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  1986 fiero fuel pump, 3800

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1986 fiero fuel pump, 3800 by Lou6t4gto
Started on: 11-10-2013 06:56 PM
Replies: 6 (340 views)
Last post by: mikejhjr on 11-11-2013 01:28 PM
Lou6t4gto
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Report this Post11-10-2013 06:56 PM Click Here to See the Profile for Lou6t4gtoClick Here to Email Lou6t4gtoSend a Private Message to Lou6t4gtoEdit/Delete MessageReply w/QuoteDirect Link to This Post
will the stock (new) fuel pump in my 1985 2.8 6 cyl work for my 3800SC swap ? or do I have to replace it with something else ? What does the fuel pressure need to be for the 3800SC ? It's an absolutely Bone Stock engine with Automatic that will be a daily driver (Not Race) Thanks
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1fast2m4
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Report this Post11-10-2013 07:09 PM Click Here to See the Profile for 1fast2m4Send a Private Message to 1fast2m4Edit/Delete MessageReply w/QuoteDirect Link to This Post
I'm going to say no, not enough flow in that pump for even a stock L67, you not only have to think about the Fuel required by the more powerful motor, but the L67 runs at more static fuel pressure than the stock fiero and Newton's law is in full effect (A force in motion, will stay in motion until an equal and opposite... bla bla bla you get it) for every PSI of boost in the intake manifold you'll need an equal amount of fuel pressure on the rail side just to maintain the static fuel pressure in the rail.


Edit: as far as I know the L67's fuel pressure spec is 48-55psi


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1986 SE 3800SC/4t65eHD (12.871@104.96) I'll Sell it if you like
1985 GT 3800SC (swap in progress)

[This message has been edited by 1fast2m4 (edited 11-10-2013).]

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Lou6t4gto
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Report this Post11-10-2013 07:11 PM Click Here to See the Profile for Lou6t4gtoClick Here to Email Lou6t4gtoSend a Private Message to Lou6t4gtoEdit/Delete MessageReply w/QuoteDirect Link to This Post
So, What are the Choices ??
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1fast2m4
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Report this Post11-10-2013 07:17 PM Click Here to See the Profile for 1fast2m4Send a Private Message to 1fast2m4Edit/Delete MessageReply w/QuoteDirect Link to This Post
I used a slightly overkill Aeromotive 340lph intank pump (planing on E85) but AEM makes a more affordable 300LPH unit (about $120) Detachwerks is solid as well and around $110 all of those are are E85 ready. I'm not sure the part # but there is an over the counter GM replacement pump I'm sure someone will chime in. I think it's under $80 and for a 3rd gen TPI Camaro
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1fast2m4
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Report this Post11-10-2013 07:21 PM Click Here to See the Profile for 1fast2m4Send a Private Message to 1fast2m4Edit/Delete MessageReply w/QuoteDirect Link to This Post

1fast2m4

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ac delco ep381 for a 5.7L Tahoe

But I think I would recommend the Deatchworks DW200 or DW300 I've installed them in customers cars, the price is right and they do what they advertise.
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hnthomps
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Report this Post11-10-2013 08:28 PM Click Here to See the Profile for hnthompsClick Here to Email hnthompsSend a Private Message to hnthompsEdit/Delete MessageReply w/QuoteDirect Link to This Post
I am using a DeatschWerks 200 for a stock 3800 SC Series II (255 lph) and some people are using the DW 300 (320 lph) for a higher horsepower application.

Nelson
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mikejhjr
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Report this Post11-11-2013 01:28 PM Click Here to See the Profile for mikejhjrClick Here to Email mikejhjrSend a Private Message to mikejhjrEdit/Delete MessageReply w/QuoteDirect Link to This Post
I'm using an aeromotive pump as well. Do some research on the AC Declo and DW pumps. You have several options that all fit the factory hanger.
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