Couple of questions about new 68 Camaro combo

68Mustang · 04-17-2007, 04:28 PM

Just bought a 68 camaro off a friend. it is his old bracket car, he bought a dragster.
I am going to build a 350 for this car, and even though it is a bracket car i would like some of your suggestions, i am amazed at what class racers can do with the rules you have to run under., and how hard the cars leave
I am going to run
10:1 compression
RPM intake
Edelbrock RPM heads
1 5/8 headers
going run either a 750HP or 950HP
will be running 28x10 slicks
will be getting a 8" convertor
I am looking to shift around 6200/6300 1/8th mile only

my questions are:
what gear should i run
what duration and lsa cam should i run thinking either hydraulic or solid flat tappet no rollers
what convertor and how much stall

was kinda trying to approach this car like a I/J car. I see I/J novas running 7.20/7.30 in the 1/8th with rather impressive wheelstands on the internet all the time. would like this car to leave/run like that
Any suggestions or ideas appreciated.

greg fulk · 04-18-2007, 02:37 AM

My 2 cents....you need 1& 1/2 stepped to 1&5/8 headers..call ATI for a converter (your running a powerglide right?) you'll need at leats 250 deration @ .050 (if it were me run solid lifter their cheaper! ) find one that has .450 lift this will work good and give ya piston clearance...and I would put a 4.88 gear in it with a 28" tire. P.S. if your runnig a glide you'll need at least a 1.94 low gear...2.08 would be better. Good Luck!!

novamoation

Dave Goob Cook · 04-18-2007, 11:40 AM

Run the 750 carb, 1 5/8" headers are fine, work with the collector length.
I'd look for a camshaft that is .550" + on the lift, duration @ .050" in the high 23x range on the intake side, high 24x range on the exhaust side, with a LSA of 110-112 degrees, to help with the low compression.

3-speed automatic?
Give it 5000-5200 + stall, you might be steep on the rear gear at 4.88's, but worth a try for 1/8th mile only, but I think consistency will suffer.
If you're going to try a pukeglitch, go up on the stall some more, like 5500+.

"Despite the high cost of living, it remains popular"
Dave Cook
C375

68Mustang · 04-19-2007, 11:47 AM

How about the comp 282S it is 236/236 @50 495/495 110ls.
They say it is easy on springs.
If i would run this cam it has 4 degrees already ground into it should i advance it 4 more degrees to get it to leave harder.
With this cam i was thinking of shifting @6200 and getting a 8"ATI set up @5000.
What do you think it would run in a 3200 lb w/river and a 4.88 with 28x10.5 slicks

greg fulk · 04-19-2007, 12:18 PM

fast enough to need a roll bar! lol Dad's car (67 camaro) with less gear & less cam will run 7.70's . it weights 3380 with him in it.

novamoation

68Mustang · 04-19-2007, 12:43 PM

what is your dad's combo.
is the 282S a good cam or would one with a split pattern work better, or one with a tighter lobe seperation.
i see Goob says to stay around 110/112 but that goes against what i have heard. not saying you are wrong, i don't know just wondering if someone could explained it to me.

Dave Goob Cook · 04-19-2007, 12:56 PM

I like split patterns on most all 23 degree SBC stuff.
The exhaust side usually needs help.

LSA is an overcomplicated term for overlap, the wide (bigger number) LSA is less valve overlap, helping keep the dynamic compression up.
I run a 106 LSA in my 15 to 1 stuff, narrower, higher power band.
If I were 10 to 1, I'd run 110 to 114 on the LSA.......

That isn't a bad looking cam you listed, but I'd at least run 1.6 rockers with it, your heads will support up to near .600" lift.

None of that has anything to do with the Intake Center Line method of degreeing the camshaft in.

I use the valve event timing specs on the card to determine if I'm installed straight up or advanced or retarded. The ICL method is quick and dirty, and depends on the cam being ground correctly, when I use the valve event timing method, I verify that the cam is ground correctly, or if not, I can split any minor differences in the valve event timing.

With that little cam you have listed, I'd run it retarded or straight up for a footbrake car. When you run past 5000 or so with the stall speed, there is no sense in enhancing the low end by advancing the cam.

You should be able to tweak that combo into the high 7's easily enough, and I don't think we need the roll bar down to 7.35 now days.

