Cams for carbs
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Teching In
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From: salisbury, maryland
Cams for carbs I'm building a carbed lq4 with a victor jr and 1 7/8 long tubes. I have the stock 317 heads with ls6 springs. I'm not sure what cam to run in a carbed setup. Every cam recommendation I get seems to fall on it's face on the top end about 5500 or so. I noticed alot of the cams don't have much or any valve overlap. Maybe that's why it doesn't make hp at high rpms?
I was wondering what other people were running or what works with the carbed setup.
I was wondering what other people were running or what works with the carbed setup. 
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I am running an ms3 cam 111 lsa engine makes 450 rwhp@6700 rpms with afr 225 heads 750 holley vic jr intake but only 375 torque. Looked on EPS' sight and they say a cam spec'ed out for a stock style efi intake dies on torque on a single plain intake. They have a cam specific for this application.
The comp thumper 291 does look somewhat similer to the EPS single plane cam I would like to find a good cam for my LQ9 with a single plane GM intake so far I know they like a tighter LC like 109-110.
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Verdad Gallardo I'm sure the MS3 and the like will pull to allmost 7000 on a carb motor but it's the lack of torque with the short runner intake a narrow LC brings in the torque earlier look at the asa cam on a 110 gobs of torque early in the band I know it's a little small for a 6.0
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6700 rpm peak power on a 111 lsa. Put it on the dyno and with a manual valve body in third it jumped straight up to 5200. May advance it a bit to bring the torque in quicker. Plenty of clearance.
You're going to need something with some overlap to get that thing to pull higher. It sounds like you've had a few very small cams spec'ed out. As mentioned above you will also want a tight LSA for that carb setup. 242/248 on a 108 LSA will rip to 7000 RPM's like nobody's business.
I think I'm going with the EPS single plane cam .615 .615 236-248 108 LSA. Changing trans to a turbo 400 with a 10" 4000 stall but keeping the 3.42 gear for now.3200 lbs I would love to run anywhere in the 10s NA
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Thread Starter
Teching In
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Joined: Apr 2009
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From: salisbury, maryland
well currently its main purpose is to get the truck running and put put around not doing anything radical at this point. i still have to afford cal-tracs, rears, and a cage before i go to stepping on the power a whole lot. It has a glide with a small 2500 stall converter and 4.10 lincoln locked rear. nothing special at this point i just dont want to buy a cam and it turn out to be a total pig.