Discussion in 'Generation 4 - Performance Upgrades' started by BrentB, Apr 14, 2021.
Meth or xdi pump to try e30 tune? Currently flex has 3 bar, GH tune, tstat and good plugs
Definitely go with XDI if you can afford it. Meth has its benefits but it's more maintenance and will become a fueling bottleneck again as you push more.
XDI is the safe choice. Meth can get the job done but it's a liability. Cost shows between the two. Personally I went XDI.
I'll be the devil's advocate here. Meth is MUCH cheaper, cleans the engine as it adds power and won't put you in a power range that starts to find other weak links (i.e. trans, turbos, intercooler) in the system.
Both Jordan and Fiveleeter are 'cutting edge' on our platform. They look at things that can break them into records. They are not looking at it as a daily driver looking to go a little faster and do it more consistently. Meth is great for a DD car with one caveat, DO NOT BUILD A TUNE THAT REQUIRES METH TO KEEP THE ENGINE SAFE.
HPFP without a doubt.
Hold out for someone selling a used one, when you're done with it or ready to move on you can sell it for just about what you paid for it. Way easier to install and remove than a meth kit too.
Not sure I'd call myself cutting edge, I'm slower than @ridered74 haha
I did just sell my XDI-35 for $1000 though.
I think you need the tune to be moderately dependent on meth otherwise it’s not utilizing the extra fuel and octane fully. Which leads to making meth kit choice very important. Be willing to throw down some extra cash here. My Alky kit cost me $900+. And it’s best to swap out the pump regardless of use ever 48 months or so. A rebuild is $85. A new pump is $160 or so. I have two pumps so I’m never without one.
Bc your goal is E30 I would go with an XDI pump. If you were just going to use 93 and no access to E85 then I would say get meth. They each have their pros and cons as far as installation and maintenance. Meth injection is a more complicated install. Once you’re done you fill up with meth, simple. Assuming you installed it properly there would be no leaks, nothing to really do except refill with meth. Your kit should have a low level sensor...if you’re low take it easy don’t go WOT at the next 5 stop lights. If you do an XDI pump the pump swap is very easy. You’ll need to mix fuel all the time and might want an ethanol sensor installed to make you aware of what your mix is at. If you can’t find any Ethanol stations I guess you could swap back to a stock tune file or 91-93 tune. And if you added meth after the fact you would have the extra fuel and octane from the XDI pump and ethanol mix...so if your pump failed you wouldn’t go boom. Looking at their power advantages from (93+meth tuned) to (E30 tuned) they are very similar......neither of them makes the other unvalued to overall performance. We’re strictly talking what order to do things in given what you have available to you and budget. Consider doing both in the future.
Which is exactly what I'll be running on my setup.
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In my opinion, either tune for meth or E30 should be a higher boost tune. In both instances relying on meth or the correct Emix is very important. So there isn’t too much of a difference regarding safety when you really dig in an analyze the tune specific fueling requirements. Both fuels are keeping knock at bay so it’s just not a great way to think that one is safer than the other. But it appears upgrading the HPFP is proven safer than using a stock HPFP running e30 in the winter. E30 on stock HPFP in cold months can lead to very low dips in fuel pressure.
HPFP’s there is Xtreme-DI and the LMS one. For meth there is Aquamist, Alky, AEM and Snow? Right? Meth has been around much longer and yeah some products fail...but which ones are more likely to? We know LMS had a pump fail. XDI? I don’t think there’s a lot of failures in general to be honest.
I assume it boils down to proper install/mixing and personal maintenance. Second to Vendor choice but I assume Vendor choice goes a long way as well.
Thanks very informative! I talked to Julio at Ally his kit is 699 vs v3 (my other choice ) at 450
Currently fight knock retard., I tried to isolate the wires but it didn’t have much effect. Maybe a bad tank of fuel? Gonna refuel later on today and see.
I went to the track last week and was a little disappointed, zero wheel spin brake boosted to 2200, And the best I ran was 13.90s 2.01 60 ft. 2300 da so it may have had something to do with it. I had to add some trans fluid since I encountered a shifting problem when leaving from a dig with no spin. Assuming it was sloshing.
this is for sure not my fastest car ever but it is the most fun. Lol
Leaning toward meth at this point. E85 is easy to get up here in Michigan, but down in Wichita Falls Texas where my car normally is I don’t see any available at the pump. Max octane there is also 91. Seems strange that 91 is the best octane you get in Texas
There's also ProMeth available as well.
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Methanol without depending on it for fueling is never going to be able to compete with the hpfp upgrade. That's my point here. Having a fueling dependancy on an auxiliary system can pose big boom issues. I have methanol and the hpfp. Methanol is awesome but can be dangerous when you depend on it and it disappears. When given the choice between the two I'll pick xdi all day long, but yes both is marvelous. I think @802SHO is an absolute mad man for how much methanol he's pushed from those couple jets but he also never had any failure so risk and reward!
yep, XDI all day.
To put in an XDI-60?
XDI for sure. Tbh both would be even better.
Wuuuut? 93 is pretty common down here in Texas. Valero, BP, Exxon, HEB, VP, all have 93. I think CEFCO only has 91. E85 has been really hard to get for the last couple months. Supposedly the snowstorm two months is still effecting supply
Yea, bought one 8 months ago in preparation for the turbo install...
Other parts of Texas no problem. Wichita Falls all are 91. Doesn’t make any sense.
I’d have to move I guess lol.
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