"Despite the high cost of living, it remains popular"
Dave Cook
C375

Paul Merolla · 04-19-2007, 01:22 PM

I've got a 406 in my '68 with the RPM intake, 750 mech. sec. Holley, unported iron heads - I used the Comp XE284 hydraulic....240/246 @ .050, .507/.510 lift. It revs cleanly to 7000 and with a stock convertor in the 700R4 and 4.11 gears it runs 8.20s in the eighth (on Nitto street tires). I really like that cam - no shortage of grunt from 2000 on up. For what it's worth.

Brian Holcombe · 04-20-2007, 01:14 AM

[IMaGe]http://i27.photobucket.com/albums/c181/SpeedyGoomba/blaunch.jpg[/IMaGe]

I fit all of those requirements and have gone 7.01 in the 1/8 11.15 in the 1/4

4.56 gear

converter flashes to 5000 (ATI 8")

108 LSA solid flat tappet cam, 242/248 duration at .050" and under .500" lift

greg fulk · 04-20-2007, 02:10 AM

Dad's combo is OLD!!! it's a 280 magnum in strait up 462 "iron" heads 2.02 1.60 with 1.6 rockers Victor jr a plain old 750 duble pumper with a 9" 4500 converter with 4.11 gears & 28 X 9 slicks. 1.68 60' 7.78 @ 87mph

novamoation

04-17-2007, 04:28 PM	#1
68Mustang Junior Member Join Date: May 2005 Location: Virginia Posts: 47 Likes: 0 Liked 2 Times in 2 Posts	Couple of questions about new 68 Camaro combo Just bought a 68 camaro off a friend. it is his old bracket car, he bought a dragster. I am going to build a 350 for this car, and even though it is a bracket car i would like some of your suggestions, i am amazed at what class racers can do with the rules you have to run under., and how hard the cars leave I am going to run 10:1 compression RPM intake Edelbrock RPM heads 1 5/8 headers going run either a 750HP or 950HP will be running 28x10 slicks will be getting a 8" convertor I am looking to shift around 6200/6300 1/8th mile only my questions are: what gear should i run what duration and lsa cam should i run thinking either hydraulic or solid flat tappet no rollers what convertor and how much stall was kinda trying to approach this car like a I/J car. I see I/J novas running 7.20/7.30 in the 1/8th with rather impressive wheelstands on the internet all the time. would like this car to leave/run like that Any suggestions or ideas appreciated.

04-18-2007, 02:37 AM	#2
greg fulk VIP Member Join Date: Jan 2003 Location: jackson Posts: 1,165 Likes: 0 Liked 5 Times in 3 Posts	My 2 cents....you need 1& 1/2 stepped to 1&5/8 headers..call ATI for a converter (your running a powerglide right?) you'll need at leats 250 deration @ .050 (if it were me run solid lifter their cheaper! ) find one that has .450 lift this will work good and give ya piston clearance...and I would put a 4.88 gear in it with a 28" tire. P.S. if your runnig a glide you'll need at least a 1.94 low gear...2.08 would be better. Good Luck!! novamoation __________________ Greg Fulk 308 308X P/SA "ALL AMERICAN"

04-18-2007, 11:40 AM	#3
Dave Goob Cook Member Join Date: Dec 2006 Location: Indy Posts: 422 Likes: 0 Liked 0 Times in 0 Posts	Run the 750 carb, 1 5/8" headers are fine, work with the collector length. I'd look for a camshaft that is .550" + on the lift, duration @ .050" in the high 23x range on the intake side, high 24x range on the exhaust side, with a LSA of 110-112 degrees, to help with the low compression. 3-speed automatic? Give it 5000-5200 + stall, you might be steep on the rear gear at 4.88's, but worth a try for 1/8th mile only, but I think consistency will suffer. If you're going to try a pukeglitch, go up on the stall some more, like 5500+. "Despite the high cost of living, it remains popular" Dave Cook C375 __________________ "Despite the high cost of living, it remains popular." Dave Cook NHRA N375

04-19-2007, 12:18 PM	#5
greg fulk VIP Member Join Date: Jan 2003 Location: jackson Posts: 1,165 Likes: 0 Liked 5 Times in 3 Posts	fast enough to need a roll bar! lol Dad's car (67 camaro) with less gear & less cam will run 7.70's . it weights 3380 with him in it. novamoation __________________ Greg Fulk 308 308X P/SA "ALL AMERICAN"

