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Post by redmarine on Dec 12, 2013 0:47:09 GMT -5
No such cam as a comp cams 268h? No, I was responding to the comment about wanting all bottom and all top. Lift doesn't mean much. Lift should be decided by the potential of the heads. Duration should determine where you want the power. More lift seldomly means more power. Duration moves your band up and down the rpm range and what it's cut on determines how much you want to "squish" it into that range. Cams cut on a 108 or a 106 will make a peaky number to impress the dyno squirrels but may lose the drag race. Cams cut on a 112 or 114 will be more broad and driveability higher but you'll for sure loose the dyno competetion. Use cams to locate where you want power, use heads, timing, compression and other small items to make power. Stock heads fall off at 420 440 lift so no real gain there. Now how many degrees does it take to get max lift? That's where you can make some power with cams. Lobe intensity. Look it up. Crower hit on that one in the mid 90s pretty hard. I run summit 1104 cams in all my motors. Cam card isn't always all the information you need. That's just what they give you. Cam doctors tell you all you need. Sent from my SPH-L720 using proboards i have the 1104 cam from summit in my 350 with , double humps and flat tops. trying to move a roundback w/ 4:86's, would you run a stock convertor or higher stall in a th400? if so what rpm stall?
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Dec 12, 2013 11:09:55 GMT -5
Post by derby217 on Dec 12, 2013 11:09:55 GMT -5
BOOM Joker Nailed it^^^^ Call a cam company up too, tell them what you are doing, what you have and what you want... they have tech lines for a reason...
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cams
Dec 12, 2013 13:53:41 GMT -5
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Post by redmarine on Dec 12, 2013 13:53:41 GMT -5
yes i understand the concept of a tech line... but i want answers from someone with real experience not from someone reading the answers off an index card...
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Dec 12, 2013 14:03:36 GMT -5
Post by redneckracing12 on Dec 12, 2013 14:03:36 GMT -5
yes i understand the concept of a tech line... but i want answers from someone with real experience not from someone reading the answers off an index card... call comp cams, they have a good tech line with people who actually knows whats going on.
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Dec 12, 2013 19:00:16 GMT -5
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Post by redmarine on Dec 12, 2013 19:00:16 GMT -5
sounds good, thanks
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joker14
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Post by joker14 on Dec 14, 2013 16:15:50 GMT -5
I refrain from calling parts mfgrs about their parts. Seldom do they know anything about them. They all have the parts that make the most power. Try an engine builder that does not have a stake in any cam interests.
Sent from my SPH-L720 using proboards
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joker14
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Post by joker14 on Dec 14, 2013 16:17:13 GMT -5
No, I was responding to the comment about wanting all bottom and all top. Lift doesn't mean much. Lift should be decided by the potential of the heads. Duration should determine where you want the power. More lift seldomly means more power. Duration moves your band up and down the rpm range and what it's cut on determines how much you want to "squish" it into that range. Cams cut on a 108 or a 106 will make a peaky number to impress the dyno squirrels but may lose the drag race. Cams cut on a 112 or 114 will be more broad and driveability higher but you'll for sure loose the dyno competetion. Use cams to locate where you want power, use heads, timing, compression and other small items to make power. Stock heads fall off at 420 440 lift so no real gain there. Now how many degrees does it take to get max lift? That's where you can make some power with cams. Lobe intensity. Look it up. Crower hit on that one in the mid 90s pretty hard. I run summit 1104 cams in all my motors. Cam card isn't always all the information you need. That's just what they give you. Cam doctors tell you all you need. Sent from my SPH-L720 using proboards i have the 1104 cam from summit in my 350 with , double humps and flat tops. trying to move a roundback w/ 4:86's, would you run a stock convertor or higher stall in a th400? if so what rpm stall? Why you run a stall in any derby motor? Sent from my SPH-L720 using proboards
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Dec 14, 2013 20:01:12 GMT -5
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Post by redmarine on Dec 14, 2013 20:01:12 GMT -5
would it not be less effort for the motor to get into the power band, or is my concept bass akwards?
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Dec 15, 2013 20:41:35 GMT -5
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Post by redmarine on Dec 15, 2013 20:41:35 GMT -5
quote author=" joker14" source="/post/448340/thread" timestamp="1387055750"]I refrain from calling parts mfgrs about their parts. Seldom do they know anything about them. They all have the parts that make the most power. Try an engine builder that does not have a stake in any cam interests. Sent from my SPH-L720 using proboards[/quote] is the above idea somewhat correct or am i way off?
