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Project 1967 Camaro

 
Old 11-02-2017, 02:27 PM
  #101  
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For sure the reluctor discussion is far from over.

As for fuel pumps the OG race only guys almost ALL run belt drive mechanical pumps. Us electric guys man there is some wildly varying approaches. Iirc mighty Mouse went 8's on three 255's dangling loose in the tank held together with hose and regular hose clamps.

I saw a thread once with a couple of well known aftermarket jumbo pumps taken apart only to show a couple or three standard fuel pumps in there so?

I was almost all set on using a couple of Bosch pumps but they have become so prone to knock offs its hard to find real ones. In personal use I have had excellent results with the 255 walboros in terms of durability and good pressure. Maybe thats the way to go?

Be interesting to see what you end up using here. Still lots for us to learn


Fun times putting a car like this together

Last edited by cam; 11-02-2017 at 02:57 PM.
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Old 11-02-2017, 03:26 PM
  #102  
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I won't go to a belt drive pump, I won't be at that level.

Today I'm not planning to run mutiple 450s. Still researching.

Looking into Magnafuel and Weldon right now.
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Old 11-02-2017, 03:28 PM
  #103  
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Weldon has a very good rep with their regulators. Got a link to the model your after?
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Old 11-02-2017, 04:09 PM
  #104  
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2035 or 2345

I talked to Jim Craig over there today, he said the 2035 can handle 1100rwhp on E85. I just asked about that model because a local contact is selling one.

Side note, I have to be honest, Over the last 20 years of LS modding, I've become way less of a spendthrift and much more of a miser. So talking about $1500 fuel systems is something I struggle with haha.
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Old 11-02-2017, 04:18 PM
  #105  
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I hear ya. My grandpappy used to always say "you can only spend it once" so I try and impart that on value. Sometimes it is both best and safest to spend dough and get the good stuff though. Fuel systems and boost kind of fit that model. Scope creep is a sumbiatch eh
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Old 11-02-2017, 04:27 PM
  #106  
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Originally Posted by cam View Post
Us electric guys man there is some wildly varying approaches.
I agree with that!

I have an intank 340 and an external 4303 that comes on at 30% throttle. If I could do it all over again I would to a cable drive in the rear and have been done with it, with plenty of room to grow.
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Old 11-02-2017, 04:29 PM
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Cable drive off the diff?
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Old 11-02-2017, 04:35 PM
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No belt driven off of the front of the motor and a cable to the pump in the rear to avoid prime issues.
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Old 11-02-2017, 04:39 PM
  #109  
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Ahh I see. Too bad cars weren't 24 or 32 volts, that would make this whole ordeal a whole hell of a lot easier to manage
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Old 11-02-2017, 04:53 PM
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I've had buddies make 1000-1100rwhp with twin 450's and single Weldons, so I don't see me going cable drive with my budget'y build.
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Old 11-02-2017, 07:42 PM
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Originally Posted by Pro Stock John View Post
I've had buddies make 1000-1100rwhp with twin 450's and single Weldons, so I don't see me going cable drive with my budget'y build.
Two true aem 380 mounted in tank Y'ed to one 8an feed to referenced reg have done well for me at 75psi base pressure. This is on e85.
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Old 11-03-2017, 06:19 AM
  #112  
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Originally Posted by purple73 View Post
Two true aem 380 mounted in tank Y'ed to one 8an feed to referenced reg have done well for me at 75psi base pressure. This is on e85.
Two of the AEM pumps will go pretty far.
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Old 11-03-2017, 07:28 AM
  #113  
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AEM lists their Ethanol compatible pumps at 320LPH

Alc based fuels and flow through style pumps are not ideal. Makes me wonder why we dont see more brushless fuel pumps? More efficient, cheaper to make, and can seal the internals to avoid alc dissolution problems. There are some on market but they are pricey! The bigger/better aftermarket pumps isolate the motor from the pump similar to hydraulic pumps but again cost and size issues.

I'm thinking a flex fuel compatible OEM pump ganged up might be the most reliable for street guys on E85. AEM pumps seem to have considerably poor reviews on some of the sales boards, but thats heresay from me so...


