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**JoeliusZ28** · January 23rd, 2009, 12:56 PM

do you know what compressed thickness is?

**meissen** · January 23rd, 2009, 01:06 PM

I also decided I wasn't too worried about finding the impala gaskets, I just went with the kit because it was easy and has everything.

**JoeliusZ28** · January 23rd, 2009, 01:14 PM

its just a GM part number, not too difficult.

just wondering what your compression ratio is going to be... there are several different compressed thicknesses out there - there are even thinner than impala available.

**Phantom409** · January 23rd, 2009, 01:16 PM

I also decided I wasn't too worried about finding the impala gaskets, I just went with the kit because it was easy and has everything.

You may want to find out B.
A head milled .01 can raise your compression and with the LT-1 being 10.5:1 factory you might need different gaskets.
You may want to look into what they are so you know what you are dealing with.

Just bying a rebuild kit is fine if you aren't changing anything but you did.

**JoeliusZ28** · January 23rd, 2009, 01:19 PM

Originally posted by Phantom383 View Post

You may want to find out B.
A head milled .01 can raise your compression and with the LT-1 being 10.5:1 factory you might need different gaskets.
You may want to look into what they are so you know what you are dealing with.

there is nothing wrong with added compression. its great for an N/A build. I have approximately 11.4:1 in mine and Steve can tune it to run a little extra. Many people have exceeded 12:1 on pump gas.

**my95z28** · January 23rd, 2009, 01:20 PM

Plus, I believe that you need to adjust tuning depending on what the compression ratio is going to be. I would shoot for 11.5:1 if I were you B. That is pretty safe on 93 octane.

**Phantom409** · January 23rd, 2009, 01:21 PM

Originally posted by JoeliusZ28 View Post

there is nothing wrong with added compression. its great for an N/A build. I have approximately 11.4:1 in mine and Steve can tune it to run a little extra. Many people have exceeded 12:1 on pump gas.

Ya but he don't seem to be too worried about his gaskets and that will not help a tuner or him at all.

A tunner is only as good as the info that you give him.

**meissen** · January 23rd, 2009, 02:13 PM

Originally posted by Phantom383 View Post

You may want to find out B.
A head milled .01 can raise your compression and with the LT-1 being 10.5:1 factory you might need different gaskets.
You may want to look into what they are so you know what you are dealing with.

Just bying a rebuild kit is fine if you aren't changing anything but you did.

Ah chit, didn't know about that.

All I know is that they're Fel Pro head gaskets?

Does Fel Pro have many different kinds for the LT1?

**JoeliusZ28** · January 23rd, 2009, 02:27 PM

there is no "need for different gaskets" unless you have a target compression ratio.

this is why i told you to get impalas though, they bump the compression up to about 11:1 without any milling.

there will be nothing wrong with using your fel-pros with only .010 milled. you will be less than 11.5:1 for sure.

**meissen** · January 23rd, 2009, 02:30 PM

Alright, cool. I figured just getting regular fel pros would be easier than trying to figure out what impala gaskets to get which is why I went with this rebuild kit.

**my95z28** · January 23rd, 2009, 04:46 PM

Doesn't he kinda need to know exactly what CR he will be running? For tuning purposes?

**Phantom409** · January 23rd, 2009, 05:20 PM

Originally posted by my95z28 View Post

Doesn't he kinda need to know exactly what CR he will be running? For tuning purposes?

That's what I was getting at with my other post.
You need to know so it can be tuned right.

**meissen** · January 23rd, 2009, 05:25 PM

Yeah, but can't I just do a compression test to find out what the compression ratio is once it's all put back together? Or, different question, isn't there some way to measure what the compression is once it's all put back together before it gets tuned?

**BLKHAWK** · January 23rd, 2009, 08:00 PM

Originally posted by Phantom383 View Post

You may want to find out B.
A head milled .01 can raise your compression and with the LT-1 being 10.5:1 factory you might need different gaskets.
You may want to look into what they are so you know what you are dealing with.

Just bying a rebuild kit is fine if you aren't changing anything but you did.

he's all set with whatever gasket he wants to run PTV won't be an issue and comp. ratio won't be a factor either. we've run lt1's @ 13.to 1 with 93 oct no prob

**c0ncEpT** · January 23rd, 2009, 08:13 PM

Originally posted by my95z28 View Post

Doesn't he kinda need to know exactly what CR he will be running? For tuning purposes?

Why is that?

A good tuner will just start from scratch with the tune and add fuel and timing accordingly until it starts getting knock or he feels its unsafe and back it down from there. Why would his knowledge of the compression ratio have anything to do with it other than needing to know if its going to require race gas or not?

I mean I think its a good thing to know and what not but I think it has more to do with PTV than it does with tuning.

I could be wrong tho.

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