318ti.org forum

Go Back   318ti.org forum > Technical, Maintenance and Modifications > Engine Swaps

Notices

Engine Swaps Engine conversions.

.
» Recent Threads
1998 318ti
07-27-2022 05:31 PM
Last post by Platanos
Yesterday 08:13 PM
1 Replies, 151 Views
checking for cracks in...
08-03-2022 06:15 PM
Last post by far6car
08-03-2022 06:15 PM
0 Replies, 754 Views
Rear fog light question
01-23-2011 09:59 PM
Last post by ja_sam_vegan
07-30-2022 10:53 PM
7 Replies, 1,850 Views
Reply Share/Bookmark
 
Thread Tools Display Modes
Old 02-03-2022, 05:27 PM   #1
AnotherPotatoChip
Junior Member
 
Join Date: Oct 2021
Location: Seattle, WA, USA
Posts: 11
iTrader: (0)
Default 6 cyl engine swap - Tachometer fix

Hey, wanted to drop this here for future swappers...

I just completed swapping an M54B30 into my 96 ti. My ti has only 82k miles on it and is quite clean, so I wanted to retain the original instrument cluster (and the chassis miles on the odometer).

Common wisdom is that you have to change out the 4 cyl cluster for a 6 cyl cluster in order for the tach to read accurately. But there is another way...

There are several "tach signal adjusters/converters" on the market for engine swappers. These products take the engine speed signal and convert it to match your tach. For example 6 cyl engine in a car with a 4 cyl tach. I used one called "Tach-Adjust" (https://ashlocktech.com/) and recommend it based on my use (no affiliation).

This is a simple product, which needs power and ground, and is inserted in-line between the engine and the tachometer. You configure the product using dip-switches to match the swap configuration you are doing. This should work for LS swaps, JZ, BMW engine swaps (8 cyl/6 cyl), etc.

There are 3 places on the ti where you can insert this, any one of them is fine:
1) at the DME or engine where the tach signal is output (for my M54B30 this is the DME X60004 connector, pin 17)
2) at the E36 X20 connector in the engine bay (pin 20)
3) at the rear of the instrument cluster (I didn't take this route, not sure which pin)

Whichever location you pick, connect the Tach-Adjust to 12v + and -, the wire from the engine side to the input of the Tach-Adjust, and the wire to the tachometer to the output of the Tach-Adjust. Done.

This was really one of the easiest parts of the swap. Very happy to keep my original cluster and the tach reads accurately.

Caveats: I have a base model ti - no OBC, no ASC, no cruise control. So the only thing affected in my instrument cluster from the swap was the tach.

cheers
drew
__________________
Bimmers: 90 325i, 96 318ti (330ti), 02 530i
Beemers: 93 K75s, 96 K1100RS SE
Jeeps: 01 Wrangler TJ 4.0L, 19 Wrangler MOAB 3.6L

Last edited by AnotherPotatoChip; 02-11-2022 at 01:08 AM. Reason: show signature :-)
AnotherPotatoChip is offline   Reply With Quote
Old 02-04-2022, 06:58 AM   #2
b0m
Member
 
Join Date: Aug 2005
Location: Denver, CO
Posts: 90
iTrader: (0)
Default

This is super useful information. Thanks Drew!
b0m is offline   Reply With Quote
Old 02-05-2022, 06:08 AM   #3
3struck
Junior Member
 
Join Date: Jan 2013
Location: NJ
Posts: 27
iTrader: (0)
Default

That is great information!

I initially thought, wow I'd like to see a video of that. But then I realized, well the point is it would look the same.. so yeah I guess I don't need to!
__________________
Past: '90 325xi, '88 325is, 97 318ti, '06 325ix, '11 328ix, 13 X5
Present '91 325ic, 97 318ti, 99 M3
3struck is offline   Reply With Quote
Old 02-06-2022, 01:15 AM   #4
J!m
Moderator
 
J!m's Avatar
 
Join Date: Jun 2003
Location: Bouncing off the rev limiter in CT!
Posts: 3,122
Vehicles
iTrader: (1)
Default

You can also reconfigure the original cluster for four to 12 cylinders.
__________________
"Speed's just a question of money. How fast you 'wanna go?"

Order Swap Manuals Here => http://www.318ti.org/forum/showthread.php?t=12912

WolferJ- gone but not forgotten. R.I.P.
J!m is offline   Reply With Quote
Old 02-07-2022, 07:29 PM   #5
AnotherPotatoChip
Junior Member
 
Join Date: Oct 2021
Location: Seattle, WA, USA
Posts: 11
iTrader: (0)
Default

Thanks -

I really get so much great info from the forums. Not much from the social media groups at all. Would love to continue to see all good info retained in the forums - I have some other tidbits from my swap I'll write up too. And a plug here for Jim's swap guide too, that was super helpful.

