just another ls1 s10 blazer swap... with a turbo - Yellow Bullet Forums

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Old 05-09-2012, 11:00 AM   #1
BigRicky3
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Default just another ls1 s10 blazer swap... with a turbo

Hey folks, I just signed up to show off what Iíve been working on.

This is my 1996 Blazer Iíve had since high school. It popped a head gasket in the 4.3 a few years back, and things got a bit out of hand when I went to fix it.

Here are the drive train specs:
2003 5.3 Tahoe short block (60k miles)
used LS6 cam/ new AC Delco lifters
Trickflow pushrods
LS1 heads/ Trickflow springs and some mild bowl work
LS1 intake (filled egr & painted w/ Duplicolor wheel paint)
SLP oil pump
Trickflow timing chain
H2 (ďstreet rodĒ) oil pan from Pace Parts
Current Performance motor mounts
Escalade water pump
Misc. ARP fasteners (rods, heads, intake)

Nothing special or exotic (most of it is used crap that other people didnít want or need). Iím hoping the turbo & boost will compensate for not having a bunch of aftermarket stuff, and Iíve seen that proven on here a few times over.

I had the blazer 4L60E rebuilt by a local trans guru. He put in a Sonax sun gear, extra clutches, shift kit, and only he knows what else. He also sold me on a new stock 700R4 torque converter out of an 80's Z28. With this combination, it should stall around 2200-2400, and work well with the LS6 cam & 3.73 gears. I bolted it to the engine with an Advance Adaptors kit, #712500A.

The rear is going to be a narrowed 8.8 from an exploder with Moser axles & stock 3.73 gears, and caltracs.

Now on with some pictures:






And after some elbow grease & cash:



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Old 05-09-2012, 03:36 PM   #2
sandmann120
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Default Re: just another ls1 s10 blazer swap... with a turbo

What are you going to do for headers?
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Old 05-09-2012, 04:22 PM   #3
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Default Re: just another ls1 s10 blazer swap... with a turbo

Here's some more pictures.

Custom stainless coil covers:





Here's a bracket I designed, and had a friend water jet. The big slots are so I can clock the compressor housing almost 360*. It's still in mock up stage, I'll end up painting it or polishing it.









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Old 05-09-2012, 04:26 PM   #4
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Default Re: just another ls1 s10 blazer swap... with a turbo

Quote:
Originally Posted by sandmann120 View Post
What are you going to do for headers?
I'm going to use a modified 98 camaro manifold on the right side, and something along these lines for the drives side:



I made this up in SW to figure out proportions, and a material list. The final result is going to look a little different.
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Old 05-10-2012, 01:35 PM   #5
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Default Re: just another ls1 s10 blazer swap... with a turbo

I hope that little 90* isn't your wastegate position, that won't work very well. Also, why did you choose to mount the turbo the way you did? Why not mount by the flange on the exhaust housing?
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Old 05-10-2012, 02:00 PM   #6
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Default Re: just another ls1 s10 blazer swap... with a turbo

Quote:
Originally Posted by fenton06 View Post
I hope that little 90* isn't your wastegate position, that won't work very well. Also, why did you choose to mount the turbo the way you did? Why not mount by the flange on the exhaust housing?
Youíre not the first one to mention my thought on the waste gate placement. Could you (or anyone) please elaborate with a reason? Suggestions? Where did you put yours? Thanks in advance for the edumacation.
As far as the bracket goes, I wanted to have more support for the heavy turbo than just the log manifold. The pictures donít really show well, but there arenít any real strong place to mount the flange to the engine block, and not have a very cumbersome bracket. The placement also makes it super easy to clock the turbine flange, and dial in where the pipe is routing. I donít have much room to spareÖ
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Old 05-10-2012, 09:34 PM   #7
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Default Re: just another ls1 s10 blazer swap... with a turbo

in your drawing i would rotate it around to the front of that manifold so it gets direct exhaust flow into it. with it to the side of the exhaust flow it may not control the boost too well bc the exhaust will bypass that port.
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Old 05-11-2012, 08:48 AM   #8
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Default Re: just another ls1 s10 blazer swap... with a turbo

Version 2.0.

Critique at willÖ



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Old 05-11-2012, 05:29 PM   #9
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Default Re: just another ls1 s10 blazer swap... with a turbo

my buddy has a 6.0 h/c/nitrous blazer that was done on the cheap. thing is pretty serious for the money invested. i always loved blazers for the way they leave.

i got some video of it a while back on motor. ran a 7.0 and he's still working out the tune and some gremlins on the bottle.

http://www.youtube.com/watch?v=Pko8TzWSdkg

hope that motivates you.
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Old 05-11-2012, 06:30 PM   #10
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Default Re: just another ls1 s10 blazer swap... with a turbo

Your wastegate angle is still no good. Imagine your exhaust as water flow and you want it to flow very easily into the wastegate. Your tube is at 90į to they direction of flow. I would move the wastegate tube down into that radius so the wastegate is more inline with the main log of the manifold. Basically imagine your log continued straight and place the opening for the wastegate there
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Old 05-11-2012, 08:12 PM   #11
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Default Re: just another ls1 s10 blazer swap... with a turbo

Much better. You're still going to have the #1 cylinder blowing into the turbine unregulated, but it might still work ok. Just like said above, move that wastegate flange down on the log until it makes a smooth merge, and you'll be much better off.
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Old 05-11-2012, 08:21 PM   #12
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Default Re: just another ls1 s10 blazer swap... with a turbo

Quote:
Originally Posted by brian_rs/ss View Post
my buddy has a 6.0 h/c/nitrous blazer that was done on the cheap. thing is pretty serious for the money invested. i always loved blazers for the way they leave.

i got some video of it a while back on motor. ran a 7.0 and he's still working out the tune and some gremlins on the bottle.

http://www.youtube.com/watch?v=Pko8TzWSdkg

hope that motivates you.
That's sweet, what's he hot for gears & trans? Is he leaving off the footbrake, or transbrake?

Thanks for the help with the manifold design, guys. Its a nice luxury to build it all electronically before striking an arc.

Any more input is welcome.


Also, further "motivation" may be contributed via paypal
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Old 05-14-2012, 08:45 AM   #13
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Default Re: just another ls1 s10 blazer swap... with a turbo

I understand now what youíre saying about moving it down, to have a more strait shot (and about the flow into the wastegate in general). It may end up being that way, but, I think it would interfere with the power steering pump if put there.

I do think this will clear (and provide some regulation for cylinder one):






New can of worms....

Where to put the Left & right bank O2 sensors? I see the "kits" have them in the back of manifolds (close to where they would be from the factory). I donít think I like that, as they would both be reading (in my case) the right bank, and not the left. I'm thinking back of the manifold on the right bank, and the front of the manifold on the left bank.


Any thoughts?


I am putting a wideband in the down pipe.

I am also running a factory "old" computor, from around 2002
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Old 05-14-2012, 08:34 PM   #14
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Default Re: just another ls1 s10 blazer swap... with a turbo

That's much better I would still try to to more of a radius into the main log but if you run a large wastegate that should work fine.
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Old 05-14-2012, 09:18 PM   #15
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Default Re: just another ls1 s10 blazer swap... with a turbo

You could tune it open loop and ditch the 02 sensors all together.
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