The stock cam is pretty decent especially when coupled with 1.7 RR's to add valve lift, and I've seen combos make over 360 flywheel HP on the dyno with the stock cam/1.7 RR's so 300rwhp is definitely possible.
revhead347 said:
While the cam itself may be inexpensive, you also have to factor in the cost of upgraded valve springs/retainers/keepers unless you order new heads that already have them. Depending on the cam, you may also need to have the pistons flycut to gain piston-to-valve clearance. You also have the additional cost of installing the cam (unless you DIY) plus the possibility of needing to replace cam bearings in the block (which is an engine out job).
yeah but what it makes at the motor and then at the rear wheels is two different things, It only counts for what your putting down to the ground
I'd expect an SN95 Stang with a T5 and 370 flywheel HP to put down about 320rwhp. With an AODE it would be more like 285rwhp.
Here's an example I got from an old HotRod magazine:
Ford 5.0 V8 EFI
C&L 76mm CAI/MAF kit
Edelbrock 70mm TB
Edelbrock Performer RPM II intake
FRPP 1.7 RR's
Stock cam
Edelbrock Performer RPM II heads
1-5/8" long tube headers
Magnaflow mufflers
FRPP 24lb injectors
Aeromotive fuel pressure regulator
A9L computer with custom chip
372hp @ 6100rpm and 361lbft @ 4700rpm (flywheel) with a 12.5-12.8 A/F ratio
With CompCams XE270HR-12 cam added (PN35-324-8):
388hp @ 6000rpm and 376lbft @ 4900rpm, so that's a mere 16hp/15lbft from the cam swap.
Here's an example I got from an old HotRod magazine:
Ford 5.0 V8 EFI
C&L 76mm CAI/MAF kit
Edelbrock 70mm TB
Edelbrock Performer RPM II intake
FRPP 1.7 RR's
Stock cam
Edelbrock Performer RPM II heads
1-5/8" long tube headers
Magnaflow mufflers
FRPP 24lb injectors
Aeromotive fuel pressure regulator
A9L computer with custom chip
372hp @ 6100rpm and 361lbft @ 4700rpm (flywheel) with a 12.5-12.8 A/F ratio
With CompCams XE270HR-12 cam added (PN35-324-8):
388hp @ 6000rpm and 376lbft @ 4900rpm, so that's a mere 16hp/15lbft from the cam swap.
Sorry bro I ain't buyin that either. True enough the stock cam is a decent grind, but even with the 1.7RR's that motor doesn't have enough cam to make that kind of power.
That should actually be pretty close to accurate....those ARE flywheel numbers.....so you're looking at a tad over 300 hp with a t5 and a tad under with an aode. And what stock 5.0 cam is that in the article? It could be a cobra cam...which obviously still isn't a powerhouse....but still good for some extra horses, and who knows how radical that "custom chip" is....just something to think about
It was a '91 5.0 GT engine that was freshened up with new rings/bearings. The cam was a stock '91 GT unit and the computer used was a A9L with a custom burnt chip. HP/TQ numbers were at the flywheel.
With stock H/C/I, 19lb injectors, stock A9L, and the simple bolt-on mods below, the engine made 275hp/330lbft at the flywheel, so the Eddy RPM heads/intake were apparently worth a 97hp/31lbft gain.
'91 5.0 GT long block
C&L 76mm CAI/MAF kit
Edelbrock 70mm TB
FRPP 1.7 RR's
1-5/8" long tube headers
Magnaflow mufflers
The chip was burnt for 91 octane gas.
A thought or two about this example
First of all ... Its a Rag Mag ......
Those guys are always suspect to be on the very optimistic side of things
I find it kinda funny to see an older Fox pcm A N D a chip
I see no gain from the pcm that a tune on the original pcm would not yield
and
The afpr is not needed with a Tune so that is a go gain part as well
As for the amount of horsepower ..............
I've found most stick trans combos that are at 300 to the wheels ...
give or take a few ... will be very close if you take your suspected
fwhp and multiply by .85
In this case ... 370 X .85 = 315
So Yes ... Your estimate of 320 is right there in the ballpark if you ask me
As for estimating hp with an Auto Trans ..............
In no way would I guess
as
I've seen no pattern whatsover with them
That choice of intake coupled with the stock cam
They just don't seem to go well together as I see it ...........
cause
You got an intake that will work well on the top end
and
You got a cam that is not designed to work well up top
If I read it correctly
They put in that Comp cam and got 388 fwhp
388 X .85 = 330 rwhp
If they did that ... they would certainly be on the very ... very ... top
of the average gain you see from all the aftermarket h/c/i combos
found on all these Stang boards.
That example is rare amongst all other simiraly equipped combos
Almost forgot ... them hot rod book boys ......
For all we know ... they did that test with no accessories and other little
gain inflating tricks they forgot to tell their readers about
Grady
Yeah, I have noticed that where the engines are run on an engine dyno, they're invariably without the power-robbing accessories that they'd have in a vehicle (alternator, PS pump, AC) and they use an electric water pump.
Let's not also forget another source of fudging which is the HP correction factor.
I'll break down all the stages as they tested them:
Simple bolt-ons: 275hp/331lbft
+ Edelbrock RPM intake: 293hp/317lbft
+ Edelbrock RPM heads: 372hp/361lbft
+ CompCams XE270HR-12 cam: 388hp/376lbft
Mind you, I've seen other H/C/I combos tested in magazines that have produced close to 400 flywheel HP so this one's not a flash in the pan.
with trick flow tw's, track heat intake, stock cam, 70mm tb, short belt, equal shorty headers, h-pipe and flows my car made 299rwhp.
and i found out when i pulled the motor that the heads, that all 8 intake valve seats were cut wrong and the valves were bent, from trick flow. they did fix the problem after i figured it out. makes me wonder what the car would have made without the bent valves.
a friend of mine has ported gt40's, b-cam and a track heat intake on a fox and the car made 290rw.
and i found out when i pulled the motor that the heads, that all 8 intake valve seats were cut wrong and the valves were bent, from trick flow. they did fix the problem after i figured it out. makes me wonder what the car would have made without the bent valves.
a friend of mine has ported gt40's, b-cam and a track heat intake on a fox and the car made 290rw.
thats pretty sad. I mean look at killer95stang he made 308rwhp with p heads. So what does everyone have against the gt40p heads with the right porter and the right set up u will make just as much if not more then these guys with aluminum heads.
No am am with you. For a budget the gt40's or even well ported e7's could do well in my o. If I had to spend the exact same $$ I would go Alums to save 43#. It's just the rwhp claims from mags that I don't completely buy. And I am a bias DD too in terms of driveability definitions. Thats another thread entirely tho.
I agree with you on that. the mag claims sometimes are sometimes a little extreme. And on the DD thing too, lol. Sure the 43lbs less is nice but ill just lose the 43 lbs on myself. Since i started im already down 20lbs, lol 23 more to go i guess, lol.
Here's an example of the difference between engine and chassis dyno numbers with the same engine:
Victory's Engine Dyno
The 306 on that page made 427hp/418lbft on the engine dyno (no PS pump/AC) while on the chassis dyno, it put down 344rwhp/360rwtq and Mark German is the lucky owner:
FordMuscle.com Forums - View Profile: mgerman93
Mark German's Stats
Victory's Engine Dyno
The 306 on that page made 427hp/418lbft on the engine dyno (no PS pump/AC) while on the chassis dyno, it put down 344rwhp/360rwtq and Mark German is the lucky owner:
FordMuscle.com Forums - View Profile: mgerman93
Mark German's Stats