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s15rocket

Is a walbro 450 too big for 180rwkw?

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The walbro 255 on on my 180sx just died.

 

I'm planning on running e85 sometime in the future and don't want to replace it with a walbro 255 which is not considered e85 compatible unlike the walbro 450/460.

 

I already have upgraded wiring and relay but my concern is the walbro 450 will be too big.

 

 

I'm currently running stock injectors, stock FPR and about 10psi on a T28BB S15 turbo. Be lucky to be putting 150rwkw right now.

 

Eventually I want 270rwkw on e85. So I'd rather replace the pump with something half decent now so i dont have to change it later?

 

 

Should I get the walbro 450 or something smaller that's e85 rated like a DW200?

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Considering you have upgraded wiring already, if your FPR is working correctly, you should have no problems.

If you decide to go smaller, I used the DW300 myself.

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Considering you have upgraded wiring already, if your FPR is working correctly, you should have no problems.

If you decide to go smaller, I used the DW300 myself.

 

Well I was looking at the DW200 because its supposed to be equivalent to the walbro 255 in terms of pumping power only difference being the DW200 is e85 compatible.. DW300 is quite a lot more expensive than other pumps I noticed at $250.

 

You think the DW200 will serve its purpose for what I want? But probably wont happens for another 6 months (thats why i dont want to get anything too big right now) but I plan on getting a 2871r and using my standard cams, 740cc injectors DW200 and e85. Hoping for 250rwkw plus.

 

But I guess the real question is, is a fuel powerful fuel pump going to be a problem running on a lower powered car at all?

Edited by s15rocket

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I was lucky to get mine on special for about $200 a while back, but I take your point.

If you're aiming for 250rwkw+ on E85 in the near future, I don't think a 255 or DW200 would cut it.

DW300 might be enough at that power level, but as you say, a Walbro 450 is probably cheaper anyway.

A more powerful pump shouldn't be a problem, as long as the stock FPR can still effectively manage your fuel pressure.

That will be the determining factor, as current draw won't be an issue with upgraded wiring.

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Not much info on the DW200 but apparently it can support 750 bhp at 43 psi.

I also found a few people running walbro 255's on e85 (although its not recommended) pumping out 300rwkw and that is equivelent to the DW200. So Im not sure.

 

Anyway after a bit of research I found that an over size fuel pump (relative to the cars power) can actually cause the fuel to heat up to dangerous levels via the return line.

 

Link here for anyone interested.

 

I'm still tossing up between the dw200,dw300 and walbro 450.

 

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Considering the AEM e85 pump now. Pumps 320 lph at 43 psi which is better than the walbro 255 but not overkill like the walbro 450 for my power needs.

 

Reasonable priced and close to me in Brisbane. I wonder if will be easy to install in my 180? Already has a dead walbro 255 in it. Don't want any headaches installing this thing.

 

 

http://www.ebay.com.au/itm/AEM-E85-High-Flow-In-Tank-Fuel-Pump-50-1200-/172574364270?epid=1164564459&hash=item282e3bd26e:g:f9UAAOSwsW9Yxw8z

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Not much info on the DW200 but apparently it can support 750 bhp at 43 psi.

I also found a few people running walbro 255's on e85 (although its not recommended) pumping out 300rwkw and that is equivelent to the DW200. So Im not sure.

 

Anyway after a bit of research I found that an over size fuel pump (relative to the cars power) can actually cause the fuel to heat up to dangerous levels via the return line.

 

750bhp with a DW200? Mmm, not sure about that...

You're right about an excessively oversized pump heating up the fuel.

Depends how long until you're planning on upgrading everything.

If it's only a few months, you could get away with it.

No point in buying two fuel pumps if you can avoid it.

Edited by 200VIA

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I made 260rwkw on e85 with 740s, 255 and stock fpr. If I was to do it again I'll go top feed injectors, adjustable fpr and 460.

