on the regulator capped or open to atmosphere? Lund used to say to leave it open to atmosphere after setting your fuel pressure with the line attached. Not sure if that's how they're still tuning these setups. I'd also try reflashing your tune if you haven't.

Also and this just my opinion I think the stock gt pump flows more then a.stock gt 350 pump.A gt pump will support 600 plus rwhp without a bap and your telling me the gt350 needs 2 of these for a car that makes 90 more hp and no more torque.

 

[higdominator]

Yep port left open,no boost reference,58psi,this is a very easy very easy kit to install.Also again a lot of guys say they are running 750 plus rwhp but when they go to the track their car runs like crap lol.I will get it straighten out and if I find something new that was tune related or bad pump I will come on here and post,but i.dont think that will be the case.I see cars at the track all the time posting big hp numbers on forums and then can't barely run a 10 sec pass.Itz either bad pump or they just are not enough for my car!!.Jon told me he had multiple guys having p problems with the gt350 pumps running out at 14 to 15 psi of boost on e85.

I run a boost reference to my regulator.

At 0 vacuum you have 58psi pressure, so that is what your injectors max flow potential is at a given duty cycle. Add 15 psi of boost to the manifold and you now have 15psi of pressure working against that 58psi, so now you are working with 43psi of rail pressure.

At 0 vacuum I have 55psi rail pressure and at 15psi I have 70psi rail pressure with a working pressure of 55 psi.

I think the average blower combo would be just fine running a static base pressure however bigger power/boost combos need this help unless you run a much larger injector that can provide the same flow at a less PSI. So a 1000CC injector at 43 psi vs a 1300 or 1500 at 43 psi, the larger injectors would flow more and would work with their setup much better.

Simple fix: run a boost reference and datalog, you should see an improvement.

Also and this just my opinion I think the stock gt pump flows more then a.stock gt 350 pump.A gt pump will support 600 plus rwhp without a bap and your telling me the gt350 needs 2 of these for a car that makes 90 more hp and no more torque.

GT's fuel starve in high G corners on a road course, GT350's have a significantly higher threshold. There is more reason behind the 350 running dual pumps than the flow.

 

[racingmason]

Id1050xs on e85 with the fpr set at 50 psi. 14lb pulley no issues.

I run a boost reference to my regulator.

At 0 vacuum you have 58psi pressure, so that is what your injectors max flow potential is at a given duty cycle. Add 15 psi of boost to the manifold and you now have 15psi of pressure working against that 58psi, so now you are working with 43psi of rail pressure.

At 0 vacuum I have 55psi rail pressure and at 15psi I have 70psi rail pressure with a working pressure of 55 psi.

I think the average blower combo would be just fine running a static base pressure however bigger power/boost combos need this help unless you run a much larger injector that can provide the same flow at a less PSI. So a 1000CC injector at 43 psi vs a 1300 or 1500 at 43 psi, the larger injectors would flow more and would work with their setup much better.

Simple fix: run a boost reference and datalog, you should see an improvement.





GT's fuel starve in high G corners on a road course, GT350's have a significantly higher threshold. There is more reason behind the 350 running dual pumps than the flow.

 

[Logan@Lethal]

800whp+ on e85 with a Sai Li kit on my car. Turbo car, though.

ID1050x injectors

 

[Reds197]

Yep port left open,no boost reference,58psi,this is a very easy very easy kit to install.Also again a lot of guys say they are running 750 plus rwhp but when they go to the track their car runs like crap lol.I will get it straighten out and if I find something new that was tune related or bad pump I will come on here and post,but i.dont think that will be the case.I see cars at the track all the time posting big hp numbers on forums and then can't barely run a 10 sec pass.Itz either bad pump or they just are not enough for my car!!.Jon told me he had multiple guys having p problems with the gt350 pumps running out at 14 to 15 psi of boost on e85.

Not a fan of this kit. I ran out of fuel on my Whipple set up using it. That being said, setting base pressure at 43 and running a boost reference will most likely solve the issue.

 

[LethalPerformance]

We've got plenty of Sai Li kits ready to go for anyone needing them. Great system at a very affordable price. Get with [MENTION=32524]Logan@Lethal[/MENTION] or myself if you have any questions and we'll be glad to assist you.

https://www.lethalperformance.com/sai-li-dual-pump-return-style-fuel-system-2011-2017-mustang-gt.html

 

[Tommy V]

I will give running a boost reference a try,so u.guys are saying to set it around 50 psi without vacuum line,base prezsure,then run a boost reference from my air I take in which would add about 14 psi of fuel pressure at full boost.

 

[Tommy V]

Id1050xs on e85 with the fpr set at 50 psi. 14lb pulley no issues.

I.agree and a lot of guys are not taking injectors in to account.1300 cc injectors do a lot better then id1000 injectors when pressure starts to drop off.The Id 1050x injectors are even a bit better then the Id 1000.

 

[beefcake]

I.agree and a lot of guys are not taking injectors in to account.1300 cc injectors do a lot better then id1000 injectors when pressure starts to drop off.The Id 1050x injectors are even a bit better then the Id 1000.

but that is a mask. if your dropping fuel pressure. not good!!!

 

[Reds197]

Stock fuel pump flow falls off quickly with more pressure. You can get more volume at lower pressure. The goal is trying to keep the flow volume up and pressure down to meet fuel requirements. Its a fine line but it may help.

Also E50 does not demand as much flow as E85. Here is another option for a band aid fix with cooling and anti knock gains very close to pump E85.

 

[awdtsi]

I'm sure most everyone already understands flow vs pressure vs voltage but here is a nice write up about it. http://www.mustangandfords.com/how-to/engine/m5lp-1304-fuel-pump-flow-test/

 

[Tommy V]

I'm sure most everyone already understands flow vs pressure vs voltage but here is a nice write up about it. http://www.mustangandfords.com/how-to/engine/m5lp-1304-fuel-pump-flow-test/

Yes sir that was a good write up and one I read,that is why I was saying how crazy it is how much better these modern pumps flow with just little voltage increases,or how much they can lose flow from just a 1 vollt drop,.

 

[kcc0521]

If you get a gauge on it we can see what is going on. It may not be dropping pressure. It could be the pressure difference when boost comes on that is hurting AFR.

 

[Tommy V]

If you get a gauge on it we can see what is going on. It may not be dropping pressure. It could be the pressure difference when boost comes on that is hurting AFR.

U well I think u need to cancel your trip this weekend and will drive down your house and we can do some testing lol.Ive been wanting to through a gauge on it,just need a cheap way to make one up so I can drive and see what's going on

Sponsored