[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

[Jay S]

I think a Summit 2802 would be better than a 60916 with 670 heads and a 4” crank. The 60916 would have been a good choice if you had a later open chamber head, 3.75 crank, or less compression with the 4”.

[ponchjoe]

Originally Posted by Jay S

I think a Summit 2802 would be better than a 60916 with 670 heads and a 4” crank. The 60916 would have been a good choice if you had a later open chamber head, 3.75 crank, or less compression with the 4”.

Cliff agreed with this also. Is the a HR similar to this in Howard’s?

[Jay S]

Originally Posted by ponchjoe

Cliff agreed with this also. Is the a HR similar to this in Howard’s?

Yes

[ponchjoe]

Originally Posted by Jay S

Yes

Is it the Saturday night special you posted earlier?

[tom s]

Stump puller.Tom

[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

[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.

[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.

[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?

[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]

Most roller cam profiles have more area at higher lifts where the piston speed is higher. You can run a bigger cam compared to a HFT and still have the similar idle with more power.

[jamaca85]

I ran an old comp 268h cam in my firebird back in the late 80s with 670 heads and 410 gears. it was a daily driver with an old q jet on it ran 13.70s at the track. just don't over think it....

[CROCIE JR]

OP. For a $130 your out! Hahaha. Save up an extra week.