 

If you want to stay side feeds go 740s, adjustable fpr and bigger walbro.

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Not much info on the DW200 but apparently it can support 750 bhp at 43 psi.

I also found a few people running walbro 255's on e85 (although its not recommended) pumping out 300rwkw and that is equivelent to the DW200. So Im not sure.

 

Anyway after a bit of research I found that an over size fuel pump (relative to the cars power) can actually cause the fuel to heat up to dangerous levels via the return line.

 

 

750bhp with a DW200? Mmm, not sure about that...

You're right about an excessively oversized pump heating up the fuel.

Depends how long until you're planning on upgrading everything.

If it's only a few months, you could get away with it.

No point in buying two fuel pumps if you can avoid it.

 

 

Yeah definitely want to avoid having to buy another fuel pump. I read on the DW website that the DW300 will actually overpower the stock FPR and cause bad idle and other fueling problems so they recommend an upgraded FPR or stick with the dw200. Would be the same for walbro I assume.

 

I made 260rwkw on e85 with 740s, 255 and stock fpr. If I was to do it again I'll go top feed injectors, adjustable fpr and 460.

 

If you want to stay side feeds go 740s, adjustable fpr and bigger walbro.

 

Was that on e85? What turbo? Cams? I'd be very happy with 260rwkw. That's my goal. I want to stick with my stealth nismo 740cc side feeds and stock FPR. From my research 250rwkw is possible with a gt2871r turbo, stock cams on e85. So that is what I'm aiming for. So seems like the dw200 will do the job as its equivalent to a walbro 255 only difference being the dw200 is actually e85 compatible.

 

Dw200 is also well priced at $149 on ebay. Think I might go for that. Couple of youtube tutorials of people installing this pump on s13 as well.

Edited by s15rocket

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Yeah definitely want to avoid having to buy another fuel pump. I read on the DW website that the DW300 will actually overpower the stock FPR and cause bad idle and other fueling problems so they recommend an upgraded FPR or stick with the dw200. Would be the same for walbro I assume.

 

Ohhh really? I have been running a DW300 with stock wiring, injectors & FPR for about 6 months...

I haven't encountered any issues yet, but if I do, at least I now know that could be why.

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Non vct sr20, tomei procams, hypergear ss1.5 225kw on 98/260kw on united e85

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Non vct sr20, tomei procams, hypergear ss1.5 225kw on 98/260kw on united e85

 

With what fuel pump?

Edited by 200VIA

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Non vct sr20, tomei procams, hypergear ss1.5 225kw on 98/260kw on united e85

 

With what fuel pump?

 

Walbro 255

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Non vct sr20, tomei procams, hypergear ss1.5 225kw on 98/260kw on united e85

 

With what fuel pump?

 

I found a thread of an evo running 10's on a single rewired walbro 255 on e85. These pumps are more powerful than people think. Most people install a pump too big for their power needs i think.

 

https://www.evolutio...10-7-129-a.html

 

 

 

Non vct sr20, tomei procams, hypergear ss1.5 225kw on 98/260kw on united e85

 

With what fuel pump?

 

 

Walbro 255

 

 

No issues running e85 thus far on this pump?

Edited by s15rocket

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None at all, it's been running e85 for over a year now.

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A Walbro 255 can flow 177-215 l/h (12v to 13.5v) at 70 psi (25 psi boost) from typical graphs I have seen. Which is enough to max out 740cc side feed injectors (177 l/h) at up to 25psi boost. Just make sure they get enough volts.

 

However they are not E85 proof so expect a shortened life.

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Ended up getting the DW200.

 

Super quiet pump .Car has been running great since I installed it, but my only mistake was to cut the wires to the pump inside fuel tank so now the positive and negative terminals are only connected with a crimped noodle joiner. Hopefully this wont cause an explosion inside my tank lol :(

 

I really should of soldered it to the top of the tank. Anyway...all good so far

Edited by s15rocket

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