hornerhotrods

iTrader: (2)

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.

xpndbl3

iTrader: (23)

i spun my F13 cam to 6800 no problem. Sounds to me like valve float if it stops pulling.

chris-m

i have a very mild cam 220/220 111lsa and a demon 750cfm carb. uprated pushrods and valve springs, makes peak power at 6200rpm but will rev to 6500rpm.

butler

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.

kinglt-1

iTrader: (26)

Comp ThumpR series...

TooLateVTEC

iTrader: (2)

If your running a cam meant for fuel injection in a carbed motor that could be a problem.

LSJM1

iTrader: (15)

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.

Z28/2002

iTrader: (27)

Ive got a MS3 on a 113 in my carb'd TA and it pulls past 7K. And the motor is only a little 346

hornerhotrods

iTrader: (2)

Somebody wouldn't happen to have the specs on a ms3 cam would they?

TooLateVTEC

iTrader: (2)

237/242 - .603"/.609" 112LSA (standard)

butler

That's exactly the cam I am running. afr 225 heads 450rwhp through a 4200 stall turbo 350

TooLateVTEC

iTrader: (2)

^ Thats some good power through a high stalled awfulmatic.

LSJM1

iTrader: (15)

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

butler

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.

5.3LJimmy

iTrader: (10)

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.

LSJM1

iTrader: (15)

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

butler

I love to shift but have found the auto to be more consistent and faster. Besides there is nothing like a decent stall.

xpndbl3

iTrader: (23)

I paid Pat G to spec me a cam for my new combo, seems like it's money well spent to me.

hornerhotrods

iTrader: (2)

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.

xpndbl3

iTrader: (23)

with a 2500 stall any cam will be a pig....you need to loosen that up by 1500 at least to get into a decent cam