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View Full Version : Spectra-Premium vs Rock Valley on EFI gas tanks - opinions?



elagache
08-04-2011, 01:53 PM
Dear V-8 Buick faithful,

Those of you who have caught the irregular soap-opera staring my 65 Buick Special Wagon know I've further eroded my wallet by going with the EZ-EFI system on the big-block Buick engine Jim Weise is building for me (actually for her of course!! )

The latest question has been - ya'know supplying some gas to this engine! After the usual miseries, I've confirmed that this car needs an El Camino/Chevelle wagon gas tank. So I can indeed either go with an "off-the-rack" Spectra-Premium gas tank or I could have a custom tank made by Rock Valley.

Rock Valley wants a bit under $1200 for a custom version of the original tank. However, that does include all the mounting hardware and tank includes two baffles.

I haven't been able to find out if the Spectra-Premium tanks for EFI include baffles. That seems really important for fuel pump durability. Does anybody know? Assuming these tanks are baffled, the difference is cost is . . . . considerable. The GM37EFI tank:

http://ecat.spectrapremium.com/apps/ecat/mainfile.php?action=product_spec&module=product_catalog&product_code=GM37EFI&splash=false

can be had on the street for under $500. Given that my trusty wagon is siphoning my wallet at an alarming rate, I'm feeling the pinch to do some economizing here.

What is the opinions of the V-8 Buick crowd? :Smarty: Is this an item where once more the better quality of the custom Rock Valley product will give me returns in better reliability and durability, or . . . . can I spare my wallet some of this siphoning!!

Thanks in advance for all your help in getting my venerable wagon back to normal duties!

Cheers, Edouard :beer

offbrand Racing
08-04-2011, 04:39 PM
Cannot go wrong with Rock Valley. My guess would be that the spetrum stuff doesn't have everything you need in the way of baffles for an efi set. I suppose you could run a frame mount pump but I am sure the noise from the pump would drive you crazy over time. Sounds like a fun project :dollar:

72buicklt1
08-04-2011, 08:40 PM
I have the spectra tank and was told it has the fuel pump built in sump, the tank was very nice looking and fit perfectly. I haven't actually driven the car yet but have started it and my engine requires 44 lbs steady psi and the pump delivers no problem.. 72 skylark with lt1 motor
Dan C.