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Upgrade to bad fuel pump on stock V6 for upgrade later? by MulletproofMonk
Started on: 05-04-2014 05:24 AM
Replies: 11 (292 views)
Last post by: Dr.CGT on 05-06-2014 08:46 AM
MulletproofMonk
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Report this Post05-04-2014 05:24 AM Click Here to See the Profile for MulletproofMonkClick Here to visit MulletproofMonk's HomePageSend a Private Message to MulletproofMonkEdit/Delete MessageReply w/QuoteDirect Link to This Post
So I am picking up a car next week that needs a fuel pump. I'm looking for fuel efficiency, so I'm trying to decide if I want to do a 3800na motor swap on the car or maybe just look for a 4T60 with a 2.84 final drive ratio to put with the 2.8L...

So if I do a motor swap, I am going to need to upgrade the fuel pump and was wondering if swapping in the AC Delco EP-381 now is a bad idea. Will putting a EP-381 use more gas, flood the motor, etc?

The price difference between the Fiero Fuel Pump and the EP-381 at RockAuto is only $3.00-$4.00. I don't mind spending that if I don't end up upgrading the motor (and the EP-381 won't hurt anything), but I hate to spend $60+ on a fuel pump just to pull it out and throw it away... Also why does the 88 run a different fuel pump?
86 Fiero, ACDELCO Part # EP240 More Info {#25116162} GM Original Equipment $61.79
88 Fiero, ACDELCO Part # EP378 More Info {#25163468} GM Original Equipment, requires strainer 25121637 $62.79
Syclone, ACDELCO Part # EP381 More Info {#25163473} GM Original Equipment; does not include a strainer. $65.79

------------------
-Brian

My 87 GT Poly Suspension Upgrade (all pics) thread
Removing the roof panel
My HUD install thread
Modified stock air canister and base to 3.5 inch for 3800na

Isn't it strange that after a bombing, everyone blames the bomber, his upbringing, his environment, his culture, his mental state but … after a shooting, the problem is the gun?

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olejoedad
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Report this Post05-04-2014 06:12 AM Click Here to See the Profile for olejoedadClick Here to Email olejoedadSend a Private Message to olejoedadEdit/Delete MessageReply w/QuoteDirect Link to This Post
The stock v6 fuel pump runs a 4.9, it will run a N/A 3800 unless you turbo....
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sardonyx247
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Report this Post05-04-2014 07:48 AM Click Here to See the Profile for sardonyx247Click Here to visit sardonyx247's HomePageClick Here to Email sardonyx247Send a Private Message to sardonyx247Edit/Delete MessageReply w/QuoteDirect Link to This Post
The 381 just is capable of more pressure, your regulator will bring it down to stock Fiero levels.
So you will have no problem.
I just put one in a 3.4L, pressure is normal. Seems to run fine.
I used the airtex pump, not the AC Delco, but the results will be the same, (you know Delco is now made in china too)


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'87 Quad 4 H.O.
'87Blue GT 3.4L Swap Completed!!!!!!!! Boosted!!!!!!!
^^^^ Now in the Construction Zone^^^^
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Blacktree
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Report this Post05-04-2014 10:11 AM Click Here to See the Profile for BlacktreeClick Here to visit Blacktree's HomePageClick Here to Email BlacktreeSend a Private Message to BlacktreeEdit/Delete MessageReply w/QuoteDirect Link to This Post
Just out of curiosity, how much pressure can the EP381 pump handle?
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notaguru
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Report this Post05-04-2014 06:33 PM Click Here to See the Profile for notaguruClick Here to visit notaguru's HomePageClick Here to Email notaguruSend a Private Message to notaguruEdit/Delete MessageReply w/QuoteDirect Link to This Post
Since you'll be in there anyway, you'll have a chance to upgrade wiring to the fuel pump, and to refresh all connections. I use 10-gauge wire on my cars, with all soldered connections. I'll usually run the 10ga to the battery supply (via a fuse or fusible link), interrupting that direct circuit with a relay powered by the original circuit. Back in my Grand National days, that made a 2V difference at the pump!

Also, the Fiero fuel level sender was designed by the same GM maniac who did the dew wipes. It might make sense to replace the 0-90 ohm sender, and there's a good one on eBay for $22 shipped!

