99s10sbc

iTrader: (2)

Ok did some reading and some searching didnt really find the answer i wanted so. I have a 98 TA what can i do with the factory block as far as boring and stroking. Would a 4.000 stroke with a 6.125 rod give me a 383? Could i just bore it and make a forged 0.30 over LS1?

BIG_MIKE2005

iTrader: (116)

Yes, you can buy a 383 rotating assembly with 4.00" stroke crank & 6.125 rods to make a 383. You'll need the block bored/honed to a 3.905 most likely. Thats about the max bore I'd ever suggest to someone on a stock block.

Or save the money of the 4.00" stroker crank & build a 347 reusing the stock crank. Thats what I'm doin. What are your end goals, you stayin N/A, nitrous or boost?

conan

iTrader: (5)

Yes a 4" stroke will get you a 383ci. You can not take the ls1 .030 over with out new sleaves (not worth the $$$) .010 is about the biggest you can go in the ls1.

99s10sbc

iTrader: (2)

I would be good with a forged 347 with a little gas maybe. As far as goals well i would like to keep it streetable and dont want to spend mega tons of money on it. Thinkin of sellin my 99 s10 with a sbc and putting the money in the TA. It has 130000 miles on it i wonder if the cly. would even clean up at .010?

BIG_MIKE2005

iTrader: (116)

Should, I opened mine up for my H/C swap with 103k on it & still had the stock crosshatchings in the cylinders. These motors are a different animal than the old school 350's.

With a 347 you only need a slight bore/hone. Stock bore is 3.898, since you'll want a clean up hone you'll either want a 3.903 or 3.905 piston. Run your stock crank with a set of ARP main studs & have the block align honed while having the cylinders taken care of too. Stock cranks are pretty damn stout and will be re-used in a 347 build.

I suggest either Diamond or Weisco for pistons & to save some cash but still get a good rod grab a set of Scat rods from TSP. On your pistons since your not wanting anything radical I'd suggest -4 Diamonds topped off with some 243 heads & stock MLS head gaskets.

99s10sbc

iTrader: (2)

Are the 243's what came on the car?

garygnu

no #243s on F-bodies .go to TSP webstore and look at rotating assemblies. also look at their heads and cam kits.

99s10sbc

iTrader: (2)

Well the TSP 2.5 5.3 heads look like a good deal for a budget build will have to do more research to find a good total combo thanks for the help guys.

Mart00SS

iTrader: (19)

This guy is right, I've seen a 110k ls1 that was beat on with all kinds of track abuse, ms4 cam, 150 shot. Spun a bearing, pulled the motor and the cyls still had a decent cross hatch on them and it cleaned up with a .004 deck and 3.905 bore (stock is 3.898)

99s10sbc

iTrader: (2)

Well mine is burning a little oil so that has me a little concerned on it cleaning up with just a hone.

BIG_MIKE2005

iTrader: (116)

LOL, burning a little oil is typical for the LS1's as well, doesnt mean your cylinders are toast. Could just need some new rings. Our wonderful(sarcastic) PCV system you can thank for the oil consumption too.