K-code heads

66StangGuy · 09-18-2002, 07:13 PM

I was thinking of buying some k code heads from a friend of mine..there complete and rebuilt. i dont think there ported though im not shure. What kind of power increase am a looking at with my current mods? I currently have a stock cam but i will upgrade that later. I currently have 2bbl 289 or 2 bbl 302 heads. ill have to check my paperwork to be shure..thanks.

Jeff65 · 09-19-2002, 01:36 PM

I believe the heads have recesses for valve springs to permit heavier valve springs to support mechanical lifters. They also have screw in rocker arm studs vice pressed in to take the punishment of higher valve spring tension needed for high revs. I don't believe they'd produce higher hp unless used in connection with a performance camshaft. Modern heads are a better bet for high performance use with unleaded gas, GT40, ARP, etc. They flow a lot better which is the alternative to high compression ratio.

gofastmercury · 09-19-2002, 09:38 PM

I agree with jeff65 100%. The hipo heads arnt worth nothin unless your restoring a K-code car.

Rev · 09-20-2002, 01:54 PM

The 351W heads, milled some and pocket ported do very well on a 289/302. I used those on my 306 for several years before I went to TFTW heads. The 351W with 1.85/1.54 valves breathe plenty well for a mild/moderate 289 or 302 and will make good power with flat top pistons at about 9.5/1 CR.

Rev

66StangGuy · 09-21-2002, 03:10 AM

ok say i stay with the heads i have now...what would you suggest i get for a cam? i want to use the stock heads for now but i will probably get the 4bbl heads later. what would be the best cam for this? this is my everyday car and i dont need a really lumpy cam. stall converter is 2200.

Rev · 09-21-2002, 03:11 PM

I use a 268HE hydraulic flat tappet cam from Comp Cams. It's a good street cam for 300+ hp in a mildly modified 289/302. Good low end torque and up to 6000 RPM with heads, induction, headers, exhaust,etc.

Rev

66StangGuy · 09-23-2002, 01:54 AM

is there a noticable difference at idle with that cam?
what would this do for my gas milage? would this help it get better or make it worse because of the valves being open longer? just wondering becuse a friend of mine has a stock baraccuda with a huge cam and he gets 20+ mpg with a 4bbl on a 318 engine. thanks rev

Rev · 09-24-2002, 09:16 PM

My engine has a very mild lope at idle but does idle at 650-700 RPM in gear with a C-4. Has about 14-15" vacuum at that idle. I get only 14 MPG without being really very careful.

Rev

66StangGuy · 09-24-2002, 09:52 PM

sounds good...i have the same vaccume and idle rpm. so i guess that shouldnt change with the cam. Going from stock cam to the one you sugested should i see an increase in MPG?? or decrease assuming everything else is the same.

09-18-2002, 07:13 PM	#1
66StangGuy Registered Member Join Date: Feb 2002 Location: Diamond Bar Posts: 258	K-code heads I was thinking of buying some k code heads from a friend of mine..there complete and rebuilt. i dont think there ported though im not shure. What kind of power increase am a looking at with my current mods? I currently have a stock cam but i will upgrade that later. I currently have 2bbl 289 or 2 bbl 302 heads. ill have to check my paperwork to be shure..thanks. __________________ 66 mustang-292-Holley 4160-World Castings Windsor Sr.-Hooker super comp headers-MSD box & Coil.3.55 gears. B&M Z-Gate-Black leather racing seats with 4pt harnes. Last edited by 66StangGuy; 09-18-2002 at 07:19 PM..

09-19-2002, 09:38 PM	#3
gofastmercury Registered Member Join Date: May 2001 Location: calgary alberta canada Posts: 366	I agree with jeff65 100%. The hipo heads arnt worth nothin unless your restoring a K-code car. __________________ 93LXcopcarSOLD14.3@96 @ 4500ft 2.02 60ft on street tires. my 67 ranchero NOT A 390 ANY MORE! 460! 3.70's cast manifolds, comp cams 262H, performer, 750DP 100K out of 79 F250 NEW(oct20/02)14.58@95mph 2.3 60 ft corrects to:13.86@100 66 merc comet351w, isky roller 600 lift 268/260@.050, vic jr. 700DP, 5000stall, 4.56's c-4, 3400lbs with driver 12.3@110 @ 4000ft 1.69 60 ft corrects to:11.69@115

