Sourmug's 3.4 DOHC Swap (Page 15/28)
elitopr SEP 28, 09:44 PM
I can't wait get start my 3.4 DOHC swap!!!!!!!1
Carswell...Wellscar OCT 01, 12:16 PM
Awesome swap!! Looks great!! i wanted to do this swap but then changed my mind! I still have the engine if anyone is looking for one or one for parts! ..sorry dont mean to hi jack!

How does it sound???
War Hammer NOV 06, 10:01 AM
Looks great
Sourmug NOV 07, 05:07 PM

quote
Originally posted by War Hammer:

Looks great



Thanks!
FieroAK NOV 07, 05:23 PM
I love your car. Haha. Very nicely done.
Sourmug NOV 07, 05:24 PM
There's one minor issue that I have been haveing that has now been resolved. In order for the new VDO tack to read the RPM signal from the ECM Joe has to install a Dakota Digital SGI-8 unit to convert the signal. Here's a link to the unit: http://www.dakotadigital.co...mode=prod/prd127.htm

What I was finding was that the tack worked perfectly well up intil 5300 RPM. Anything over that and it would drop to Zero until the RPM dropped below the 5300 threshold. I tried all the claibration steps outlined in the instructions and went though all the connections but couldn't find the cause. I sent the unit back to Joe at his request and he tested the unit on his 3.4 DOHC car with a spare VDO tach that he has and he had the same problem.

Joe contacted Dakota and it turned out that because there are only 3 coil packs the SGI unit had to be set for 3 cylinders not 6. Joe retested it and confrimed it operates correctly and it's on its way back to me. Just a heads up for anyone else who is going to use one of these modules as this isn't defined in the instructions.

Nolan
ricreatr NOV 07, 08:02 PM

quote
Originally posted by Sourmug:

And the Dyno slip:


Nolan



it the tach issue what kept you from running up to 7k?

first time i have seen the mirrors. they look sharp.
Sourmug NOV 07, 09:57 PM
No, not at all, they don't use the vehicle tach on the dyno in any event.

Nolan
BV MotorSports DEC 24, 09:07 PM
Can you give me some more information on the tach? Use a 95 Monte Carlo "8k" tach and a DakotaDigital controller needs to be used? I am curous why the 3.4's ecu wont control it.

Great swap BTW, excellent workmanship!
Sourmug DEC 26, 12:24 AM
The tach being used is a VDO tach, not a GM tach. According to the VDO literature it's supposed to work with the stock signal from the 3.4 DOHC ecm however, it won't work. The SGI unit adapts the signal and the VDO tach works fine with it. I didn't actually do the work Je (aka Fieroking) did the work. If you need more detailed information you would have to contact Joe.

Yes he did a great job.

Thanks
Nolan

[This message has been edited by Sourmug (edited 12-26-2011).]