305tpi-350tpi Conversion computer??HELP??? - Hot Rod Forum : Hotrodders Bulletin Board
Hotrodders.com -- Hot Rod Forum



Register FAQ Search Today's Posts Unanswered Posts Auto Escrow Insurance Auto Loans
Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Electrical
User Name
Password
lost password?   |   register now

View Poll Results: Will a 87 350 TPI comp. work in my 86 trans am? Will a 86 corvete 350tpi comp work?
Corvete computer will work. 1 33.33%
87 Trans am computer will work. 2 66.67%
Neither...... 0 0%
Voters: 3. You may not vote on this poll

Reply
 
LinkBack Thread Tools
  #1 (permalink)  
Old 05-01-2005, 02:10 PM
Registered User
 
Join Date: May 2005
Location: NAS Brunswick, Maine
Posts: 1
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
305tpi-350tpi Conversion computer??HELP???

I own a 1986 trans am 305 tpi. I am in the process of installing a 350tpi in it. The problem i am coming across is that everyone i have asked doesn't seem know the answer to:what prom or computer do i use? Will a 1987 350tpi computer work in my 86 trans am? Pontiac didn't produce 350tpi in the trans am's til 1987. I am also curious if a 1986 corvete 350 tpi computer could possibly work? I know i am not the first or last person to do this coversion. If anyone could help me out I would be forever grateful. Thanks for the help. The engine in the car is a blown 305 with a connecting rod through my oil pan. The new engine is a remanufactured 350 with my tpi components installed on it linked up to a stock 4sp automatic transmission(for now). So no I do not have the factory computer, however I can get one for $75 out of a 87 trans am 350tpi for 75, or just the prom for $25 from www.tacreationsusa.com thanks for everyones responses and help.

    Advertisement

Last edited by dahornic; 05-03-2005 at 06:11 PM.
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 05-01-2005, 02:18 PM
malc's Avatar
Living At The Speed Of Life
 
Last photo:
Join Date: Jun 2003
Location: Espaņa Right Coast
Age: 64
Posts: 3,281
Wiki Edits: 0

Thanks: 100
Thanked 122 Times in 99 Posts
When I went to a 350 from a 305 carbed motor I called these guys
http://www.sdpc2000.com/ and they sold me the right chip and
gave me the info on what ECMs I could use. I got the ECM from a salvage yard http://www.gmsports.com/.
BTW why a poll
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 05-01-2005, 04:03 PM
docvette's Avatar
Hotrodders.com Moderator
 
Last wiki edit: Rebuild an alternator Last photo:
Join Date: Mar 2004
Location: Lafayette, california
Age: 62
Posts: 7,362
Wiki Edits: 12

Thanks: 0
Thanked 6 Times in 3 Posts
Computer

Doc here,

I'm a bit confused on what computers you have for what engines,

However, The BEST way is to marry the 350 Engine, Computer and harness into the project vehicle as a unit..

The Engine and computer are designed to run together, and then you would only have to isolate power and grounds from the car to make it play, No prom update would be required (unless your going for a performance chip...)

I'm pretty sure the Corvette Computer won't work without extensive modification, since that computer had other signal sources external to the engine, such as BCM (body control module) and I think 84 and up were VATS So I would take a pass on that one...

Get a Manual For your Body, and One from the Donor Car, sit down and draw a schematic for any differences between the new harness and your body at the computer's,
I.E.:
.....Stock body..............New Engine harness
Pin #........Color wire......Pin #.......Color wire

.....A...........Pink............A.............Bro wn
.....B...........Blue............B.............yel low
.....C...........orange........C..............blac k

And so on...Use that to graft the harness into the car..you should come out alright.

Doc
__________________
Aftermarket Solutions
Electronic & Electrical
Innovations
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 05-03-2005, 08:28 AM
edge's Avatar
Time is short, are you ready?
 
Last photo:
Join Date: Jun 2004
Location: South Carolina
Age: 45
Posts: 658
Wiki Edits: 0

Thanks: 0
Thanked 1 Time in 1 Post
I'm with Doc on the confusion. Please clarify three things -
1. Is the 350 TPI engine stock and from what make, model and year?
2. What type of transmission is in the 1986 Trans Am that will receive the 350?
3. Do you have access to the computer that the 350 came from?

If the 350 is from an 86'-89' MAF car, you do not need to change the computer or harness in your 1986 Trans Am since you are swapping a MAF TPI system, regardless of engine size; and whether or not it was a Firebird/Trans Am, Camaro or Corvette.

All 86'-89' are MAF and since they all use the #1227165 ECM and are TPI, there is no need to change the harness. You can use your 86' computer, but you need to install the MEMCAL from a vehicle that supported that 350 and was MAF. 86'-89' F-body and Corvettes use a service #1227165 ECM (computer), but the mask and binary files will be different, depending upon the year and engine/transmission combination.

The MEMCAL is the blue "chip" that can be popped out and simply reinstalled.



Give us some more information as requested above. Ed
Reply With Quote Quick reply to this message

Recent Electrical posts with photos

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Hot Rod Forum : Hotrodders Bulletin Board forums, you must first register.
Please enter your desired user name (usually not your first and last name), your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

Posting Rules
You may post new threads
You may 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 On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
2 Wheel drive to 4X4 conversion Sonny's 75 Hotrodding Basics 21 06-20-2009 09:17 AM
chevy 3/4 ton rear drum to disc conversion Rob Keller Suspension - Brakes - Steering 33 12-03-2005 04:59 PM
Disc brake conversion for a 67' mustang Pencilneck314 Suspension - Brakes - Steering 6 12-07-2003 02:24 PM
Hotrodders Knowledge Cluster: Disc Brake Conversions Jon Suspension - Brakes - Steering 0 08-29-2003 03:34 PM
Stick shift conversion kit cvc505 Transmission - Rearend 1 08-16-2002 09:43 PM


All times are GMT -6. The time now is 02:19 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
Copyright Hotrodders.com 1999 - 2012. All Rights Reserved.