6.2 swap thread

[ls1frc]

Liking the 6.2 a lot so far.

Only thing that I don't is just the poor fuel economy, but if I look up EPA estimates for a L92, which is essentially what I have now with DOD gone, it's about what I am getting. About 12/18 is a stock L92, I'm getting around 10.5/16.5. It is 25 degrees out, so I am sure this will improve in spring.

I don't drive very far, so it's not a huge deal. Mostly truck is used on a 3 mile drive to drop my son off, then back home and parked.

 

[mikeyss]

Liking the 6.2 a lot so far.

Only thing that I don't is just the poor fuel economy, but if I look up EPA estimates for a L92, which is essentially what I have now with DOD gone, it's about what I am getting. About 12/18 is a stock L92, I'm getting around 10.5/16.5. It is 25 degrees out, so I am sure this will improve in spring.

I don't drive very far, so it's not a huge deal. Mostly truck is used on a 3 mile drive to drop my son off, then back home and parked.

Your mileage seems a little off to me because my L9H got the same mileage on E85 before it blew up. Even my 06 Sierra Denali LQ9 with AWD I'm seeing an avg of 16mpg mixed city and highway driving. Of course, thinking about it...... I'm sure you're having a lot of fun with your 6.2, those romps on the gas pedal will definitely cut your MPG's down, lol

 

[PatDTN]

The computer in my Tahoe tells me I'm getting better economy. I probably need to get it adjusted for the injectors on the 6.2.

 

[ls1frc]

Im going based off DIC which could be wrong. But injector data is right, its updated from a 2012 l94 stock tune.

Ill do a hand calculation

 

[1BADI5]

Liking the 6.2 a lot so far.

Only thing that I don't is just the poor fuel economy, but if I look up EPA estimates for a L92, which is essentially what I have now with DOD gone, it's about what I am getting. About 12/18 is a stock L92, I'm getting around 10.5/16.5. It is 25 degrees out, so I am sure this will improve in spring.

I don't drive very far, so it's not a huge deal. Mostly truck is used on a 3 mile drive to drop my son off, then back home and parked.

Also, keep in mind its that time of the year where we get that winter blend gas. I normally see/take a 2-3mpg hit with it. Once, I switch over to E85 full time it will not matter

 

[ls1frc]

Also, keep in mind its that time of the year where we get that winter blend gas. I normally see/take a 2-3mpg hit with it. Once, I switch over to E85 full time it will not matter

True, I didn't drive the 5.3 in this frozen weather yet post DOD delete to compare.

I'll continue tuning it. If it's still pretty bad, I will run a pseudo lean cruise tune

 

[1BADI5]

I have been running 93 since last fall and I can see a noticable difference in the mpgs, while still maintaining the same driving style.

 

[ls1frc]

I think im good. My regular run to the stores, about 10 miles mixed driving, netted about what I got from the cammed 5.3. It def burns more if you get on it. And my idle is burning a lot more, im gonna clean that up by disabling 02s at idle. Dfco is enabling a lot more and that also made a good difference.

 

[donjetman]

1. We do mostly hwy driving. She gets 15.5 mpg on 87 octane,
2. 16.5 on 89,
3. and 17.5 on 93 octane.

 

[ls1frc]

Got a couple minor issues going on.

Smelling coolant from my upper rad hose connection area. It was smelling before I did the swap, I hope it's not a cracked radiator. It's a mishimoto I bought last year. I added constant tension clamps, but still smell it.

My rear washer fluid stopped pumping.

 

[PatDTN]

I hooked one of the heater hoses pulling my engine and likely have a tiny crack in one of the plastic Ts. I'll replace that when my new water pump gets here and I'm going to lose a bunch of coolant anyway.

 

[ls1frc]

My t connectors were already replaced and I pulled them off before I pulled engine, it's not those. I can smell it very clearly by the top radiator hose at the radiator connection. So either the hose is slightly leaking or there is a hairline crack.

 

[ls1frc]

Rear wiper fluid issue was just the crappy chinese replacement wiper arm. The line already split after 3 months.

 

[ls1frc]

Did my 3rd oil change since new engine went in.

First change, I get up to 210 coolant temp then drain.
2nd change, did about 200 miles.

First two changes were mobil 5000 basic oil. I have been getting a lifter clacking on cold start, just for a second or two then they quiet right down. It's def bleeding down or there is air inside still. I read this can occur for up to 500 miles.

Just in case, I bought some higher quality oil, Mobil 1 0W-40. I also double checked my pushrod length and it came back again at .040" preload, which is what they recommend at Johnson.

I'll see if the better oil cures the cold startup noise. I'm gonna run this oil a normal interval.

 

[iamdub]

Did my 3rd oil change since new engine went in.

First change, I get up to 210 coolant temp then drain.
2nd change, did about 200 miles.

First two changes were mobil 5000 basic oil. I have been getting a lifter clacking on cold start, just for a second or two then they quiet right down. It's def bleeding down or there is air inside still. I read this can occur for up to 500 miles.

Just in case, I bought some higher quality oil, Mobil 1 0W-40. I also double checked my pushrod length and it came back again at .040" preload, which is what they recommend at Johnson.

I'll see if the better oil cures the cold startup noise. I'm gonna run this oil a normal interval.

What filter? Maybe a faulty ADBV?

 

[ls1frc]

I just use the A/C delco ones. I've read about this problem with Johnson lifters on cold startup.

First guy put in longer pushrods, fixed it.
Other guy changed his oil and that fixed it.

I did the oil first. If that doesn't work, I have .025" longer pushrods already in my garage. I'm not too concerned, engine is very quiet once warm.

 

[ls1frc]

So evidently there isn't a stocked version of the IAT breakout harness for our Maf pigtail. Casper is going to custom make me one

I am going to do this + a real flex fuel sensor to maximize the setup. See if I can get into the low 5's on the 0-60. I don't think 4's will be possible without a real stall, which I ain't doing lol.

 

[FrankU]

Plug & Play FF unit :

https://dsxtuning.com/collections/f...-2006-2009-trailblazer-ss?variant=55854380235

 

[randeez]

https://www.ictbillet.com/wire-breakout-harness-ls-gen-4-maf-mass-air-iat-intake-air-sensor-ls3.html

 

[ls1frc]

Plug & Play FF unit :

https://dsxtuning.com/collections/f...-2006-2009-trailblazer-ss?variant=55854380235

Yup, I am a dealer for these so I will buy at cost.

https://www.ictbillet.com/wire-breakout-harness-ls-gen-4-maf-mass-air-iat-intake-air-sensor-ls3.html

I actually ordered this, the pigtail is not correct. The truck pigtail is different. I called Casper just now and they custom made me one for $10 cheaper than this even after shipping.