6L Iron Block, 12psi - LS1TECH



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6L Iron Block, 12psi

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Old 01-19-2012, 02:35 AM   #1
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Default 6L Iron Block, 12psi

Just now getting around to getting back on ls1tech. Been years, but finally got a motor to hold together, got a turbo that doesn't blow oil out seals, and a tune.

Got car tuned at RPM in DE around July.

93 oct.

681hp/668tq on 12psi on safe tune.



751hp/692tq. on accidental 14.5 setting.



6L iron block, heads/cam, t56, 12-bolt 3.73 gears. pt76gts

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Old 01-19-2012, 02:38 AM   #2
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What heads you got on it? the 317s aren't that bad stock, when you get them ported... man do they flow.
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Old 01-19-2012, 02:40 AM   #3
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Trickflow fast as cast, with yella terra rockers.
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Old 01-19-2012, 02:53 AM   #4
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Quote:
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Trickflow fast as cast, with yella terra rockers.
317s are pretty good but I'm sure those are much better... What'd that do to the compression?
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Old 01-19-2012, 02:59 AM   #5
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317s are pretty good but I'm sure those are much better... What'd that do to the compression?
Not sure, been so long since the build ... this has been years in progress. VA speed long block. Wiseco-Manley with a turbo application dish. I believe these were the 220cc heads. Sorry for lack of detail but I said, build me a motor that wont die like the last 3 motors I had built (from different builders over the years), and they set me up what I have now.
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Old 01-19-2012, 03:10 AM   #6
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Quote:
Originally Posted by 02BlueFirehawk View Post
Not sure, been so long since the build ... this has been years in progress. VA speed long block. Wiseco-Manley with a turbo application dish. I believe these were the 220cc heads. Sorry for lack of detail but I said, build me a motor that wont die like the last 3 motors I had built (from different builders over the years), and they set me up what I have now.
Hah, it's all good man... good luck with this motor! Sounds like it's already off to a good start with those numbers @ 12psi.
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Old 01-19-2012, 07:24 AM   #7
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Congrats on the #'s...
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Old 01-19-2012, 07:53 AM   #8
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Why does it look like its taking so long to spool, doesn't look like it hit 14lbs until 5000 + rpm? What boost controller are you running or is this off the wastegate? What compression ratio?

Thanks
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Old 01-19-2012, 09:41 AM   #9
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Also curious about this...exhaust or boost leak maybe?
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Old 01-20-2012, 11:05 PM   #10
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Looks like some solid numbers for sure.

Nitroused what did you make at 10psi? I forget.
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Old 01-20-2012, 11:56 PM   #11
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Awesome numbers! Sounds like you've been tinkering with it for quite a while, time to enjoy your work!
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Old 01-21-2012, 06:16 AM   #12
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Quote:
Originally Posted by Fbodyjunkie06 View Post
Looks like some solid numbers for sure.

Nitroused what did you make at 10psi? I forget.
I made 717 on 11.5lbs never dyno'd it on 10.
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Old 01-27-2012, 01:08 PM   #13
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What A/R is the turbine side of that GTS76?

What compression is this motor setup for?
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Old 01-29-2012, 02:27 PM   #14
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Quote:
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What A/R is the turbine side of that GTS76?

What compression is this motor setup for?
+1. Also, any specs on that cam?
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Old 02-02-2012, 02:52 AM   #15
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Here's my setup

Turbo:
Precision PT76GTS with billet wheel, non bb. T4 housing.
.96 a/r Flows enough air for 1200 hp. Turbonetics Racegate dumps to atmosphere.

Fuel:
A1000 into 8AN feed, to 80# injectors out to boost referenced regulator, 6an return.

Below are the motor specs:
Custom Cam:
Intake Exhaust
Adv Cur 286 282
Dur @ .050 236 230
Lift .617 .605
Lobe Sep.: 116

General Motor Specs:
6.0 iron block fully machined-hone, decked line bored
Stock crank
Callies h-beam rods
Wiseco-manley forged pistons
Clevite h main and rod bearings
Total seal steel rings
Ported oil pump
Custom cam
Ls7 lifters
ARP Hardened pushrods
Yella terra roller rockers
ARP head studs
Trickflow fast as cast heads
Gm head gaskets
New gaskets and seals
ARP main bolts

Stock M6 transmission swap, with textera twin-disc clutch.
A1 Driveshaft
Strange 12-bolt, with 3.73 gears.

GM 2 bar map sensor, No MAF, Speed density tune, IAT sensor inline before the t-body
3.5” air-air FMIC with 3” intercooler piping, HKS SSQV bov
I have a Griffin 3-core race radiator custom mounted in the front, with a single pusher fan.
Stock water pump
No a/c
Stock LS6 intake manifold
Shortie aftermarket truck exhaust manifolds, into two-into-one 2.5” stainless up-pipes (heat wrapped), into turbo, out of turbo into 3” downpipe (heat wrapped), out to cat-less loudmouth exhaust. (Custom V-band setup allows one to remove cat-back and have dump after rear tire under car)

Getting some things done at RPM to wrap up loose ends. Want Fran to put in back on the dyno with a full run at 15 psi.
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Old 02-02-2012, 02:57 AM   #16
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Not sure what wastegate spring they put in the car but they had tried a bunch of different springs. I think they had a 5 psi spring in at one point. It is boost controlled however HKS EVC5; I haven't tinkered with the boost controller however.
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Old 02-02-2012, 05:48 AM   #17
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weak.
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Old 02-02-2012, 06:26 AM   #18
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Good numbers... I can't wait to get mine on the Dyno.
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Old 02-02-2012, 07:20 AM   #19
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Ever figure out what the slow spool was about? I have seen twin 76 5.3 motors hit peak torque close to the same rpm and 6.0 T6 91mm turbos come in at around 4500 rpm. I would have expected a single on a 6.0 to come in somewhere around 3500-4000 rpm, not 5000+ rpm.
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Old 02-02-2012, 11:55 AM   #20
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Quote:
Originally Posted by itsslow98 View Post
weak.
Don't hate! Allen.

Quote:
Originally Posted by Sarg View Post
Ever figure out what the slow spool was about? I have seen twin 76 5.3 motors hit peak torque close to the same rpm and 6.0 T6 91mm turbos come in at around 4500 rpm. I would have expected a single on a 6.0 to come in somewhere around 3500-4000 rpm, not 5000+ rpm.
I never really noticed an issue but I'll talk with Fran at RPM to see if they can put their 2 cents in on it. It may be a matter of adjusting the duty on the boost controller.
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