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spec change for swap by sledcaddie
Started on: 10-04-2013 05:16 PM
Replies: 9 (162 views)
Last post by: Raydar on 10-05-2013 01:12 AM
sledcaddie
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Report this Post10-04-2013 05:16 PM Click Here to See the Profile for sledcaddieSend a Private Message to sledcaddieEdit/Delete MessageReply w/QuoteDirect Link to This Post
So, I read lots about swaps from 2.8 to the 3.4. The block is identical and all manifolds, etc just bolt right up? Also, is it really worth the cost? What's the horsepower of the 2.8 compared to that of the 3.4? Does the 3.4 push you into your seat?
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hiwil88formula
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Report this Post10-04-2013 05:21 PM Click Here to See the Profile for hiwil88formulaSend a Private Message to hiwil88formulaEdit/Delete MessageReply w/QuoteDirect Link to This Post
Yes everything bolts right up from the 2.8. As far as HP diff go, the factory 3.4 is rated at 160 hp, the 2.8 is rated at 135-140 hp. Torque is the biggest improvement with the 3.4 swap. I really enjoy driving mine, and it is also the cheapest swap around. I plan on getting mine dyno'd this weekend.
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trotterlg
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Report this Post10-04-2013 05:26 PM Click Here to See the Profile for trotterlgSend a Private Message to trotterlgEdit/Delete MessageReply w/QuoteDirect Link to This Post
Isn't the starter on the wrong side? Larry
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dobey
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Report this Post10-04-2013 05:31 PM Click Here to See the Profile for dobeySend a Private Message to dobeyEdit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by trotterlg:

Isn't the starter on the wrong side? Larry


Yes, but easily fixed with a drill and tap.
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trotterlg
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Report this Post10-04-2013 05:50 PM Click Here to See the Profile for trotterlgSend a Private Message to trotterlgEdit/Delete MessageReply w/QuoteDirect Link to This Post
So I guess it is not "identical". Larry
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NetCam
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Report this Post10-04-2013 07:09 PM Click Here to See the Profile for NetCamClick Here to visit NetCam's HomePageSend a Private Message to NetCamEdit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by trotterlg:

So I guess it is not "identical". Larry


Yes, of course.... the dreaded "Almost identical"
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dobey
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Report this Post10-04-2013 10:08 PM Click Here to See the Profile for dobeySend a Private Message to dobeyEdit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by trotterlg:

So I guess it is not "identical". Larry


Technically, no two blocks are "identical," even if they are both 2.8s out of Fieros. Slight variations in how the tools interact with the castings during machining, and various tolerance ranges, result in minor differences for every engine block ever produced. If you want to be pedantic about it.

The main differences between the 2.8 Fiero block and the 3.4 Camaro block is that the starter mount holes were machined on the other side, and the bore is larger on the 3.4.
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sledcaddie
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Report this Post10-04-2013 11:19 PM Click Here to See the Profile for sledcaddieSend a Private Message to sledcaddieEdit/Delete MessageReply w/QuoteDirect Link to This Post
So, you listed the horsepower, but stated the torque was the biggest change. What is the torque rating for both engines? Thanks for everyone's input.
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n7vrz
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Report this Post10-04-2013 11:32 PM Click Here to See the Profile for n7vrzSend a Private Message to n7vrzEdit/Delete MessageReply w/QuoteDirect Link to This Post
The torque for the L44 2.8 L engine in the Fiero is rated at 170 lb-ft.
The torque for the L32 3.4 L used in the Camaro and Firebird was 200 lb·ft.
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Raydar
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Report this Post10-05-2013 01:12 AM Click Here to See the Profile for RaydarSend a Private Message to RaydarEdit/Delete MessageReply w/QuoteDirect Link to This Post
When I was breaking in my 3.4, my only real observation was that the 3.4 was the engine that the Fiero should have come with, right out of the box.
That was before I pulled it back out to build it up. (First rule of hotrodding... If "more" is enough, then "too much" is just right.)

What makes it "worth the cost" is if your 2.8 has given up the ghost.
It's not really any more expensive to rebuild and swap in a 3.4 than it is to rebuild a 2.8.
And any mods that will work for a 2.8 will work even better for a 3.4.

[This message has been edited by Raydar (edited 10-05-2013).]

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