Comp Thumpr cam
03-12-2013, 10:05 AM
#22
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I was watching Horsepower TV this past weekend they were working on a SBC that had a thumper cam in it. They removed that cam, ported the heads and intake and put in another cam that was supposed to be better but ended up lower peak horsepower but overall gains in the lower end, if I was listening correctly.
I have a coupon for a free thumper cam but am unsure about using one.
I have a coupon for a free thumper cam but am unsure about using one.
03-12-2013, 09:55 PM
#27
My comment was just poking a little fun at the shine an cruise' old timers I've meet (all nice cool guys that I enjoy hanging with too FWIW).
So this cam has it's place and I almost would say it sounds exactly like what he would want from his cam.
Longevity to his springs, noticeable lope, decent power.
03-13-2013, 04:34 AM
#28
TECH Apprentice
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I watched my Dad with his last car, 509 BBC, huge cam. Always playing with valve lash, changing springs cuz they are whipped, price to pay to run high 9's. Even he had calmed his current nova down, nice cruiser, only 468 cu, runs on 87 octane, still manages 11.30's. But it is fun, without the constant maintenace. It even sounds good.
03-13-2013, 05:44 AM
#29
If you decide to use a thumper on the 5.3, use the smallest 1 and be sure to use at least 3000 stahl converter even though comp cams says stock converter is ok. The middle thumper is really too big for a 5.3.
For all the haters, the smallest LS thumper is very close to a GM Hot cam, which runs incredibly well in any LS motor.
For all the haters, the smallest LS thumper is very close to a GM Hot cam, which runs incredibly well in any LS motor.
03-13-2013, 06:55 AM
#30
It should also be said that a lot of the hate on Tech for the Thumpr series comes from the EFI guys. The narrow LSA and advanced ICL of the Thumpr series cams compliments the open plenum single plane intakes that most carbureted LS motors use. It is not so good for the long runner EFI intakes that most of the guys on Tech use.
03-13-2013, 05:57 PM
#38
I get it you want to sell cams, I'm not stopping you, and I dont have a problem with you either. Since you are the cam guy of the day , that people here are looking to, maybe it is you who should explain it, and why your custom cam would be better than a thumper for the original poster's needs.
Lets not let Internet BS start to invade the carb forum, it has been reasonably BS free up to now.
There is so much nut hugging and false Internet truth being spread on the rest of LS1 tech that I couldn't help myself but post some actual 1rst hand experience on this.
Barrett
03-13-2013, 06:49 PM
#39
Don't take it so personal, especially when you ask for it with condescending responses like the 1 below.
Gentle lobes.
I get it you want to sell cams, I'm not stopping you, and I dont have a problem with you either. Since you are the cam guy of the day , that people here are looking to, maybe it is you who should explain it, and why your custom cam would be better than a thumper for the original poster's needs.
Lets not let Internet BS start to invade the carb forum, it has been reasonably BS free up to now.
There is so much nut hugging and false Internet truth being spread on the rest of LS1 tech that I couldn't help myself but post some actual 1rst hand experience on this.
Barrett
Gentle lobes.
I get it you want to sell cams, I'm not stopping you, and I dont have a problem with you either. Since you are the cam guy of the day , that people here are looking to, maybe it is you who should explain it, and why your custom cam would be better than a thumper for the original poster's needs.
Lets not let Internet BS start to invade the carb forum, it has been reasonably BS free up to now.
There is so much nut hugging and false Internet truth being spread on the rest of LS1 tech that I couldn't help myself but post some actual 1rst hand experience on this.
Barrett
Gentle lobes doesn't even scratch the surface of why. A faster more aggressive lobe is quicker from seat to seat aka .006"-.006". Therefore it spends less time in crank degree in overlap than a slower lobe. A slower lobe is the opposite, it spends more time in crank degrees in overlap because it takes longer to go from seat to seat as it is a slower lobe.
Now that is cleared up I will address the rest of your post.
Where have I said one time in this thread that a custom cam let alone any cam I offer would be better? I haven't once. The only reason I'm in this thread is because my keyword alert told me someone mentioned tick in this thread. I hardly ever come in this forum.
What internet BS have you ever heard or seen me post? You say you have no problem with me yet you act like I'm spreading lies and BS for cam sales. I don't contact people to do their cams they contract me based off results and others recommendations. If that makes you mad at me you're mad at the wrong person.
03-13-2013, 07:03 PM
#40
I'm sorry for de railing this thread. I apologize to anyone I may of offended with my condescending post including Barrett (3pedals). I realize now Barrett wasn't saying I was spreading BS, but that there was BS involving people saying these cams suck. Anyways enough with the de rail.