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View Full Version : Chevy K1500 Blazer TBI Vortec 350 Tuning



Dom
10-11-2015, 07:14 PM
I have the VE tables just about set and runs well.

What would be next? (see data log file) Other info on my signature, not sure if it will show still new at this

Roadknee
10-11-2015, 07:40 PM
The log looks pretty good overall. Your hot idle IAC counts are in the 40's. Turn in the curb idle screw to bring them down to around 10 in park. I see some minor surge on deceleration, but if you can't feel it then leave it alone. Is there anything you're looking to improve? If not, drive and enjoy it.

Dom
10-11-2015, 10:25 PM
I might need to add EGR to pass emissions.
I am looking for more power would really like to do wheelies but I did not put that much in to it.
Reality: I thought I would be able to get a little cotton candy off the tires.

Dom
10-14-2015, 02:55 AM
The IAC counts where a easy fix. Looking at the PE timing , could this be tuned for more performance or would this be bad for longevity?

Fast355
10-14-2015, 04:39 AM
I might need to add EGR to pass emissions.
I am looking for more power would really like to do wheelies but I did not put that much in to it.
Reality: I thought I would be able to get a little cotton candy off the tires.

1.6:1 self-aligning roller rockers were worth about ~20 hp and similar torque on a carbureted HT383 tested by Hotrod magazine years ago.

Roadknee
10-14-2015, 04:41 AM
The IAC counts where a easy fix. Looking at the PE timing , could this be tuned for more performance or would this be bad for longevity?

Depends. From the history tables in your log it appears running a timing table with more advance than typical for the stock swirlport heads. I didn't see any WOT though. There's a couple timing tables for vortec 350's here.

http://www.gearhead-efi.com/Fuel-Injection/showthread.php?4967-Need-help-with-my-tuner-pro

Fast355
10-14-2015, 04:44 AM
The IAC counts where a easy fix. Looking at the PE timing , could this be tuned for more performance or would this be bad for longevity?

I am running up to 31° total timing.
Express Van
http://i243.photobucket.com/albums/ff172/Fast355_album/attachment-2_zps75x1guko.jpeg (http://s243.photobucket.com/user/Fast355_album/media/attachment-2_zps75x1guko.jpeg.html)

Suburban LT1 Cam
http://i243.photobucket.com/albums/ff172/Fast355_album/attachment-2_zpskhqldydp.jpeg (http://s243.photobucket.com/user/Fast355_album/media/attachment-2_zpskhqldydp.jpeg.html)

Dom
10-15-2015, 03:30 AM
Thanks Fast355 and Roadknee. my tables are close to what is above. so I will not press it for now . I do need help with setting up an EGR tables unless I don't have to, to pass emissions

Dom
12-06-2015, 09:48 PM
The surge that I fell seems to be down shifting.
I need to start over bad T-stat . Not up not temp