2G Fuel pump rewire...

[Mike_GSX]

Hi,

i'm going with an EVOIII Package from FP incl. 255 fuel pump,..,...

Do I have to rewire my fuel pump although in addition to that?

thanks a lot

Mike

 

[EclipseTrbo420A]

You probably wont need to rewire the fuel pump because that there supports alot more power than the car will make on the EVO III. I trust your getting a AFPR to go along with this other stuff? IF not, you should and when you do you can rewire it because it never hurts to have that extra fuel available.

Quickly....You dont have to rewire the 255, but you WILL need a AFPR. Goodluck.

Also that 1,145.00 is quite alot of money. Why don't you order eveything seperately? Like say 600 for turbo, 80 for pump http://cgi.ebay.com/ebaymotors/Walb...1QQihZ020QQcategoryZ33555QQrdZ1QQcmdZViewItem = 680, then a 2G install kit is about 150

Or even smarter would be this 2G solution kit. http://www.turbochargers.com/store/product_info.php?cPath=21_30&products_id=186

You can choose MHI Evo III or MHI B16G OR the EVO III GT-Read about that one. thats 700 and then all you need is the fuel pump and if you want a EVO III 02 housing.

What Im saying is your money is WAY better spent at Turbochargers.com IF you would have gone with FP you would have needed the install kit and paid way to much for that parts package. ALso if you look below the fuel pump is listed just under it for 80...buy it all there and save on some shipping. GOodluck.

 

[PC5505]

This thread is old as dirt but, you can always pick up an evo pump for nothing on evoM. The VIII has like a 190 or something and the IX has a 255 stock. Like 30 bucks.

 

[solidviper89]

the ix pump is a 255?

 

[casperfast]

This thread is old as dirt but, you can always pick up an evo pump for nothing on evoM. The VIII has like a 190 or something and the IX has a 255 stock. Like 30 bucks.

evo iv pump is only $30? and it will fit a 2g? and its 255? wow

 

[dsm-onster]

This thread is old as dirt but, you can always pick up an evo pump for nothing on evoM. The VIII has like a 190 or something and the IX has a 255 stock. Like 30 bucks.

I'm not calling you out. But do you have any info to support this? Us DSMers would be happy to know this as fact!!!

 

[xveganxcowboyx]

I'll have to look for the flow chart that's floating around here, but the evo IX pump flows just a little more than the VIII, but does not drop off at 65psi.


*edit*

You must be logged in to view this image or video.

 

[dsm-onster]

Thanx!

 

[DSMunknown]

The VIII has like a 190 or something and the IX has a 255 stock.

Yeah, the Evo 9 pump is definitely no where near the 255. But it is a direct bolt in part for the 2G people, just like the Evo 8 pump is. I'm actually having my Evo 9 pump flow tested over the summer to put some hard numbers down, instead of people saying stuff like "it flows a little bit better than the Evo 8." Don't you worry, I'll keep everyone informed.

Just not sure what voltage I should test it at - 12v and 14v or 12v and 14.5v. Decisions, decisions.

FWIW, I must disagree with you, Matt. Rewiring the fuel pump is always a great idea.

Now I'm just waiting to see if the Evo X pump will hook up to the 2G.

 

[dsm-onster]

There's too many Matt's here. . .

 

[Zmann42087]

This thread is old as dirt but, you can always pick up an evo pump for nothing on evoM. The VIII has like a 190 or something and the IX has a 255 stock. Like 30 bucks.

Yes, both the EVO VIII and IX pumps can be had for around $30 on EVOm but neither one has a 255 pump in it. Not even close.

The EVO IX pump flows close to a Walbro 190 but the EVO VIII flows less than that due to an internal pressure relief valve that opens up at 65-68psi (fuel pressure).

If your thinking about doing the EVO fuel pump mod, check out my old thread. Pay close attention to post number eleven.

 

[dsm-onster]

Is the above chart showing flow at 12v or 14v? The walbro 255 hp flows QUITE a bit less than the above graph from other sources. 265lph at 40 psi. Not 288lph. The other source measures at 13.5 volts not 14 volts, though. My battery charge voltage for a healthy stock alternator is around 13.7 volts. I've seen 14.2 at various points. That's a big flux and consequently fuel flow change if I'm pushing the walbro to the limit.

