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Old 05-22-2019, 03:11 PM   #791
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Location: Eustis FLORIDA
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Year: 1999
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Chassis: Freighliner FS65
Engine: Cat 3126
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Originally Posted by cadillackid View Post
you dont need to use a new chip to run closed loop .. they go into closed loop at 160f so a 180 T stat will be fine. , O2 sensor and you may need a resistor to fool the EGR's 3rd pin if it has a 3 pin connector.



these ECMs i didnt think were flashable.. for these i always burned E-prom's with new timing and fuel tables.. I used to download the hex files and edit them.. wow i wonder if i still have all the stuff i used to hack these... I know I still have my Burner and I think the VB6 program I wrote.. "yep back in the 90s I was building laptops into digital Dashes for hotrods... talking at a Whopping 160 Baud to the ALDL port of the ECM..."
-Christopher
From my googling it seems the egr doesn't do too much and if I send off the chip or whatever they'll delete the egr part of the programming.
Its either running too rich or has a leaky injector. Its a PITA to start on a really REALLY hot day.
Have you ever changed out the cam on one of these? Seems that and the heads are the real limiting factors for making power and running efficiently.
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Old 05-22-2019, 04:12 PM   #792
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Join Date: May 2009
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Year: 1991
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ive built small block 350;s from the ground up.. some were mild, some were wild..

you can make it high performance if you want.. the stock bottom end takes a decent amount.. heads cam intake is the standard affair for small block chevy to get you feeling the juice.. first in order is to get yours running correctly.. and yeah EGR delete is a nice mod.. EGR can help with detonation as it helps to cool the cylinders.. that said I built the engine, timed it, fueled it, and aired it correctly so i didnt need EGR to keep detonation in check..





what year is that again?


on the 87-up blocks the cams are factory roller and require a Biull-nose camshaft vs the standard on pre-87 blocks..



the sluggishness is often the computer in open loop mode..
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Old 05-22-2019, 04:39 PM   #793
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Join Date: Sep 2014
Location: Eustis FLORIDA
Posts: 17,996
Year: 1999
Coachwork: Thomas
Chassis: Freighliner FS65
Engine: Cat 3126
Rated Cap: 15
Quote:
Originally Posted by cadillackid View Post
ive built small block 350;s from the ground up.. some were mild, some were wild..

you can make it high performance if you want.. the stock bottom end takes a decent amount.. heads cam intake is the standard affair for small block chevy to get you feeling the juice.. first in order is to get yours running correctly.. and yeah EGR delete is a nice mod.. EGR can help with detonation as it helps to cool the cylinders.. that said I built the engine, timed it, fueled it, and aired it correctly so i didnt need EGR to keep detonation in check..





what year is that again?


on the 87-up blocks the cams are factory roller and require a Biull-nose camshaft vs the standard on pre-87 blocks..



the sluggishness is often the computer in open loop mode..
Its an 87. Its supposed to be a flat tappet non-roller but its drilled and all that for a roller cam. Just the trucks didn't get roller cams. Even up till 95 they were flat tappet. Since the engine only has 4k miles I want to keep the mods as mild and bolt on as possible. I'll be looking for a "computer friendly" flat tappet cam. Something good from around 1000 rpm up to maybe 5000.
Looking into vortec heads vs aftermarket tbi type heads.
As you've said- I plan to get it running and tuned correctly, then do a few mods as time and money permit.
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