LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

396 LE3 heads/intake/cam

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Old Oct 11, 2006 | 06:09 PM
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396 LE3 heads/intake/cam

im going to start building my 396 stroker. im definately going to go with the LE3 setup, sounds about the best. Im thinking about putting a blower on down the road(not 100% sure yet). Im wondering if the LE3 setup would be blower friendly or not. What would u guys/gals reccomend for pistons/ rods/ crank? ans also if there is anybody running a similar setup i would like toknow how it worked out for ya? also what kind of power do u thinki can make with an N/A setup if i decided not to go blower? Any ifo on this stuff is greatly appreciated. i want to get started on this a s soon as possible.

Thanks
Old Oct 11, 2006 | 06:15 PM
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Re: 396 LE3 heads/intake/cam

my advice would be to go to victoryracingengines.com
They have a really nice 396 short block for (i think) 4800. U can check what parts they run, or but the block, or even see if they would sellu a rotating assembly
Old Oct 11, 2006 | 06:23 PM
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Re: 396 LE3 heads/intake/cam

i know a really good machinistat at home here so i dont really want to buy a whole shortblock. im just going to piece it together piece by piece i think. i can get some really good prices. but i will definately check out their rotating assemblies. thanks for the info
Old Oct 11, 2006 | 06:30 PM
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Re: 396 LE3 heads/intake/cam

There are various options for crankshaft, connecting rods and pistons. You could go with a Eagle 4340 Forged Crankshaft, Eagle H-Beam Connecting Rods and SRP Pistons. We also carry the Compstar Speed Packs which consist of Compstar Forged Crankshaft, Compstar Connecting Rods and Mahle Pistons. Or we carry a variety of parts that can be put together into a custom kit.
Old Oct 11, 2006 | 08:59 PM
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Re: 396 LE3 heads/intake/cam

The issue that you will have from the blower to the NA setup is the compression and the camshaft.

A NA cam vs. a Blower cam are completely different, so expect this when you change. A comprimise cam wouldn't work well in either setup.

Same with the compression. You are looking at 12:1 in the NA setup and 9:1 in the blower setup. Both would need different pistons. The -14cc SRP dish pistons wouldn't be good for the NA because they would be way off on compression and the blower can overpower them since they are a NA design.

Bret
Old Oct 11, 2006 | 09:08 PM
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Re: 396 LE3 heads/intake/cam

Wouldnt some TFS heads ported by Lloyd work out better as well, considering the displacement?

Steve
Old Oct 11, 2006 | 09:09 PM
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Re: 396 LE3 heads/intake/cam

Yep
Old Oct 11, 2006 | 11:08 PM
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Re: 396 LE3 heads/intake/cam

i understand all that but im on the fence if its going to be blown or not. lets just say its just going to be a nasty N/A motor then what kinda parts we talking. it still needs to be pump gas friendly though.
Old Oct 11, 2006 | 11:23 PM
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Re: 396 LE3 heads/intake/cam

Both of the ones I've mentioned are pump gas friendly. That's why reverse cooling is so nice.

Bret
Old Oct 11, 2006 | 11:38 PM
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Re: 396 LE3 heads/intake/cam

i just never thought that a 12:1 motor would be 100% pump gas friendly what do people usually push these motors to for N/A cars?
Old Oct 12, 2006 | 08:51 AM
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Re: 396 LE3 heads/intake/cam

Originally Posted by FastZ8
i just never thought that a 12:1 motor would be 100% pump gas friendly what do people usually push these motors to for N/A cars?
I'm running about a 12:1 SCR and my car is pump gas friendly. Keep the thing cool and you'll be alright. It also helps to be able to do your own tuning, that way you can retard the timing a little bit on warm days or advance the timing for cool days at the track with 110.
Old Oct 12, 2006 | 11:20 AM
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Re: 396 LE3 heads/intake/cam

i think i would like to run a little less compression just to be on the safe side and to not have to worry about tunning the car every time the weather changes though.
Old Oct 12, 2006 | 11:27 AM
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Re: 396 LE3 heads/intake/cam

Just have the chambers in the heads be a little bit bigger then. TFS heads can be about 64cc and with flat tops that will put the compression in a safe spot on a 396. I just did a 396 that was completely safe at 11.8:1 and it had 62cc TFS heads.

Bret
Old Oct 12, 2006 | 11:34 AM
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Re: 396 LE3 heads/intake/cam

Originally Posted by FastZ8
i think i would like to run a little less compression just to be on the safe side and to not have to worry about tunning the car every time the weather changes though.
Well, tune it once for daily driving. Then, go back and add a couple of degrees of timing to the WOT part of the timing tables for racing with 110. It takes longer to pull the program out and put it back in than it does to make the changes. Simple stuff.
Old Oct 13, 2006 | 09:39 AM
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Re: 396 LE3 heads/intake/cam

Originally Posted by FastZ8
i just never thought that a 12:1 motor would be 100% pump gas friendly what do people usually push these motors to for N/A cars?
once ran 13.3 to 1 compression with a solid roller 236/242 cam on a 114 with no issues on plain ol pump gas. Did notice the car wanted to run hotter and when it got hot in warmer weather; you would pick up just a tiny bit of pinging but when the weather was cool. there were no issues.

FYI.....The 13.3 compression was a pure accident. We there thinking the car was running 12.7 to 1 and found out we put a thinner .029 gasket on thinking it was a .039. Stuff happens!!



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