WOW!!!!! new cam heads - The 1947 - Present Chevrolet & GMC Truck Message Board Network

bigjimzlll · 02-09-2003, 07:05 PM

WOW..I switched from a comp 268H to a comp cs268-s10 and had my heads(186) re worked..It used to stop pulling at around 5.000rpm...now it pulls like mad all the way tp 6000..better throttle response..and wicked long powerful smokey burnouts..and this is with out any N20..I cant wait for the track to open

Jim

Dean23 · 02-09-2003, 07:08 PM

Sounds alright, cant wait to get mine to the driving stage, still in the body work phase though.

GMC71k20 · 02-09-2003, 07:08 PM

lets see some smokey burnout pics

70c10 · 02-09-2003, 09:21 PM

Congrats Jim!, Sounds like solid cams are a blast. I didn't get mine installed this weekend. Next Saturday I hope.

68 Suburban · 02-09-2003, 10:11 PM

What is the difference between those two cams??? Thanks

bigjimzlll · 02-09-2003, 10:12 PM

yea they are a blast...make sure to adjust the rockers after the cam break in(hot) they do change a little..I just cant believe the difference..I dont know if the cam or the heads(or combo of both) made the big difference..I still have my restrictive 2" exhaust on it..the flowmasters will go on tomorrow if I have time.

bigjimzlll · 02-09-2003, 10:41 PM

heres the 268H(hydrolic)
Part Number 12-210-2
Engine 1955-present Chevrolet
262ci-400ci
8cyl.

Description

--------------------------------------------------------------------------------

Intake Exhaust
Valve Adjustment 0 0
Gross Valve Lift 0.454 0.454
Duration At 0.006 Tappet Lift 268 268

--------------------------------------------------------------------------------

Valve Timing At 0.006
Open Close
Intake 28 60
Exhaust 68 20

--------------------------------------------------------------------------------

These Specs Are For The Cam Installed At 106 Intake CL
Intake Exhaust
Duration At 0.05 218 218
Lobe Lift 0.3026 0.3026
Lobe Separation 110

--------------------------------------------------------------------------------

Recommended Valve Springs 981-16
hheres the soild lifter....

Part Number 12-676-4
Engine 1955-present Chevrolet
262ci-400ci
8cyl.
Grind Number CS XS268S-10
Description

--------------------------------------------------------------------------------

Intake Exhaust
Valve Adjustment 0.016 0.016
Gross Valve Lift 0.488 0.501
Duration At 0.015 Tappet Lift 268 274

--------------------------------------------------------------------------------

Valve Timing At 0.015
Open Close
Intake 28 60
Exhaust 71 23

--------------------------------------------------------------------------------

These Specs Are For The Cam Installed At 106 Intake CL
Intake Exhaust
Duration At 0.05 230 236
Lobe Lift 0.325 0.334
Lobe Separation 110

--------------------------------------------------------------------------------

Recommended Valve Springs 981-16

neonlarry · 02-09-2003, 10:42 PM

Now, all you need to do is fix your signature. lol
Sounds like the modifications were well worth it. It seemed fast before when I rode in it, I guess if I am up there I will have to come by and visit you again.

nate68 · 02-09-2003, 10:43 PM

the redding track is gonna start having grudge drags like twice a month this upcoming season. they start in march
www.reddingdragstrip.net
i'm looking to take my truck at least once this year. time's won't look great at least until i get a posi. 406+non posi=no traction

Tracy Focht · 02-10-2003, 03:34 PM

Sounds good...I know the cam helped, but the heads were sure adding to that new combo. Glad it brought the smile back.

02-09-2003, 07:05 PM	#1
bigjimzlll Senior Member Join Date: Dec 2001 Location: Redding,CA...USA Posts: 4,736	WOW!!!!! new cam heads WOW..I switched from a comp 268H to a comp cs268-s10 and had my heads(186) re worked..It used to stop pulling at around 5.000rpm...now it pulls like mad all the way tp 6000..better throttle response..and wicked long powerful smokey burnouts..and this is with out any N20..I cant wait for the track to open Jim __________________ It's called "drag racing" if they called it "tic..tic..WHAM!..BANG! F*&K!!!", they'd have to keep the magazines under the counter with the other men's publications click the clicky to join the site.... http://67-72chevytrucks.com/vboard/payments.php 67 lwb..first hotrod in 25 years..540 best ET is 9.45 @ 141.44 Anderson,CA

02-09-2003, 07:08 PM	#2
Dean23 68cst_ss490 Join Date: May 2001 Location: edmonton,canada Posts: 1,363	Sounds alright, cant wait to get mine to the driving stage, still in the body work phase though. __________________ Dean edmonton,canada a winter wonderland 2005 Chevrolet Avalanche LT cold air intake, performance exhaust, Comp cams cam, jba shorty ceramic headers. http://www.cardomain.com/ride/3090973

