HPFP differences

[Lowrider1976]

So the capabilities of the xdi35 hpfp and xdi35 evo spec differences have me wondering. Obviously the evo has better flow especially under higher pressures, but at what point does that become a need? Will the regular xdi35 be fine running stock turbos or could it be useful to go that extra mile without a turbo upgrade? I don't see myself doing a turbo upgrade anytime soon, but where there isn't a huge cost difference I'm wondering if there's a benefit of the evo before that point?

 

[GotGrip?]

The XDI-35 is more than enough to run everything you can buy for these cars plus e30 fuel if you want to save the money.

 

[76FoMoCo]

So the capabilities of the xdi35 hpfp and xdi35 evo spec differences have me wondering. Obviously the evo has better flow especially under higher pressures, but at what point does that become a need? Will the regular xdi35 be fine running stock turbos or could it be useful to go that extra mile without a turbo upgrade? I don't see myself doing a turbo upgrade anytime soon, but where there isn't a huge cost difference I'm wondering if there's a benefit of the evo before that point?

I have the xdi35 and bigger trubiskis and it is more than plenty. now if you go full e85 I can see the need for the evo pump.

 

[Lowrider1976]

Thanks for the feedback you guys. I presumed it would be sufficient but they make a bigger one for some reason right? Made me wonder why

 

[Purple Sho]

Thanks for the feedback you guys. I presumed it would be sufficient but they make a bigger one for some reason right? Made me wonder why

Im in the same boat i have full bolt ons minus GH Intercooler and am trying to figure out which one to buy, Im never gonna run E cause i live in the middle of nowhere with no E fuel anywhere near me but i figure since im already spending that kind of money i might as well spend the extra 200 for the EVO pump, i mean if i dont **** it up with the wet nitrous kit i might go bigger turbos... or BIG turbo.

 

[yaycandy]

Im in the same boat i have full bolt ons minus GH Intercooler and am trying to figure out which one to buy, Im never gonna run E cause i live in the middle of nowhere with no E fuel anywhere near me but i figure since im already spending that kind of money i might as well spend the extra 200 for the EVO pump, i mean if i dont **** it up with the wet nitrous kit i might go bigger turbos... or BIG turbo.

You can get a tune for 100 octane, boostane can be bought on amazon cheap and add 1 bottle into the tank at fill up takes 93 octane to about 102 or so. I had e40 tune and 100 octane tune and the gas tunes are always more power, at least for my car on the dyno. Plus i dont have to worry about mixing. I live within a few miles of a few race tracks so i can easily get sunoco race fuels at the pump as i do. But boostane on amazon is an easy way to bump up octane if you cant get race gas locally or 93 octane.
There is a chart on the back of the bottle. Not sure what it makes 87 or 91 octane into but it gets 93 octane over 100 octane.

 

[FiveLeeter918]

I ran the XDI-35 on my car with every modification but turbos and meth. On E50 the car had beautiful pressure but running e70 (our pump e85) it started to struggle. We had a customer sell us his XDI-60 back at a really good price after he totalled his car, so I sold my 35 to a local customer and installed the 60.

I do have bigger turbos and a ported intake manifold sitting on the shelf along with XDI+50 injectors, because why not, but I doubt I'll ever benefit from them other than the better engineering construction and "hoping" that I never stick an injector by having upgraded components.

 

[Lowrider1976]

You can get a tune for 100 octane, boostane can be bought on amazon cheap and add 1 bottle into the tank at fill up takes 93 octane to about 102 or so. I had e40 tune and 100 octane tune and the gas tunes are always more power, at least for my car on the dyno. Plus i dont have to worry about mixing. I live within a few miles of a few race tracks so i can easily get sunoco race fuels at the pump as i do. But boostane on amazon is an easy way to bump up octane if you cant get race gas locally or 93 octane.
There is a chart on the back of the bottle. Not sure what it makes 87 or 91 octane into but it gets 93 octane over 100 octane.

