mycool240

hello all... im in process of rebuilding a ls1, it has stock bore and pistons, has been honed for new rings. top ring is showing .025, bottom ring is showing 0.27... is this too loose or will it be ok ? the motor will see a 150 shot later down the road but will be mostly street driven. thanks too all!!!!

Jontall

http://www.wiseco.com/PDFs/Manuals/RingEndGap.pdf

JPH

iTrader: (2)

Those gaps will work.

ls1fst98

iTrader: (3)

thats the gap table i used for my build.

mycool240

using the table you guys posted im coming up with almost .020 and .022... so what should i do? use the ring i have that are coming out at .025 and .027 or try and get a different set??? thanks for all the help by the way!

ls1fst98

iTrader: (3)

I did mine at that spec, but a little looser on nitrous from what I understand isn't a bad thing. I don't know what they consider mild nitrous. Me personally am going to use a 100shot. Hopefully someone with more experience can chime in.

mycool240

from what ive searched i have read that a lil loose for nitrous is good but im tryin to figure out how much is too much.. i dnt want to put these in and have bad blow by or compression loss.

ls1fst98

iTrader: (3)

I take it you didn't get file fits after it was honed? Just bought stock replacements? What year is the block?

mycool240

00 block. there just standard bore replacements sealed power.

ls1fst98

iTrader: (3)

You had I honed? Did you check the cylinder bore to see how much they took off?

farmington

iTrader: (14)

Your ring gap is dependent on the type of piston you're using. Hyper or forged. Check with your piston manufacturer to see what they recommend. If you're thinking about spraying, you might want to put in some stronger rings.

ls1fst98

iTrader: (3)

Since when? Ring gap depends on heat applied to rings and the force because they expand as they heat up. At least that was my understanding. I've never ordered rings and had them say ones for hyper or ones for forged.

mycool240

these are stock pistons... not gonna see nitrous often, but it will be used. i have not checked bore after hone but i will.

A.R. Shale Targa

iTrader: (2)

These are the things to consider......
The machine shop that honed the block doesn't care what your doing for rings
and their gaps. They are only concerned with straightening out the bore
(minimizing taper from top to bottom) and establishing cross hatch.
The .025/.027 gaps are a tad wide but not at all rediculous.
Saying it may see 150 later can and often always turns into 250. Trust me I
know juice and if a little is good....more is better.....
Those gaps will work fine for you.

mycool240

ok... what about the oil ring, whats the spec on it? i searched but havent been able to find the max gap... im at .025 now.

KCS

iTrader: (20)

That's more than enough. I was told by one of the big ring manufacturers that .011" is about the tightest you would want on the oil rings, but .025" will be just fine. There isn't much heat that far down the piston.

farmington

iTrader: (14)

hyper pistons retain more heat at the top of the piston, hence they recommend wider gaps than a forged piston.

mycool240

ok so everyone agree that this thing will live fine with this ring gaps right? if so im gonna go ahead with the build

A.R. Shale Targa

iTrader: (2)

Give er'.....

ls1fst98

iTrader: (3)

i would say to get a good set of file fits and start with that, especially with a new hone and what not. but thats just me. if everyone else disagrees then go for it