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joker14
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Dec 16, 2013 9:48:55 GMT -5
Post by joker14 on Dec 16, 2013 9:48:55 GMT -5
If you know where your "power band" is i would say yes, so you should be running a 3800 converter if this is your "Concept" But I see no advantages to doing that. you have a gas pedal,that accelerates the car, no need to idling right at your power band. there are steep prices to pay to have a converter like that. the only situation i think you need a converter is if you were not allowed to put a gear in the car and you have to run a junkyard 350. Then i "May" consider it. Just enough to pull it off idle. But im sure there are tons of guys doing it that win so everyone else must now do it if you want to win. Isn't that how it goes? Someone said to me once "joker if you put a dog turd on top of your car and won with it everyone would show up with a dog turn on their car". Here's my question for you, what problems do YOU have? Lets work on those things. Are you not getting enough launch when you need to?
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Dec 16, 2013 18:49:22 GMT -5
Post by redmarine on Dec 16, 2013 18:49:22 GMT -5
If you know where your "power band" is i would say yes, so you should be running a 3800 converter if this is your "Concept" But I see no advantages to doing that. you have a gas pedal,that accelerates the car, no need to idling right at your power band. there are steep prices to pay to have a converter like that. the only situation i think you need a converter is if you were not allowed to put a gear in the car and you have to run a junkyard 350. Then i "May" consider it. Just enough to pull it off idle. But im sure there are tons of guys doing it that win so everyone else must now do it if you want to win. Isn't that how it goes? Someone said to me once "joker if you put a dog turd on top of your car and won with it everyone would show up with a dog turn on their car". Here's my question for you, what problems do YOU have? Lets work on those things. Are you not getting enough launch when you need to? mostly issues last year with my vics and metric gms that i was running the same motor in, both had my 9" with 4:11. stock HEI and rebuilt quadrajet 4bbl with factory aluminum intake. The problems came with pulling the motor into the meat of the power when it got hot, and im not talking a half of run time hot, seems to happen relatively quickly, 5 min after radiator loss, 10-15 min total, i am under the impression that it had to do with the poor quality intake/carb and ignition, but am unsure... I was more thinking a stall may simplify tuning since i would be targeting a smaller rpm range for the most part. I thought it may also assist the motor in getting into, and staying in the powerband when it is hot as it wouldnt have to struggle through the rpm range that it isnt really designed to thrive in. This year i have a 4412 I am going to run on a factory 2bbl intake. what would be a good choice of ignition or ignition upgrade?? also do you think the 4:86's will be enough in the roundy, or will it be equivalent to the 4:11's in the metrics due to wieght ratio? will any of my upgrades address the issues i had last year? any input on the topic would be greatly appreciated
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Dec 16, 2013 18:52:28 GMT -5
Post by redmarine on Dec 16, 2013 18:52:28 GMT -5
also, the idea came from time spent at the drag strip, dont really know of anyone running one around here. but after thinking about it i thought they may also have their place in the derby arena, but also can see where they would put increased wear on the tranny because of the increased heat often caused by a stall
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cams
Dec 19, 2013 8:26:42 GMT -5
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Post by ashbaugh585 on Dec 19, 2013 8:26:42 GMT -5
Would a summit 1104 be good in a stock 350 with a 375 tranny with 5:14 gears would that cam work
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cams
Dec 19, 2013 20:48:32 GMT -5
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Post by redmarine on Dec 19, 2013 20:48:32 GMT -5
If you know where your "power band" is i would say yes, so you should be running a 3800 converter if this is your "Concept" But I see no advantages to doing that. you have a gas pedal,that accelerates the car, no need to idling right at your power band. there are steep prices to pay to have a converter like that. the only situation i think you need a converter is if you were not allowed to put a gear in the car and you have to run a junkyard 350. Then i "May" consider it. Just enough to pull it off idle. But im sure there are tons of guys doing it that win so everyone else must now do it if you want to win. Isn't that how it goes? Someone said to me once "joker if you put a dog turd on top of your car and won with it everyone would show up with a dog turn on their car". Here's my question for you, what problems do YOU have? Lets work on those things. Are you not getting enough launch when you need to? got anything that might help me?
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joker14
Feature Winner
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Post by joker14 on Dec 19, 2013 20:58:01 GMT -5
Yes sorry. I did not see your post. Pm me
Sent from my SPH-L720 using proboards
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