I'm intrigued. So what do you add like a half cup for 4 gallons at the track? Because I certainly wouldn't want a full tank doing runs. I was thinking about buying 108 octane race fuel by the 5 gal pail. That would definitely be more convenient. I see they also offer 113 octane boostane have you tried that? Anyone tune for that rating? Whoa

 

[802SHO]

In my experience the XDI35, the DW300C LPFP with stock injectors is a great all around combo. That fueled my car to an 11.0. Among other things…..

Bigger is usually better and it still is but the low pressure fuel pump is a serious problem. That needs to be addressed by someone and I’m not sure how far @Ecoboost_xsport has gone with his custom dual pump. After installing XDI 2000 cc injectors and upgrading to the EVO HPFP the bottleneck is clearly the DW300C lpfp. While also spraying 1500 cc of meth I was actually having dips in rail pressure while going WOT, at which you almost always have a cute little boost spike.

Rail pressure dipping to 1100-1300 with nearly 4K in fuel upgrades is less than ideal. I NEVER had a fuel pressure dip with stock injectors, XDI35 and the DW300c. However, despite that drop in rail pressure on WOT, the car did recover, although max rail pressure was down slightly around 2400-2500 compared to always seeing it up near 2800, the car did run much faster overall for some street times that made me think I don’t even need nitrous……Attributing that to those larger injectors. So the solution for now would look like we need a boost a pump for that lpfp. And I’m not talking about the stock lpfp, the DW300C lpfp is NOT adequate with larger injectors.

I’ve since upgraded to the XDI60 HPFP like @FiveLeeter918, but as of right now I don’t have a boost a pump…..damn sure I’ll need one when I’m ready to get back on the road.

Idk if some might think it’s ok…but as someone who likes to review their own data logs, seeing a problem where there wasn’t a problem before, only makes you want to fix it, and thus keeping the DW300c is not sufficient.

 

[Lowrider1976]

In my experience the XDI35, the DW300C LPFP with stock injectors is a great all around combo. That fueled my car to an 11.0. Among other things…..

Bigger is usually better and it still is but the low pressure fuel pump is a serious problem. That needs to be addressed by someone and I’m not sure how far @Ecoboost_xsport has gone with his custom dual pump. After installing XDI 2000 cc injectors and upgrading to the EVO HPFP the bottleneck is clearly the DW300C lpfp. While also spraying 1500 cc of meth I was actually having dips in rail pressure while going WOT, at which you almost always have a cute little boost spike.

Rail pressure dipping to 1100-1300 with nearly 4K in fuel upgrades is less than ideal. I NEVER had a fuel pressure dip with stock injectors, XDI35 and the DW300c. However, despite that drop in rail pressure on WOT, the car did recover, although max rail pressure was down slightly around 2400-2500 compared to always seeing it up near 2800, the car did run much faster overall for some street times that made me think I don’t even need nitrous……Attributing that to those larger injectors. So the solution for now would look like we need a boost a pump for that lpfp. And I’m not talking about the stock lpfp, the DW300C lpfp is NOT adequate with larger injectors.

I’ve since upgraded to the XDI60 HPFP like @FiveLeeter918, but as of right now I don’t have a boost a pump…..damn sure I’ll need one when I’m ready to get back on the road.

Idk if some might think it’s ok…but as someone who likes to review their own data logs, seeing a problem where there wasn’t a problem before, only makes you want to fix it, and thus keeping the DW300c is not sufficient.

That's very good information @802SHO. So at what point did the dw300c become needed? I'm wondering with stock turbos and injectors and the xdi35 will there be sufficient pressures or will I end up over taxing the stock lpfp then? Does that become a need once you are pushing the fuel system along with upgraded turbos, or perhaps the dw300c is best used simply after upgrading to the xdi35 regardless of having upgraded anything else?

 

[802SHO]

That's very good information @802SHO. So at what point did the dw300c become needed? I'm wondering with stock turbos and injectors and the xdi35 will there be sufficient pressures or will I end up over taxing the stock lpfp then? Does that become a need once you are pushing the fuel system along with upgraded turbos, or perhaps the dw300c is best used simply after upgrading to the xdi35 regardless of having upgraded anything else?

