1993 cobra cam
- Thread starter kevin2m4
- Start date
It's terrible. It's the same came used in the 91-93 thunderbords with the 5.0HO
Don't waste your time with one
Don't waste your time with one
car is a 91 cougar xr7 aod trans with shift kit.
engine is rebuilt 20 over hyper pistons with valve reliefs, mac shorty headers, ported rebuilt e7's, gt40 intake and throttlebody, 1.72 rr's, new everything else bla bla bla the car weighs 3800lbs.
the cam i have now is stock ho stang, i had it polished and i have 10 over bearings i bought... so to use a new cam id have to get new bearings. i just want the car to be fun.
engine is rebuilt 20 over hyper pistons with valve reliefs, mac shorty headers, ported rebuilt e7's, gt40 intake and throttlebody, 1.72 rr's, new everything else bla bla bla the car weighs 3800lbs.
the cam i have now is stock ho stang, i had it polished and i have 10 over bearings i bought... so to use a new cam id have to get new bearings. i just want the car to be fun.
grey5.0beast
Cookies should never be DUNKED!!!
S/c or turbo 
Seriously the cam won't be the one thing that makes it fun to drive, besides with the 1.72RRs you change the valvetrain specs anyway, kinda like getting a new cam.
Seriously the cam won't be the one thing that makes it fun to drive, besides with the 1.72RRs you change the valvetrain specs anyway, kinda like getting a new cam.
From the first link in my signature:
Stock 87-93 Cam Information:
Lift is .444*/.444* - Advertised @ 266*/266* until August of '88, then it went to 276*/266* .
Duration at .050" varies and ranges from 204*+/204*+
85-88:
Lift: .278 intake, .278 exhaust
Duration: 266 intake 266 exhaust
Overlap: 36 degrees, 9.04 factor
Lobe Center: 115 intake, 115 exhaust
89-90:
Lift: .278 intake, .278 exhaust
Duration: 276 intake, 266 exhaust
Overlap: 39 degrees, 19.51 factor
Lobe Center: 116 intake, 115 exhaust
91-95:
Lift: .278 intake, .278 exhaust
Duration: 276 intake, 266 exhaust
Overlap: 39 degrees, 19.51 factor
Lobe Center: 116 intake, 115 exhaust
93-95 Cobra:
Lift: .282 intake, .282 exhaust
Duration: 270 intake, 270 exhaust
Overlap: 33.5 degrees, 15.24 factor
Lobe Center: 115 intake, 121.5 exhaust
1985-08/1988
I.O. 17 BTDC / I.C. 69 ABDC
E.O. 67 BBDC / E.C. 19 ATDC
08/1988 - 1993
I.O. 20 BTDC / I.C. 76 ABDC
E.O. 67 BBDC / E.C. 19 ATDC
The stock 85-88 HO cams are a bit better than the others due to a bit more aggressive intake ramp rate.
cenok is family
15 Year Member
cenok is family
15 Year Member
Hyper pistons = lighter than forged, has better sealing properties than forged (less expandable), and will hold up fine under boost, until the block/rods crack or bend
everyone always tells me hyper pistons are really brittle and after a while will start to break under boost or higher compression. hence why they're cheaper.
payupsucka
Member
yeah i have seen alot of people use nitrous and boost over the hypers and they do well. they werent running insane amounts of it, like 5 psi and a 100 shot. but they act fine. for a N/A motor with stock/low compression they work fine, they expand and fit snug in the cyl when it heats up better than a forged slug. i doubt there is a problem running 8 psi or a 150 shot on hypers, like stated above just keep a close eye on things and be on the safe side with timing and fuel and monitor detonation and keep it away. all of which you should be doing regardless of what piston your running.
a good tune will give you the fuel and spark YOUR engine wants/needs and will keep it running good, if the mods are extensive enough to where the stock EEC is having trouble giving the engine ideal fuel and spark for the application
a good tune will give you the fuel and spark YOUR engine wants/needs and will keep it running good, if the mods are extensive enough to where the stock EEC is having trouble giving the engine ideal fuel and spark for the application
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