Low Comp. BB Chevy

J. Kuchel · 10-06-2015, 09:05 PM

I know this is the Stock and Super Stock Tech forum but I thought you guys would have the most experience running low comp. engines and having good luck with them. I have a 522 ci. BB Chevy that is a 9.6 to 1 comp. engine that I want to be a really competitive bracket engine. I was told that it won't be that competitive because it doesn't have a compression. It's going into a all round tube very light weight Camaro with a glide and 4 link rear end. I watch some of these stockers run dead on a lot. I hope you all can guide me on the right path. I don't want to rebuild it because its fresh.

Kevin Panzino · 10-06-2015, 10:21 PM

Not a problem in the least.

By the way, the winningest (is that a word?) car in the history of NHRA runs a low compression combo.

Billy Nees · 10-07-2015, 07:33 AM

You can build "compression" (cylinder pressure) with careful camshaft selection.
For what it's worth, back in the old days when I was Bracket Racing my Camaros (smallblocks) I tried to build as much mechanical compression as I could. The higher the compression, the less a combo seems to be affected by the weather.

Mike Taylor 3601 · 10-07-2015, 01:48 PM

low compression will be fine bracket racing, the main thing for consistency, isn't how much compression you have,but how well it is sealed up, a good sealing engine, valves,rings etc. will be more consistent than one not sealed up well.
Like Billy said cam is different in low compression engine.
Mike Taylor 3601

J. Kuchel · 10-10-2015, 11:02 PM

The engine is a 522 ci. BB Chevy that is 9.6 - 1, camshaft is intake .550 exaust is .549, 260 intake 270 exhaust @ .050, Dean Oliver Q- jet, dualplane GM intake.

10-06-2015, 09:05 PM	#1
J. Kuchel Junior Member Join Date: Oct 2015 Posts: 5 Likes: 0 Liked 0 Times in 0 Posts	Low Comp. BB Chevy I know this is the Stock and Super Stock Tech forum but I thought you guys would have the most experience running low comp. engines and having good luck with them. I have a 522 ci. BB Chevy that is a 9.6 to 1 comp. engine that I want to be a really competitive bracket engine. I was told that it won't be that competitive because it doesn't have a compression. It's going into a all round tube very light weight Camaro with a glide and 4 link rear end. I watch some of these stockers run dead on a lot. I hope you all can guide me on the right path. I don't want to rebuild it because its fresh.

10-06-2015, 10:21 PM	#2
Kevin Panzino Senior Member Join Date: Oct 2002 Location: Pittsburgh Posts: 520 Likes: 245 Liked 550 Times in 106 Posts	Re: Low Comp. BB Chevy Not a problem in the least. By the way, the winningest (is that a word?) car in the history of NHRA runs a low compression combo.

10-07-2015, 07:33 AM	#3
Billy Nees VIP Member Join Date: Oct 2002 Location: On a hilltop in Pa. Posts: 4,218 Likes: 3,091 Liked 6,772 Times in 1,519 Posts	Re: Low Comp. BB Chevy You can build "compression" (cylinder pressure) with careful camshaft selection. For what it's worth, back in the old days when I was Bracket Racing my Camaros (smallblocks) I tried to build as much mechanical compression as I could. The higher the compression, the less a combo seems to be affected by the weather. __________________ Billy Nees 1188 STK, SS Make tech "TECH" again!

10-07-2015, 01:48 PM	#4
Mike Taylor 3601 VIP Member Join Date: Oct 2008 Location: Somerset,Ky Posts: 1,303 Likes: 198 Liked 116 Times in 48 Posts	Re: Low Comp. BB Chevy low compression will be fine bracket racing, the main thing for consistency, isn't how much compression you have,but how well it is sealed up, a good sealing engine, valves,rings etc. will be more consistent than one not sealed up well. Like Billy said cam is different in low compression engine. Mike Taylor 3601

10-10-2015, 11:02 PM	#5
J. Kuchel Junior Member Join Date: Oct 2015 Posts: 5 Likes: 0 Liked 0 Times in 0 Posts	Re: Low Comp. BB Chevy The engine is a 522 ci. BB Chevy that is 9.6 - 1, camshaft is intake .550 exaust is .549, 260 intake 270 exhaust @ .050, Dean Oliver Q- jet, dualplane GM intake.