Im starting an engine build with a nother 302 i have that i want to drop in the merc next spring, i have a set of 351 windsor heads, look like old ones, and they take the bigger spark plugs, some one told me that if i put them on a 302 it will boost the compression up,, just wanted to know how they differ from the stock 302 heads and how much of a differnce they will make,,
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Need more info... year, casting # if possible.Builder/Owner of Badass Panther Wagons
Busy maintaining a fleet of Fords -
ok i will have to get the casting numbers since i have them at work, ill bring them home tomorow,,Comment
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assuming 300hp with a CR of 9:1, jumping up to 12:1 will only give you 23HP and be at or very easily past the limit of pump gas.http://secondhandracing.com/Home.aspx
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R.I.P. Jason P Harrill 6-12-06
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Figured out all this a while back. The comprersion is under 10 to one. 9.5 or so. One thig is pushrod length. Due to deck height differances some situatios might require slitly longer than stoc 5.0 pushrods. Might get away with factory rockers and stock or mild cams. If your running full roller rockers best to check valve tip contact patch. Push rods are al ways the last part I purchase after building an engine.Scars are tatoos of the fearlessComment
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gonna need special head bolts to use 351w heads on a 302.........351w panther heads were poo........87 up trucks are e7's
1986 lincoln towncar signature series. 5.0 HO with thumper performance ported e7 heads, 1.7 roller rockers, warm air intake, 65mm throttle body, 1/2" intake spacer, ported intakes, 3.73 rear with trac lock, 98-02 front brake conversion, 92-97 rear disc conversion, 1" rear swaybar, 1 3/16" front swaybar, 16" wheels and tires, loud ass stereo system, badass cb, best time to date 15.94 at 87 mph. lots of mods in the works 221.8 rwhp 278 rwt
2006 Lincoln Town Car Signature. Stock for now
1989 Ford F-250 4x4 much much more to come, sefi converted so far.
1986 Toyota pickup with LSC wheels and 225/60/16 tires.
2008 Hyundai Elantra future Revcon toad
1987 TriBurner and 1986 Alaska stokers keeping me warm. (and some pesky oil heat)
please be patient, rebuilding an empire!
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You can use regular 302 head bolts, but you will need the reducer washers.Originally posted by lincolnmaniahttp://secondhandracing.com/Home.aspx
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R.I.P. Jason P Harrill 6-12-06
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If its got the big plugs, you're talking 70s or older model heads. Best hope is probably a C9, or D0 casting number. They'll probably raise the compression marginally, but it won't be a huge amount. It really depends on the exact head though. Different castings had different size combustion chambers. Just because its a 351 head doesn't necessarily mean higher compression ratio.86 Lincoln Town Car (Galactica).
5.0 HO, CompCams XE258,Scorpion 1.72 roller rockers, 3.55 K code rear, tow package, BHPerformance ported E7 heads, Tmoss Explorer intake, 65mm throttle body, Hedman 1 5/8" headers, 2.5" dual exhaust, ASP underdrive pulley
91 Lincoln Mark VII LSC grandpa spec white and cranberry
1984 Lincoln Continental TurboDiesel - rolls coal
Originally posted by phayzer5
I drive a Lincoln. I can't be bothered to shift like the peasants and rabble rousersComment
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You want to look for the following castings: C9OE-B, C9OE-D, D0OE-C, D0OE-G, D0OZ-C, D5TE-EB.
All of those still had the larger valves, with 60.4cc combustion chambers. Later than that they refrained to the 302 valves and 69cc combustion chambers, basically the same as a 302 head.1990 Country Squire - weekend cruiser, next project
1988 Crown Vic LTD Wagon - waiting in the wings
GMN Box Panther History
Box Panther Horsepower and Torque Ratings
Box Panther Production NumbersComment
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What kind of C.R. would you be looking at with that size chamber?Originally posted by Tiggie
2001 Ford Crown Victoria P71 - "The Fire Engine"
1985 Lincoln Town Car Signature Series
But God demonstrates his own love for us in this: While we were still sinners, Christ died for us. Romans 5:8Comment
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On a stock lo-po to '85, you'd be going from an 8.4 to a 9.3 or so. But piston choice will make the difference. On a 351W, it be going to about a 9.2 or so.Originally posted by Nathan in MN1990 Country Squire - weekend cruiser, next project
1988 Crown Vic LTD Wagon - waiting in the wings
GMN Box Panther History
Box Panther Horsepower and Torque Ratings
Box Panther Production NumbersComment
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Would a 9.4:1 C.R. require premium fuel?Originally posted by TiggieNick
88 Colony Park LS
G-pa's old car, but he's cruisin around heaven in his 69 wagon now
Future plans:Semi HO conversion, or Explorer motor swap, shift kit, PI springs and sway bars, KYB-GR2 shocksComment
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Most likely not. Obviously there's a lot of factors, but you're most likely safe on the cheap stuff up to around 10:1.
2001 Ford Crown Victoria P71 - "The Fire Engine"
1985 Lincoln Town Car Signature Series
But God demonstrates his own love for us in this: While we were still sinners, Christ died for us. Romans 5:8Comment
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hmm.. well once i get the casting numbers and figure out if they are any good i might do some port work and some preformece valve grinds,,Comment
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I was running about 9.4, 16deg of timing and a 75 shot on 87 octane.Originally posted by 88MercWagon
Now im running even less compression (67cc heads vs the 64cc E7s) a little less timing and a 125 shot and run 93.http://secondhandracing.com/Home.aspx
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R.I.P. Jason P Harrill 6-12-06
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