02-09-2003, 09:21 PM	#4
70c10 67-72 Addict! Join Date: Feb 2002 Location: The TAX State! Posts: 7,856	Congrats Jim!, Sounds like solid cams are a blast. I didn't get mine installed this weekend. Next Saturday I hope. __________________ Jim 1970 C/10 Fleetside w/Ghost Flames Lowered 4.5" front and 4" rear (Raked) 355/350 Turbo w/shift kit 10" Redneck Performance Verter w/2500 stall Hooker Super Comps part#2808-1 Performer RPM Air-Gap 12 Bolt w/3:73 gears- Eaton Posi Comp Cams XE262 with 1.6 Crane Energizers, Road Demon 625 and Brodix IK 180 heads

02-09-2003, 10:12 PM	#6
bigjimzlll Senior Member Join Date: Dec 2001 Location: Redding,CA...USA Posts: 4,736	yea they are a blast...make sure to adjust the rockers after the cam break in(hot) they do change a little..I just cant believe the difference..I dont know if the cam or the heads(or combo of both) made the big difference..I still have my restrictive 2" exhaust on it..the flowmasters will go on tomorrow if I have time. __________________ It's called "drag racing" if they called it "tic..tic..WHAM!..BANG! F*&K!!!", they'd have to keep the magazines under the counter with the other men's publications click the clicky to join the site.... http://67-72chevytrucks.com/vboard/payments.php 67 lwb..first hotrod in 25 years..540 best ET is 9.45 @ 141.44 Anderson,CA

02-09-2003, 10:41 PM	#7
bigjimzlll Senior Member Join Date: Dec 2001 Location: Redding,CA...USA Posts: 4,736	heres the 268H(hydrolic) Part Number 12-210-2 Engine 1955-present Chevrolet 262ci-400ci 8cyl. Description -------------------------------------------------------------------------------- Intake Exhaust Valve Adjustment 0 0 Gross Valve Lift 0.454 0.454 Duration At 0.006 Tappet Lift 268 268 -------------------------------------------------------------------------------- Valve Timing At 0.006 Open Close Intake 28 60 Exhaust 68 20 -------------------------------------------------------------------------------- These Specs Are For The Cam Installed At 106 Intake CL Intake Exhaust Duration At 0.05 218 218 Lobe Lift 0.3026 0.3026 Lobe Separation 110 -------------------------------------------------------------------------------- Recommended Valve Springs 981-16 hheres the soild lifter.... Part Number 12-676-4 Engine 1955-present Chevrolet 262ci-400ci 8cyl. Grind Number CS XS268S-10 Description -------------------------------------------------------------------------------- Intake Exhaust Valve Adjustment 0.016 0.016 Gross Valve Lift 0.488 0.501 Duration At 0.015 Tappet Lift 268 274 -------------------------------------------------------------------------------- Valve Timing At 0.015 Open Close Intake 28 60 Exhaust 71 23 -------------------------------------------------------------------------------- These Specs Are For The Cam Installed At 106 Intake CL Intake Exhaust Duration At 0.05 230 236 Lobe Lift 0.325 0.334 Lobe Separation 110 -------------------------------------------------------------------------------- Recommended Valve Springs 981-16 __________________ It's called "drag racing" if they called it "tic..tic..WHAM!..BANG! F*&K!!!", they'd have to keep the magazines under the counter with the other men's publications click the clicky to join the site.... http://67-72chevytrucks.com/vboard/payments.php 67 lwb..first hotrod in 25 years..540 best ET is 9.45 @ 141.44 Anderson,CA

02-09-2003, 07:08 PM	#3
GMC71k20 Registered User Join Date: Aug 2002 Location: mass Posts: 1,277	lets see some smokey burnout pics

02-09-2003, 10:11 PM	#5
68 Suburban Registered User Join Date: Oct 2000 Location: From Chicago, Live in Phoenix, AZ Posts: 6,802	What is the difference between those two cams??? Thanks

02-09-2003, 10:42 PM	#8
neonlarry Registered User Join Date: Feb 2002 Location: Vacaville, CA Posts: 2,745	Now, all you need to do is fix your signature. lol Sounds like the modifications were well worth it. It seemed fast before when I rode in it, I guess if I am up there I will have to come by and visit you again. __________________ 70 C/10 Light Red 350/TH350, HEI, Duals w/40 series Flows, 91 seat, LED taillights 99 Pontiac S/C GTP, SLP Ram Air hood, GMPP Konis & springs 95 Neon ACR, MP PCM, AFX UDP, 3.0 CAI

02-09-2003, 10:43 PM	#9
nate68 Registered User Join Date: Jan 2000 Location: ca Posts: 1,110	the redding track is gonna start having grudge drags like twice a month this upcoming season. they start in march www.reddingdragstrip.net i'm looking to take my truck at least once this year. time's won't look great at least until i get a posi. 406+non posi=no traction __________________ 68 short step, 406/700r4, 9" w/discs.

02-10-2003, 03:34 PM	#10
Tracy Focht Registered User Join Date: Dec 1999 Location: Stillwater, OK 74075 Posts: 2,936	Sounds good...I know the cam helped, but the heads were sure adding to that new combo. Glad it brought the smile back.



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