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Author
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Topic: Your opinions on these cams for my combo
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68stang351
Gearhead Posts: 273
From: Savoy TX, USA
Registered: Mar 2002
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posted 02-05-2003 10:10 PM
   
First the specifics:
69 351W fresh rebuild .030 stock CR
Stock heads (for now)
Edelbrock performer RPM intake
Edelbrock 600 carb
Headman conversion headersThats really it besides all the little stuff (ign. and pulleys and what not) Anyways here's the cams I was looking at, wondering if maybe they were possibly too big. What do you think? Comp cams Extreme energy
XE268H
Adv. dur. I-268, E-280
Dur. @.050 I-224, E-230
Lift (w/1.6 rockers) I-.510, E-.512 Or XE262H
Adv. dur. I-262, E-270
Dur. @.050 I-218, E-224
Lift (1.6 rockers again) I-.493, E-.500 I plan on putting some good heads on later, but I want it to work well with stock heads too. Or I may just get the cam, wait till I get heads too and do it all at the same time. What's your opinions of these cams with stock heads, and also with trickflows or AFR 165 heads? ------------------
Hoofbeats are louder than Heartbeats!
68 Coupe, now with a 351W and 5speed.
Now officially dubbed "THE PIT"
87 LX Coupe - Daily Driver
63 Fairlane 500
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D&S Induction Systems
Gearhead Posts: 118
From: Columbia Heights Mn U.S.A.
Registered: Feb 2003
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posted 02-05-2003 11:06 PM
So much to say and dont know whare to start...As far as you're current plans go...I would
get the 268H (1600 to 5800 rpm) and do sme port work to the heads and intake so tha will keep up when you ring it out to 5800-6000 rpm's.  The "performer RPM is only good idle to 5500. Witch can be changed. 
I minght even open up the valves to 1.94/1.60. NOTE: If you are serous about TF heads and want to run the "Twisted Wedge" heads, you are probibly going to have to get differnt pistons. (The location on the In. valve in NOT stock and require special valve relives.) I wouldn't run the performer RPM with TF wedge heads any way. World makes a real nice 1.94/1.60 affordable iron head. You minght want to check them out. Insted of the Edelbrock performer RPM. I probibly would have went with Weiand Stelth and some World heads. 
[This message has been edited by D&S Induction Systems (edited 02-05-2003).]
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Dubz
Gearhead Posts: 1048
From: Manitoba Canada
Registered: Oct 2002
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posted 02-05-2003 11:15 PM
why would you choose a Weiand Stealth instead of a Performer RPM...------------------
1974 Gran Torino, 351W Just a young buck
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Moneymaker
Administrator Posts: 21725
From: Lyons, IL, USA
Registered: May 99
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posted 02-05-2003 11:17 PM
I wouldn't !  ------------------
Alex Denysenko
Co-Administrator and Moderator NHRA/IHRA/SRA member and licensed Superstock driver
MCA member# 53321
NHRA and IHRA SS/LA National Record Holder '00,'01,'02,&'03
Fleet of FoMoCo products including 88 ASC McLaren Mustang #28
Professional Manwhore
The Barry of BarrysGrrl Quote #1: "I never met a magazine mechanic I liked."
Quote #2: "Make sure brain is in gear before engaging mouth!"
Quote #3: "If you can't run with the big dogs, stay on the porch!"
www.moneymakerracing.com
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D&S Induction Systems
Gearhead Posts: 118
From: Columbia Heights Mn U.S.A.
Registered: Feb 2003
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posted 02-05-2003 11:35 PM
I would
Well he's talking about getting some aftermarket heads.The Performer RPM has an RPM range of idle to 5500 RPM's (out of box) Stelth is idle to 6800 RPM (out of box). You will be better off with the Stelth if you're using aftermarket heads. Even with some modifycations the Performer will have problems feeding the engine over 6050 rpm's. If he leaves the heads the way thay are then I would go with the Performer. Just because is has a little better low RPM velocity.
