SmokinZ28lt1

I have a 1994 Camaro lt1 headers, exhaust, no cat, 58mm TB...

I just bought a set of dart pro 1 aluminum heads with 58cc chambers and from what I have read just doing searches is that stock heads usually have 53-56cc chambers when they are checked and I don't want to loose compression when I put the 58cc heads on. I was going to have them machined down to 54cc and use the .029 head gasket and gain a little compression

I used the compression calculator on summits website with 54cc heads, -5cc pistons, .025 deck clearance and .029 gasket it says it'll be 11.2:1
Sound about right?

I was just wondering if that is going to be ok with the stock cam? i'm also getting my pcm tuned for bigger injectors get rid of emissions if that'll make and difference

RamAir95TA

Assuming you're on the stock bottom end my calculator says the same. You'll be fine for sure.

But your plan is to run the Dart heads with the stock cam, did I read that correctly?

KW Baraka

I wouldn't do it .

The stock cam is small for an 11.2:1 static compression engine. Off the top of my head, the dynamic compression for that engine would be about 10.3:1.....that's awfully high. You don't want that. Also, your quench (.025" engine deck + .029" head gasket = .054" quench) is really bad for even a moderately high compression engine.

To keep detonation at bay, your tuner would have to pull so much timing, your car would perform like a Ford Escort.

If you're gonna take the time & money to deck the engine at all, then heck.....might as well put in a more optimal cam. The CC-503 or a tiny bit bigger would go really well with this engine and you'll still maintain a very high degree of drivability for a daily driver .

Just my $.02.

KW

Skedaddle

Which Dart LT1 heads did you get - 180cc, 200cc, or 215cc?

SmokinZ28lt1

I have the 180cc and yea I kinda thought I would halfto run a cam just don't quite have money for it yet though....

I had my eye on the CC 07-306 .510/.540 you think that work better with 11.2:1cr?

Also I'm not decking the block the engine isn't coming out....all I was going to do was plain the heads down until I had 54cc chambers so I didn't loose compression.

And as for the quench would it be better to use the (steel shim .015 +.025 deck) for a .040 quench?

If the .04 quench would work I could just leave my chambers at 58cc and be at 11.05:1 cr if you think that would work better?

lt1-xjs

This post makes no sense. Many, many people change to the Impala .029 gasket from the stock .049 gasket to boost compression about .5 point. I would definitley mill the heads to 53-54 cc and use the .029 gasket.