[ponchjoe]

I have been reading old threads and posting some here and there while I develop my build, I think I’m there now. The car is a street and highway cruiser only with A/C and power brakes, needs to have good manners. I’m a stock performance type of guy. But want it to pull all the way to 5500.

I am looking for recommendations for both HFT or HR and springs needed.

Here’s the combo:

67 LeMans
400 .040
4” stroke crank
New 6.625 rods
AutoTec Pistons (dished to 9.5/9.6 compression)
Stock 670 heads
Stock 68 iron intake
Rebuilt 78 Qjet
HO manifolds with 2.5” pipe
2004r with a 2200 stall
3.55 LS with 27” tires

Let me know your thoughts and as always I appreciate your insight.

[steve25]

I guess you did not like any of the answers you got before?

[ponchjoe]

Originally Posted by steve25

I guess you did not like any of the answers you got before?

I was working through what I wanted to build and gathering information. And I don’t believe you ever offered a cam selection when I asked

[tom s]

Stump puller.Tom

[Bruce Meyer]

Summit 2802 for HFT for HR none recommended. For springs you need to know installed height to properly pick. When you have that info contact Butler Performance and they will recommend a set

[Jay S]

That is a COOL photo of your car!

https://www.howardscams.com/hydrauli...cams-414345-12

[steve25]

Sorry. I thought you did.
There’s been so many of them as of late!

Here’s some recommendations that will not fail you duration wise as long as you have a minimum 9 to 1 compression a long with the rear gears

Lift wise with stock 670 heads installed height your good to .460” lift with fresh springs .

I would try and run between.450” and .500” lift since that will help make torque and improve throttle response.

If you’re not going to have the minimum 9 to 1 compression then pick a car of less duration.

On the street it’s best to be a tad under cammed then over.

[ponchjoe]

Originally Posted by tom s

Stump puller.Tom

I looked at that but it seems too big

[tom s]

Few more CI,stock 48 heads

http://forums.maxperformanceinc.com/...d.php?t=804201

[b-man]

Your 4” stroked 400 with 670 heads and HO exhaust manifolds is essentially a stock 1967 428 HO.

Stick the manual trans 390 hp 428 HO cam in it.

Use the factory 068 and spice it up with some stamped steel RAIV 1.65:1 rockers. Be just fine with stock 1.5:1 rockers too.

I ran that setup on my last daily driver 455 topped with a ‘66 Tri-Power exhausting through ‘67 HO manifolds and it ran past 5000 rpm no problem.

https://forums.maxperformanceinc.com...22&postcount=4

99.9% of the time you won’t be above 3000 rpm so why put some big cam in it?

[Jay S]

You might look at the Bulter RAM AIR Series HR cams if you want stock type performance like described. The 068 and 744 version only have .45” lift and look like they would be easier on parts than the off the self HR cams.

I wouldn’t be very interesting in running any kind of new hydraulic flat tappet cam unless the cam was Nitrided. Even a little 068 replica. By the time that is added to the cost, and new HLJ lifters now cost well over $200, running a new HFT is not really a cheap option these days. Quality seems to keep getting worse on flat tappet cam components.

I did a cam to replaced a 068 with 1.65 rockers in a low 9s compression 455. It idles about the same, and drives the same but seems to have another 40 HP. The car has 3.07 gears and A/C. It was a Bullet HFT.

I have very nice used 224/230 HR cam like Tom linked in that thread.(432HP). It is just sitting on the shelf here if you want a cheaper HR option. I bought it because it was going to cost just as much do to a similar HFT cam. I have since went with a bigger cam. If your hiring stuff done, or put a value on your time, and choose a cam that needs the inner springs reinstalled after break in, that gets you part way to the extra cost of a HR cam. That 224/230 cam takes a bronze or composite distributer gear. The Howard’s I listed uses a stock gear, and is actually a little gentler profile even though it has extra lift. The Howard’s is a better profile IMHO. I would use Crower 68405 springs set up at either 1.6 or 1.62” IH with all those HR cams. With longer valve I would use a negative .050” valve lock and shim them to where you want.

[ponchjoe]

Thanks Jay. I have a 702 Voodoo but thought it might be a little small after talking to the guy at Bullet. I have a set of HLJ lifters too.

Advertised Duration (Int/Exh): 262/268
• Duration @.050 (Int/Exh): 219/227
• Gross Valve Lift (Int/Exh): .468/.489
• LSA/ICL: 112/108
• Valve Lash (Int/Exh): Hyd/Hyd
• RPM Range: 1300-5500

Originally Posted by Jay S

You might look at the Bulter RAM AIR Series HR cams if you want stock type performance like described. The 068 and 744 version only have .45” lift and look like they would be easier on parts than the off the self HR cams.

I wouldn’t be very interesting in running any kind of new hydraulic flat tappet cam unless the cam was Nitrided. Even a little 068 replica. By the time that is added to the cost, and new HLJ lifters now cost well over $200, running a new HFT is not really a cheap option these days. Quality seems to keep getting worse on flat tappet cam components.

I did a cam to replaced a 068 with 1.65 rockers in a low 9s compression 455. It idles about the same, and drives the same but seems to have another 40 HP. The car has 3.07 gears and A/C. It was a Bullet HFT.

