weber/48 idf camshaft recommendations

I am in the process of building a new motor and was hoping someone with weber knowledge could recommend a good street performance/hydraulic cam for this motor. A lot of local street cruising with the occasional highway blast.

This is a 347 stroker, 48 IDF webers, 10-1 compression, Edelbrock performer RPM heads, 4 speed car and 3.80 rear gears.

This is the specs on the current cam, let me know your feelings on this one. Thanks in advance for any help, Carl.

<TABLE cellSpacing=0 cellPadding=0 width="100%" border=0><TBODY><TR onmouseover="this.style.backgroundColor='#f5f5f5';" style="BACKGROUND-COLOR: #ffffff" onmouseout="this.style.backgroundColor='#FFFFFF'"><TD class=overview-c1 width="25%">Cam Style:</TD><TD class=overview-c2 width="75%">Hydraulic flat tappet</TD></TR><TR onmouseover="this.style.backgroundColor='#f5f5f5';" style="BACKGROUND-COLOR: #ffffff" onmouseout="this.style.backgroundColor='#FFFFFF'"><TD class=overview-c1 width="25%">Basic Operating RPM Range:</TD><TD class=overview-c2 width="75%">1,500-4,000</TD></TR><TR onmouseover="this.style.backgroundColor='#f5f5f5';" style="BACKGROUND-COLOR: #ffffff" onmouseout="this.style.backgroundColor='#FFFFFF'"><TD class=overview-c1 width="25%">Intake Duration at 050 inch Lift:</TD><TD class=overview-c2 width="75%">204</TD></TR><TR onmouseover="this.style.backgroundColor='#f5f5f5';" style="BACKGROUND-COLOR: #ffffff" onmouseout="this.style.backgroundColor='#FFFFFF'"><TD class=overview-c1 width="25%">Exhaust Duration at 050 inch Lift:</TD><TD class=overview-c2 width="75%">214</TD></TR><TR onmouseover="this.style.backgroundColor='#f5f5f5';" style="BACKGROUND-COLOR: #f5f5f5" onmouseout="this.style.backgroundColor='#FFFFFF'"><TD class=overview-c1 width="25%">Duration at 050 inch Lift:</TD><TD class=overview-c2 width="75%">204 int./214 exh.</TD></TR><TR onmouseover="this.style.backgroundColor='#f5f5f5';" style="BACKGROUND-COLOR: #ffffff" onmouseout="this.style.backgroundColor='#FFFFFF'"><TD class=overview-c1 width="25%">Advertised Intake Duration:</TD><TD class=overview-c2 width="75%">262</TD></TR><TR onmouseover="this.style.backgroundColor='#f5f5f5';" style="BACKGROUND-COLOR: #ffffff" onmouseout="this.style.backgroundColor='#FFFFFF'"><TD class=overview-c1 width="25%">Advertised Exhaust Duration:</TD><TD class=overview-c2 width="75%">272</TD></TR><TR onmouseover="this.style.backgroundColor='#f5f5f5';" style="BACKGROUND-COLOR: #ffffff" onmouseout="this.style.backgroundColor='#FFFFFF'"><TD class=overview-c1 width="25%">Advertised Duration:</TD><TD class=overview-c2 width="75%">262 int./272 exh.</TD></TR><TR onmouseover="this.style.backgroundColor='#f5f5f5';" style="BACKGROUND-COLOR: #ffffff" onmouseout="this.style.backgroundColor='#FFFFFF'"><TD class=overview-c1 width="25%">Intake Valve Lift with Factory Rocker Arm Ratio:</TD><TD class=overview-c2 width="75%">0.448 in.</TD></TR><TR onmouseover="this.style.backgroundColor='#f5f5f5';" style="BACKGROUND-COLOR: #ffffff" onmouseout="this.style.backgroundColor='#FFFFFF'"><TD class=overview-c1 width="25%">Exhaust Valve Lift with Factory Rocker Arm Ratio:</TD><TD class=overview-c2 width="75%">0.472 in.</TD></TR><TR onmouseover="this.style.backgroundColor='#f5f5f5';" style="BACKGROUND-COLOR: #ffffff" onmouseout="this.style.backgroundColor='#FFFFFF'"><TD class=overview-c1 width="25%">Valve Lift with Factory Rocker Arm Ratio:</TD><TD class=overview-c2 width="75%">0.448 int./0.472 exh. lift</TD></TR><TR onmouseover="this.style.backgroundColor='#f5f5f5';" style="BACKGROUND-COLOR: #ffffff" onmouseout="this.style.backgroundColor='#FFFFFF'"><TD class=overview-c1 width="25%">Lobe Separation (degrees):</TD><TD class=overview-c2 width="75%">112</TD></TR></TBODY></TABLE>
 
Webers like high lift and short duration. Why not use a hydraulic roller cam? Rollrs don't require break-in like flat tappet cams
 

Randy V

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Carl - Inglese (now owned by Comp Cams) has two different hydraulic roller designs made to work specifically with Webers. I have the hotter of their two designs and my 331 put out 414HP and 430TQ.
If interested - I can find links..
 
