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Re: Finally road test results! Magnum heads! [Re: eightlitermopar] #1180444
05/20/13 11:24 AM
05/20/13 11:24 AM
Joined: Jan 2003
Posts: 16,122
Grand Haven, MI
patrick Offline
I Live Here
patrick  Offline
I Live Here

Joined: Jan 2003
Posts: 16,122
Grand Haven, MI
Quote:

The old cam was your stocker 318 2bbl cam, and there were some bent pushrods. Some of the rods measured .020-.040 shorter with the bend calculated

EDIT:The new one is the comp extreme engergy 250H cam.
http://www.compcams.com/Company/CC/cam-specs/Details.aspx?csid=624&sb=0

Consider the specs with a 1.6 ratio and I have alot more lift. More of a torque cam than a street terror powerhouse. I chose this route for the road-tripping torque rather than racing.

eightlitermopar




you should feel things much stronger above 3500-4k....

my old '86 M body's 318 was all done by 4000 RPM stock. it's advertised torque peak was 2000 RPM....granted I never had headers and a 4bbl on that engine in that config....

that same short block with the magnum heads and my reground roller cam (used Bullet Cam's HR259/316 lobe) felt as strong as the 360 with an XE262 in it that I had in the car before I put the roller 'teen in.

the 259/316's specs are 259adv, 208@.050, 127@.200, .316 lobe lift (.506" with 1.6's)

your XE250's specs are 250 adv, 206@.050, 117@.200, .280LL (.461" with 1.6's)

with 10 degrees less duration at .2" lobe lift, and .045" less gross lift, I would expect your engine not to be as strong as mine was, but I would think it would feel much stronger above where the original cam/heads would nose over, which if the older 318 was anything like my '86, would've been about 3500 RPM...

how much ignition advance are you running? on my mag headed 318, it felt like it made the best power on the butt dyno with about 30 degrees total advance, and felt like it slowed down if you gave it older LA advance levels (36-40)....


1976 Spinnaker White Plymouth Duster, /6 A833OD
1986 Silver/Twilight Blue Chrysler 5th Ave HotRod **SOLD!***
2011 Toxic Orange Dodge Charger R/T
2017 Grand Cherokee Overland
2014 Jeep Cherokee Latitude (holy crap, my daughter is driving)
Re: Finally road test results! Magnum heads! [Re: patrick] #1180445
05/21/13 09:37 AM
05/21/13 09:37 AM
Joined: Mar 2005
Posts: 1,630
North Central Florida
E
eightlitermopar Offline OP
top fuel
eightlitermopar  Offline OP
top fuel
E

Joined: Mar 2005
Posts: 1,630
North Central Florida
Thanks for the info Patrick!

I am hoping to get some more miles on it this week. I've been busy at work instead of driving it!

My to do list

1) Get a drop base air cleaner to fit the hood.
2)Put said hood on
3)Get some miles on it and see if it passes emissions
4) Fatten up the carb
5) Mess with the timing (I honestly have no idea at this point what my total is)

Thanks again! I will keep you posted.

eightlitermopar


Mopar or no car
Re: Finally road test results! Magnum heads! [Re: patrick] #1180446
05/21/13 10:43 AM
05/21/13 10:43 AM
Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
RapidRobert Offline
Circle Track
Happy Birthday RapidRobert  Offline
Circle Track

Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
Quote:

on my mag headed 318, it felt like it made the best power on the butt dyno with about 30 degrees total advance, and felt like it slowed down if you gave it older LA advance levels (36-40)....


Patrick was that with or without quench?


live every 24 hour block of time like it's your last day on earth
Re: Finally road test results! Magnum heads! [Re: RapidRobert] #1180447
05/21/13 10:58 AM
05/21/13 10:58 AM
Joined: Jan 2003
Posts: 16,122
Grand Haven, MI
patrick Offline
I Live Here
patrick  Offline
I Live Here

Joined: Jan 2003
Posts: 16,122
Grand Haven, MI
no quench...pistons were .055 in the hole and I used .028" gaskets....


1976 Spinnaker White Plymouth Duster, /6 A833OD
1986 Silver/Twilight Blue Chrysler 5th Ave HotRod **SOLD!***
2011 Toxic Orange Dodge Charger R/T
2017 Grand Cherokee Overland
2014 Jeep Cherokee Latitude (holy crap, my daughter is driving)
Re: Finally road test results! Magnum heads! [Re: patrick] #1180448
05/21/13 11:09 AM
05/21/13 11:09 AM
Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
RapidRobert Offline
Circle Track
Happy Birthday RapidRobert  Offline
Circle Track

Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
Thanks Patrick. I have mag heads going on a non quench 318 so I will go with your recommendation of 30 total


live every 24 hour block of time like it's your last day on earth
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