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Grams, AEM or Walbro Fuel Pump for SC Build - Which is Preferred?

Old 10-31-2018, 06:18 AM
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Cool Grams, AEM or Walbro Fuel Pump for SC Build - Which is Preferred?

Vortech SC build on '00 AP1 aiming for 350-400WHP. Been looking at fuel pump options. Not planning on running E85.

This Grams any good? Grams Performance 255Lph Generic Fuel Pump Kit | Evasive Motorsports

Does the AEM 320LPH need a higher gauge wiring than stock? AEM 320L In Tank Fuel Pump Kit | Evasive Motorsports

Walbro 255LPH good enough? Is it too noisy? Walbro Fuel Pump - 255LPH (HI PRESS.) | Evasive Motorsports

Any recommendations, advice, etc welcome
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Old 10-31-2018, 08:37 AM
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Grams is crap and AEM 320 is not recommended unless you upgrade the factory wiring.
Walbro GSS342 is the correct model and that's what I would recommend for you my friend, and no I don't think its noisy at all
LHT recommends them and use them on all their SC setups, skip to 1:35 for fuel pump comparison.
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Old 10-31-2018, 04:11 PM
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Walbro is an OEM supplier. None of the others you listed are. Walbro offers a 450 and a 525 lph pump, and SOS offers a plug and play option. What more can you want?
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Old 10-31-2018, 04:39 PM
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I've used an aem320 with great success, now on a walbro450 to squeeze out a little more fuel but ended up being limited by the turbo haha. For your goals it seems a 255 should be fine but yes, that pump is loud. The aem primes like a mother but operates like stock (quiet). The walbro450 is quiet all around. Regardless what pump you use install the sos fuel pump wiring kit.
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Old 10-31-2018, 11:17 PM
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Originally Posted by flanders View Post
Grams is crap and AEM 320 is not recommended unless you upgrade the factory wiring.
Walbro GSS342 is the correct model and that's what I would recommend for you my friend, and no I don't think its noisy at all
LHT recommends them and use them on all their SC setups, skip to 1:35 for fuel pump comparison.
https://youtu.be/KZebwlTreK4?t=95
Thanks mate

I was concerned about the AEM needing upgraded wiring which you clarified it does. I'll watch this video too.
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Old 10-31-2018, 11:19 PM
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Originally Posted by bruthaboost View Post
Walbro is an OEM supplier. None of the others you listed are. Walbro offers a 450 and a 525 lph pump, and SOS offers a plug and play option. What more can you want?
Never considered SOS. I'll look into it. I think 450 or more will be overkill for my goals.
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Old 10-31-2018, 11:20 PM
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Originally Posted by Mijae007 View Post
I've used an aem320 with great success, now on a walbro450 to squeeze out a little more fuel but ended up being limited by the turbo haha. For your goals it seems a 255 should be fine but yes, that pump is loud. The aem primes like a mother but operates like stock (quiet). The walbro450 is quiet all around. Regardless what pump you use install the sos fuel pump wiring kit.
You must be making some big power! I'd rather not remove the factory wiring. Any reason why you recommend I do so even if the fuel pump doesn't require upgraded wiring?
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Old 11-01-2018, 02:12 AM
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I ran most of all the fuel pumps out there. They will all support your power goals. I started with the walbro 255 then i went to the aueromotive 320 then the aem 320 and now i run the walbro 450. And not to long ago them came out with the walbro 525. They all cost about the same and if your going through the trouble of changing the pump you might as well go for the walbro 450 or 525. I highly recommend the science of speed fuel pump rewire kit no matter which pump you get. The stock fuel pump wiring is very small and will not provide enough power to the after market pumps. Sometimes you can get away with the stock wiring with a walbro 255 but after a while the pump is known to flow less with the stock wiring. Plus this pump is very loud and it can get annoying. All the other pumps are quiet like stock. Back 8+ years ago everybody ran the 255 because there no no other options besides a external pump like a aueromotive a1000. Now a days there is no point to run a 255

Just get the walbro 525 and the sos rewire kit.
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Old 11-01-2018, 05:57 AM
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Originally Posted by riceball777 View Post
I ran most of all the fuel pumps out there. They will all support your power goals. I started with the walbro 255 then i went to the aueromotive 320 then the aem 320 and not i run the walbro 450. And not to long ago them came out with the walbro 525. They all cost about the same and if your going through the trouble of changing the pump you might as well go for the walbro 450 or 525. I highly recommend the science of speed fuel pump rewire kit no matter which pump you get. The stock fuel pump wiring is very small and will not provide enough power to the after market pumps. Sometimes you can get away with the stock wiring with a walbro 255 but after a while the pump is known to flow less with the stock wiring. Plus this pump is very loud and it can get annoying. All the other pumps are quiet like stock. Back 8+ years ago everybody ran the 255 because there no no other options besides a external pump like a aueromotive a1000. Now a days there is no point to run a 255

Just get the walbro 525 and the sos rewire kit.
Thanks for the tips. Rewiring is something I only want to consider as a last resort. How much are we looking at for the rewiring kit from SOS? Why is the 255 Walbro so loud and annoying when the higher flow rate models are quiet? Will I hear it when driving slow and fast? I'm all for the 450 if it would run on stock wiring but I suppose if the rewiring kit is inexpensive and is 'plug 'n play' then I'll go for it.
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Old 11-01-2018, 06:21 AM
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Does anyone know what flow rate fuel pump Vortech supplied with their '04-05 V2 kits?
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