the cam i am going to run is 272/282 adv. dur. 442/465 gross lift. Do I need to modify my heads for this lift?? I was going to run some poreted stockers for now, until I can save up for some new heads. Going to be 58cc 305 heads, or I have some 76cc 882 castings

 

i'd recommend the 305 heads.
That's one weenie cam, very weak ramp rates there. Shouldn't need any mods to the heads, maybe new valve springs. Don't expect huge gains there.

 

weenie cam??? in another post everyone siad its too big

 

It has a lot of duration for the lift. Which means it'll probably have a lopy idle but not a lot of power to back it up.

 

I was going to mention that lift is very low for a duration like that...

I would have thought somewhere in the .55+ range.

 

yea, that's what I meant.
like it's an old low tech style of grind or something. maybe stock valve springs would be ok with it, it's so weak. I'd upgrade anyway. and if it were me i'd ditch that cam.

 

A Comp Xtreme Energy 256 will make more power, more torque, and get better fuel mileage than the cam listed above.

 

you cannot compare the duration of a comp cam to this cam. it is measured at a different lift point.

Appears to have a longer duration because of the lift point reference but actually when measured the same as a comp cam is very close..
I ran 13.0 ET's with this cam in my 350. can't be that bad.

Has a good idle, lots of vacuum and broad power range.
and the car was very reasonable on fuel even with 4.10's Worked very well.
Ask for cam advice on this board and you'll get one of 3 cams every time. Ccomps XE256 262 or 268.

Like these are the only cams ever to exist.
The wheel was invented way before Comp Cams ever came along.

The cams like the "old" one mentioned are modern design hydraulic profiles. They make good power and do not require extreme valve spring pressures which increase valve train wear. They are proven performers in the real world.

A comp EX cam just takes the lobe design more to the max.
Pushes the reliability envelope as well. If a simular comp cam actually makes any more power it will be slight at best. Its been proven time again that the most extreme cam lobe design does not alweays make the most power.
There is much more to cam design than the difference between the advertised duration and the 050" duration.
The advertised duration has little to do with the actual "running duration" or actual "seat to seat" duration in a running motor. But strong marketing sells cams.

You'll never see a A-B dyno test between A comp extreme cam and a simular one of the these "generic grinds"
The only comparision you'll see is a comp cam against the old GM "151" 327-350hp cam. Which was designed for a specific hi perf 327ci motor using Corvette exhaust manifolds and 11:1 compression back in 1965.
It's a dumb comparision.

The 214-224-.442-.465 112 LSA generic grind sold by Summit, Blue Racer etc etc works very well in a mild moderate street motor. Can any one show me a time slip using a XE256 cam in any motor? Anything even close to a 13.0 et.

Great value for the $$$.

Just a note: I do have a larger XE series cam in my car. Yet untested.
Would love to compare it to a simular generic grind of the same size to see how it stands up.

 

shoot, that's the same cam i ran 13.0's with in my 305!

 

alright my curiosity is piqued, what cam is it???

a hydraulic flat tappet should be measured at the same lift as any others (and comparable to a comp xe wouldn't it?)

if this is the same cam as mwnova had... it's a blue racer by crane?

post the full specs already, but with that high of a duration, and lowish lifts, it seems wimpy, but the duration at .050 tells more.

 

Where a company begins to measure 'advertised' duration varies from company to company. One may use .002" while another may use .008". Comparing advertised to advertised, between 2 seperate cam companies is almost pointless. Hence, .050" duration.

 

Seems wimpy cause you don;t know much about cams.. Sorry if that seems harsh.

the .050" duration tells you one thing. The .050" duration.

Does not describe the lobe shape any further.

The .050" duration is a good way to compare 1 cam to a different sized cam as to it's basic operating RPM range.
That is all it will tell you. Won;t tell you low much lift, how much torque, when the cam kicks in etc.

There are many many factors that determine the actual "running duration" and off seat lift curve of a cam profile that cannot be stated simply by a advertised duration figure. (hyd lifter bleed rate and ramp design interaction is very complicated and not simple to perdict. Tempeture and clearances has a lot to do with it.

The cam I'm refering to is the BLUE RACER #WG1159

You'll see the same cam sold by many generic brands like Summit and Federal Mogul. its even in the Crower catalog.
You may even see it with different advertised durations.
( marketing).
it's a nice grind that WORKS.
if it can make 2 very simular cars (one with a 305 no less) run consistant 13.0 ets. and be easy on the valvetrain it cannot be that bad or Lazy.

Some things just don't need to be reinvented.

 

this is a cheapy cam, summit 1103. Doing a rebuild, mild performance but on a budget. Then, this summer when I have some $$$$ I'm going to dump it into a well built 383.

the specs on the cam are.
442. 465 lift at zero lash

272/282 adv duration


Cam timing at .05

IVO O* BTDC IVC 34* ABDC MAx lift 107* ATDC 214* Dur
EVO 49* BBDC EVC -5* BTDC Max Lift 117* BTDC 224* DUR

This cam is going in a stock bore 350 with some h345NP flattops 9.6:1 at 64cc, with some 58cc 305 heads 1.84/1.5 with some porting should be 10.2 :1 or so. Street Dominater intake with a 750 holley

Im hoping for 300-320 horses and torque, but will take what iot gives m. Just want more than my stock 305 but nothing crazy YET


I will prolly do some 1.5 roller rockers as well. Just need to know If my heads will work without lots of work.

