horse power and cubic inch size

speedie66 · 06-23-2000, 10:57 PM

I am fairly new to engine rebuilding... But I rebuilt my 289 in my stang.. I had to bore it 30 over.. i have been told it is now a 293 does that sound right? also I was wondering if you guys might have an estimate on horsepower for the engine being bored 30 over, and it running tri y headers, dual exhaust, 600 cfm carb, 270 cam, slightly stronger than stock valve springs, valve job was done, port and polished heads.. thats all of the infor i can think of now.

Joe

------------------
66 mustang 289x.30 over, holley 600 cfm carb,c4 trans,rebuilt engine, 270+ hp

thunderbolt · 06-25-2000, 10:54 AM

Hi Joe, I will take a stab at this one. Your 289 bored .030 over should indeed be about a 293. With the combo you have described I would give you between 240 and 275 hp. It sounds to me like a good combo for your engine.

speedie66 · 06-26-2000, 11:16 AM

thanx.. Someday I guess I should get it put on a dyno

------------------
66 mustang 289x.30 over, holley 600 cfm carb,c4 trans,rebuilt engine, 270+ hp

Rev · 06-27-2000, 07:30 PM

My '66 with a 306 CID produces 300-310HP, depending whether you are using standard dyno conditions or SAE. With my C-4, rated at about 75% driveline effifiency, I get 223.3 SAE HP at the rear wheels (DynoJet). 223.5/.75=298 SAE HP. Add 4.5% to get standard dyno conditions and this is about 311 Hp. Look at my sig for my mods. I'd expect 1 HP/CI with your set up if it's tuned well and with good short block and head prep.
I had to do a lot of small stuff to get mine. Windage tray, crank scraper, Roller tip rockers, stub stack, home made cold air/ ram air system, under drive pulleys, optimizing fuel delivery and spark curve. Lots of trial and error here over a quite a while. I bet you can get 1 HP/CI if you work at it.

Rev

------------------
'66 Coupe, 306, windage
tray, TRW flat tops, 351W
heads,pocket ported, 268
CC hydraulic cam, R tip
R's, Edelbrock Performer,
600 CFM Holley vac. secs.,
Mallory Unilite, coil, fuel
pump, Tri-Y headers, 2 1/2 "
custom pipes, 3 chamber
Flows, stock C-4, 3.25
Currie built 8" rear,
March under drive pulleys,
13.97 e.t., 100.1 mph
1/4 mi.

06-23-2000, 10:57 PM	#1
speedie66 Registered Member Join Date: Jun 2000 Location: glendale arizona Posts: 22	horse power and cubic inch size I am fairly new to engine rebuilding... But I rebuilt my 289 in my stang.. I had to bore it 30 over.. i have been told it is now a 293 does that sound right? also I was wondering if you guys might have an estimate on horsepower for the engine being bored 30 over, and it running tri y headers, dual exhaust, 600 cfm carb, 270 cam, slightly stronger than stock valve springs, valve job was done, port and polished heads.. thats all of the infor i can think of now. Joe ------------------ 66 mustang 289x.30 over, holley 600 cfm carb,c4 trans,rebuilt engine, 270+ hp

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06-25-2000, 10:54 AM	#2
thunderbolt Registered Member Join Date: Oct 1998 Location: Houston, TX, USA Posts: 380	Hi Joe, I will take a stab at this one. Your 289 bored .030 over should indeed be about a 293. With the combo you have described I would give you between 240 and 275 hp. It sounds to me like a good combo for your engine.

06-26-2000, 11:16 AM	#3
speedie66 Registered Member Join Date: Jun 2000 Location: glendale arizona Posts: 22	thanx.. Someday I guess I should get it put on a dyno ------------------ 66 mustang 289x.30 over, holley 600 cfm carb,c4 trans,rebuilt engine, 270+ hp

06-27-2000, 07:30 PM	#4
Rev Registered Member Join Date: Nov 1998 Location: Houston, Tx. Posts: 3,887	My '66 with a 306 CID produces 300-310HP, depending whether you are using standard dyno conditions or SAE. With my C-4, rated at about 75% driveline effifiency, I get 223.3 SAE HP at the rear wheels (DynoJet). 223.5/.75=298 SAE HP. Add 4.5% to get standard dyno conditions and this is about 311 Hp. Look at my sig for my mods. I'd expect 1 HP/CI with your set up if it's tuned well and with good short block and head prep. I had to do a lot of small stuff to get mine. Windage tray, crank scraper, Roller tip rockers, stub stack, home made cold air/ ram air system, under drive pulleys, optimizing fuel delivery and spark curve. Lots of trial and error here over a quite a while. I bet you can get 1 HP/CI if you work at it. Rev ------------------ '66 Coupe, 306, windage tray, TRW flat tops, 351W heads,pocket ported, 268 CC hydraulic cam, R tip R's, Edelbrock Performer, 600 CFM Holley vac. secs., Mallory Unilite, coil, fuel pump, Tri-Y headers, 2 1/2 " custom pipes, 3 chamber Flows, stock C-4, 3.25 Currie built 8" rear, March under drive pulleys, 13.97 e.t., 100.1 mph 1/4 mi.