Author Topic: Guess the horsepower  (Read 814 times)

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fastback 427

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Guess the horsepower
« on: August 22, 2026, 07:53:15 AM »
Finally finished the 427 for my mustang. It was an older build, high compression 427, 428 crank, Dove top end. I was tired of the race gas pain so wanted pump gas. The stroker kit was from Blair, Scat forged 4.25, molnar rods, diamond pistons. R and R in Minnesota did the machine work. I had picked a cam from Bullet, solid flat tappet, for my Dove heads. In the time after, the trick flows came out, so I ordered a set from Brent, he had them ported a bit, and set them up for my cam. I will say we were nervous about breaking it in, due too the big lift, so he used beehive springs, titanium everything else, and a light spring pressure. The intake is a Dove single plane with a dominator top welded on.
So basically it is a 488 cube, 11 to 1, pump gas, not ideal cam, 1050 carb. I will post numbers after some guesses.
Jaime
67 fastback 427 center oiler 428 crank Dove aluminum
top end toploader
67 fairlane gta cross bolted 12:1 390 Dove aluminum top end c6 3600 stall
65 falcon straight axle project
67 mustang coupe project
76 f350 dually 390 mirror 105 4bbl 4spd
74 f100 xlt 390 c6 factory ac

frnkeore

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Re: Guess the horsepower
« Reply #1 on: August 22, 2026, 11:37:32 AM »
It would be helpful to have the cam details.
Frank

'60 Ford Starliner
'61 Fairlane 500
Austin Healey Replica with 427 & 8.5 Cert

fastback 427

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Re: Guess the horsepower
« Reply #2 on: August 22, 2026, 11:53:10 AM »
.693 int. 688 ex. 263/ 270 at 50 108 lobe.
Jaime
67 fastback 427 center oiler 428 crank Dove aluminum
top end toploader
67 fairlane gta cross bolted 12:1 390 Dove aluminum top end c6 3600 stall
65 falcon straight axle project
67 mustang coupe project
76 f350 dually 390 mirror 105 4bbl 4spd
74 f100 xlt 390 c6 factory ac

cjshaker

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Re: Guess the horsepower
« Reply #3 on: August 22, 2026, 01:53:32 PM »
I'll play
605 hp
Doug Smith


'69 R-code Mach 1, 427 MR, 2x4, Jerico, 4.30 Locker
'70 F-350 390
'55 Ford Customline 2dr
'37 Ford Coupe

chilly460

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Re: Guess the horsepower
« Reply #4 on: August 22, 2026, 02:19:53 PM »
675

blykins

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Re: Guess the horsepower
« Reply #5 on: August 22, 2026, 02:26:01 PM »
685
Brent Lykins
Lykins Motorsports
Custom FE Street, Drag Race, Road Race, and Pulling Truck Engines
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www.lykinsmotorsports.com
brent@lykinsmotorsports.com
www.customfordcams.com
502-759-1431
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fastback 427

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Re: Guess the horsepower
« Reply #6 on: August 22, 2026, 02:58:15 PM »
She might be a bit of an over achiever..  723.1 HP, 638 tq

Jaime
67 fastback 427 center oiler 428 crank Dove aluminum
top end toploader
67 fairlane gta cross bolted 12:1 390 Dove aluminum top end c6 3600 stall
65 falcon straight axle project
67 mustang coupe project
76 f350 dually 390 mirror 105 4bbl 4spd
74 f100 xlt 390 c6 factory ac

Dumpling

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Re: Guess the horsepower
« Reply #7 on: August 22, 2026, 05:42:31 PM »
505 HP

Stangman1

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Re: Guess the horsepower
« Reply #8 on: August 22, 2026, 06:56:02 PM »
Wow nice setup. Love a solid flat tapper. Nothing sounds better.

cjshaker

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Re: Guess the horsepower
« Reply #9 on: August 23, 2026, 12:23:42 AM »
She might be a bit of an over achiever..  723.1 HP, 638 tq

Almost, 1.5 hp per CI, I'll say! Wow, was I way off. I should have allowed more for the heads and lift....alot more.
Doug Smith


'69 R-code Mach 1, 427 MR, 2x4, Jerico, 4.30 Locker
'70 F-350 390
'55 Ford Customline 2dr
'37 Ford Coupe

My427stang

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Re: Guess the horsepower
« Reply #10 on: August 23, 2026, 07:12:04 AM »
Nice work!
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Ross
Bullock's Power Service, LLC
- 70 Fastback Mustang, 489 cid FE, Victor, SEFI, Erson SFT cam, TKO-600 5 speed, 4.11 9 inch.
- 71 F100 shortbed 4x4, 461 cid FE, headers, Victor Pro-flo EFI, Comp Custom HFT cam, 3.50 9 inch

fastback 427

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Re: Guess the horsepower
« Reply #11 on: August 23, 2026, 12:40:24 PM »
Thanks for the comments guys, very happy with how this turned out, should motivate my mustang pretty damn good.
Jaime
67 fastback 427 center oiler 428 crank Dove aluminum
top end toploader
67 fairlane gta cross bolted 12:1 390 Dove aluminum top end c6 3600 stall
65 falcon straight axle project
67 mustang coupe project
76 f350 dually 390 mirror 105 4bbl 4spd
74 f100 xlt 390 c6 factory ac

1967 XR7 GT

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Re: Guess the horsepower
« Reply #12 on: August 26, 2026, 07:49:12 AM »

So basically it is a 488 cube, 11 to 1, pump gas, not ideal cam, 1050 carb. I will post numbers after some guesses.

After the results of 723.1 HP, 638 tq and state a bit of an over achiever., why would you then say "not ideal cam" ?

I see a combination that worked and made really good numbers. What were the heads flow numbers ?
Richard

 "Frankly, I'm tired of hearing all the complaints; makes me wonder why I bother hosting this forum."

fastback 427

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Re: Guess the horsepower
« Reply #13 on: August 26, 2026, 07:29:39 PM »
1967 XR7 GT, That cam was picked for my set of dove medium riser heads, definitely different flow, runner size and chamber. Not sure how much that affects it but I was told a different cam would help. For what it's worth, I am extremely happy with the results, hopefully the track times back it up.
Jaime
67 fastback 427 center oiler 428 crank Dove aluminum
top end toploader
67 fairlane gta cross bolted 12:1 390 Dove aluminum top end c6 3600 stall
65 falcon straight axle project
67 mustang coupe project
76 f350 dually 390 mirror 105 4bbl 4spd
74 f100 xlt 390 c6 factory ac