Is there such thing as TOO MUCH compression for a daily driver? Car will able to be run on 93 octane without problems (motor will be driven daily with 94 octane).

Too much compression like things will wear faster/break/CAUSE FOR FIX?

 

I have heard of people running 13:1 CR without problems running pump gas.
The LT1 is surprisingly good for higher compression than most would think, reverse flow, custom programming, good quality gas and less sensitive Knock sensors make a big difference.

At least, that's what i've been told.

 

I run 11.8:1 compression on 92 octane with no problems.

 

Static compression means jack, Dynamic compression (taking in to account camshaft profiles, cylinder pressure, etc) is what matters.

 

12:1 here

 

But i'm saying will higher compression cause parts to wear faster?

 

No.

 

Thanks for the answer... simple and straight to the point.

How much more gas is wasted on a higher compression motor?

 

Higher compression, all else equal, is more fuel efficient.

 

Are you freakin from your other post when someone said we'd be breakin stuff alot with that compression. I got looks from everyone when I told them what my compression was, including my engine builder. Lloyd Elliot assured me everything would be just fine. Bret designed my cam and this thing pulls like a ****. I was shocked a bit when I saw what the specs were. I was way off, but I am no cam expert either. Before they would do anything I had to get the deck height, piston volume and head gasket to get my quench right. My quench is at .036 and Lloyd said it would be perfect.I had faith in those guys and they haven't let me down. When put to a scan tool it shows no timing being pulled out and this thing runs rich and I desperately need my datamaster to show up soon!!!! It's got more power, I just need to tune it some more.
About the only thing its hard on is my wallet with 93 premium goin for about 2.47 a gallon and well.... the car isn't real "fuel efficient", course... I think I was wearin lead shoes. Lloyd and Bret both

 

How often you drive the car?

Thanks for the info

 

Damn,Bret finally got brave and put the quinch at the narrow end.Way to go Bret.
He's always recommending .040+.

 

How much timing was pulled to make it work? How much pinging/knocking did you have or do you have...?

My friend is insisting that I can't run 11.8:1 compression on pump gas without pulling a serious amount of timing and losing a serious amount from the high compression motor.

Also insists that nitrous on pump gas is a complete no no

 

well... when I am not breaking stuff. So far shredded 2 serpentine belts. My tensioner was weak so when I would nail the gas and spin past 5k it would jump the belt and shred them. Thats fixed. Melted the cruise cable on the driver side primary. Cut my new taylor OTC plug wires by routing them like an idiot. It got cut on the power steering pulley. Was chasing a bad idle problem but may have it figured out by now. Waitin for datamster so I can tune it.
I drive the car everyday I can. I don't drive it in the rain and my job takes me out of state often but typically 100-150 miles per week.
An important thing to consider is the dynamic compression ratio. That is using the valve timing events. I worked with Lloyd on this as he wouldn't start till he had the info he needed.

 

This was more Lloyd than Bret. I had some troubles when it came to doing my 4 bolt conversion. A cap was NOT seated in the register complete and it was out of whack. I had to have it align bored (again ) and they decked the block (again ). My piston ended up being .010 in the hole and using the fel pro 5716 .026 we came up with .036 quench. Lloyd said between .035 and .045 would be good but no tighter. Bret was sorta forced to work with it. That would explain the "different" cam specs. I still think its weird but don't dwell much on it cause it pulls like a **** and thats all that counts.