04-19-2007, 12:56 PM	#7
Dave Goob Cook Member Join Date: Dec 2006 Location: Indy Posts: 422 Likes: 0 Liked 0 Times in 0 Posts	I like split patterns on most all 23 degree SBC stuff. The exhaust side usually needs help. LSA is an overcomplicated term for overlap, the wide (bigger number) LSA is less valve overlap, helping keep the dynamic compression up. I run a 106 LSA in my 15 to 1 stuff, narrower, higher power band. If I were 10 to 1, I'd run 110 to 114 on the LSA....... That isn't a bad looking cam you listed, but I'd at least run 1.6 rockers with it, your heads will support up to near .600" lift. None of that has anything to do with the Intake Center Line method of degreeing the camshaft in. I use the valve event timing specs on the card to determine if I'm installed straight up or advanced or retarded. The ICL method is quick and dirty, and depends on the cam being ground correctly, when I use the valve event timing method, I verify that the cam is ground correctly, or if not, I can split any minor differences in the valve event timing. With that little cam you have listed, I'd run it retarded or straight up for a footbrake car. When you run past 5000 or so with the stall speed, there is no sense in enhancing the low end by advancing the cam. You should be able to tweak that combo into the high 7's easily enough, and I don't think we need the roll bar down to 7.35 now days. "Despite the high cost of living, it remains popular" Dave Cook C375 __________________ "Despite the high cost of living, it remains popular." Dave Cook NHRA N375

04-19-2007, 11:47 AM	#4
68Mustang Junior Member Join Date: May 2005 Location: Virginia Posts: 47 Likes: 0 Liked 2 Times in 2 Posts	How about the comp 282S it is 236/236 @50 495/495 110ls. They say it is easy on springs. If i would run this cam it has 4 degrees already ground into it should i advance it 4 more degrees to get it to leave harder. With this cam i was thinking of shifting @6200 and getting a 8"ATI set up @5000. What do you think it would run in a 3200 lb w/river and a 4.88 with 28x10.5 slicks

04-19-2007, 12:43 PM	#6
68Mustang Junior Member Join Date: May 2005 Location: Virginia Posts: 47 Likes: 0 Liked 2 Times in 2 Posts	what is your dad's combo. is the 282S a good cam or would one with a split pattern work better, or one with a tighter lobe seperation. i see Goob says to stay around 110/112 but that goes against what i have heard. not saying you are wrong, i don't know just wondering if someone could explained it to me.

04-19-2007, 01:22 PM	#8
Paul Merolla Senior Member Join Date: Dec 2001 Location: Papillion, NE Posts: 596 Likes: 194 Liked 232 Times in 57 Posts	I've got a 406 in my '68 with the RPM intake, 750 mech. sec. Holley, unported iron heads - I used the Comp XE284 hydraulic....240/246 @ .050, .507/.510 lift. It revs cleanly to 7000 and with a stock convertor in the 700R4 and 4.11 gears it runs 8.20s in the eighth (on Nitto street tires). I really like that cam - no shortage of grunt from 2000 on up. For what it's worth.

04-20-2007, 01:14 AM	#9
Brian Holcombe Junior Member Join Date: Feb 2004 Location: Hamilton NJ Posts: 68 Likes: 0 Liked 0 Times in 0 Posts	[IMaGe]http://i27.photobucket.com/albums/c181/SpeedyGoomba/blaunch.jpg[/IMaGe] I fit all of those requirements and have gone 7.01 in the 1/8 11.15 in the 1/4 4.56 gear converter flashes to 5000 (ATI 8") 108 LSA solid flat tappet cam, 242/248 duration at .050" and under .500" lift

04-20-2007, 02:10 AM	#10
greg fulk VIP Member Join Date: Jan 2003 Location: jackson Posts: 1,165 Likes: 0 Liked 5 Times in 3 Posts	Dad's combo is OLD!!! it's a 280 magnum in strait up 462 "iron" heads 2.02 1.60 with 1.6 rockers Victor jr a plain old 750 duble pumper with a 9" 4500 converter with 4.11 gears & 28 X 9 slicks. 1.68 60' 7.78 @ 87mph novamoation __________________ Greg Fulk 308 308X P/SA "ALL AMERICAN"