Q for HOTROD????

F

fordfreak95

Active member
Hi ROD! Is the comp cam you are running smog legal? I talked to you on SVTPerformance.com and I looked up the spec cards on the Crane "L" 2030 cam and the comp 35-255-5 cam. The comp looks stronger. But the open and close settings have me a little confused. You had the L cam in your truck for a while didn't you? What is the better "street" cam? If I remember right when I was reading your "cam swap" posts you said that the truck felt stronger down low but didn't pull as hard up top?! I just want to make DAMN sure that the Crane piece is the right one for me. Maybe a call to Cam motion will be my best bet. I just need it to be smog legal here in R.I. And speed density friendly. Thanks for reading!!!!!!!:D
 
I'm not Rod but will give you my .02 if you want.
I personally think the Compcams will be stronger all the way across the board.
If you notice the comp unit has less seat duration than the crane but it has slightly longer intake duration 210 vs 206 and has the same exhaust duration figures at .050. This will build more dynamic compression in the motor and give better low speed torque. The comp unit has slightly more lift as well and both cams are ground on 114 degrees Lobe separation angles. I believe the two cams have 4 degrees advance built into them and are installed straightup at 110 degrees.
There is a trade off though, the comp unit will be a little noisier on the valve train because of the quicker opening rates, but it will not be objectional. BTW the comp unit is not emission legal just speed density friendly, but I don't think you will have any problems passing the sniffer. All told, I bet there isnt 10hp in the difference...
Later
Steve
 
HotRod is in the hoooooooouse!

Hey all. I didnt have the Crane cam in my truck, StruckBy has it in his 351. Ive ridden/driven it several times and to me, the CompCam unit feels stronger. It has a great low/midrange with good horsepower up to 5300rpm. I havent shifted any higher yet, so I dont know about 5500. As for the top end, I am runnung 100+ on every pass and a best of 101.55. Thats pretty good top end. For a street driven/daily driver, I recommend the CompCam.
We keep coming back to the point of timeslips. I dont know of any Lightning with a Crane/L cam running low 13s on the motor. Not saying they cant, but they dont. Hope this helps.
 
Ok, maybe this is the place to ask this. I've bought pretty much all the stuff I need to convert to a roller cam(lifters,spider,link bars) for basically 50 bucks. I'm wondering what's the biggest I could go with as far as lift in a SD friendly cam. I plan on possably doing TFS heads this summer(ported of course :D) and just want alittle idea of what I can do as far as a cam. I plan on getting a custom grind of course, probably a Cam Motion, or possably talk to Ed Curtis. I'll be tuning with the Tuner hopefully by then! :)

Any guestimates on how radical I could run?
 
Thanks for all the info. & replies sstock, struck & Rod!!:D But the comp unit not being smog legal is what is holding me back from selling the L cam and getting the comp. Although they are not all that much different. It is just that here in RI the emmisions testing is real tuff!! And it just got tuffer! They cut the allowable fumes or whatever by HALF!!! Oh well! My L is getting a new sticker next week though(heads/cam are not in yet). Then I will have 2 years to get the tune smog friendly!!! Hmmmmm! And what do you mean by "noisier on the valvetrain"???:confused:
Thanks!!!!!
 
I have a Comp roller cam and here is the spec card. It idles smooth and speed density friendly.

28450161HqlDCrciaD_ph.jpg
 
RW, for some reason, this board is not accepting pics stored at webshots and , I think , other places. Would really like to see your cam card though.
fordfreak95, Cams with quick opening profiles like the compcams high energy,magnum,extreme ect. generally speaking tend to keep overall duration short but at the same time keep the same duration at .050 that the competition is making. Sometimes the overall duration of the cam is some 20 degrees shorter. Then the ramp on the cam is ground to open the valve as quickly as possible without edge-riding the lifter into the cam lobe(flat tappet only) then when the valve closes it will have a steep ramp as well but in a little different profile as not to slam the valve shut. Anyway the theory is there is not much usable flow at lifts below .05 and it does tend to, because of reduced overlap in this lift range, to build more cylinder pressure than a cam say with the same specs but with the longer seat duration timing(.006-.050).
This will give it more torque down in the lower revs,IMHO.
Anyway, the rate that the lifter opens the valve is what gives you the little additional upper end noise.
Later
Steve
 
Hey sstock, it is showing up on my computer. It didn't at first, even with a refresh, but when I go out and come back in it is there. If anybody can't see it but wants the .jpg of it just e-mail me and I will send it.
 
OK! You know what it is? I have never heard this "valve train noise" you guys are talking about. I can understand WHAT it is. Does it sound like a bad lifter on a cold morning? Will the Crane L cam be a better "long term" cam because it does not create these harmonics? I love the idea of more low end torque!:D If all I have to pay for that is a tad bit noisier engine then that's OK with me!!:D Again, THANKS!!!!!!!!
 
Geez Louis, I'm getting so much darn deja vu it ain't even funny...Seems I've asked all these questions like twice! I don't even remember posting half the stuff I'm seeing....I swear I wasn't drink'n!!!
 
Re: HotRod is in the hoooooooouse!

HotRod said:
I dont know of any Lightning with a Crane/L cam running low 13s on the motor. Not saying they cant, but they dont. Hope this helps.
Click to expand...

There's no one else with the CC cam doing it either! Matter of fact, there's no one in the country that I know of who's running as fast as you do on a stock short block and no power adder. I'd bet that the next guy down the line who put the same exact combo you have on his truck wouldn't come anywhere near your numbers. Your truck is a freak. ;)

I agree with Steve, I'd bet that on similar combos there isn't 10 hp difference between the two cams. But I also agree that the CC cam will be stronger than the Crane cam.
 
Re: Re: HotRod is in the hoooooooouse!

FMOS Racing said:
I'd bet that the next guy down the line who put the same exact combo you have on his truck wouldn't come anywhere near your numbers. Your truck is a freak...
Click to expand...

id like to second that motion! i mentioned the exact same thing awhile back on the old board. for some reason, you have gotten your hands on the exception, not the rule...hell, StruckBy ran a 12.7 his first set of runs with that big old 410(?) stroker in there. you, Mr. HotRod are about to run a 12.9 (maybe more) without the aid of the additional 50-something cubic inches. it was definatley not a monday or friday when that truck was put together on the assembly line :)
 
Last edited:
Hel!, maybe Ill call Ripleys believe it or not!!!
I just got my JDM Ranchos and my new tire combo for the track. 215/75/15 Bias-ply front runners and Hoosier Quick Time Pro 29/14.50/15 for major HOOK! These tires save and extra 50# over the radials. That might be a tenth right there. :D
 
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