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to chip or not to chip?

Ive put my wastegate actuator directly to vac pump, it works pretty nicely since it will vary the wastegate with RPMs and fuel. I was seeing like 16psi accelerating off of that but it was too high for economy cruising at 75MPH (like 7psi).

I threw no codes when bypassing the boost solenoid. The solenoid does not have a sensor. only the S engines have vac sensor programming to throw EGR codes, and a vac line going to the EGR/BARO sensor.

Using an aftermaket chip meant to use the vac system it works much better, the wastegate duty cycles are better. So with everything hooked up stock and the Engh Chip I get like 13-14psi boost, 10psi sustained easily. 3-5psi cruising 65-75MPH. Also better because fuel rates might be higher.
 
I don't see it better for the mere reason that my EGT's dropped so much mechanically.

Lower temps = healthier, longer lasting engine imo
 
I'm looking forward to no wastegate too, and not having the vac pump is a plus. All my numbers are from a GM4 too, so I'd like to be rid of it soon.
 
JiFaire said:
You'll love it, Matt... makes it like a new truck. I couldn't believe how I had ever gotten used to driving it stock.
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Ahhhhh.... Music to my ears. :D

I called Bill Heath last week to discuss the difference between the two 'GL' chips. My truck is fairly heavy (6500# and I plan on installing a transfer tank and a hydraulic liftgate - another 1,000# or so), and I figured the GLE was the way to go. After spending time talking to Bill, and answering his questions about what mods I'd done and how I drive/tow/haul, he recommended the GL4. I was kinda surprised, but his logic made sense, so that's what I went with. Now, I'm counting the days til it arrives.

I use the truck as a daily driver - 30 miles each way, primarily on FM two-lane roads. Average speed is around 65-70, and the last couple of miles is city driving thru Tyler to get to the college campus on the other side of town. Then once a month, I make a trip to OKC to check on mom & dad. That's around 750 miles round trip, including putting around town on errands. So far, my average hiway milage is around 16 - 16.5mpg. Around town is closer to 14.5 - 15. Be really interesting to see the differences in accelleration and mileage. Like I said, I'm counting the days!
 
I found that when I drove mine the same as before, my mileage actually went up.

However, that was after the fun wore off...being able to smoke people off the lights... :)
 
Increase in mileage? Pulling my 30' 5er, I went from around 11-12 to 12-14, 60mph fairly flat ground, no significant headwinds.

Increase in power? Night and day. Pulling into Ellensbury, climbing out of the Columbia River valley, there's a 6.5 degree hill about 6 miles long. I came up it at 30 mph in 2nd, worrying about overheating all the way, fot passed by everything on the road including a converted school bus pulling a Uhaul.

On the way out of Ellensburg after putting in a Maxetork, turbomaster, new thermostat and fan clutch, I went south on 97 to Yakima. There's a 7.5 degree hill about 8 miles long. I went up it at 55 mph, passed a dodge pulling a horse trailer and a semi on the way up.

I phoned Bill from Yakima just to tell him how happy I was. Night and Day.
 
Anybody want to spot me 500 bucks for a reflash by Heath? Oh the damage I could cause with that thing. I already beat people off the line in short bursts(thanks you 4.10's!), I can only imagine the capabillities after that. Especially If I'm going to be towing.
 
JiFaire said:
.. (I know you said you had 4", but make sure your downpipe - off the turbo - is at least 3" and that it is mandrel-bent - nice round corners, not squashed up as the stock ones always are in 95 trucks) and make sure your turbo is running enough boost. ..

I also highly recommend Heath chip (GL4) and Turbomaster (www.heathdiesel.com), but as pointed out, Stefan at ENGHmotors might be a cheaper alternative for you over there.
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The downpipe is 3" and mandrel bent, crossover pipe is also mandrel bent so I reckon that has been swapped as well. Just ordered myself a bully dog pyrometer, so I reckon I'm ready for a chip :D
 
Chip is in place :smile5:
60 hp chip from Engh motors, works fine and EGT's are if anything better than before. At least in the top range. Not a revolutionary effect increase as the truck had some major modifications from before, but it runs good ):h

Just need new shocks, and a muffler as I'm getting fed up with comments about the "noise" :rolleyes5: Well, at least the ice is breaking on the river and the RIBs the army uses as patrol boats along the Russian border will soon be back on the water. They have marine 6.5td with straight exhaust, so hopefully people will forget about me for some time.. :D Canadian-built challengers, I think. Cool boats, with water-jet and 270 hp.
 