I have very nice used 224/230 HR cam like Tom linked in that thread.(432HP). It is just sitting on the shelf here if you want a cheaper HR option. I bought it because it was going to cost just as much do to a similar HFT cam. I have since went with a bigger cam. If your hiring stuff done, or put a value on your time, and choose a cam that needs the inner springs reinstalled after break in, that gets you part way to the extra cost of a HR cam. That 224/230 cam takes a bronze or composite distributer gear. The Howard’s I listed uses a stock gear, and is actually a little gentler profile even though it has extra lift. The Howard’s is a better profile IMHO. I would use Crower 68405 springs set up at either 1.6 or 1.62” IH with all those HR cams. With longer valve I would use a negative .050” valve lock and shim them to where you want.

[ponchjoe]

Thanks Bman, that’s a very similar build

Originally Posted by b-man

Your 4” stroked 400 with 670 heads and HO exhaust manifolds is essentially a stock 1967 428 HO.

Stick the manual trans 390 hp 428 HO cam in it.

Use the factory 068 and spice it up with some stamped steel RAIV 1.65:1 rockers. Be just fine with stock 1.5:1 rockers too.

I ran that setup on my last daily driver 455 topped with a ‘66 Tri-Power exhausting through ‘67 HO manifolds and it ran past 5000 rpm no problem.

https://forums.maxperformanceinc.com...22&postcount=4

99.9% of the time you won’t be above 3000 rpm so why put some big cam in it?

[Jay S]

Originally Posted by ponchjoe

Thanks Jay. I have a 702 Voodoo but thought it might be a little small after talking to the guy at Bullet. I have a set of HLJ lifters too.

Advertised Duration (Int/Exh): 262/268
• Duration @.050 (Int/Exh): 219/227
• Gross Valve Lift (Int/Exh): .468/.489
• LSA/ICL: 112/108
• Valve Lash (Int/Exh): Hyd/Hyd
• RPM Range: 1300-5500

702 is a little small, but it should work ok as the compression isn’t to high. Bullet has better options (HFT or HR) if you want to do something custom.

[Dragncar]

2802 would run great on that engine. Get some old lifter resurfaced and run it.

[Kenth]

I´m running a true #744 cam in my newly built 1965 421 (4.16" x 4.00") with #64 heads with used #48 heads valvesprings. 1966 Tri-Power, TH400 and 3.07 gears in the 12-bolt rearend.
Runs awesome with an exhaust note thru the Pypes 2.5 system w/14" street mufflers at idle to die for.

[ponchjoe]

I came across this Comp HFT, is it too hot for this combination?

RPM Operating Range: 2,000-6,000
Cam Type: Hydraulic Flat Tappet
Camshaft Series: Drag Race
Camshaft Gear Attachment: 1-Bolt
Usage: Street/Strip
California Proposition 65: WARNING:
Cancer and Reproductive Harm
P65Warnings.ca.gov
Advertised Intake Duration: 276
Advertised Exhaust Duration: 284
Intake Duration at .050 Inch Lift: 228
Exhaust Duration at .050 Inch Lift: 236
Intake Valve Lift: 0.52
Exhaust Valve Lift: 0.52
Lobe Lift Intake: 0.316
Lobe Lift Exhaust: 0.316
Lobe Separation: 110
Intake Centerline: 106
Valve Timing Lift: 0.006
Exhaust Close ATDC: 28
Intake Open BTDC: 32
Exhaust Open BBDC: 76
Intake Close ABDC: 64
Lifter Style: Hydraulic Flat Tappet

[Jay S]

Originally Posted by ponchjoe

I came across this Comp HFT, is it too hot for this combination?

RPM Operating Range: 2,000-6,000
Cam Type: Hydraulic Flat Tappet
Camshaft Series: Drag Race
Camshaft Gear Attachment: 1-Bolt
Usage: Street/Strip
California Proposition 65: WARNING:
Cancer and Reproductive Harm
P65Warnings.ca.gov
Advertised Intake Duration: 276
Advertised Exhaust Duration: 284
Intake Duration at .050 Inch Lift: 228
Exhaust Duration at .050 Inch Lift: 236
Intake Valve Lift: 0.52
Exhaust Valve Lift: 0.52
Lobe Lift Intake: 0.316
Lobe Lift Exhaust: 0.316
Lobe Separation: 110
Intake Centerline: 106
Valve Timing Lift: 0.006
Exhaust Close ATDC: 28
Intake Open BTDC: 32
Exhaust Open BBDC: 76
Intake Close ABDC: 64
Lifter Style: Hydraulic Flat Tappet

That is a what Comp called the 276AH10 with Magnum HFT profiles, the rated lift with 1.65 rockers. It is fairly similar to a 703 Voodoo, but the voodoo will make a little more power and out perform it some (if both cams had the same rocker arm ratios). The 703 has a bit smoother idle. A 276AH10 has a very similar power band to the 702 you have. I think you would like the 702 over a 276AH10 for how your car is set up.

[ponchjoe]

Originally Posted by Jay S

That is a what Comp called the 276AH10 with Magnum HFT profiles, the rated lift with 1.65 rockers. It is fairly similar to a 703 Voodoo, but the voodoo will make a little more power and out perform it some (if both cams had the same rocker arm ratios). The 703 has a bit smoother idle. A 276AH10 has a very similar power band to the 702 you have. I think you would like the 702 over a 276AH10 for how your car is set up.

Thanks Jay.
I wish the 703 was available (well, Edelbrock says they can grind one still) I thought it was perfect. The Crower 60916 may be a thought too.
INT/EXH - Dur @ .050” Lift: 221°/229° RR: 1.5/1.5 Gross Lift: .455”/.470” LSA: 112° RPM: 2000 to 4800 Redline: 5300

[b-man]

I would do the 60916.