Highest N/A 4.6 Power

GT04Mustang · Dec 7, 2006

Well guys it's pretty simple.

Looking for the highest 4.6 N/A RWHP, and graphs and what kind of dyno's it was on. Stand Alone systems to SCT tuned... Please no "I THINK THEY'VE DONE THIS!!!" and NO NEGATIVITY, if you doubt it, ask for a list and graph...

If you guys would, state if it is on 93 pump or 100or etc fuel....

The reason I'm asking... very curious and I have a 12.3:1 N/A motor... it's making good power around 337 rwhp and 345rwtrq. Will be posting a graph soon once i get home to my computer... Just curious to what other N/A guys are making.

Rocketman · Dec 7, 2006

I doubt your making that much on a stock bore and stroke. You said 4.6L.

GT04Mustang · Dec 7, 2006

Rocketman said:
I doubt your making that much on a stock bore and stroke. You said 4.6L.

Well... it's a 4.6 STOCK BORE AND STROKE 12.3 :1 compression. Stg 3 Comp N/A Cams, Stg 3 MMR Heads, And full bolt ons with stock manifold... (I have a HPS Hard Ball R at the shop being powder coated as we speak then it goes on... PM Full a full list if you like.

Why is it the the first response is "YOUR NOT MAKING THAT!!!"?????

Thanks man...

merc123 · Dec 7, 2006

GT04Mustang said:
Why is it the the first response is "YOUR NOT MAKING THAT!!!"?????

Because it's not typical. You're different

streetstang03 · Dec 7, 2006

meh...i dont believe it either

Matt's 03 GT · Dec 7, 2006

That's the highest I have ever heard of!!! Great job... let us know what it took to get there.

By the way, what do you run in the 1/4 mile? And do you know what the car weighs?

san~man · Dec 7, 2006

VT holds the record for N/A, not stock bore or stroke though.

GT04Mustang · Dec 7, 2006

san~man said:
VT holds the record for N/A, not stock bore or stroke though.

Any ideas of what N/A 4.6's are mak'n???? And what is VT's record?

I understand it's NOT normal...but how many high compression stangs have been built? What I've built isn't normal. And the car ways 3397lbs with the amp rack and subs (MACH 100 system) and spare tire and jack, and 1/2 tank of gas. It was weighed at Roebling Road's scale in Savannah GA and it's ceritified because they race there.

I should be home tomarrow... in PA right now.... goin back tomarrow.

jstreet0204 · Dec 7, 2006

I can see you making that much on that compression, but I wouldn't have thought you'd do it on pump gas. I'm sure it is a mean motor on race gas, more so with some nitrous.

GT04Mustang · Dec 7, 2006

jstreet0204 said:
I can see you making that much on that compression, but I wouldn't have thought you'd do it on pump gas. I'm sure it is a mean motor on race gas, more so with some nitrous.

Well it suppose to be ran on 110 (Which hasn't been done yet ) but i have built if for nitrous, so those will be coming soon.

san~man · Dec 7, 2006

GT04Mustang said:
Any ideas of what N/A 4.6's are mak'n???? And what is VT's record?

I understand it's NOT normal...but how many high compression stangs have been built? What I've built isn't normal. And the car ways 3397lbs with the amp rack and subs (MACH 100 system) and spare tire and jack, and 1/2 tank of gas. It was weighed at Roebling Road's scale in Savannah GA and it's ceritified because they race there.

I should be home tomarrow... in PA right now.... goin back tomarrow.

N/A 4.6, I believe the MD car holds the record. I gotta dig up the numbers, but I'm pretty sure he's 4.6.

Now, you didn't specify 2V or 4V, which makes a big difference.

FoxRod87 · Dec 7, 2006

sounds good keep us up to date. are you running 93 octane?

san~man · Dec 7, 2006

Here's Ken B's old #'2, 2V 4.6L

368 RWHP / 359 RWTQ

DropTopPony · Dec 7, 2006

Are we talking stock displacement 4.6 or 4.6 based and 2V or 4V etc etc...Lots of guys making 400+ with 4V's and supposed to be a few 2V big bores over the 400rwhp also but thats not 4.6 anymore...Now KenB was at 360rwhp with his 4.6 2V and ran 10.8's.

jstreet0204 · Dec 7, 2006

This is the highest I've seen. You'll have to fill in the blanks for MD

http://www.************.com/?show=articlesdet&aid=43

GT04Mustang · Dec 8, 2006

Yes I'm still on 93 pump gas, and your right i didn't specify 2V, but that is what I am look'n for, 2V. Was Ken B's number's on 93 or higher octane?

se7en-zero · Dec 8, 2006

KenB was on 100 octane, Dynojet with an unspecified correction factor and ummmm....well, you be the judge of the tune...

I think there is a new High HP record coming....!

LaserRed01GT · Dec 8, 2006

337 to the tire is easy on a stock bore and stroke, especially with that static CR. When I was ordering my camshafts a few weeks back and I was researching the common RWHP numbers for N/A stock bore/stroke 4.6 2V's. I talked to VT Engines, Coastal Dyno (here in Tampa), Combination Motorsports in Vegas and several others. They all basically said the same thing, that a N/A stock bore/stroke 4.6 2V with fully ported heads, 1mm oversize valves, and the XE270AH cams I should expect AT LEAST 350 RWHP. If not something wasn't right. Sam over at Coastal Dyno even took the time to show me a few of those pulls on his computer.

Another thing....static compresion ratio is not what dictates how well a motor will run on pump gas or not. Dynamic CR is what dictates that. DCR incorporates the IVC (advertised intake valve closing point) to determing the dynamic compression ratio. Compression does not begin until the intake valve closes so engine builders will use the IVC to determine the dynamic stroke and in turn use that to determine the DCR which will give them a good idea of how well a motor will run on 93 or less. Usually you want to stay around a 9.0 DCR or less to effectively run on pump gas.

The larger the cam (more duration) the later the IVC, and consequently the lower the DCR and the easier the motor can run on pump gas.

I already know your bore/stroke. If you can provide me with the following I can calculate your compression height (quench) and DCR for you:

1. combustion chamber volume
2. piston to deck clearance (piston in the hole)
3. head gasket bore
4. head gasket compressed (installed) thickness
5. piston volume (valve reliefs)

san~man · Dec 9, 2006

Quite honestly, I don't remember but a few cars (Ken's being one of them) that made 350RWHP with cams, heads, valves, and even LT's. Most are in the 33X's, and maybe 1 or 2 in the 34X's.

It's honestly easier said than done.

mustangman9812 · Dec 9, 2006

Dang that is still flying 10.8's

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