Cam question - 68
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Pro
Joined: May 2006
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From: Kernersville North Carolina
Cam question - 68
Curious if anyone has info on the numbers of an original cam for a 68? I just had my 327HP rebuilt and would like to make sure I get a good combo of cam and carb. The cam they gave me has a ratio of int/exh of 368/398. I can get a 435/460 for $135. I plan to use a Holley 650cfm mech w/ elect choke. I want a sporty engine with good lowend power.
I want to take those 5.0's and civics off the line!
Thanks!
I want to take those 5.0's and civics off the line!
Thanks!
Thread Starter
Pro
Joined: May 2006
Posts: 576
Likes: 0
From: Kernersville North Carolina
Is there a simple explanation for what the numbers mean?
My current cam:
lift 368
exhaust 398
duration intake 184/194
duration exhaust 258/268
I want to make sure I have 350hp(+)
Thanks!
My current cam:
lift 368
exhaust 398
duration intake 184/194
duration exhaust 258/268
I want to make sure I have 350hp(+)
Thanks!
Le Mans Master
Joined: Sep 2001
Posts: 7,739
Likes: 630
From: Unreconstructed, South Carolina
Originally Posted by bwellisley
Is there a simple explanation for what the numbers mean?
My current cam:
lift 368
exhaust 398
duration intake 184/194
duration exhaust 258/268
I want to make sure I have 350hp(+)
Thanks!
My current cam:
lift 368
exhaust 398
duration intake 184/194
duration exhaust 258/268
I want to make sure I have 350hp(+)
Thanks!
-edit- also same as Melling P/N 229-2199 ... also smallest Melling markets.
Last edited by jackson; Jun 13, 2006 at 05:21 PM.
Le Mans Master
Joined: Sep 2001
Posts: 7,739
Likes: 630
From: Unreconstructed, South Carolina
Need much more info for reliable cam recommendation
Also ... to make a cam recommendation ... anyone who might offer any reliable help will need to know a lot about your REBUILT 327.
What heads? What valve sizes? What pistons? Has block been decked? What is compression ratio? What is your rear gear ratio? What trans? auto & does it have stock stall torque convertor or 3spd man or 4spd man?
-edit- Speed-Pro makes a replacement cam for 327 w/350 horsepower replaces GM P/N 3863151 ... it is SP P/N CS179R ... specs: 0.050" dur 222*I/222*E ... SAE dur 290*I/290*E ... valve lift .447"I/.447"E ... overlap 78*... has a published power range 2200-5200rpm with "good" idle. Melling's equivalent is P/N 229-1713. That is WAY more cam than that POS the builder handed you.
What heads? What valve sizes? What pistons? Has block been decked? What is compression ratio? What is your rear gear ratio? What trans? auto & does it have stock stall torque convertor or 3spd man or 4spd man?
-edit- Speed-Pro makes a replacement cam for 327 w/350 horsepower replaces GM P/N 3863151 ... it is SP P/N CS179R ... specs: 0.050" dur 222*I/222*E ... SAE dur 290*I/290*E ... valve lift .447"I/.447"E ... overlap 78*... has a published power range 2200-5200rpm with "good" idle. Melling's equivalent is P/N 229-1713. That is WAY more cam than that POS the builder handed you.
Last edited by jackson; Jun 13, 2006 at 06:02 PM.
Thread Starter
Pro
Joined: May 2006
Posts: 576
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From: Kernersville North Carolina
not sure on all parts yet
it's to be a 327HP / 350hp engine, but is not #'s match for the 68, but correct engine for car, so I've been told, I have not verified this yet, can anyone here??? thanks!
4 bolt main
been bored .060
correct dbl heads
4spd muncie 20... I think
engine #'s
block: 25GM 3970010
date codes (?): 1 C120 TDN
there were many other letters and numbers on the block as well...?
head #'s (for 1, the other is currently masked for painting)
GM7 3782461 F95 13
Edellbrock TorquerII intake
it's to be a 327HP / 350hp engine, but is not #'s match for the 68, but correct engine for car, so I've been told, I have not verified this yet, can anyone here??? thanks!
4 bolt main
been bored .060
correct dbl heads
4spd muncie 20... I think
engine #'s
block: 25GM 3970010
date codes (?): 1 C120 TDN
there were many other letters and numbers on the block as well...?
head #'s (for 1, the other is currently masked for painting)
GM7 3782461 F95 13
Edellbrock TorquerII intake
Last edited by bwellisley; Jun 16, 2006 at 11:51 PM.
Le Mans Master
Joined: Sep 2001
Posts: 7,739
Likes: 630
From: Unreconstructed, South Carolina
Originally Posted by bwellisley
not sure on all parts yet
it's to be a 327HP / 350hp engine, but is not #'s match for the 68, but correct engine for car, so I've been told, I have not verified this yet, can anyone here??? thanks!
4 bolt main
been bored .060
correct dbl heads
4spd muncie 20... I think
engine #'s
block: 25GM 3970010
date codes (?): 1 C120 TDN
there were many other letters and numbers on the block as well...?
head #'s (for 1, the other is currently masked for painting)
GM7 2782461 F95 13
Edellbrock TorquerII intake
it's to be a 327HP / 350hp engine, but is not #'s match for the 68, but correct engine for car, so I've been told, I have not verified this yet, can anyone here??? thanks!
4 bolt main
been bored .060
correct dbl heads
4spd muncie 20... I think
engine #'s
block: 25GM 3970010
date codes (?): 1 C120 TDN
there were many other letters and numbers on the block as well...?
head #'s (for 1, the other is currently masked for painting)
GM7 2782461 F95 13
Edellbrock TorquerII intake
Do you have a head off motor so that you can look at piston type & measure how far down in hole it is? And can measure diameter of both an intake & an exhaust valve?
Has the block been decked / milled? ... those flat surfaces that the heads lays on?
Have the 461 heads been surfaced / milled ... those flat surfaces that lay on the block?
The builder should be able to tell if anything has been milled/decked/sufaced ...and HOW MUCH was taken off?
Can the builder tell us piston manufacturer & what their part number is? Are they flattops or domed popups? ... how many valve reliefs if any?
With all that info, we can calculate rather closely what the compression ratio is NOW. Once CR is known, a much better evaluation is possible.
