Getting ready to turbo my 6.2L!

[1FaastC10]

Originally Posted by 78ChevySilverado

Hey Arveetek. Did that engine cover come off a Nintendo?

uh, no, stock 6.5 TD engine cover

[apstguy]

This is a very cool project. You didn't go the easy way and buy a kit for mega bucks, you did it yourself. Congrats! Awesome job!

[Tom]

Originally Posted by 1FaastC10

uh, no, stock 6.5 TD engine cover

It was a joke. Same color and texture look as the original nintendo

[78ChevySilverado]

Originally Posted by Tom

It was a joke. Same color and texture look as the original nintendo

I'm glad someone got it. I thought we were all old enough to understand.

Good job on the turbo man. No hard feelings??

[grape]

now I see why you had to beat the inner fender well, that's an on-center exhaust housing. Banks uses a Tangential style. What A/R is the exhaust....it looks like .96?

Hey Casey, If I email you some pictures can you host them for me, I want you to see what I built after selling my complete Banks kit.

[arveetek]

Thanks for all the great compliments, guys! I really appreciate it.

Grape,

Yep, it's a .96 exhaust A/R.

Actually, I don't have any place to host the pics either. I just use the free webshots account that you could sign up for as well, if you want to. You can also post pics directly from your computer into this bulletin board. When you make a reply, don't use the quick reply at the bottom, but use the regular advanced reply. At the bottom of that screen, you will see a button to allow you to attach a file to this thread. Just use that and post the pics directly into this board. I'd love to see them!

Casey

[1FaastC10]

ok, maybe i'm stupid here, but what is A/R?

[Tx Firefighter]

aspect ratio

[grape]

my intercooler and new radiator for my 82 turbo'd 6.5 blazer

[bigblock73]

Casey, good job on the upgrade...I am very impressed!

[grape]

all during my Banks ownership, this is what I was planning.........

[arveetek]

Sheesh, grape! That's the thickest core radiator I've ever seen? Is that a PowerStroke intercooler, or custom made? I'm assuming you had to do away with the stock engine-driven fan for that setup.

I see you have a 6.5L turbo system. What turbo you using?

Casey

[grape]

yes, it is a powerstroke intercooler and after some cutting it fits flush under the core support so the radiator is in the stock location. my radiator however is a tad deep for any mechanical fan. I don't tow with this truck and it didn't have a fan on it for over 2-1/2 years, so I'm going with some form of electric, with that sized radiator i don't think it will be a problem. Those radiators are $1200-$1500 from C&R brand new, or from www.musclemotorsports.com they are $175 with heat exchanger pressure checked, gotta love over funded winston cup teams.

[C&C Chevy]

That looks sweet! Sounds very cool too. Need to get some track times.

[87Silvy]

Originally Posted by C&C Chevy

That looks sweet! Sounds very cool too. Need to get some track times.

I agree. I would love to see the face of one of those ricer-burner drivers when you smoke them down the track.

[1FaastC10]

ok, aspect ratio of what?

[grape]

A/R is the area to radius measurment. It is the way turbo housings are sized.

[arveetek]

6-29-04 Update:

I replaced the plastic pressure pipe that goes from the turbo to the manifold with a steel pipe. I think I've got all the bugs worked out now! (I burned a hole in one of the rubber elbows I was using...decided that wasn't going to work!) I've added new pics of the pressure system, and here's one of 'em (at bottom of post)!

All the pics showing my progress can be seen here:

http://community.webshots.com/album/153303040IeQyIu

13 psi still seems to be my top boost, which is fine by me. Anything over that would scare me...I'm not sure how much boost my 6.2L can take!

In order to reach that much boost, I'm running at full throttle at near governed engine rpm. Most of the time the boost runs around 10-11 psi under near full throttle.

The highest EGT I've managed to hit is 975 degrees. It will actually go higher than that in overdrive when boost is low, but not when under full throttle. That means I've got more playing to do with the injection pump.

I find it extremely interesting at how the turbo affects EGT's. Before the turbo, I turned up the pump 1/4 turn and was hitting 1300 to 1400 degrees all the time. After the turbo, and with no adjustments to the injection pump, I see 900 tp 975 as max. temps, with cruising temps around 500 to 700.

When cruising in overdrive, the boost is low and the EGT's are higher. Push the throttle down and give it a little more fuel, and the truck jumps into third, the rpms and boost climbs up, and the EGT's actually drop! That just goes to show how much difference a turbo alone can make in EGTs.

Also, although I can't see the tailpipe that well in my mirror, I don't think I'm smoking hardly at all now, whereas before I could leave a smoke screen. I'm burning all my fuel now. Just another indication to the need of IP tweaking!

Casey

[1FaastC10]

casey, please, stop. you're going to make my already-over- budget truck even less budget friendly! have you noticed a difference in milage at all? if so, is it a gain or a loss?

[arveetek]

Well, I've only filled up once since the turbo install. That tank produced 16.5 mpg, down from 19. But, I spent most of that tank with my foot buried to the floor! It will probably be a while until I get an accurate mpg reading. We're headed to Colorado next week with the RV in tow, so it will have to wait until we get back to get a true reading, unloaded that is.

[Beefcake]

Im wondering how long that 6.2 lower end can handle all that power......

[8t5Silverado]

Very cool.

I would still look into a wastegate. They are cheap and easy to make from parts you can find at Home Depot. I have found a lot of information regarding homemade wastegates on www.nasioc.com. Just do a search.

[arveetek]

I've put several thousand miles on the engine since I posted last, including an 1800 mile trip to Colorado and back. No problems whatsoever with the engine or turbo. Pulling hard all day long with the foot to the floor at 65 mph towing a 29' fifth-wheel produced around 10-11 psi at 1050 degrees on the pyro. Max. boost at max. engine rpm was 14 psi. Max egts I ever saw was 1100.

A wastegate probably wouldn't help me any without swapping turbos....I don't build enough low-rpm boost to warrant it.

I'm not worried about the bottom end. I've got an 82 block, supposed to be the strongest block GM ever made. Plus, there's no difference in the bottom ends between the 6.2L and the factory-made turbo'ed 6.5L's, at least not until they introduced oil-spraying piston jets a few years ago.

I think I'm going to turn up the injection pump some more. Towing hard at full throttle produces max. EGT's of 1100 degrees, but I can barely get over 950 degrees without a trailer behind me. I've got some room to burn more fuel which means = more power!

Casey

[Prerunner1982]

awesome deal casey, where in CO did you go?

[arveetek]

We went to Canon City and visited the Royal Gorge, then we went to Colorado Springs, toured the Garden of the Gods, Pike's Peak, and some other local attractions. It was quite fun.

Here's a pic of my truck at the top of Pike's Peak.

I said that I didn't have any problems with the turbo, but I forgot about a blown turbo hose coupling, but that was easily repaired on the first day out, and I didn't have anymore troubles after that.

Casey