 

yep, that's the same grind as the blue racer cam. same stuff, different name.

just so you know, i ran some stock replacement springs in my stock 416 305 ho heads and had no issues whatsoever with spring bind or valve float.

 

416's are the same heads i am going to use

 

yea, I was hoping to get the .050" duration for an accurate comparison, as I do know that advertised duration isn't an easy comparison, as the ramp rates are not figured in.
I guess this has good "area under the curve"?
Still seems like a "small" cam, 214/224, .45" lift.. sounds more like a 260ish advertised to me.

There is a lot for me to learn about cams yet, but that still seems like a "small" cam, compared to a compxe274 or something like that. The powerband for this cam is probably rated around 1500-5000 or so? street dominator and holley 750 with that cam doesn't quite sound right.

anyway, it's what, $79 from summit with lifters right? hard to beat that.

 

I do know that I have run the 214/224 as well as the 204/214 in my G20s 350 with 305 HO heads on it. The first was a the 214/224 followed by the Mellings MTC1 204/214. It was a decent cam, not great. It was way too soggy of a cam comared to even the GM roller LT1 cam. My 305 TBI with a L82 cam made more torque over a broader band than that 350 did. I like several comp grinds, several crane roller grinds, and a select few GM cams.

The L82 cam with 1.6:1 rockers put a 305 TBI powered G-series Van into the mid 15s @ 88 MPH. That is good IMO.

I have seen that same summit cam put into a truck engine with lots of tuning. It lost torque and gained practically no HP even after tuning.

 

what would be a better intake/carb combo for it??

 

Unless I just missed it, what is it going into.

I like the Edelbrock Performer RPM and a PROPERLY tuned Q-Jet. This combo delivers great off-idle torque, lots of HP, and great fuel mileage. It will make more mid-range torque and HP than a standard Performer and raise the Peak HP RPM up about 500 RPM. Gas mileage will be about the same as a stock intake or a performer.

 

its for my 85 T/A

 

I was going to say an edelbrock performer RPM, or maybe a weiand stealth.
something around 600CFM should be ok for that, it's kinda a mild perf rebuild right?

 

Sorry, not trying to high jack a thread, but, how do you think this cam would perform in a mild vortec TPI motor? Idle quality, gas mileage, performance?

 

mild performance/ budget reliabilty

 

with a 4.10 gear, holley 650 double pumper, holley street dominator intake, a built 700r4 with ATI 10" 2400stall converter in my 3270lbs camaro, i went 13.03 with that cam in my 305 and got roughly 22mpg on the highway with great streetability and wonderful idle charactersitcs.

sonix, this cam is NOTHING in comparison to the xe274, which i'll be running in my 10:1 113casting headed 360.

 

I had the XE-274 in the 305 (ported 601s, Performer RPM intake, Q-Jet, Cast Manifolds) as well before switching to TBI. When the tach hit 2,500 RPM HANG on!!!! I was shifting at 6,300 RPM! With a 3.08 gear and a 700r4 shifting at 6,300 rpm it was fun. Not much around town could touch it from a 20-60 roll.

In case some of you have noticed I have built alot of combo's. The two piece timing cover greatly simplifys things. Taking apart the front of a Van for a cam swap is a PITA though.

 

yeah, i can't wait to get mine done and installed and in the frickin' car! i'm totally psyched! with lots of tuning and track time, i hope to get it down into the 11.9 range. i also took an additional 45lbs. off the front of the car when i went to the aluminum heads so i should be in the 3230lbs. range with me in the car!

 

holy cow nova! Then again, you'd done some crazy things with a 305, why not extrapolate that to a 350 eh?

yea, that cam is a good cam for big4x4's needs, cheap, good power, reliable on valve train. But it isn't squeezing the last bit of power out of the engine, which is kinda what most people are going for when building a power house engine. Probably why comp cams xe series are so highly recommended....
I'm doing the lunati voodoo myself, apparently taking the extremes of the comp xe up another notch. it's rated as a 268 cam, but it's closer to the 274xe...

 

if i do decide to go auto on this, what stall shoudl i need ??

 

i went out and spent alot of money on an ati 10" 2500 stall converter. it worked out REALLY well for me. the way i see it, the converter is not a place to skimp out on. alot of people are running b&m and stuff like that, but i've seen too many of them tear up. i'd look into an ATI or a BTE or a Yank. all of those places build the converter around your needs as opposed to just buying a converter with a set stall. mine may have only stalled to 2500, but it would flash to 4000 imediately after i dropped the hammer and let off the brake.

 

do i really need a stall on this cam ro will a stock converter work?? be a th350 tranny

 

techincally, a stock converter will work and move the car around. a stall in the 3000rpm range would probably be OPTIMAL though. i ran mine with a 2400stall ATI converter, but my converter is kinda unique in that it would flash to 4k as soon as i dropped the hammer.

 

this cam is just fine with a stock converter.