Engine Backfire Diagnosis Led to Wiped cam Lobes

[350runner]

Sweet!

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[Skweegle89]

85swb "Fancy"

Any recommendations on cam/lifters? Should I just go full roller at this point?


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[350runner]

Honestly smaller cam and a dual plane intake

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[Skweegle89]

85swb "Fancy"

Does anybody make an aftermarket duel plane spread bore so I don't have to use that damn adapter?


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[Skweegle89]

85swb "Fancy"

****, my intake is duel plane.


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[350runner]

Summit, Edelbrock lots to choose from out there.

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[Skweegle89]

85swb "Fancy"

Summit, Edelbrock lots to choose from out there.

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My current intake is a duel plane. So I guess I'm good there. How about a cam? Need mucho torque, less lope.


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[350runner]

If get a different intake if funds allow. This will eliminate the problems you have and can run into with the adaptors.

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[350runner]

For the diy guy at home I'd stick with something from comp cams. Because you can just sick the cam in with the doors on the t chain lined up and not have to worry about the need to degree the cam.

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I run the comp 260h. It idles good and provides pent of vacuum. Stump puller. Tire roaster...

 

[Skweegle89]

85swb "Fancy"

For the diy guy at home I'd stick with something from comp cams. Because you can just sick the cam in with the doors on the t chain lined up and not have to worry about the need to degree the cam.

Sent from the dust in front of you!
I run the comp 260h. It idles good and provides pent of vacuum. Stump puller. Tire roaster...

I assume I will need the lifters as well? Idk that I can swing the intake just yet but I will see what I can do. Depends on what everything else costs. Going to replace the oil pressure sender and switch while I'm in there. Need to buy a set of headers as the ones I thought I had turned out to be short tubes.


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[350runner]

Yes you will need lifters as well. You'll want to buy them from comp as well so both the cam and lifters "rock hardness" match. Heck just get the summit headers and throw a lil paint on them.save some cash. Mine been on two or three years now and still look good. And have great torque down low and awesome flow @wot

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[DoubleDingo]

I went with a GM Performance dual plane spread bore aluminum intake. Very pleased with it. Provides a very wide power band and set the carb up an inch or above the stock cast iron intake. For my cam I went old school, the Blueprinted 300 hp/327 ci cam kit from Crane(I got it through GM Performance as well, but it was made by Crane). Also very pleased with that. It peters out around 4,500 according to the Crane PDF. But there are so many choices with camshafts. If you google it, you will find 98% of the info is people wanting high rpm horsepower instead of low rpm torque. I personally don't like turning my engines over 3,000 rpm's.

The first time I drove my truck to my parents after the cam swap(I had already installed the intake with the vortec heads), the truck pulled the hills with ease. Pop and I took it for a spin and he noticed the increase in power too.

 

[DoubleDingo]

Yes you will need lifters as well. You'll want to buy them from comp as well so both the cam and lifters "rock hardness" match. Heck just get the summit headers and throw a lil paint on them.save some cash. Mine been on two or three years now and still look good. And have great torque down low and awesome flow @wot

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Yep, get a "Cam Kit". It will come with the lifters.

 

[Skweegle89]

85swb "Fancy"

I went with a GM Performance dual plane spread bore aluminum intake. Very pleased with it. Provides a very wide power band and set the carb up an inch or above the stock cast iron intake. For my cam I went old school, the Blueprinted 300 hp/327 ci cam kit from Crane(I got it through GM Performance as well, but it was made by Crane). Also very pleased with that. It peters out around 4,500 according to the Crane PDF. But there are so many choices with camshafts. If you google it, you will find 98% of the info is people wanting high rpm horsepower instead of low rpm torque. I personally don't like turning my engines over 3,000 rpm's.

The first time I drove my truck to my parents after the cam swap(I had already installed the intake with the vortec heads), the truck pulled the hills with ease. Pop and I took it for a spin and he noticed the increase in power too.

I'm not looking for top end hp. I have no intentions on going over 70mph. Lots of Low end torque is what I'm after. Now how about my push rods, rocker arms and springs? Am I good to keep those? Someday I will buy a 2wd and will have more interest in top end.


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[DoubleDingo]

As long as you're not getting a cam with lots of lift, the stock pushrods should be fine. But seeing you don't know exactly what you have, at about $2 per pushrod, a set of new stock length pushrods isn't a bad investment. And stock rocker arms are 1.5. I don't don't completely understand the different rocker arm ratios and pushrod configurations, so I didn't delve too far into researching all that.

If you're looking for torque, you want the powerband to start around idle and the high end to fall off around 4,500 rpm's from what I understand.

I went with the setup I have because of the vortec heads and the cam was installed in production engines from the factory. The vortec heads have a limit on lift in stock form, and I didn't want to have them machined for a bigger cam. Besides that, I prefer my stuff to be as stock as possible because it's easier to find parts if need be.