What should I expect with this cam
Thread Starter
Le Mans Master
Joined: May 2003
Posts: 5,642
Likes: 1
What should I expect with this cam
Part Number 12-417-8
Engine 1955-1998 Chevrolet
262ci-400ci
8cyl.
Grind Number CS XM 270HR-12
Description
--------------------------------------------------------------------------------
Intake Exhaust
Valve Adjustment 0 0
Gross Valve Lift 0.495 0.503
Duration At 0.006 Tappet Lift 270 276
--------------------------------------------------------------------------------
Valve Timing At 0.006
Open Close
Intake 25 65
Exhaust 72 24
--------------------------------------------------------------------------------
These Specs Are For The Cam Installed At 110 Intake CL
Intake Exhaust
Duration At 0.05 218 224
Lobe Lift 0.33 0.335
Lobe Separation 112
--------------------------------------------------------------------------------
Recommended Valve Springs 986-16
it's a comp cam...roller set up 383 stroker and dart heads.
any thoughts on power range...
Engine 1955-1998 Chevrolet
262ci-400ci
8cyl.
Grind Number CS XM 270HR-12
Description
--------------------------------------------------------------------------------
Intake Exhaust
Valve Adjustment 0 0
Gross Valve Lift 0.495 0.503
Duration At 0.006 Tappet Lift 270 276
--------------------------------------------------------------------------------
Valve Timing At 0.006
Open Close
Intake 25 65
Exhaust 72 24
--------------------------------------------------------------------------------
These Specs Are For The Cam Installed At 110 Intake CL
Intake Exhaust
Duration At 0.05 218 224
Lobe Lift 0.33 0.335
Lobe Separation 112
--------------------------------------------------------------------------------
Recommended Valve Springs 986-16
it's a comp cam...roller set up 383 stroker and dart heads.
any thoughts on power range...
Melting Slicks
Joined: Dec 2001
Posts: 2,025
Likes: 1
From: Billings MT
Re: What should I expect with this cam (munday)
Why so small? What heads are you using? I was pretty happy with the XR288-HR but traded up to a solid roller looking for some more umph...
Tell me a few things and I (and i'm sure others) can get a better basis for a recommendation:
1) Heads
2) Intake / Induction
3) Compression
4) Exhaust System
5) Rear Gear
6) Converter Stall (Where applicable)
7) Planned Usage
That about covers it.
Good Luck!
:cheers:
Tell me a few things and I (and i'm sure others) can get a better basis for a recommendation:
1) Heads
2) Intake / Induction
3) Compression
4) Exhaust System
5) Rear Gear
6) Converter Stall (Where applicable)
7) Planned Usage
That about covers it.
Good Luck!
:cheers:
Thread Starter
Le Mans Master
Joined: May 2003
Posts: 5,642
Likes: 1
Re: What should I expect with this cam (VETDRMS)
roller cam...dart heads..ported polished and matched to intake...10.3-5:1 2500 stall
stock gears as far as i know, th-350.. performer rpm and demon 650 mechanical... blueprinted and balanced engine. dynomax headers and 2 chamber exhaust..clean bends straight back...no h pipe
[Modified by munday, 12:34 AM 5/18/2004]
[Modified by munday, 12:49 AM 5/18/2004]
stock gears as far as i know, th-350.. performer rpm and demon 650 mechanical... blueprinted and balanced engine. dynomax headers and 2 chamber exhaust..clean bends straight back...no h pipe
[Modified by munday, 12:34 AM 5/18/2004]
[Modified by munday, 12:49 AM 5/18/2004]
Melting Slicks
Joined: Dec 2001
Posts: 2,025
Likes: 1
From: Billings MT
Re: What should I expect with this cam (munday)
Sorry my reply took so long. What size heads are the darts (i'm assuming 200?), do you have any flow numbers from the port/polish? With that displacement you can get away with a little more cam, why not something around 230? Would make good midrange and pull pretty strong in the top end. Your going to want to get yoru valve lift to around .550 with those heads. If you want to use it as a driver with plenty of low end grunt and not too many blasts to 6000rpm that cam should work well.
I'm surprised more people haven't chimed in.
I'm surprised more people haven't chimed in.
Pro
Joined: Jan 2004
Posts: 522
Likes: 0
From: Grayslake IL
Re: What should I expect with this cam (VETDRMS)
This is my set-up. I want the 270 roller cam, by the way.
388 stroker, AFR 190 heads, Dynomax 1 5/8" headers, 2.5 in" exhaust, Edelbrock RPM performer intake, Q-Jet, 268 H camshaft, 1.6 Pro Magnum roller rockers, about 10:1 compression. It dynoed 420hp and 440 lb-ft of torque at the flywheel. It's also a 4 speed, no cats, 3.55 rear gears.
