New to TBI Tuning SBC 327 TBI

[kidsandjeep]

Hello All,

Hoping for some advice, I have a SBC 327 TBI'ed motor and it runs good, idles a bit high and the timing may need some help Currently a stock 1227747 ASDU ECM. The motor is in my 1951 Modified M38 (CJ3A) flat fender and it runs all over Moab in the heat but living in Colorado Springs when I run it up old Stage Rd, on some steep climbs up the mountain she overheats really bad, not sure if it is the the climbing, the drastic change in altitude, timing or the engine bay holding too much heat. I did add hood louvers and the engine doesn't overheat normal driving. I would like to try some different tunes in the ECM. I have the larger PIN Flash Proms and the Moates G2 adapter as well as a stock ECM once I get the tune right. Any "Bins" you all would suggest trying. Hope I got all that right, as I said totally new to tuning. I did delete the EGR on my TBI unit but as I said no other tuning changes.

Thanks all!

--Scott

[kidsandjeep]

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[MO LS Noobie]

Have you added any electric fans to get air flow across radiator at rock crawling speeds? I do OBDII stuff, but there are some basic physics that apply.

[In-Tech]

Hiya,
This might help as a starting file :)

[kidsandjeep]

Thank you! I have a buddy helping me this week with soldering the chip parts from moates. Then I will see about programming chips. I have been reading here quite a bit about that process.

[kidsandjeep]

Hi, yes, I have an electric fan. Purchased with the most CFM I could get given the room I had. I should have pushed the motor further into the firewall but I didn't.

[MO LS Noobie]

I have a customer with a 383 SBC in a 80s model CJ. Had to try several different fans to get proper airflow. Worst-case scenario you could fog the front of the radiator with a water mist if you're only having problems at a certain point in the trail.

[kidsandjeep]

Thanks MO LS Noobie, that is a good tip on fogging the radiator, the steep climbs and rapid altitude change seem to be the biggest issue. I drove it last year all over Moab in July and never overheated or saw engine temps above 200. I stop before I boil over on Old Stage (last run I forgot my IR Temp Gauge so I couldn't check actual temp but gauge hit 245) and usually wait a few minutes to cool down then climb some more, repeat. I can try the misting next time if tuning doesn't work I am also going to raise the rear of my engine hood slightly to maybe remove trapped heat. I have hood louvers but maybe not enough. I can try different fans too but need a very thin fan due to space issues between the radiator and water pump. I would take a recommendation on a real good electric fan if anyone has one.