Small Block & Big Block Chevy Specific Mouse & Rat Motor Discussion & Conversions

305 sbc...

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Old 04-10-2009, 12:48 PM
  #81  
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That would be the ony way to build it, with 6.0 rods, IF i was to bother with one.
Old 04-10-2009, 07:09 PM
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Originally Posted by 1997bird
Here is a quick internet link for ya, http://www.cnc-motorsports.com/produ...D=19041&CtgID= .
That's awesome. That's probably 100g lighter than most 4.00+ forged pistons, cheap too. Thanks again.
Old 04-10-2009, 07:38 PM
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BTW KCS, i used a set of those KB forged line series, i dont know about what your doing, but for me, my NA 383 had no issues with them, screamed to 7k.
Old 04-10-2009, 11:55 PM
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Originally Posted by ZONES89RS
BTW KCS, i used a set of those KB forged line series, i dont know about what your doing, but for me, my NA 383 had no issues with them, screamed to 7k.
I'm sure they're OK, but the 1.133" compression has me worried for a turbo engine. With 1/16" rings, doesn't seem like there would be enough room to keep them far enough away from the combustion heat.
Old 04-11-2009, 02:04 AM
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That is what i was thinking, it worked fine for my NA application though.
Old 04-11-2009, 02:30 PM
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Originally Posted by KCS
I'm sure they're OK, but the 1.133" compression has me worried for a turbo engine. With 1/16" rings, doesn't seem like there would be enough room to keep them far enough away from the combustion heat.
so u going thru with the build?
mpt70 and mpt76 are pretty good priced t4 turbos, spool pretty quick, excellent price.
Old 04-11-2009, 03:27 PM
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Originally Posted by KCS
I'm sure they're OK, but the 1.133" compression has me worried for a turbo engine. With 1/16" rings, doesn't seem like there would be enough room to keep them far enough away from the combustion heat.
The piston's are strong enough for you. How much boost are you planning to run with this build? If it's less than 15 lbs. then you will still be ok, but if its more than that you will need to use the 5.7 rod combo.
Old 04-11-2009, 04:10 PM
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Originally Posted by NemeSS
so u going thru with the build?
mpt70 and mpt76 are pretty good priced t4 turbos, spool pretty quick, excellent price.
Looks that way. I just got a cam/springs/retainers/etc. for my LS1, so it may be next month until I can get some cash for a 3rd gen F body.

I thought T4's were a smaller turbos, something more common on 4 bangers. I was thinking of a single turbo off a diesel or something. Build the longblock like a brick house, and just max out the turbo.
Old 04-11-2009, 04:13 PM
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Originally Posted by 1997bird
The piston's are strong enough for you. How much boost are you planning to run with this build? If it's less than 15 lbs. then you will still be ok, but if its more than that you will need to use the 5.7 rod combo.
I'm sure the piston will be strong enough, but I don't know if that 1.133" compression height will allow the 1/16 rings to be far away enough from the combustion heat. 1.133" is something you'd see for a NA motor, 1.300+ is more common for turbo/nitrous motors.
Old 04-12-2009, 04:45 AM
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Originally Posted by KCS
I'm sure the piston will be strong enough, but I don't know if that 1.133" compression height will allow the 1/16 rings to be far away enough from the combustion heat. 1.133" is something you'd see for a NA motor, 1.300+ is more common for turbo/nitrous motors.
Yes I do know this, however I was still talking about a turbo application. I have had several discussions with the tech people at Ross & JE about a high boost 327 combo for a customer of mine. At 30 lbs of boost they said that I could still run a 1.25" compression height piston & be safe. If I were you I would contact Silvolite, since they make the piston, and find out what they say the limitations are for the piston application at hand.
Old 04-13-2009, 02:36 PM
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Originally Posted by KCS
Looks that way. I just got a cam/springs/retainers/etc. for my LS1, so it may be next month until I can get some cash for a 3rd gen F body.

I thought T4's were a smaller turbos, something more common on 4 bangers. I was thinking of a single turbo off a diesel or something. Build the longblock like a brick house, and just max out the turbo.
T4 refers to the mounting flange of the turbine housing,



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