You’ll want to pair the XDI35 with the DW300C in my opinion for overall performance and function. The DW300C is less than $200 if I recall

 

[Lowrider1976]

You’ll want to pair the XDI35 with the DW300C in my opinion for overall performance and function. The DW300C is less than $200 if I recall

It is under 200 bucks. I thought I had everything ordered for now though. I feel a little like I'm getting Colombo'd "just one more thing" lol.

 

[802SHO]

It is under 200 bucks. I thought I had everything ordered for now though. I feel a little like I'm getting Colombo'd "just one more thing" lol.

Omg the “one more thing” thing never stops

 

[Lowrider1976]

Omg the “one more thing” thing never stops

I'm seeing that trend no doubt

 

[Lowrider1976]

It is under 200 bucks. I thought I had everything ordered for now though. I feel a little like I'm getting Colombo'd "just one more thing" lol.

Any use in installing the lpfp before the hpfp? Because my xdi35 is weeks out yet before I'll see it.

 

[76FoMoCo]

when i did my xdi35 the first log show the rail pressure drop to around 1300. when i sent it to Matt he noticed that sct had some tables missing / not adding for my strategy for the lpfp. he had them added and now my lpfp has no problem keeping up. only running 17-18 psi and bigger turbos and it doesn't miss a beat. stock injectors tho.

 

[Lowrider1976]

when i did my xdi35 the first log show the rail pressure drop to around 1300. when i sent it to Matt he noticed that sct had some tables missing / not adding for my strategy for the lpfp. he had them added and now my lpfp has no problem keeping up. only running 17-18 psi and bigger turbos and it doesn't miss a beat. stock injectors tho.

@76FoMoCo do you mean that you still had or have the stock lpfp?

 

[76FoMoCo]

@76FoMoCo do you mean that you still had or have the stock lpfp?

yes I'm still running the stock lpfp with not fuel problems.

 

[802SHO]

I’ve only ran them both starting at the same time but I think before the lpfp upgrade was available some ppl had some issues adding an upgraded HPFP. But sounds like tuning caught up to that.

But for the cost I figured why not pair them and also it doesn’t require a retune it just does what it does, so no harm in installing beforehand.

 

[FiveLeeter918]

In my experience the XDI35, the DW300C LPFP with stock injectors is a great all around combo. That fueled my car to an 11.0. Among other things…..

Bigger is usually better and it still is but the low pressure fuel pump is a serious problem. That needs to be addressed by someone and I’m not sure how far @Ecoboost_xsport has gone with his custom dual pump. After installing XDI 2000 cc injectors and upgrading to the EVO HPFP the bottleneck is clearly the DW300C lpfp. While also spraying 1500 cc of meth I was actually having dips in rail pressure while going WOT, at which you almost always have a cute little boost spike.

Rail pressure dipping to 1100-1300 with nearly 4K in fuel upgrades is less than ideal. I NEVER had a fuel pressure dip with stock injectors, XDI35 and the DW300c. However, despite that drop in rail pressure on WOT, the car did recover, although max rail pressure was down slightly around 2400-2500 compared to always seeing it up near 2800, the car did run much faster overall for some street times that made me think I don’t even need nitrous……Attributing that to those larger injectors. So the solution for now would look like we need a boost a pump for that lpfp. And I’m not talking about the stock lpfp, the DW300C lpfp is NOT adequate with larger injectors.

I’ve since upgraded to the XDI60 HPFP like @FiveLeeter918, but as of right now I don’t have a boost a pump…..damn sure I’ll need one when I’m ready to get back on the road.

Idk if some might think it’s ok…but as someone who likes to review their own data logs, seeing a problem where there wasn’t a problem before, only makes you want to fix it, and thus keeping the DW300c is not sufficient.

So you're saying you want to buy this Vortech BAP I have sitting here...