Ok everyone I need a little input on the matter of a cam selection. Im rebuilding my 455 once again. For the past ten years Ive been using the lunati sp2 cam. Ok I guess, car ran 13.5 at track with 2:73 open rear. Engine pulls but not as hard as with some of the other cams that Ive used. I originally started off with the posten gs118 cam. Then I switched to the posten gs 113 cam, My favorite so far, pulled harder and harder till my 5500 shift point. Used to rip tires loose as car approached about 35mph, easily. Im thinking about going back to the posten gs 113 again. The rest of the motor consists of stage one heads with stainless swirl polished valves, forged 10 to 1 pistons, edlebrock performer intake, holley 750 carb, crane hi intensity lifters and hei ignition with msd 7al. tranny has a 2800 stall. I am switching over to the TA aluminum stage 1 heads. I never ran the car at track with the gs 113 but from memory that cam pulled harder then my sp2. Now posten has the gs 113a cam. Basically I want to know how the 2 will compare, has anyone used the regular 113 then swapped to the 113a and if so describe the difference if it was noticeable, power, idle, etc. Thanks. Allen Allioop108@aol.com
Go with the TA290-08H or HL, it was designed for the heads your buying and I ran it in a set of ported stage 1's and it killed my GS113 and GS113a. If your heart is set on a Poston cam I would say the GS107-118A, It's probly the best of there cams to use with the new heads. Hope this helps
ok, so i forgot to mention that i'm not building a race car, just a quick every day car. Since it will be driven daily, roughly 20 or so miles to work and back, plus used for out of state trips, I can't get too radical with this cam. My lunati sp2 cam is roughly .501 lift slightly more then the poston gs 113. With the sp2 I can get close to 20 miles to the gallon on long highway trips, 13 gallons to travel 210 miles. If I go with any one of those bigger cams, yes i'll get more power, but long trips will not be practical. My around town milage sucks as it is. So any input on preferences between the gs 113, gs 113a, lunati sp2 or something along that line. I want a quick but practical street car. Would like to beat my tire smokin 13.5 while still keeping the other factors the same, 2:73 gears (hopefully with a posi soon). Only changes will be different cam and aluminum heads in a freshened up motor.
will the 113a cam pull harder then the regular 113, pull the same but at a different rpm range, same or rougher idle as 113?
Comp Cams has a Extreme Energy cam out that works well according to Hot Rod engine test, beat all other big blocks in power with similar parts. The ext. energy cams are the latest ramp technolgy, the kind of stuff Buick owners seem to get last.
..... I'm bound to silence... But be careful what you recommend, unless you were standing in the dyno cell during that test.. all I can say.. don't ask.. read between the lines.. JW
Hehehee.... let'r rip Jim... :beer Better yet, take one of the umpteen threads on fast ramp cams(aka: Extreme Energy, etc., etc.) and make it a "STICKY".
Um... no Gary.. I'm pretty much done talking about cams.. in this lifetime.. I will just talk about what I use, and you guys can figure that: A. I do this for a living. B. There is a reason behind the use of every part in a motor. C. I don't accept excuses from manufacturers, and I don't build anything that I don't consider the finished product as good as it can be. So if there is an advantage in a particular product, then odds are it's in one of my motors. JW
i im running the 113a, it is streetable, but you need a stall converter, i run s/p trans, power breaks good, idles at 900 good, great throttle responce, i have ran it up to 6000 lots and pulls hard, i have adjustable push rods, hi rev lifters, stage 1 springs. i beleive postons is honest, in there cam ads, i just did what they recomended,
ok, thats what i needed to hear. a few questions. I have a 2500-2800 converter, is that about what you are using. I know I only have 2:73 gears but with the converter i do get back some bottom end, will gear up the transmission later on. Also at what rpm do you start to feel the pull and i'm assuming its continuous until you redline. Also what gears are you running, how about your piston to valve clearence, i'm running 10 to 1 forged pistons, ndont remember the brand but I dont think they have valve reliefs. thanks to you and everyone who has enlightened me
IT HAS EVEN POWER THREWOUT POWER BAND, I HAVE HYPERUTECTICS, AND BLOCK IS SHAVED, 11 TO 1 COMPRESSION, 373 GEARS,3000 STALL, MY LOWER END IS BALANCED AND BLUEPRINTED, POLISHED RODS CROSSDRILLED CRANK, AND RUN HIGH VOLUM PUMP WITH STOCK SPRING, IT RUN THE BEST OF 12.4 WITH .2 REATION AND 1.85 60 FOOT THATS WITH STREET SLICKS, THREW THE PIPES. MY MECHINEST RECOMENDED HYPERUTECICS, THE NEWER ONES ARE BETTER THEN THE OLD ONES, I WANTED TO GO FORGED BUT HIM AND POSTONS SAID RUN GOOD FUEL AND NOT TO MUCH NITROUS, I JUST HOPE I WASNT TO TRUSTING. SO FAR SO GOOD, ALSO HAVE RUN IT UP TO 6500 WONT DO THAT AGINE, I SHIFT AT 5800.
Jim I have to say that I am dissapointed with your decision to not speak about cams anymore. I feel that you are probably one of the, if not the most respected engine builder on this board. When you have something to say I pay close attention to it. I will soon be building a 455 for my car and I soak up as much information as I possibly can. No offense meant to anyone on this board but I am more inclined to take the advice given from someone whos built hundreds of motors and tested thousands of combinations over the guy whos built maybe five or six motors. Again, no offense meant but you shouldn't be afraid to share your opinions on this board just because someone may get upset. I've never actually sat down and talked to you face to face but I get the feeling from other people that have that you are a stand up guy that is always ready to lend a hand or help out with an opinion. People might get upset from time to time, I don't think that will ever change. Anyway thanks for all of your input on this board.
Todd, Feel free to email me with your combo and specifics, and I certainly will recommend a cam for you. I have done that hundreds of times, and can only recall one incident at this time, where a guy was not happy with the cam I recommended. It was a bigger grind that I don't have any problems getting to behave on the street, but as with everything else in life, there are tons of variables in an engine build, which can cause the bigger cams to be a problem at times. The thing is... cams are so simple, yet are made so complicated, after all the hype and advertising folks get done with us.. And I have just been in too many fracuses caused by opinion, to want to publically comment on particular grinds anymore. My website has the complete buildups, dyno tested, for the grinds we use here, as well as some good testing done on a bunch of cams that Scotty did a couple years ago. That's valuable info, that cam be used as a starting point for your buildup, and then fine tuned before you actually pick the exact grind. JW
You mean "fracas." I was in court one day and a lady who had been seriously cut in an incident with a knife was testifying. The DA asked her " Well Ms Smith were you cut in the fracus?" To which Ms Smith pointing first to the area just below her breast responded " Lord she cut me from here all the way down to here ---just above my fracas" And with that in mind I quickly existed the room thinking how fortunate it was that her fracus had been left in tact.
The plural did not fit my into but nevertheless a true story. My best are too hot for the Board but hope to see you at the Flint 100th. I HAD TO GO --MAKING THE 200TH IS GOING TO BE TOUGH!
