Cam Overlap - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

zz430camaro · 02-19-2018, 12:07 PM

What is a cam overlap value to stay at or under to maintain good drivability with a cam?

hou30guy · 02-19-2018, 12:08 PM

Call and as btr

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Bo White · 02-19-2018, 01:41 PM

10* and under is what I recommend. Also stay under 230* intake duration.

zz430camaro · 02-19-2018, 01:50 PM

Quote:

Originally Posted by Bo White

10* and under is what I recommend. Also stay under 230* intake duration.

Was thinking of running the TSP 225/236 .629"/615" 113 LSA, 109 ICL seems like a good all around street cam, makes good power and only has 4.5 degrees overlap. Small cam but I just cruise on the street and this seems like it will work good.

PapaKlutch · 02-21-2018, 07:18 PM

Quote:

Originally Posted by zz430camaro

Was thinking of running the TSP 225/236 .629"/615" 113 LSA, 109 ICL seems like a good all around street cam, makes good power and only has 4.5 degrees overlap. Small cam but I just cruise on the street and this seems like it will work good.

I'm at 5.9 degrees overlap with 227/236. 113 +3

Very nice street manners for a cammed car.

hou30guy · 02-21-2018, 07:50 PM

I have cam 231/248 .617 .595 120 + 5 with almost 0 overlap

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Bo White · 02-22-2018, 12:52 AM

Im at 19*......lol

zz430camaro · 02-22-2018, 04:11 AM

Quote:

Originally Posted by Bo White

Im at 19*......lol

That is the one thing I miss about a carb and distrubutor. We did not have to worry about drivability, bucking or surging like you have to with these computer cars.

TXM62SS · 02-22-2018, 06:23 AM

Quote:

Originally Posted by Bo White

10* and under is what I recommend. Also stay under 230* intake duration.

Bo's suggestion is on the mark. All subjective to the person driving but this guidance is a very good place to start.

sixty9fordkiller · 02-22-2018, 09:34 AM

i think mine is going to be around 17ish

I can hardly wait! Waited 8.5 years to put a cam in this thing without a problem and now im 32 days away from my appointment and every day seems like an eternity now.

BFASTNOTLAST · 02-22-2018, 09:49 AM

25* here and no issues. It's all in the tuning to make it work....

Rhino79 · 02-22-2018, 10:50 AM

Overlap will act different depending on valve events.

If the overlap period on intake valve open isnt very large but the overlap period on the exhaust close is large it can still drive good.

The more overlap you put on the intake open side it will drive rougher at slower engine speeds.

Bo White · 02-22-2018, 02:14 PM

Yes its in the intake centerline and split but thats all in general rule of thumb for the average street guy that I was talking about.

sixty9fordkiller · 02-22-2018, 02:16 PM

Quote:

Originally Posted by BFASTNOTLAST

25* here and no issues. It's all in the tuning to make it work....

daily driver?

02-19-2018, 12:07 PM	#1
zz430camaro Drives: 2015 1LE Join Date: Oct 2015 Location: Cleveland, OH Posts: 1,485	Cam Overlap What is a cam overlap value to stay at or under to maintain good drivability with a cam?

02-19-2018, 01:41 PM	#3
Bo White Drives: 2015 Summit White 2SS 1LE Join Date: Feb 2012 Location: Vance Alabama Posts: 8,018	10* and under is what I recommend. Also stay under 230* intake duration. __________________ Retired wanna be cylinder head porter 2015 2SS 1LE Clutch reservoir, Vararam DRX, ported TB, TSP 2" headers, MGW shifter Totalled: 2010 1SS Wilkes Performance/Eagle 416 shortblock, TSP custom valvetrain, PRC 260 heads, Edelbrock Pro Flo 102, th400 swap, 8" PTC 5500 stall= 535/435 at the wheels tuned Gen 3 Performance and Dyno 10.97 @ 124 full weight in 3100 DA CamaroFest X

02-22-2018, 12:52 AM	#7
Bo White Drives: 2015 Summit White 2SS 1LE Join Date: Feb 2012 Location: Vance Alabama Posts: 8,018	Im at 19*......lol __________________ Retired wanna be cylinder head porter 2015 2SS 1LE Clutch reservoir, Vararam DRX, ported TB, TSP 2" headers, MGW shifter Totalled: 2010 1SS Wilkes Performance/Eagle 416 shortblock, TSP custom valvetrain, PRC 260 heads, Edelbrock Pro Flo 102, th400 swap, 8" PTC 5500 stall= 535/435 at the wheels tuned Gen 3 Performance and Dyno 10.97 @ 124 full weight in 3100 DA CamaroFest X

02-22-2018, 09:34 AM	#10
sixty9fordkiller Donkey Dick Cam Camaro Drives: 2010 2SS/RS LS3 M6 Join Date: Oct 2009 Location: Los Angeles, CA Posts: 2,000	i think mine is going to be around 17ish I can hardly wait! Waited 8.5 years to put a cam in this thing without a problem and now im 32 days away from my appointment and every day seems like an eternity now. __________________ Bone Stock

02-22-2018, 09:49 AM	#11
BFASTNOTLAST Drives: 2012 SS LS3 Join Date: Mar 2012 Location: Denver NC Posts: 1,411 View My Garage	25* here and no issues. It's all in the tuning to make it work.... __________________

02-19-2018, 12:08 PM	#2
hou30guy Drives: 2011 convertible 2ss/rs Join Date: Sep 2015 Location: Houston Posts: 971	Call and as btr Sent from my SM-N950U using Tapatalk

02-21-2018, 07:50 PM	#6
hou30guy Drives: 2011 convertible 2ss/rs Join Date: Sep 2015 Location: Houston Posts: 971	I have cam 231/248 .617 .595 120 + 5 with almost 0 overlap Sent from my SM-N950U using Tapatalk https://youtu.be/wqc5snH17is

02-22-2018, 10:50 AM	#12
Rhino79 Drives: 2010 Camaro SS L99/Auto Join Date: Jul 2011 Location: Cabot, AR Posts: 2,827 View My Garage	Overlap will act different depending on valve events. If the overlap period on intake valve open isnt very large but the overlap period on the exhaust close is large it can still drive good. The more overlap you put on the intake open side it will drive rougher at slower engine speeds.

02-22-2018, 02:14 PM	#13
Bo White Drives: 2015 Summit White 2SS 1LE Join Date: Feb 2012 Location: Vance Alabama Posts: 8,018	Yes its in the intake centerline and split but thats all in general rule of thumb for the average street guy that I was talking about. __________________ Retired wanna be cylinder head porter 2015 2SS 1LE Clutch reservoir, Vararam DRX, ported TB, TSP 2" headers, MGW shifter Totalled: 2010 1SS Wilkes Performance/Eagle 416 shortblock, TSP custom valvetrain, PRC 260 heads, Edelbrock Pro Flo 102, th400 swap, 8" PTC 5500 stall= 535/435 at the wheels tuned Gen 3 Performance and Dyno 10.97 @ 124 full weight in 3100 DA CamaroFest X