Replacing 351W any upgrades should make??

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Dec 11, 2012 | 06:09 PM

#16

Blown349

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Joined: Feb 2007

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Quote:

Originally Posted by Shwan_89HD

So if you just swap out the cam for an aftermarket cam and have everything else bone stock, your gonna see a big difference?

That depends on the stock cam. In this case he is replacing a stock flat tappet cam with a roller engine and cam.

Dec 11, 2012 | 08:35 PM

#17

Shwan_89HD

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Joined: Dec 2011

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From: Harlingen,TX

So the the factory cam for a 351w is a flat tappet? and whats the difference between a flat tappet and roller cam? which is better

Dec 11, 2012 | 09:43 PM

#18

Conanski

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Joined: Jun 2006

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From: Ottawa, Ontario

You're gonna have to go do some study on the matter to get all the details, but the short version is a flat tappet lifter just has a flat bottom surface where it contacts the cam while a roller lifter has a roller on it, so as you might expect there is a lot of friction involved with a flat tappet cam and virtually no friction with a roller so it lasts longer and puts more power to the ground.

The 5.8 had a flat tappet cam right up until 1994 when the block was updated to accept the factory roller cam assembly, after that most of them left the plant with the F4TE(Explorer) cam in them.

Dec 11, 2012 | 09:48 PM

#19

Conanski

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From: Ottawa, Ontario

Quote:

Originally Posted by Shwan_89HD

So if you just swap out the cam for an aftermarket cam and have everything else bone stock, your gonna see a big difference?

, The truck will need exhaust too because the factory system is also pretty bad, but yeah if you use one of the cams that's always being suggested on here you're not going to mistake it for a stock motor.

Dec 14, 2012 | 08:46 AM

#20

grosseile88

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Joined: Apr 2011

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From: Atlanta, GA

Thanks for all the input!!! Spoke with my mechanic today and he is going to pull some numbers together on change out.

Jan 23, 2013 | 03:19 PM

#21

grosseile88

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From: Atlanta, GA

Ok finally getting ready to pull the trigger on this engine replacement and reached out to two mechanics. One of them quoted me $4200 (ouch) and the other $2700 (which is around what I estimated in my head). The $4200 quote I know for sure is a Jasper engine, the $2700 I am not sure but will ask but does come with a 3 year 50k warranty. I have worked with the higher priced mechanic in the past and trust his work but a $1500 difference is steep!!!! Anyone no a good source to locate or know of a reputable mechanic for this type of job in the Atlanta, GA vicinity??? Thanks!!!!