Numbers back from head install - Page 2 - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

Bo White · 03-27-2017, 09:04 PM

http://www.hotrod.com/articles/hrdp-...er-heads-test/

Gunmetal Speedster · 03-27-2017, 10:23 PM

Quote:

Originally Posted by Bo White

http://www.hotrod.com/articles/hrdp-...er-heads-test/

Good read

Bo White · 03-27-2017, 11:56 PM

Yes it is.

07-SRT · 03-28-2017, 06:57 PM

Just a thought, is it possible my pushrod length could be off costing me hp? My porter said the lowest gain he has seen from the work O had done on hp side was +23

bkevind · 03-28-2017, 07:05 PM

Curious if there is a lot more average hp/tq now than the peak numbers suggest?

KonigWolf · 03-28-2017, 10:19 PM

Quote:

Originally Posted by 07-SRT

not what I expected. Before. SAE479/424 after SAE 490/449.Same dyno
The tq increase Im happy with but 11hp...

Quote:

Originally Posted by 07-SRT

Cam, LT headers, Cai..ported stockers that were milled.20 and larger 1.60 exhaust valves...

I made 481/427 this past Friday. I was hoping my numbers would have been closer to your second set.

Bo White · 03-28-2017, 10:38 PM

I believe some of the torque came from the milling.

07-SRT · 03-29-2017, 06:34 AM

Quote:

Originally Posted by Bo White

I believe some of the torque came from the milling.

Thats what my porter said but he also said isnt right with 11hp...He wants me to measure pushrod length again and check for vacuum leaks

07-SRT · 03-29-2017, 06:39 AM

Quote:

Originally Posted by bkevind

Curious if there is a lot more average hp/tq now than the peak numbers suggest?

It was up 20 hp at 5k but hp seems to drop off quicker after 6k

BFASTNOTLAST · 03-29-2017, 07:33 AM

The drop off is opposite of what you would expect. Mine carried out a lot more compared to the stock head. AFR / timing was good ?

07-SRT · 03-29-2017, 10:07 AM

Quote:

Originally Posted by BFASTNOTLAST

The drop off is opposite of what you would expect. Mine carried out a lot more compared to the stock head. AFR / timing was good ?

Yes A/F was good and he added timing until it produced KR and backed off until there wasn't any KR...

03-28-2017, 06:57 PM	#18
07-SRT Drives: 2015 Camaro SS Join Date: Sep 2011 Location: Jacksonville, Fl Posts: 713	Just a thought, is it possible my pushrod length could be off costing me hp? My porter said the lowest gain he has seen from the work O had done on hp side was +23 __________________ 2015 Camaro 2SS Cam/Heads/FBO 498/447 SAE

03-29-2017, 07:33 AM	#24
BFASTNOTLAST Drives: 2012 SS LS3 Join Date: Mar 2012 Location: Denver NC Posts: 1,411 View My Garage	The drop off is opposite of what you would expect. Mine carried out a lot more compared to the stock head. AFR / timing was good ? __________________

03-27-2017, 09:04 PM	#15
Bo White Drives: 2015 Summit White 2SS 1LE Join Date: Feb 2012 Location: Vance Alabama Posts: 8,018	http://www.hotrod.com/articles/hrdp-...er-heads-test/

03-27-2017, 11:56 PM	#17
Bo White Drives: 2015 Summit White 2SS 1LE Join Date: Feb 2012 Location: Vance Alabama Posts: 8,018	Yes it is.

03-28-2017, 07:05 PM	#19
bkevind Drives: 2013 2SS RS 1LE Join Date: Aug 2016 Location: Austin Posts: 555 View My Garage	Curious if there is a lot more average hp/tq now than the peak numbers suggest?

03-28-2017, 10:38 PM	#21
Bo White Drives: 2015 Summit White 2SS 1LE Join Date: Feb 2012 Location: Vance Alabama Posts: 8,018	I believe some of the torque came from the milling.