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Head gasket........ #980827
04/26/11 05:04 AM
04/26/11 05:04 AM
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Posts: 299
Fitchbug, Mass.
WannaRunner Offline OP
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I have a stock 383, Is a EX268 cam a trouble free upgrade? what would be the thinnest head gasket I could use to bring up the compression after installing this cam? without of course smacking the valves.......

Thanks

Re: Head gasket........ [Re: WannaRunner] #980828
04/26/11 12:26 PM
04/26/11 12:26 PM
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JohnRR Offline
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Describe a trouble free upgrade?

What does it have for pistons in it now? What heads do you have?

The XE grinds are known to be noisy because of the fast ramps , using them with stock stamped rockers makes it sound worse.

Re: Head gasket........ [Re: WannaRunner] #980829
04/26/11 02:00 PM
04/26/11 02:00 PM
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MLR426 Offline
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Quote:

I have a stock 383, Is a EX268 cam a trouble free upgrade? what would be the thinnest head gasket I could use to bring up the compression after installing this cam? without of course smacking the valves.......

Thanks




compression ?
John ask the question what pistons? I assume you have stock pistons with stock compression height, the valves wouldn't even be close to hitting with that cam. If you want more compression cut the heads. 20 steel head shim with copper coat. The trouble free part ? when you cut heads to build compression, push rods and adjustable rockers have to be looked at.


logan426

Re: Head gasket........ [Re: JohnRR] #980830
04/26/11 02:51 PM
04/26/11 02:51 PM
Joined: Jan 2008
Posts: 299
Fitchbug, Mass.
WannaRunner Offline OP
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Quote:

Describe a trouble free upgrade?

What does it have for pistons in it now? What heads do you have?

The XE grinds are known to be noisy because of the fast ramps , using them with stock stamped rockers makes it sound worse.





"Describe a trouble free upgrade?"

Is it pretty much plug and play?

"What does it have for pistons in it now?"

Stock.

"What heads do you have?"

Stock 906's

"The XE grinds are known to be noisy because of the fast ramps , using them with stock stamped rockers makes it sound worse"

Any recommendations for a rocker upgrade? a step up from stock is about as much as I'm looking for.

Thanks!

Re: Head gasket........ [Re: MLR426] #980831
04/26/11 02:54 PM
04/26/11 02:54 PM
Joined: Jan 2008
Posts: 299
Fitchbug, Mass.
WannaRunner Offline OP
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WannaRunner  Offline OP
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Quote:

Quote:

I have a stock 383, Is a EX268 cam a trouble free upgrade? what would be the thinnest head gasket I could use to bring up the compression after installing this cam? without of course smacking the valves.......

Thanks




compression ?
John ask the question what pistons? I assume you have stock pistons with stock compression height, the valves wouldn't even be close to hitting with that cam. If you want more compression cut the heads. 20 steel head shim with copper coat. The trouble free part ? when you cut heads to build compression, push rods and adjustable rockers have to be looked at.


logan426




Do you know the thickness for stock head gaskets? my motor is a uncut orginal, I would like to keep like that as long as I can.

Thanks!

Re: Head gasket........ [Re: WannaRunner] #980832
04/26/11 03:21 PM
04/26/11 03:21 PM
Joined: Nov 2004
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Suffolk,VA
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ireland383 Offline
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Stock steel gasket is .020 thick.

Mopar Performance P4286754

Last edited by ireland383; 04/26/11 03:23 PM.
Re: Head gasket........ [Re: WannaRunner] #980833
04/26/11 04:14 PM
04/26/11 04:14 PM
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Junky Offline
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The Comp XE268H cam will work just fine in a stockish 383. Yes, you can hear it tapping away because of the fast ramp lobes, but it's no big deal. I ran the XE262H which is one step down from the 268, this was with stock heads and rockers and steel shim head gaskets. It was a tapper too, but I liked it. I now run a Hughes cam.

What type of exhaust/manifolds/headers, rear gears and transmission will you be running? That will make a difference on which cam is best to run.


2010 Black Challenger SE <> 3.5 V6
Custom Shift Knobs www.flameball.com Check It Out
Re: Head gasket........ [Re: Junky] #980834
04/26/11 06:46 PM
04/26/11 06:46 PM
Joined: Jan 2008
Posts: 299
Fitchbug, Mass.
WannaRunner Offline OP
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Quote:

The Comp XE268H cam will work just fine in a stockish 383. Yes, you can hear it tapping away because of the fast ramp lobes, but it's no big deal. I ran the XE262H which is one step down from the 268, this was with stock heads and rockers and steel shim head gaskets. It was a tapper too, but I liked it. I now run a Hughes cam.