388 stroker, AFR 190 heads, Dynomax 1 5/8" headers, 2.5 in" exhaust, Edelbrock RPM performer intake, Q-Jet, 268 H camshaft, 1.6 Pro Magnum roller rockers, about 10:1 compression. It dynoed 420hp and 440 lb-ft of torque at the flywheel. It's also a 4 speed, no cats, 3.55 rear gears.
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Team Owner
Joined: Apr 1999
Posts: 21,953
Likes: 1,445
From: Reno Nevada
2024 C3 of the Year Finalist- Modified
Re: What should I expect with this cam (thevetterisbetter)
Munday - 218 -224 with 112 lc is a mild cam. Your buildup will exceed the above posts dyno numbers because your cam is larger than his in duration and rollers are also good for extra power because of the amount of time that the valve is actually held open.
Your cam is on the upper edge to pass smog testing. Many of the C-4 guys limit their cams to the LPE 219/219 duration and many of them run solid high 11 second quarters.
Like in the other statement you could use more lift. So 1.6 roller rockers are a must. That also adds a couple of degrees of duration.
The car should run great :flag
Your cam is on the upper edge to pass smog testing. Many of the C-4 guys limit their cams to the LPE 219/219 duration and many of them run solid high 11 second quarters.
Like in the other statement you could use more lift. So 1.6 roller rockers are a must. That also adds a couple of degrees of duration.
The car should run great :flag
Team Owner
Joined: Apr 1999
Posts: 21,953
Likes: 1,445
From: Reno Nevada
2024 C3 of the Year Finalist- Modified
Re: What should I expect with this cam (gkull)
I'll run some DD2000 runs for you and post them.
Does anyone know if the forum picture saving works again?
Does anyone know if the forum picture saving works again?
Team Owner
Joined: Apr 1999
Posts: 21,953
Likes: 1,445
From: Reno Nevada
2024 C3 of the Year Finalist- Modified
Re: What should I expect with this cam (munday)
I sent you the dd2000
But it's 435 hp @5500 amd 475 tq @4000.
That's a ruff est. I would say that the RPM intake manifold is much better than DD2000 dual plane choice. Your head flow might be above the custom graph I also installed. The 475 Tq is what will win the races!:)
But it's 435 hp @5500 amd 475 tq @4000.
That's a ruff est. I would say that the RPM intake manifold is much better than DD2000 dual plane choice. Your head flow might be above the custom graph I also installed. The 475 Tq is what will win the races!:)
Thread Starter
Le Mans Master
Joined: May 2003
Posts: 5,642
Likes: 1
Re: What should I expect with this cam (gkull)
I sent you the dd2000
But it's 435 hp @5500 amd 475 tq @4000.
That's a ruff est. I would say that the RPM intake manifold is much better than DD2000 dual plane choice. Your head flow might be above the custom graph I also installed. The 475 Tq is what will win the races!:)
But it's 435 hp @5500 amd 475 tq @4000.
That's a ruff est. I would say that the RPM intake manifold is much better than DD2000 dual plane choice. Your head flow might be above the custom graph I also installed. The 475 Tq is what will win the races!:)
SUUUUUWHEAT!!!
Thread Starter
Le Mans Master
Joined: May 2003
Posts: 5,642
Likes: 1
Re: What should I expect with this cam (munday)
ohh yeah and my heads are the 230 cc heads with the 72 cc chambers..heads are portmatched and all that good stuff...don't know if it helps but it is as smooth as a baby's **** in there.
Le Mans Master
Joined: Dec 2003
Posts: 5,727
Likes: 38
From: Fremont CA
Re: What should I expect with this cam (munday)
This cam is close to the one I'm using in a similar 383 build-up. I plan on 400+HP with my set-up with a smooth enough idle to run the A/C compressor at a 850RPM idle. The cam will make over 400HP if the heads flow well, I'm using Edelbrock Etec 200cc heads with a Super Ram EFI intake. We are still waiting for the heads but the news is they hit the wharehouse last Thursday so it should be running by July/August. 230cc intake ports on a 23degree head are a little large for a 383 in my book! I would go no bigger than 200-210cc and actually the AFR 195s or Pro Action 180cc heads would be my first pick for a 383.
Le Mans Master
Joined: Dec 2003
Posts: 5,727
Likes: 38
From: Fremont CA
Re: What should I expect with this cam (Stoge)
it's a comp cam...
A wiped lobe or two... :jester [/QUOTE]
Pretty tough with a roller cam unless you forget the locking bars! Flat tappet cam guys will have to learn to use GM EOS or Valvoline high zinc content racing oil to keep their Hi-po cams alive. The zinc anti-wear agents are being phased out to protect catalytic convertors in late model cars.
