Does any one knows if the camshaft on the H.Os are different From the Cobras 5.0?? i got a 5,0 H.0 just got some gt40 heads and intake i want to know if the Cam is different I want to put a more aggressive cam on my engine i want a cam that will give me good idle! So what kind of Cam should i get? Another question my Mav don't have PWR Steering how do i delete the pump on my H.O? i'll have A/C but no P.S Thank you All!!!
same cam in a cobra and an HO, the cobra's power was the intake I think, but I went carb'd with mine anyway
Actually the cam specs are different on the cobra cam and it also had 1.7 ratio roller rockers.duration was 270/270 and lift is 479/479 stock ho cam is 276/266 and 444/444 also just take the pump off and get a shorter belt.That's what I did.
Ditto, the Cobra had a different cam, different heads, different intakes & rockers. The cam lift itself was nearly the same as the H.O. cam---.278 (HO) vs .282 (Cobra) Using 1.7's on the HO cam yeilds only .006 less lift than the Cobra.
how about thiscam?? Valve lift INT/EXT:493/510.[FONT=arial,verdana,helvetica,sans] Duration Adv. Int/Exh in degrees: 289/299..[/FONT][FONT=arial,verdana,helvetica,sans]Duration @.050 Int/Exh in degrees: 212/222 [/FONT][FONT=arial,verdana,helvetica,sans] Lobe Centerline: 112[/FONT]
A cam that works well with the stock heads and the tfs heads is the stage 1 tfs cam.I have ran this cam with both stock heads and aftermarket.It has a slightly rough idle but great streetability. cam specs are 221/225 @50 and 499/510.
Here is the practical difference between the Cobra cam and the HO. The intake duration is somewhat less adding some low end torque. The exhaust duration is somewhat longer adding more mid and top end power. The lobe spread is close to 118 degrees so idle will be rock solid. This cam was speced to better use the GT40p heads and results in a wider power band. The E7 heads compaired to the 40p. At about 3500 rpm the 40p will begin to out perform the E7s and tend to extend the top rpm power by another 300 to 500 rpm. It was a combination deal that complimented each other. Used seperately may give different results. I currently run an 01 5L with it's original 40p heads and with the 95 cam plus Crane 1.7 roller rockers, in place of the original cam. I have done software sims on all these combinations and see what the trend is with various combinations. For best overall performance, leave the cam keyed at zero. No advance or retard. Doing either will rock the power band but when the average is figured there is a net loss. The factory design was as close as you could possibly come with the combination.
According to Ford's specs the Cobra's duration is 270/270. The HO cam is 266/266. Where'd you get your info? It was also spec'd for GT40 heads, not the "P" heads. Those hadn't been invented yet. The GT40P motors used the F4TE cam, same cam also used in the E & F series 5.0's from 94-97. Ford actually down rated the GT40 Cobra 5.0 in using the Cobra's cam.
ok,guys but please tell me what to do, should i live the h.o cam and use the gt 40s head and intake? or should i get another cam? if i'm buying a new cam i want something spicy a bit more agressive but with decent idle i'll be using E.F.I from the H.O... will it make any difference if i use just the gt 40 heads on the H.O with the H.O's intake?
Yea, it will make a difference, the heads alone are worth about 25 horses. You can always port the intakes and run a larger throttle body. The HO cam specs with 1.6 rockers are .444/.444 266/266 duration. Use 1.7 rockers and the lift goes up to .473.
Just remember it's easier to change an intake in the car that it is to swap a cam.I would do the cam and heads if it is a money issue and do the intake later.
baddad you just hav'nt saw all the info yet. The Cobra cam # is F3ZE-CA. The duration numbers don't tell you all you need to know. The opening/closeing points are where it's at. The Cobra cam is as follows, In op at 19 , clo at 71. Exh op at 75.5, clo at 14.5. LOBE lift is .282. EX lobe center is 121.5 ................................. HO cam, In op at 20, clo at 76, Ex op at 67, clos at 19. LOBE lift is .278. Ex lobe center is 115. Gross duration numbers don't mean much, cam to cam. As I had explained, look at the numbers to see the shorter intake duration and the longer exhaust and the effects it has. The Explorer cam is different yet and is a nice cam for general street throttle response. To bad it could not use the potential of the 40p heads on those motors but after all the truck was an SUV and not a hot street racer like a Mustang.
The Ford 5.0 book shows all those specs. I took the gross duration numbers from there as well. The only mystery I've come across is the duration specs for the HO cam. This book lists it as 276/266 (Int/exh) And the Ford racing lists it as 266/266. I've seen others say it was 276/276. I tend to think it may be 276/276 as in reading the chapter on the Cobra 5.0 development, they point out the Cobra cam was milder than the HO, but with slightly more duration. I know all about the Explorer cam's characteristics, I've had one in my Ranger's 5.0 for years now. This motor is the equivalent of the Explorer 5.0 but with ported E7's and 1.7 rockers. Intake is a Ford A321 topped with a Holley 570 SA carb. You think this cam lacks something with better heads? Think again. It pulls flat out from idle to 6000 rpms (valve float with the rollers and springs I have on the heads are limiting it) with no dead areas. It's wide LSA allows the carb circuits to work instantly, I rarely ever have to give it a "pump shot" to prime it. It runs exactly like it's got EFI. If you drove it and I hadn't told you, you'd never know the difference. It's the best cam I've ever run with a carb. I can boil the rear tires on the Ranger on demand and they're 275/60/15's with 3.73's & a traction loc unit. Near as I can tell the fuel mileage is damned good too. The bottleneck in an Explorer 5.0 is the exhaust, not the cam.
