aaronk785
Well-Known Member
Has anyone ran a comp cams solid 306 magnum in a 10 to 1 340 and what was the rest of your combo and how did it run. Specs are 260 at .050 and .555 lift on a 110 lsa.
comp cam 306 solid
- Thread starter aaronk785
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I have not myself. However, with a set of well ported (and balanced flowing) heads, it should be very stout. IMO, run a 1.6 rocker for a .592 lift before lash and such.
Iron or aluminum headed?
I’d try for a smidge more compression.
But head flow over compression.
Iron or aluminum headed?
I’d try for a smidge more compression.
But head flow over compression.
aaronk785
Well-Known Member
Thanks rumble. It not the best cam for my combo but I have it. Current motor is actually 9.8 to 1 with home ported j heads 2.02 1.6s. I was going to shave the heads .040 to get to about 10.25 with .028 gaskets. Changing my combo a lot. 4500 stall 4.10 to 4.30 gears 26 in. drag radials, tunnel ram and 2 340 avs carbs which are on it now and I love this set up. Old set up 3.55s and 2400 stall. Hoping for 11s
Brian Hafliger
Well-Known Member
You need at least 11 to 1 compression with that cam.
I ran the next small cam, the 294S, (.525/110) which has been listed in the “11 second” thread. I never did much beyond braking in the cam.
aaronk785
Well-Known Member
Thanks guys. Sounds like to much cam for my build. Had it on a shelf so thought I might try it. Probably go custom from howards its only an extra 15 bucks. If I have to buy new might as well.
If you have a true 4500 converter, 430 gears and short slicks, that cam would work if advanced a bit. JMO. It certainly isn't optimal.
It won't be good down low, that's for sure. That doesn't really make much difference with a 4500 converter.
It won't be good down low, that's for sure. That doesn't really make much difference with a 4500 converter.
How would the mopar 557 cam compare to this in a similar 340 with w2 heads?
Power wise it is up to how well the heads flow. Otherwise, they are a similar cam. The MP has a steeper ramp for a quicker valve lifting. Less duration, advertised, 306 vs 296 and @.050 by 2* less, with a mear .002 more lift.
Thanks, how lazy would it be on the bottom end in a 4 speed a body with 10 to 1 compression?
557 is a good cam.
That is a loaded question without enough information to give a reasonable answer in the general parking lot of a super speedway NASCAR events parking lot.
A lot of how lazy a cam is more than just AJ running his fingers across the key board endlessly babbling about proper compression ratios, static and dynamic wise, it is also intended useage and the cars weight and how it is spread, gear, tire size, balance, suspension and so on. Materials and parts within the engine and car as well.
If your worried about a lazy bottom end, use a smaller cam. If you want high rpm power with bottom end, you may have to compromise in the build somewhere.
I seldom find a lazy cam. Why? Because the cam is used as intended. I don’t force the cam of these sizes and larger to idle around town and ask them to do 15 to 70 getting on the Hwy. with a out of combination gear ratio (converter for automatic transmission guys) tire size, etc....
Lazy day s also a point of view or feel which is a lot like, “What is streetable?”
What kind of power are you looking to make and in what rpm range are you looking to make it in as well as what rpm are you cruising at?
Marcohotrod
Well-Known Member
I have that cam in my car since 1996 and it runs great. True 11 to 1 340 with 3.48" stroke, ported j heads, 1.75 headers, ld340 intake, 750 avs, 4 speed, 4.56 gear, 28" tires that are 11" wide. Installed at 107* and I can be idling along and floor it and light the tires up. With slicks and 2.5" mufflers and air filter and fan it has gone 11.7 at 116
Nice combo Marco. And in the above reply is the main key to getting that cam working on the street. A good bit of gear.
On a fresh build, fully ported Edelbrock heads, rpm - ag and 1.6 rockers would be awesome.
On a fresh build, fully ported Edelbrock heads, rpm - ag and 1.6 rockers would be awesome.
Would it produce decent power at or above the torque peak?
B3422w5
Well-Known Member
I have a 260/264 cam in a 360 that is about 10.4 to 1 compression. Got the compression up to what it is by milling my mildly ported eddies and running an 028 gasket.Bone stock 360 shortblock..
Have a 4500 flash convertor with 28 tire and 4.10 gear. Using an airgap intake. Car weighs 3300 with me.
My cam is on a 106, and is installed at 102.
I have found this combo to be pretty soft 60 foot wise(1.58 best) but makes big power MPH wise for what it is. 119+.
Soon swapping to a 904 and about 5200 flash convertor. My guess is its going to like the change a lot. Should get it in the 10’s.
In your case having that cam on a wider LSA than mine will hurt the bottom end some, but should help on shift recovery.
I think it will work with good convertor and gear. Definately one or two sizes too big, but convertor and gear can help mask it. Definately wouldnt run a single plane
The more compression the better
Have a 4500 flash convertor with 28 tire and 4.10 gear. Using an airgap intake. Car weighs 3300 with me.
My cam is on a 106, and is installed at 102.
I have found this combo to be pretty soft 60 foot wise(1.58 best) but makes big power MPH wise for what it is. 119+.
Soon swapping to a 904 and about 5200 flash convertor. My guess is its going to like the change a lot. Should get it in the 10’s.
In your case having that cam on a wider LSA than mine will hurt the bottom end some, but should help on shift recovery.
I think it will work with good convertor and gear. Definately one or two sizes too big, but convertor and gear can help mask it. Definately wouldnt run a single plane
The more compression the better
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