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MTI Stage III LS6 Head question

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Old Sep 29, 2010 | 08:39 PM
  #1  
jlmedrano_1985's Avatar
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Default MTI Stage III LS6 Head question

Hey guys,

I was thinking of picking up a set of these heads but i dont know if they would work on my stock 346 ls1. I've read that they are meant for stroker engines but i cant confirm this info because MTI is longer around.

If i get these heads, I am going to upgrade the cam too so that would be my next decision to make. My mods will be pacesetter headers and Y pipe, FAST 90/90, UD pulley and supporting mods.

Any help would be appreciated.

The flow numbers for the heads are supposed to be

.100 .65 .54
.200 .135 .117
.300 .217 .185
.400 .271 .230
.500 .308 .254
.600 .325 .266
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Old Sep 29, 2010 | 10:12 PM
  #2  
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Probably not what you are looking for on a stock bore motor. Those 2.08 intake valve are pretty big for a 3.9" bore and I believe that they open the cc up for a bigger bore motor.

Valves that big are also going to cause more PTV issues than the smaller 2.02/1.55 valves.

Here's an old GMHTP article on a build with them.
http://www.gmhightechperformance.com...all/index.html
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Old Sep 30, 2010 | 12:47 AM
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I think the stage III are meant for bigger cubes.
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Old Sep 30, 2010 | 10:12 AM
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Camaro ss 2001's Avatar
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dont go above stage 2 LS6 heads for stock LS1 motor!

most of stage 3 heads used for big bores!
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Old Sep 30, 2010 | 07:52 PM
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i had a set they required a 4.0 bore or bigger
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