IF those graphs and measuring techniques to generate those graphs are correct, it looks like the evo IX is good for around 500 crank hp at 27 psi. And good for around 475 crank hp at 32 psi. The evo VIII is good for around 485 crank hp at 20psi. After that it all goes to hell. The evo VIII is great for someone with an evo 3 16g upgrade looking to keep a 20psi pump gas tune.

I wonder if there is a way to disable the internal relief valve on the evo VIII units. I'll bet an evo VIII unit in tank with your stock DSM pump in series after it will keep the fuel line pressure at the relief valve low (between the two pumps) and allow more flow. Since you already have a stock pump it would be easy to use get evo IX flow out of the evo VIII pump.

Are there overrun issues with the evo pumps?

 

[90laserRSfwd]

Just buy a damn walbro 255 and rewire it, seriously it's around $100 and you won't have issue's with running 2 pumps or using an evo pump, or whatever. I don't understand why everyone tries to always concoct a bunch of stuff, just use what's proven. We're talking about fuel delivery here, something that if not up to par when your tuning, will ruin an engine in a hurry. Not worth the risk for a $100 pump, sorry I'm not angry I'm just working my 1g today

 

[dsm-onster]

Just buy a damn $200+ AFPR too!!! . . . $320 for a 255hp/190hp/190rewired plus the afpr; or possibly ten times less for an evoIX fuel pump if there are no overrun issues. It's worth looking in to. Which do you chose for a 400whp goal? You also get oem reliability with an evo pump.

 

[Zmann42087]

Another plus is the Denso made EVO pumps run nice and quiet. Walbro pumps are notorious for their whining noise. You'll get none of that with an EVO IX pump.

 

[DSMunknown]

^ Neither with the Evo 8 pump. I really don't care to hear the Wally wine. And as Matt already stated, you have the reliability of OEM. And it's not like these pumps are off of old beaten pieces-of-shits. They're off of high performing vehicles that have come off the manufacturing line quite recently. Plus, they're already broken in by the previous owners. No need to worry if the new part will work or not.

There's too many Matt's here. . .

I was refering to the other one.

Are there overrun issues with the evo pumps?

I never had any overrun issues with my non-rewired Evo 8 pump and OEM FPR.

Before I forget Matt, what do you recommend in terms of voltage when I send out the 9 to get tested?

 

[dsm-onster]

13.5 volts should cover everyone. If you're reading lower at your battery during idle you may have a problem. Doing it at 13.5 and 14 would be nice for a range.

So was the above mentioned testing and graphs done at 14volts? Regardless, you'll be doing another test with a known voltage.

I think the evo8 pump would be great if it weren't for the internal fuel bleed. Which is puzzling. At high fuel pressures where fuel demand is highest, what, suddenly the fuel pump shunts fuel back to the gas tank? If this is true, this isn't a shining moment in mitsu engineering . Unless there's another reason for this that escapes me at the moment.

I'm glad you're testing the evo9 pump. PLEASE keep us informed.

 

[DSMunknown]

As soon as I get back the test results, I'm sending all the relevant info over to RRE, posting them on EvoM, and making a final post in Nate's Fuel Pump and Injectors thread. I've been planning on doing this for about a year now. Don't think my head will fall off when I get some real results. I'm getting them for a reason, not just for my own knowledge.

BTW, thanks for the recommendation regarding the voltage. However, we also must keep in mind the rewiring process (and lack there of). Whether you're looking at RRE's fuel pump chart or Nate's thread, there are always two volts given, to try and mimic the OEM wiring and the upgraded process. This is why only choosing one may not be the best way to go. (Sure, we could say "Screw it" to those who negate the rewiring process, but I would rather be fair with everyone.) Additionally, posting the readings at different voltages will still leave room for speculation. Testing at the same two (or similar two) voltages would make for an open-and-shut case.

 

[DSMunknown]

Matt, I know you were interested in seeing all of the Evo OEM pumps hard at work. I added a couple links to Nate's thread here. Hope you like. Not sure if it's still worth testing out, unless I test at different voltages....

 

[dsm-onster]

Thanx I think that give us enough to compare against a walbro 255hp. Looks good!