2.8-3.1 mod...? - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


Performance, Brainstorming & Tuning Talk about modifications, or anything else associated with performance enhancements. Have a new idea for performance/reliability? Post it here. No idea is stupid! (please use Detailing and Appearance for cosmetic ideas)

Reply
 
 
 
Thread Tools Search this Thread
Old 08-02-2010, 03:33 PM   #11
Senior Member
Posts like a Northstar
 
RobertISaar's Avatar
 
Join Date: Jul 2010
Location: Camden, MI
Posts: 615
Thanks: 0
Thanked 0 Times in 0 Posts
RobertISaar is on a distinguished road
Default

Quote:
Originally Posted by 3800_cruiser View Post
Could it be possible to use a 3x00 short block with the heads, intake, accessories, oil pan, sensors, and transmission for the fiero 2.8 v6? It seems to me if you could do that, the wiring wouldn't need as much changing, maybe need the ecm retuned a bit. You could retain the original look that way as well. This might be a far-fetched idea though.
possible to do, but you lose the important parts of the Gen3 top end: massive flow improvements over the Gen1/2 stuff. transmission also doesn't matter, all 60V6 and 90V6(3800 and 3.5DOHC anyway) engines have had the same bellhousing pattern for a LONG time, the first to break that rule was i believe the HFV6, but good luck dealing with those...

Quote:
Originally Posted by Jonpro03 View Post
I can tell you for sure that the 2.8 and the 3.1 have the same bore, but the stroke goes from 76mm to 84mm.
Everybody is right about upgrading to the 3x00 engines though. They are relatively cheap and plentiful. They drop in relatively easily too. You would not be able to run it with your fiero engine harness though since the old 2.8s used distributors. For me that would be a swap killer right there.

I have seen a couple of fiero'* that got the 3.1 turbo swap. If you could get a hold of one of those guys, they could tell you how they did the firewall connector and made the turbo harness work. Honestly, I cant think of anything more fun than a turbo fiero!
correct: GM made the 3.1 by increasing the stroke of the 2.8. if you stuck a 3.1 crank in a 2.8, you would have a 3.1...

a non-VVT 3500 from a malibu is ATM, one of the cheapest per HP almost-drop-in motors for anything that came with a 60V6 from the factory(with plenty of potential for more too with proper exhaust design). the stock fiero ECM isn't that great IMO, and only pushes out a 160 baud datastream, so tuning becomes much more of a guessing game than intelligent decisions based on known data.

there are people who have swapped in 1227730s(found in almost anything with a 660 since 1987 with the exception of w-bodies, fieros and 87-89 f-cars, possibly a few more) using the factory harness IIRC, and likely chopped the connectors off for the distributor and wired in the 60V6 DIS wastespark system. the pennocks(?) forum(fiero.nl IIRC) has MANY people who have done this, along with quite a few members on 60V6.
RobertISaar is offline   Reply With Quote
Old 08-03-2010, 12:36 AM   #12
Senior Member
True Car Nut
 
Jonpro03's Avatar
 
Join Date: Jul 2010
Location: Danville, Illinois
Posts: 2,469
Thanks: 0
Thanked 0 Times in 0 Posts
Jonpro03 is on a distinguished road
Default

Quote:
Originally Posted by RobertISaar View Post
a non-VVT 3500 from a malibu is ATM, one of the cheapest per HP almost-drop-in motors for anything that came with a 60V6 from the factory(with plenty of potential for more too with proper exhaust design).

If you do a nonvvt3500, you have to get a external crank trigger to make it work. Available at wot-tech.com
Jonpro03 is offline   Reply With Quote
Old 08-03-2010, 12:41 AM   #13
Senior Member
True Car Nut
 
Jonpro03's Avatar
 
Join Date: Jul 2010
Location: Danville, Illinois
Posts: 2,469
Thanks: 0
Thanked 0 Times in 0 Posts
Jonpro03 is on a distinguished road
Default

Which BTW, was my original plans for my turbo grand prix... a turbo 3500 will be ultimate pwnage. It is the easiest/cheapest power upgrade with only little things to have to worry about, like throttle linkage, exhaust plumbing, ect... and not have to worry about building a ecm to run it, because with the external crank trigger, the stock TGP harness and computer will run it.
Jonpro03 is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
First Mod=Mod Bug bonkjmma General GM Chat 21 03-03-2007 01:55 PM
Mod or Not To Mod redwingsfan34 General GM Chat 7 06-16-2006 06:30 PM
Series 1 L67....interested in a new mod? BIG mod? willwren Forced Induction 36 05-17-2006 10:58 PM
MOD OWNZ THIS THREAD but not this mod------------------- Gumball Lounge 1 01-02-2006 12:51 AM
My first real mod Blk_Bonneville Performance, Brainstorming & Tuning 9 09-20-2002 03:40 PM


Tags
2.8, 3.1, crankshaft

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 07:12 AM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.