What type of exhaust/manifolds/headers, rear gears and transmission will you be running? That will make a difference on which cam is best to run.




Stock exhaust manifolds, stock 727, (I may go with a trans go kit) 323 gears, edelbrock 1407 carb (750 cfm)

Re: Head gasket........ [Re: ireland383] #980835
04/26/11 06:47 PM
04/26/11 06:47 PM
Joined: Jan 2008
Posts: 299
Fitchbug, Mass.
WannaRunner Offline OP
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Quote:

Stock steel gasket is .020 thick.

Mopar Performance P4286754




Thanks!

Re: Head gasket........ [Re: WannaRunner] #980836
04/26/11 09:59 PM
04/26/11 09:59 PM
Joined: Jan 2003
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Junky Offline
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Quote:

Quote:

The Comp XE268H cam will work just fine in a stockish 383. Yes, you can hear it tapping away because of the fast ramp lobes, but it's no big deal. I ran the XE262H which is one step down from the 268, this was with stock heads and rockers and steel shim head gaskets. It was a tapper too, but I liked it. I now run a Hughes cam.

What type of exhaust/manifolds/headers, rear gears and transmission will you be running? That will make a difference on which cam is best to run.




Stock exhaust manifolds, stock 727, (I may go with a trans go kit) 323 gears, edelbrock 1407 carb (750 cfm)




The XE262H will have slightly more torque over the XE268H which will have slightly higher horse power over the 262. Personally I'd run the 262 with your combo. I ran the XE262H in my 383. It ran strong up to 5,700 RPM's. Slight noticeable idle. The 268 will work OK with high gears and low converter stall.


2010 Black Challenger SE <> 3.5 V6
Custom Shift Knobs www.flameball.com Check It Out
Re: Head gasket........ [Re: WannaRunner] #980837
04/27/11 11:35 AM
04/27/11 11:35 AM
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JohnRR Offline
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Quote:

Quote:

The Comp XE268H cam will work just fine in a stockish 383. Yes, you can hear it tapping away because of the fast ramp lobes, but it's no big deal. I ran the XE262H which is one step down from the 268, this was with stock heads and rockers and steel shim head gaskets. It was a tapper too, but I liked it. I now run a Hughes cam.

What type of exhaust/manifolds/headers, rear gears and transmission will you be running? That will make a difference on which cam is best to run.




Stock exhaust manifolds, stock 727, (I may go with a trans go kit) 323 gears, edelbrock 1407 carb (750 cfm)




Do yourself a favor and lose that carb , you'll be happier in the long run , it's got a bad setup from ebrock and requires drilling of passages to fix it , if you are lucky .

Re: Head gasket........ [Re: JohnRR] #980838
04/27/11 05:23 PM
04/27/11 05:23 PM
Joined: Jan 2008
Posts: 299
Fitchbug, Mass.
WannaRunner Offline OP
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WannaRunner  Offline OP
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Quote:

Quote:

Quote:

The Comp XE268H cam will work just fine in a stockish 383. Yes, you can hear it tapping away because of the fast ramp lobes, but it's no big deal. I ran the XE262H which is one step down from the 268, this was with stock heads and rockers and steel shim head gaskets. It was a tapper too, but I liked it. I now run a Hughes cam.

What type of exhaust/manifolds/headers, rear gears and transmission will you be running? That will make a difference on which cam is best to run.




Stock exhaust manifolds, stock 727, (I may go with a trans go kit) 323 gears, edelbrock 1407 carb (750 cfm)




Do yourself a favor and lose that carb , you'll be happier in the long run , it's got a bad setup from ebrock and requires drilling of passages to fix it , if you are lucky .




Any recommendations?

Re: Head gasket........ [Re: WannaRunner] #980839
04/27/11 05:30 PM
04/27/11 05:30 PM
Joined: Nov 2004
Posts: 843
Suffolk,VA
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ireland383 Offline
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Quote:

Quote:

Quote:

Quote:

The Comp XE268H cam will work just fine in a stockish 383. Yes, you can hear it tapping away because of the fast ramp lobes, but it's no big deal. I ran the XE262H which is one step down from the 268, this was with stock heads and rockers and steel shim head gaskets. It was a tapper too, but I liked it. I now run a Hughes cam.

What type of exhaust/manifolds/headers, rear gears and transmission will you be running? That will make a difference on which cam is best to run.




Stock exhaust manifolds, stock 727, (I may go with a trans go kit) 323 gears, edelbrock 1407 carb (750 cfm)




Do yourself a favor and lose that carb , you'll be happier in the long run , it's got a bad setup from ebrock and requires drilling of passages to fix it , if you are lucky .




Any recommendations?