I did some reading and id go one of two routes;

1. Worry free top choice - Weldon 2345 ( Approx $1250.00 )

2. Two or three Walboro 400/450 e85 pumps ( approx $150ea )


Cost ratio is pretty vast; 4:1 difference between the two approaches.


I did also find the magnafuel 4103 which looks to be well made and the little info I read on it said good things. Its priced decently at $750.00

Last edited by cam; 11-03-2017 at 07:41 AM. Reason: Added magnafuel
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Old 11-03-2017, 09:00 AM
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Originally Posted by 408GT View Post
No belt driven off of the front of the motor and a cable to the pump in the rear to avoid prime issues.
I ran 1 4303 magnafuel, then 2......Now beltndriven off front, with rear cell....No cable, just use a single aem 340 for easy cranking.....shut that off when cruising, leave it on at track to back feed regulator on a hard 60ft....


I wish I would have skipped all the electric bull ****.... go belt driven and never think about your fuel system again.....my .02
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Old 11-03-2017, 09:57 AM
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Originally Posted by asubennett View Post
I ran 1 4303 magnafuel, then 2......Now beltndriven off front, with rear cell....No cable, just use a single aem 340 for easy cranking.....shut that off when cruising, leave it on at track to back feed regulator on a hard 60ft....


I wish I would have skipped all the electric bull ****.... go belt driven and never think about your fuel system again.....my .02
Strong opinion backed by experience, thats two votes for mech. What went wrong with the electric in your case? Does the mech pull throught the AEM when its off? How does that work?
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Old 11-03-2017, 09:59 AM
  #116  
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Appreciate all the comments. There are other options too, like the Holley pumps, Aeromotive...
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Old 11-03-2017, 03:20 PM
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Originally Posted by cam View Post
Strong opinion backed by experience, thats two votes for mech. What went wrong with the electric in your case? Does the mech pull throught the AEM when its off? How does that work?
Two seperate feeds from the cell, mechanical pulls on its own. 1.2 60ft or better with a front belt pump and a rear cell you will starve the pump, which is why at the track I leave the 340 on to back feed the regulator. The benefit is way easier cranking as well, cruising around the street I shut the electric off as soon as it cranks.

Electric for one are SUPER loud, cable is silent, you can hear more motor and turbo fun stuff. Also electric has a cap right of the bat, belt driven will support basically whatever evolving set up I choose. And lets be honest, you always end up wanting more power. 1 4303 on E85 was done at 900rwhp, probably earlier actually but we were leaning hard on it. Two 4303s behind 225 billet atomizers were at 85 percent duty around 1250rwhp.... As boost and fuel pressure rise, the electric pumps start sucking ***..... With a belt driven they start shining even more.....

I think people are scared of them for some reason but they are so far superior its not even close.
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Old 11-03-2017, 04:08 PM
  #118  
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Originally Posted by asubennett View Post
Two seperate feeds from the cell, mechanical pulls on its own. 1.2 60ft or better with a front belt pump and a rear cell you will starve the pump, which is why at the track I leave the 340 on to back feed the regulator. The benefit is way easier cranking as well, cruising around the street I shut the electric off as soon as it cranks.

Electric for one are SUPER loud, cable is silent, you can hear more motor and turbo fun stuff. Also electric has a cap right of the bat, belt driven will support basically whatever evolving set up I choose. And lets be honest, you always end up wanting more power. 1 4303 on E85 was done at 900rwhp, probably earlier actually but we were leaning hard on it. Two 4303s behind 225 billet atomizers were at 85 percent duty around 1250rwhp.... As boost and fuel pressure rise, the electric pumps start sucking ***..... With a belt driven they start shining even more.....

I think people are scared of them for some reason but they are so far superior its not even close.
You make a very compelling case here. What model pump do you recommend?
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Old 11-03-2017, 04:14 PM
  #119  
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My buddy Manna runs belt pump, I'll ask him about it more.
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Old 11-03-2017, 04:23 PM
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Originally Posted by Pro Stock John View Post
My buddy Manna runs belt pump, I'll ask him about it more.
I promise if you do it, it will be one of your fav things youve ever done to the car....
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