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Dubz
Gearhead Posts: 1048
From: Manitoba Canada
Registered: Oct 2002
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posted 02-05-2003 11:43 PM
the performer rpm is 1500 - 6500 rpm out of the boxIf i am not mistaken, the range of the manifold is where it is designed to perform best, not that it stops dead and won't flow more air when it passes 6500 rpm
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MrWesson22
Gearhead Posts: 1212
From: Dacula, GA
Registered: Sep 2000
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posted 02-05-2003 11:49 PM
I would never choose that weiand or a standard performer over an rpm. On every dyno I've ever seen, the rpm outperformed the standard performer from about 2K up. And why would you really care about a little hp under 2K when 98% of full throttle acceleration occurs above that rpm anyway? If you're planning on swapping heads, I would wait and do heads/cam at the same time. Any cam you get is either going to be too big now or too small with the aftermarket heads. If you're going with AFRs, I'd get the 185s over the 165s on a 351 for sure as well. But there are plenty of others here who know more about this stuff than I.
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Neal 69 Gulfstream Aqua Grande
351C/4sp
https://mustangsandmore.com/ubb/MrWesson22.html
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D&S Induction Systems
Gearhead Posts: 118
From: Columbia Heights Mn U.S.A.
Registered: Feb 2003
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posted 02-05-2003 11:57 PM
Sorry, my mistake  I was thinking of the Performer, not the Performer RPM.
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bluestreek
Gearhead Posts: 1460
From: Athens,GA
Registered: Jul 2001
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posted 02-06-2003 12:58 AM
I think the XE268 and the rest of your combo sounds OK for a stock 351. At least clean up the bowl area and the exhuast ports though. Please!!  ------------------
1966 Mustang Coupe: Custom glass hood and BIG scoop sits atop a 289 stroked to 331 c.i., Steel crank and girdle, 5.4 H-beams, Forged slugs, ported TFS alum. heads, ported Stealth 8020 intake, CompCams Xtreme Solid Roller, Holley 750 HP, long tubes, 4speed, 9" 3.50 posi, BFG Drag radials..
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n2oMike
Gearhead Posts: 1805
From: Spencer, WV
Registered: Jan 2001
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posted 02-06-2003 10:05 AM
quote:
Originally posted by bluestreek:
I think the XE268 and the rest of your combo sounds OK for a stock 351. At least clean up the bowl area and the exhuast ports though. Please!!
Grind that thermactor hump completely out of the exhaust port too! A $19 Ebay 1/4" grinder and a carbide burr will make those humps disappear in no time! (just use a dimmer switch to keep the speed down) Good Luck! ------------------
Mike Burch
66 mustang real street
302 4-speed 289 heads
10.63 @ 129.3
http://www.geocities.com/carbedstangs/cmml_mburch.html
http://www.fortunecity.com/silverstone/healey/367
http://www.mustangworks.com/cgi-bin/moi-display.cgi?220
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Gearhead
Gearhead Posts: 2165
From: Vancouver Island, Great Wet North
Registered: Mar 2000
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posted 02-06-2003 11:19 AM
I used the XE262H in my 308 that I had in my 1979 Pace Car. It was a great little cam, but with the extra cubes and better breathing of the 351 I would say go for the XE268H. It was a toss up between the two for me, but I was running a Performer 289 intake and the stock heads (with a little bit of bowl work), so I wasn't going to see any benefit from the extra lift or additional duration offered by the 268.What I can tell you is that if the 262 is any indication of the performance of CompCams Extreme Energy series of cams, then you won't be disappointed with the XE268H!! My car pulled right from 1500 rpm, and sailed to 6000 with no problems, and no noticeable drop off between 5500 and 6000. Nice all around street/performance cam. Go for it!! ------------------
Cheers,
Ian
M&M Member #395
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Former owner of 1979 Mustang Indy 500 Pace Car #9R03F480505
Ian's Pace Car Website
Vancouver Island Mustang Association Website
Indy Pace Car Registry of Mustangs Official Website "A friend will bail you out of jail after you do something stupid... a real friend will be sitting beside you saying 'That was SO COOL!!'".
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68stang351
Gearhead Posts: 273
From: Savoy TX, USA
Registered: Mar 2002
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posted 02-06-2003 12:10 PM
Thanks guys. You know they're cheap too! $106!!!------------------
Hoofbeats are louder than Heartbeats!
68 Coupe, now with a 351W and 5speed.
Now officially dubbed "THE PIT"
87 LX Coupe - Daily Driver
63 Fairlane 500
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