09-20-2002, 01:54 PM	#4
Rev Registered Member Join Date: Nov 1998 Location: Houston, Tx. Posts: 3,887	351W heads The 351W heads, milled some and pocket ported do very well on a 289/302. I used those on my 306 for several years before I went to TFTW heads. The 351W with 1.85/1.54 valves breathe plenty well for a mild/moderate 289 or 302 and will make good power with flat top pistons at about 9.5/1 CR. Rev __________________ '66 Coupe, 306, 350-375 HP, C-4, 13.07 e.t., 104.8 mph, 1/4 mi. O.B.C. #2 '66 coupe

09-21-2002, 03:10 AM	#5
66StangGuy Registered Member Join Date: Feb 2002 Location: Diamond Bar Posts: 258	camshaft ok say i stay with the heads i have now...what would you suggest i get for a cam? i want to use the stock heads for now but i will probably get the 4bbl heads later. what would be the best cam for this? this is my everyday car and i dont need a really lumpy cam. stall converter is 2200. __________________ 66 mustang-292-Holley 4160-World Castings Windsor Sr.-Hooker super comp headers-MSD box & Coil.3.55 gears. B&M Z-Gate-Black leather racing seats with 4pt harnes.

09-21-2002, 03:11 PM	#6
Rev Registered Member Join Date: Nov 1998 Location: Houston, Tx. Posts: 3,887	268HE I use a 268HE hydraulic flat tappet cam from Comp Cams. It's a good street cam for 300+ hp in a mildly modified 289/302. Good low end torque and up to 6000 RPM with heads, induction, headers, exhaust,etc. Rev __________________ '66 Coupe, 306, 350-375 HP, C-4, 13.07 e.t., 104.8 mph, 1/4 mi. O.B.C. #2 '66 coupe

09-19-2002, 01:36 PM	#2
Jeff65 Registered Member Join Date: Jul 2002 Location: Oklahoma City Posts: 208	I believe the heads have recesses for valve springs to permit heavier valve springs to support mechanical lifters. They also have screw in rocker arm studs vice pressed in to take the punishment of higher valve spring tension needed for high revs. I don't believe they'd produce higher hp unless used in connection with a performance camshaft. Modern heads are a better bet for high performance use with unleaded gas, GT40, ARP, etc. They flow a lot better which is the alternative to high compression ratio.

09-23-2002, 01:54 AM	#7
66StangGuy Registered Member Join Date: Feb 2002 Location: Diamond Bar Posts: 258	is there a noticable difference at idle with that cam? what would this do for my gas milage? would this help it get better or make it worse because of the valves being open longer? just wondering becuse a friend of mine has a stock baraccuda with a huge cam and he gets 20+ mpg with a 4bbl on a 318 engine. thanks rev __________________ 66 mustang-292-Holley 4160-World Castings Windsor Sr.-Hooker super comp headers-MSD box & Coil.3.55 gears. B&M Z-Gate-Black leather racing seats with 4pt harnes.

09-24-2002, 09:16 PM	#8
Rev Registered Member Join Date: Nov 1998 Location: Houston, Tx. Posts: 3,887	Mild lope My engine has a very mild lope at idle but does idle at 650-700 RPM in gear with a C-4. Has about 14-15" vacuum at that idle. I get only 14 MPG without being really very careful. Rev __________________ '66 Coupe, 306, 350-375 HP, C-4, 13.07 e.t., 104.8 mph, 1/4 mi. O.B.C. #2 '66 coupe

09-24-2002, 09:52 PM	#9
66StangGuy Registered Member Join Date: Feb 2002 Location: Diamond Bar Posts: 258	sounds good...i have the same vaccume and idle rpm. so i guess that shouldnt change with the cam. Going from stock cam to the one you sugested should i see an increase in MPG?? or decrease assuming everything else is the same. __________________ 66 mustang-292-Holley 4160-World Castings Windsor Sr.-Hooker super comp headers-MSD box & Coil.3.55 gears. B&M Z-Gate-Black leather racing seats with 4pt harnes.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
New FRP Heads for 96 - 98 4.6	surfbeast	Modular Madness	9	11-21-2002 07:02 PM
will 99-2002 cams out of the pi heads fit in the 96-98 stock heads	slow98	Modular Madness	6	10-25-2002 04:28 PM
GT-40 heads	5.0 Pony	Windsor Power	1	09-10-2002 10:26 PM
What kind of Windsor heads?	vetteeatr	Windsor Power	11	10-28-2001 03:43 AM
Which heads are beter?	patman	Classic Mustangs	3	12-02-1999 03:42 AM