Holley 3310

Re: Head gasket........ [Re: ireland383] #980840
04/27/11 06:07 PM
04/27/11 06:07 PM
Joined: Jan 2008
Posts: 299
Fitchbug, Mass.
WannaRunner Offline OP
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WannaRunner  Offline OP
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Quote:

Quote:

Quote:

Quote:

Quote:

The Comp XE268H cam will work just fine in a stockish 383. Yes, you can hear it tapping away because of the fast ramp lobes, but it's no big deal. I ran the XE262H which is one step down from the 268, this was with stock heads and rockers and steel shim head gaskets. It was a tapper too, but I liked it. I now run a Hughes cam.

What type of exhaust/manifolds/headers, rear gears and transmission will you be running? That will make a difference on which cam is best to run.




Stock exhaust manifolds, stock 727, (I may go with a trans go kit) 323 gears, edelbrock 1407 carb (750 cfm)




Do yourself a favor and lose that carb , you'll be happier in the long run , it's got a bad setup from ebrock and requires drilling of passages to fix it , if you are lucky .




Any recommendations?



Holley 3310




I looked into the 3310, is 750 to much for my set-up?

Re: Head gasket........ [Re: WannaRunner] #980841
04/27/11 07:51 PM
04/27/11 07:51 PM
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JohnRR Offline
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750 is fine. If you have a stock iron intake a Holley will require at least a 1/2" spacer to clear the intake.

If you want to keep it stockish looking buy a 650 Thunder series ebrock carb m, they don't have the same problems that 750 does .

Re: Head gasket........ [Re: JohnRR] #980842
04/27/11 08:15 PM
04/27/11 08:15 PM
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Junky Offline
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When I first got my Coronet it had a stock 383 out of a '71 Newport. It was a 4bbl and dual exhaust engine rated at 300hp and 410lbs of torq. Stock converter and 3.23 gears. I switched to the XE262H Comp cam, Weiand intake and ran the 600 Edelbrock with headers. Ran pretty good for what it was. I've done a bunch of changes since then.

So, if I were you, I'd run the XE262H with a 650 or 670 carb. That would make a nice driver with some fun. Run the steel shim gasket. They were used on our engines out of the factory.


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Re: Head gasket........ [Re: Junky] #980843
04/28/11 04:49 AM
04/28/11 04:49 AM
Joined: Jan 2008
Posts: 299
Fitchbug, Mass.
WannaRunner Offline OP
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Anyone run a Holley 670 street avenger on a Ebrock performer RPM? Also, is it possible to do a accurate compression check with the motor out of the car by rotating the crank with a breaker bar? I forgot to do it before yanking the motor. (using the starter)


Information overload!

Re: Head gasket........ [Re: WannaRunner] #980844
04/28/11 11:42 AM
04/28/11 11:42 AM
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Junky Offline
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I've ran 4 different carburetors on the Edelbrock Performer RPM with the XE262H cam, headers, 2500 stall converter and 3.73 rear grears. The Eddy 750, Eddy 650, Holley 670 and the best one, the 3310 Holley 750. I never could get the Eddy 750 tuned the way it should have performed. To me the 650 and the 670 were too small, not enough punch off the line and not enough top end. The 3310 Holley 750 was and is perfect.


2010 Black Challenger SE <> 3.5 V6
Custom Shift Knobs www.flameball.com Check It Out
Re: Head gasket........ [Re: WannaRunner] #980845
04/28/11 01:30 PM
04/28/11 01:30 PM
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JohnRR Offline
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Quote:

Anyone run a Holley 670 street avenger on a Ebrock performer RPM? Also, is it possible to do a accurate compression check with the motor out of the car by rotating the crank with a breaker bar? I forgot to do it before yanking the motor. (using the starter)


Information overload!




I doubt you will get anywhere near enough rotation speed to get anything remotely accurate . I would do a leakdown test but even then a little heat in the engine before hand would have been nice.

Is the engine original or has it been rebuilt ?

Re: Head gasket........ [Re: Junky] #980846
04/28/11 04:05 PM
04/28/11 04:05 PM
Joined: Jan 2008
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Fitchbug, Mass.
WannaRunner Offline OP
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Quote:

I've ran 4 different carburetors on the Edelbrock Performer RPM with the XE262H cam, headers, 2500 stall converter and 3.73 rear grears. The Eddy 750, Eddy 650, Holley 670 and the best one, the 3310 Holley 750. I never could get the Eddy 750 tuned the way it should have performed. To me the 650 and the 670 were too small, not enough punch off the line and not enough top end. The 3310 Holley 750 was and is perfect.





Sounds good, my choice is getting easier, thanks for taking the time to answer my Dumb ar$e questions.

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