Jim - what??? is there a write-up on reconfiguring an existing cluster for different engines? Is it swapping out the tach control board or something? Sure hope I didn't miss that section in the swap guide, LOL!

cheers
drew
__________________
Bimmers: 90 325i, 96 318ti (330ti), 02 530i
Beemers: 93 K75s, 96 K1100RS SE
Jeeps: 01 Wrangler TJ 4.0L, 19 Wrangler MOAB 3.6L

Last edited by AnotherPotatoChip; 02-11-2022 at 01:08 AM. Reason: show signature :-)
AnotherPotatoChip is offline   Reply With Quote
Old 02-07-2022, 08:47 PM   #6
J!m
Moderator
 
J!m's Avatar
 
Join Date: Jun 2003
Location: Bouncing off the rev limiter in CT!
Posts: 3,122
Vehicles
iTrader: (1)
Default

Just one of MANY tips and tricks in my engine swap manual. Below, an excerpt. It is not complete, as you need to get to this location within the cluster, which is detailed in the manual. But, you don't even need a computer... (and it seems the 12-cylinder cars use a different coding plug)

Test 2: Engine Data - This display is an "engine factor" value that is stored in the coding plug. The instrument cluster processor uses this factor in addition to the "TD" signal from the DME control module to process and display tachometer RPM based on the engine installed. For EXAMPLE:
*ENGINE FACTOR 2 = 4 CYLINDER
*ENGINE FACTOR 3 = 6 CYLINDER
*ENGINE FACTOR 4 = 8 CYLINDER
__________________
"Speed's just a question of money. How fast you 'wanna go?"

Order Swap Manuals Here => http://www.318ti.org/forum/showthread.php?t=12912

WolferJ- gone but not forgotten. R.I.P.
J!m is offline   Reply With Quote
Old 02-08-2022, 03:21 AM   #7
AnotherPotatoChip
Junior Member
 
Join Date: Oct 2021
Location: Seattle, WA, USA
Posts: 11
iTrader: (0)
Default

Ah, I did see that in the manual - I thought it was only for displaying the values/data for each test, and I didn't see a way to change the values. Will have to explore that a bit further!

Regardless, the above method (using something like tach-adjust) is super simple/effective. You are welcome to add it to the swap manual!
__________________
Bimmers: 90 325i, 96 318ti (330ti), 02 530i
Beemers: 93 K75s, 96 K1100RS SE
Jeeps: 01 Wrangler TJ 4.0L, 19 Wrangler MOAB 3.6L

Last edited by AnotherPotatoChip; 02-11-2022 at 01:07 AM. Reason: show signature :-)
AnotherPotatoChip is offline   Reply With Quote
Old 02-08-2022, 11:28 AM   #8
J!m
Moderator
 
J!m's Avatar
 
Join Date: Jun 2003
Location: Bouncing off the rev limiter in CT!
Posts: 3,122
Vehicles
iTrader: (1)
Default

Okay, I’ll look into that but I prefer to keep things factory as you know.
__________________
"Speed's just a question of money. How fast you 'wanna go?"

Order Swap Manuals Here => http://www.318ti.org/forum/showthread.php?t=12912

WolferJ- gone but not forgotten. R.I.P.
J!m is offline   Reply With Quote
Reply

Bookmarks


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

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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
once again 99 auto 318ti s52 swap 5speed /shaved engine bay 318_mzk2 Engine Swaps 15 01-29-2014 01:56 AM
Misc parts M44 engine, auto trans, diff, driveline, radiator, 124k miles, swap time:) raamaudio Parting out & Parts (US) 4 01-07-2014 11:04 PM
F.S. BMW M42 (M42B18) engine fits e36 318, 318i,318is, 318ti chrisbec eBay and Craig's list listings 6 11-03-2010 02:21 PM
CA COMPLETE 2.5 OBD1 5 Speed SWAP LOOK JDEE_HELLROTi US and North America 1 06-22-2010 04:33 PM
M3 3.2l engine swap OBD-II J!m Engine Swaps 51 11-06-2003 01:30 AM


All times are GMT +1. The time now is 12:18 PM.


.
Powered by site supporters
vBulletin Version 3.8.8
Copyright ©2000 - 2022, Jelsoft Enterprises Ltd.
Copyright ©1999 - 2022, 318ti.org
© vBadvanced CMPS v3.2.2
[page compression: 91.11 k/107.31 k (15.09%)]

318ti.org does not warrant or assume any legal liability or responsibility for the accuracy, completeness, or usefulness of any information or products discussed.