So if the tank's coming down anyway, think about optimization...
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MulletproofMonk
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Report this Post05-04-2014 08:18 PM Click Here to See the Profile for MulletproofMonkClick Here to visit MulletproofMonk's HomePageSend a Private Message to MulletproofMonkEdit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by olejoedad:

The stock v6 fuel pump runs a 4.9, it will run a N/A 3800 unless you turbo....


Why does the 88 use a different part number? Does is have higher pressure? Should I use that one?
86 Fiero, ACDELCO Part # EP240 More Info {#25116162} GM Original Equipment $61.79
88 Fiero, ACDELCO Part # EP378 More Info {#25163468} GM Original Equipment, requires strainer 25121637 $62.79

-Brian

[This message has been edited by MulletproofMonk (edited 05-04-2014).]

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olejoedad
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Report this Post05-04-2014 08:32 PM Click Here to See the Profile for olejoedadClick Here to Email olejoedadSend a Private Message to olejoedadEdit/Delete MessageReply w/QuoteDirect Link to This Post
Not sure, but the one pump does not include the strainer....
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sardonyx247
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Report this Post05-05-2014 07:08 AM Click Here to See the Profile for sardonyx247Click Here to visit sardonyx247's HomePageClick Here to Email sardonyx247Send a Private Message to sardonyx247Edit/Delete MessageReply w/QuoteDirect Link to This Post
None of them come with strainers.

Here lets make this EASY
http://www.ebay.com/itm/NEW...&vxp=mtr#ht_63wt_867
An old stock one, made in the USA

still need a strainer.

------------------
"DRIVE IT LIKE A FIERO"
'84 Fiero, engine to be determined '87 Duke (Sold)
'87 Quad 4 H.O.
'87Blue GT 3.4L Swap Completed!!!!!!!! Boosted!!!!!!!
^^^^ Now in the Construction Zone^^^^
Las Vegas Fiero Club Parts/Sales/Service/Club
Fiero Road Club Of Northern Nevada

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MulletproofMonk
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Report this Post05-05-2014 05:32 PM Click Here to See the Profile for MulletproofMonkClick Here to visit MulletproofMonk's HomePageSend a Private Message to MulletproofMonkEdit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by sardonyx247:
Here lets make this EASY
http://www.ebay.com/itm/NEW...&vxp=mtr#ht_63wt_867
An old stock one, made in the USA

still need a strainer.


Thanks sardonyx247. Point taken. $30 is cheaper then the Airtex at RockAuto...
I ordered the strainer from RockAuto and almost ordered the wrong one (Fiero TS1 instead of Typhoon TS7).
5% off rockauto with code: 2109224018966383
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mitchjl22
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Report this Post05-06-2014 01:51 AM Click Here to See the Profile for mitchjl22Click Here to Email mitchjl22Send a Private Message to mitchjl22Edit/Delete MessageReply w/QuoteDirect Link to This Post
To answer the OP... I planned on a 3800 swap and ran an EP381 on my 2.8 for a few months... no problems.

-Mitch
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sardonyx247
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Report this Post05-06-2014 02:33 AM Click Here to See the Profile for sardonyx247Click Here to visit sardonyx247's HomePageClick Here to Email sardonyx247Send a Private Message to sardonyx247Edit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by MulletproofMonk:


Thanks sardonyx247. Point taken. $30 is cheaper then the Airtex at RockAuto...
I ordered the strainer from RockAuto and almost ordered the wrong one (Fiero TS1 instead of Typhoon TS7).
5% off rockauto with code: 2109224018966383


I know, $30 is even cheaper than the airtex I found at $41, So I posted the Delco, as it is a "made in the USA' one still.
On a side note too, the airtex for the stock Fiero is a universal and supports ALOT of the higher HP cars, including the Buick GN.
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Dr.CGT
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Report this Post05-06-2014 08:46 AM Click Here to See the Profile for Dr.CGTClick Here to Email Dr.CGTSend a Private Message to Dr.CGTEdit/Delete MessageReply w/QuoteDirect Link to This Post
You may need to change the in tank wiring to match the pump on 84-86
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