Yup, it peaks at 12 psi now. Not sure if I should/could increase that a bit. Was running stock settings before.
 
Check your specs to make sure your boost setting is correct for the Engh chip.

When I installed my Heath GL4 last month, Bill was very specific about boost pressure. I had my manual boost controller set too low. (I had just installed the chip and was still 'adjusting'.) When I got the boost set where Bill wanted it, I noticed a definite difference in how the truck responded. No more smoke/haze, much stronger pulling thru a longer RPM range, and the fuel economy continued to improve. So, double check.
 
bucholzi said:
Chip is in place :smile5:
60 hp chip from Engh motors, works fine and EGT's are if anything better than before. At least in the top range. Not a revolutionary effect increase as the truck had some major modifications from before, but it runs good ):h

Just need new shocks, and a muffler as I'm getting fed up with comments about the "noise" :rolleyes5: Well, at least the ice is breaking on the river and the RIBs the army uses as patrol boats along the Russian border will soon be back on the water. They have marine 6.5td with straight exhaust, so hopefully people will forget about me for some time.. :D Canadian-built challengers, I think. Cool boats, with water-jet and 270 hp.
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Dang, that's where they all went! Sold them to you guys! ):h

Haha, at least the military has a nice ride.

Don't throw a full out muffler on there. It will contribute to lost mileage and possibly power. Get a nice free flow setup that will take away some of the roar, but still leave you with a nice sounding rig.
 
buddy said:
With my Engh chip I get 17psi boost out of the vacuum setup. Got some mad IATs at that, but I would set your TM to at least 15psi.
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Ok, I adjusted the TM to max 17 psi. The EGT was a bit high with 13 psi, especially with a trailer even though it only weighed around 900 lbs. Not sure how much of boost I can "safely" run? 17 sounds like alot..

It runs pretty sweet now and I really like the way it acts and feels (with the tranny shifts and everything..), just hope you guys are correct, and that the engine will hold up as long as I respect the EGT, and in general don't act like a jackass :thumbsup:
 
Respect the max EGTs (1200*) and ECTs (210*) and all will be fine.

I would set it so that at normal conditions, normal hard accel and normal hard pull you get max of 15psi. I only see 17psi when I'm trying to set land speed records, not really but when Im at 90mph heading to 110. When I hit steep hills I'll see 15psi boost and then sustained boost on hill climbs is 13psi for up to a few minutes and I havent had any issues, and thats in OD with torque converter locked doing 2000-2200RPM. I'll get maybe 900* EGT on turbo downpipe, so around 1000* pre turbo, and my ECTs never move from 190*.

The highest I have seen my IATs was 245*, and thats at 16-17psi boost at 110MPH.

So 15psi is pretty well known to be a safe limit on these engines, and others have run more.
 
17 is absolutely max, and I have to work it hard to get it that high. I reckon it usually peaks at 15 (the gauge is in bar, so I need to think back and do a bit of conversion), it needs to upshift and accellerate a bit at WOT to reach 17. Haven't driven it enough to get a proper idea of EGT, but it seems to have improved.
 
bucholzi said:
17 is absolutely max, and I have to work it hard to get it that high. I reckon it usually peaks at 15 (the gauge is in bar, so I need to think back and do a bit of conversion), it needs to upshift and accellerate a bit at WOT to reach 17. Haven't driven it enough to get a proper idea of EGT, but it seems to have improved.
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You should perhaps double check that boost guage with a scanner if your running so much boost. I have heard stories about gauges being 2-3psi off, hate for that to be 20psi instead of 17.
 
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