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

le1 with a 355?

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Old Mar 29, 2005 | 07:21 AM
  #16  
Mystic97Z's Avatar
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Joined: Aug 2003
Posts: 704
From: Imperial, MO.
Re: le1 with a 355?

Originally Posted by Silvershark
From a 350 to a 355 you will not see any performance increase. You will only see an increase in hp/torque if you go to a 383. Usually people go to a 355 becuase its easier to get pistons etc for a .030 over bore. The power is in the heads cam etc. Click on my link below. Go under specificatons. That's what my motor consists of. I am hoping for a 400rwhp+ car.

isn't performance increase in the same boat as hp/torque increase?

also, i could be wrong, but isn't a 383 bore and a 355 bore both .30 over? just get the more cubes from the 383 fron going with the 3.75 crank rather than the 3.49 right?

also, i had le2 heads/le1 cam and ran 12.80 with a 1.9 60 ft. and one of my cylinders was not firing correctly, when i fixed it, i was beating my buddy's 12.5 (street tire ) car..so you will have no problems seeing low 12's on that combo. as said before, get some traction behind that biatch!
Old Mar 29, 2005 | 08:56 AM
  #17  
bdc95ta's Avatar
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Posts: 1,220
From: houston, texas
Re: le1 with a 355?

I would recomend Hyper-eutectic pistons:
-there light weight
-stronger than cast almost as strong as forged
-cheaper than forged
-they have a smaller expansion rate which equals smaller clearances.
-less noise b/c of reduced piston slap, low to no blow by...
in otherwords a great street piston.
-brandon
Old Mar 29, 2005 | 01:48 PM
  #18  
Inutero's Avatar
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From: jax FL
Re: le1 with a 355?

Ok so the consensus is that the 355 will have no performance gain over the 350? If so, i will just rebuild my 350 and slap the H/C on it.
Old Mar 29, 2005 | 01:59 PM
  #19  
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From: cleveland,ohio
Re: le1 with a 355?

When people change to a 355 from a 350...its usually b/c the piston walls are scored or are out of specs. Its the easiest way just do a rebuild with out stroking it. You will only gain like 5hp, and change your compression ratio slightly. As for a piston...I went with spealedpower forged. Thier a great piston for a basic rebuild. Plus they wont hurt your pocket.
Old Mar 29, 2005 | 08:47 PM
  #20  
SStrokerAce's Avatar
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Re: le1 with a 355?

Depends if you do it right, there is a easy 20hp or more in the bottom end. It's not the cubes but taking advantage of every little thing.

ALWAYS have the bores deglazed by a enging shop with a hone, don't go slapping pistons in a stock bore with the stock 100,000 hone job. No way to seal the rings perfectly.

Bret
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