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Author
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Topic: Cylinder head question.
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wythors
Gearhead Posts: 2577
From: The cold, gray Pacific Northwest
Registered: Sep 2000
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posted 11-29-2001 09:47 PM
   
Well, it's coming up on tax refund time (translation: $$$ to spend on the car) and if I have enough left over after tires, wheels, a new top and a windshield, I'm going to install some new cylinder heads on my '93. Currently I have Flowmaster after-cat exhaust, headers and a cold air induction set-up. Eventually, I'll probably end up installing a Vortech A- or S-trim blower. I'm planning on using cast iron Windsor Sr. or Jr. heads. My question is: I have heard that Sr heads are preferable for blower applications and Jr heads for naturally aspirated due to the different combustion chamber volumes. Will Sr's hurt performance if I end up not putting on the blower for a while? Will Jr's perform acceptably with the blower if I elect to go that way? Should I wait a year and do the heads and blower at the same time? Will the Mariners win the pennant next year? Enlighten me o' wise M&Mer's. ------------------
Dave 1993 5.0 LX convertible.
Part-time driver of one badass black 96 Cobra.
MCA Member #47838
M&M Member #666 September 11, 2001 - Never Forget [This message has been edited by wythors (edited 11-30-2001).]
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FISHTAIL
Gearhead Posts: 424
From: Waldorf MD USA
Registered: Sep 2000
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posted 11-30-2001 12:08 PM
Well....first of all, what made you decide to go with windsor anything? Price? There are alot of choices out there these days.  . Now, I can't remeber specific combustion chamber sizes for the jr, and sr heads, but as long as the chambers on the sr's aren't significantly larger than the stock chamber size you won't hurt performance. But if you do get the higher compression jr heads, they won't work as well with a blower(if at all, you'd have to get something that puts out very little boost). Your almost always better off going with the lower compression motor build up if your planning on power adders later. If you know FOR SURE that you never ever want to add anything like NOS, a supercharger or turbo, then going with the high compression stuff is obviously your best move. But sticking with larger cc, lower compression heads will let you keep more of your options open. Having said that, I would definatly go for the sr heads. ------------------
-FISHTAIL
92GT "The Ghetto Sled"
CMPS major @ University of MD college park
Best ET/MPH thus far: 14.40/100.67mph....damn wheel spin.
VP and co-founder of CMTC www.cmntc.com
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bluestreek
Gearhead Posts: 484
From: Athens,GA
Registered: Jul 2001
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posted 11-30-2001 12:38 PM
Or... You can use the JR. heads and have about the right compression after you port the chambers to unshroud the valves real good.. If you buy them bare, then you can also install the better flowing Ferrea or Manley Race valves that give about 15% flow increase.. A nice unshrouded chamber and good valves, along with minor pocket porting in the bowl area beneath the valves , will make them run better than a stock SR and still have exellent low end torque.. Just a thought..
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FISHTAIL
Gearhead Posts: 424
From: Waldorf MD USA
Registered: Sep 2000
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posted 11-30-2001 12:55 PM
Yeah, but by the time he pays for all of that, wouldn't he just be better off getting a different set of heads that flow better from the start? Like some low comp 185/65 AFR's? Or something else similar?------------------
-FISHTAIL
92GT "The Ghetto Sled"
CMPS major @ University of MD college park
Best ET/MPH thus far: 14.40/100.67mph....damn wheel spin.
VP and co-founder of CMTC www.cmntc.com
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Stewart
Moderator Posts: 7607
From: Monterey, CA Mustangsandmore Member #437
Registered: Apr 2000
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posted 11-30-2001 08:05 PM
quote:
Originally posted by FISHTAIL:
Like some low comp 185/65 AFR's? Or something else similar?
Oh man...the AFR's are all the rage right now. But I dunno, I still like the Edelbrock series and Trick Flow heads. Stewart
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MrWesson22
Gearhead Posts: 459
From: Dacula, GA
Registered: Sep 2000
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posted 11-30-2001 08:14 PM
What about Canfields? In stock form, they'll flow great for your motor now, and they could be really hogged out for a monster blower motor later. Just a thought.
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Neal
Member #723
[email protected] AIM: MrWesson22 69 Gulfstream Aqua Grande
351C/Toploader 4sp
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wythors
Gearhead Posts: 2577
From: The cold, gray Pacific Northwest
Registered: Sep 2000
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posted 11-30-2001 09:04 PM
Windsor because of price and I don't want aluminum.
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bluestreek
Gearhead Posts: 484
From: Athens,GA
Registered: Jul 2001
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posted 11-30-2001 10:56 PM
quote:
Originally posted by FISHTAIL:
Yeah, but by the time he pays for all of that, wouldn't he just be better off getting a different set of heads that flow better from the start? Like some low comp 185/65 AFR's? Or something else similar?
Well, the bare Windsors are really cheap ($500 a pair) and minor porting is cheap too, if you do it yourself.. It's not that hard.. and the good valves and springs are a nice low end improvement to any head.. You get what you pay for.. I'm leary of the aluminum heads too.. There's something very reassuring about having iron above your cylinders instead of aluminum.. For $500 a pair (bare), they can open your budget to more quality parts than the standard high dollar aluminum heads.. I think I may go this route on my 336 cu.in. project. 
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steve'66
Gearhead Posts: 3231
From: Sonoma,CA,USA
Registered: Mar 2000
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posted 12-01-2001 12:37 AM
Cast Iron is for boilers and engine blocks, not for heads! Aluminum is the only way to go, they allow more compression and save a few pounds off the nose of the car too. SteveW
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bluestreek
Gearhead Posts: 484
From: Athens,GA
Registered: Jul 2001
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posted 12-01-2001 04:16 AM
I'm still thinkin on it.... I've got 2 sets of 289 Powerheads that I can sell to come up with a down payment.. 
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