1964 427 Hi Rise motor now a 482. What HP #'s are REALISTIC

[Stampeed]

I'm new here so please excuse me if this has been covered. I have been running a 64 hi rise top oiler in a 64 Fairlane. It's time for a winter rebuild and have decided on a 482. My heads are full race ported and larger than stock valves on original 64 hi rise heads. They flow 350 at .750 lift and the additional work and $ required to gain a few cfm doesn't seem worth it. Lunati has custom ground a .752 lift long duration roller cam they recommended. It's a 12:1 compression motor running Sunoco 112. Original dual quad mainifold port matched with 750 Holley's. T&D 1.8-1 roller rockers.
I read about these 750hp dyno numbers. Is this achievable with my heads? Most of what I read are big numbers through Blue Thunder or other aftermarket heads. Want to stay nolstalgic. I'm expecting more along the line of 650-675hp with 600+ ft lb of torque.
Thoughts please. Suggestions?

[thatdarncat]

I don't have any first hand High Riser experience, but I can anticipate some of the questions the gang are going to ask, and they're going to want some more detailed information. First off is exactly which casting 2-4v intake do you have? My understanding is the earlier castings are down quite a bit on power potential compared to the later versions. Ford changed the runner pattern quite a bit. Then - what valve sizes? cam specs exactly? Which Holley 750's - are they vacuum secondary or double pumpers? I will say 750 hp is possible with the right combination of parts. Guys are running well into the 8's with Thunderbolts in NHRA Super Stock and 9's in Stock and they are not allowed strokers. I don't have access right now to the NHRA engine specs info, but traditionally they have had to run the original Ford cast iron head castings for the High Riser combination.

[Barry_R]

Not exactly like your's - - but unported heads and lower compression still gets close to 600....

http://www.network54.com/Forum/74182/message/1452004388/Have%27t+done+a+write+up+for+a+little+while...427+High+Riser+combo+on+the+dyno

[jayb]

General rule of thumb is that if everything is optimized, you can get about 2.1HP per cfm of intake flow, and a little more if you've got it really dialed in.  Assuming your flow numbers are real, you should be able to get over 700 HP.  The dual plane intake will hold you back some, though, especially if it is the earlier version as Kevin mentioned.  I think your 650-675 HP estimate is pretty close, and I wouldn't be surprised to see 620 ft-lbs...

[Stampeed]

Intake #C4AE-9425-D WITH 2-750 VACCUUM CARBS. HEADS C4AE-6090-F Valves 2.250 intake 1.70 exhaust.
Lunati Roller Cam and lifters: 272-280 @ .50
                                           418 lobe lift X 1.8-1 T&D = .752
                                           110 lobe separation
                                           106* @ intake centerline
                                           
Thanks for the feedback so far. If there's any other info needed please ask. Appreciate any and all info. I'm smart enough to know I don't know everything.
Thanks

[ScotiaFE]

Got any pictures of this animal?
Using a clutch?
You know the kool stuff.

[Stampeed]

yes a dual disc and a Jerico 4spd.
ROW TO GO.
tried the pic but it seems that the pic files i have are too big.

[ScotiaFE]

Rowing the Jerico.
My fav past time.

I could get the pictures up if you need help.

[Stampeed]

I'd appreciate the help. How do I send u pic?

[ScotiaFE]

Send it here.
Heading out for movie night now, so later on tonight I can put it up for you.
My pic tonight. Yee Haw. Watching the duster,  The Hateful Eight.

390fairlane@gmail.com

[Nightmist66]

Got any pictures of this animal?
Using a clutch?
You know the kool stuff.

yes a dual disc and a Jerico 4spd.
ROW TO GO.
tried the pic but it seems that the pic files i have are too big.

Awesome!   Can't wait to see pics.

[BH107]

Intake #C4AE-9425-D WITH 2-750 VACCUUM CARBS. HEADS C4AE-6090-F Valves 2.250 intake 1.70 exhaust.
Lunati Roller Cam and lifters: 272-280 @ .50
                                           418 lobe lift X 1.8-1 T&D = .752
                                           110 lobe separation
                                           106* @ intake centerline
                                           
Thanks for the feedback so far. If there's any other info needed please ask. Appreciate any and all info. I'm smart enough to know I don't know everything.
Thanks

The C4AE-9425-F is supposedly the better of the 2 factory intakes, rumors of 40hp back in the day but an old post from Blair said it wasn't so on his SS engines.

[Stampeed]

The last letter of the casting id is the letter D indicating that this is the 4th generation hi rise intake.
There was some question earlier that the early castings weren't as good but it's difficult to determine at which point major design improvements occurred. The runners have been worked extensively by my machinist and port matched so it's all it can be and don't want aftermarket.
Have a tentative date with the dyno on Friday.
WOOOOOOHOOOOOOO!

[CaptCobrajet]

It really depends on how you go about it.  We did one for a gentleman in Connecticut who wanted iron heads/stock appearing outside.  He had 715's and an F intake.  The heads had no epoxy in the intake port, and no brass in the exhaust, but about as far as I could go without doing that....they did not flow 350 on my bench.  We made 775 hp, 710 tq at 496 cubes in a Ford topoiler drilled for lifter oil. It took some creative machining to use the race T&D, but it is reliable and clicks off mid-9's on a good racetrack. Expect 15-20 less average hp in a combo like that with the D manifold.  It is only 10 hp less average on a 700 hp 427, but trends showed the difference would grow as power and inches increase.  The D showed better torque below peak torque, and less power above peak torque than the F manifold on a 427.

[Stampeed]

Curious as to how different my cam specs are to his and what carbs were used?