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Originally Posted by goatnipples2002
You can actually get 30mpg with the 3800 s/c?
I can't seem to find any sites that are selling the L67, would you be able to help me there? Is the 3800 a direct bolt in?
The 90's camaro/firebird engine sounds like a damn good idea. I know I should be able to find one for cheap, but I would rather have the 3800 s/c. Why would I need the 3800 tranny, the getrag won't bolt up? I know if it bolts up it can handle the 3800.
Someone also told me to get the 3.4 dohc, do you know what that is in and if it is worth it? Anything would help.
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I'm getting 28 mpg with my 3800sc in a 99 Buick Regal which weighs 1000 pounds more than a Fiero. The 3800 is not quite a direct bolt on. The getrag can bolt to the 3800, but in today's engine, the ECM (computer) that runs the car is expecting an automatic transmission. Since most all 3800 sc engines come from cars with automatics. If you want a getrag 5 speed transmission, you'll need to reprogram the ECM. Also the wiring harness to mate a 3800 to a Fiero needs to be created or purchased. Cost to purchase varies from $800-1500 for the wiring harness.
A 3.4 DOHC is a screaming engine that also requires some work to install. There are reliability issues with those engines and many "junkyard" 3.4 DOHC engine have high milage or were beat, so a rebuild may be needed to get reliability.
There are many more pushrod 3.4 engines around to choose from. The basic 3.4 has about 40 more HP than the stock 2.8 and if it needs some refreshing performance internal components can be added.
My 88 had a 3.4 crate engine installed plus a 440T four speed auto transmission and it gets about 29 mpg over the road, driving sanely.
You can look up JEGS for engine replacements, but most of those are pricey new or remanufactured engines.