Thanks for the replies. I really don't have the cake to do a roller conversion right now. Hoping someone who used a hydraulic flat tappet would pipe in.
 
I think what you have will be fine. It doesn't look like the cam will have a lot of overlap. That is the killer. It actually looks pretty mild. I have ran webers for years with bigger sticks and I haven't had problems with reversion.
 
I've heard good things about the Comp Cams XE274H-10 grind.

Gross lift .520 / .523
Dur@ .006 274 /286
Dur@ .050 230 /236
lobe seperation 110.0

I think it would work well with your 347 / webers
 

Randy V

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112 degrees sounds pretty good but maybe still a little too close.

Rollers are expensive only until you replace a couple of flat tappet cams, oil pumps, etc when they burn up on you.. Make sure you use a couple bottles of Zinc additive in your oil and low pressure valve springs for break-in.

Here's the Info / specs on the two cams - Notice the lobe Sep at 115 degrees;

DESCRIPTION:
Ford Sml Blk 289/302 FO - Inglese Cam Hydraulic Roller Series by COMP Cams®

Inglese™ Weber carburetors offer outstanding performance and throttle response, as well as an incredible underhood appearance. But until now no manufacturer had created camshafts designed specifically to optimize this classic high performance induction system. The new Inglese™ Weber Performance Camshafts by COMP Cams® are designed to enhance the power and drivability of these systems; Inglese™ having worked closely with the COMP Cams® engineering staff to create the most advanced camshaft designs possible. As a result, Inglese™ announces the creation of 16 hydraulic roller cams for Ford, Chevrolet and Chrysler engines.

The secret behind these camshafts is the strong vacuum and signal they create; key ingredients to delivering peak uncompromised Weber performance. While most camshafts are designed for plenum-type 4-barrel carbs or electronic fuel injection, the Inglese™ Weber Performance Camshafts by COMP Cams® were designed from a “clean sheet of paper” for the best performance and drivability possible. The new Inglese™ Weber Performance Camshafts by COMP Cams® are offered in two performance levels for each engine platform, including four popular Ford engines, Small and Big Block Chevrolet, as well as Small Block Chrysler engines.

SBF
----------------------- Dur @050 Lift w/1.6:1 Lobe Sep
31-490-8 272EHR15.... 216 218.... 0.566 0.555 115°
31-491-8 272EHR15.... 222 224.... 0.571 0.565 115°
---------------

When we Dynoed my engine it was the first one they had ever done with Webers that didn't have a lot of fuel reversion (there was none), spitting, popping..
I think the numbers that my engine made show that the combination works well.
My purpose for the car/engine is to have a well mannered and docile street vehicle that I actually enjoy driving. I have access to racecars for that other side of me that want's something totally boisterous and obnoxious to drive.. :)
 
hi men, one of my things is developing a Daimler 2.5 ltr cam for use with 4x 36 dcnv webers. there are many restrictions in the design of the mtr., one being the physical size of the camshaft. so what i have is a .390 "valve lift as compared to a std. .295". not much i know compared to yank stuff, but this was designed with spring pressures of 55lb seated and 112lb at full lift. of .295" STD. and fairly light cam train gear operating inclined valves in a true hemi based on the bonneville 650 twin. the combustion chamber is big and open with a domed piston and takes over 42 deg advance with std. ign setups.( thought to be the bees knees is 1956, not so now eh. )
any thoughts or personal experiences with weber / cam combos would be appreciated and also chamber reshaping / i suppose this should be directed to a chrysler site, but where do even start looking for one that specialises to this degree??? regards to all out ther in the big world. steve. PS on Fri. this week i'm going to see the guys with their GT40s at the Southern Festival Of Speed in Chrischurch. hope to see some action
 
Hi Randy

As you probably know I have a standard 5.0 EFI converted to run 44 IDF webers.
Will this cam from inglese fit and if not what changes need to be made?
 

Randy V

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Dave - You May get lucky in the piston to valve clearance. Or you could potentially use 1.5:1 rocker arms to reduce the net lift without tearing the engine totally apart. You would have to pitch your stock valve springs and pushrods for sure.

My thoughts are that you'd likely have to either have the pistons notched deeper or replaced..
 
Hi Carl,

Its not a hyd grind like you asked about, but it made 385 hp in my 289, and pulls hard between 3000-6000 rpm.

It has great driveability and throttle response.

Its similar to your posted grind.

See the "C30Z"

http://www.holmanmoody.com/parts1.html

Solids are not a big deal to run the valves either.

Where in MA. are you?

When the roads clear off in the spring your welcome to come and check it out first hand.

Cheers,
S
 
Thanks for the input guys. I broke open the piggy bank and ordered the roller cam kit from Comp Cams. Scott, I am in Hanson, Ma. and would really like to check out the gt40 when the weather clears. Thanks.
 
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