• Register Today It's free! This box and some ads will disappear once registered!

^^Searches ExplorerForum.com^^

331 stroker vs 347 stroker???


xplod50ho

New Member
Joined
October 24, 2007
Messages
3
Reaction score
0
City, State
Dawsonville, GA
Year, Model & Trim Level
1996 Ford Explorer
Hi,
I'm new here my name is Wes. I have a 1996 X 5.0.

I had a question I've read that the 347 stroker has had problems in the past with short engine life and increased oil burning. Caused from the connecting rod pin position and other from side load placed on cylinder walls. I have read that Coast High Performance has fixed the problem with their kit.

I'm about to get another car and let this sit and build it I'm just tryin to make my mind up right now what I want to go with. Thanks for any input.

-Wes-
 


Join the Elite Explorers for $20 per year. Gets rid of the ads! New $5 per month "try out" option.

Explorer Forum has probably saved you that much already, and will continue to save you money as you learn how to diagnose fix problems yourself and learn which modifications work without having to experiment on your own. Elite Explorer members see no advertisements, no banner ads, no double underlined links, can add their own profile photo, upload photo attachments in all forums, and Media Gallery, create and save more private Conversations, and more. Join Today. Your support is greatly appreciated.
















rocket 5979

Resident Gearhead
Joined
April 22, 2002
Messages
4,026
Reaction score
2
City, State
Lake Villa, Illinois
Year, Model & Trim Level
'03 XLT 4.6
Those oiling problems are a concern of the past with any reputable engine builder. Go 347 all the way.
 








Sams01XplrSprt

Southern Cali Explorer
Joined
November 14, 2004
Messages
14,262
Reaction score
1
City, State
Newport Beach California & Bay Area California
Year, Model & Trim Level
2001 Sport (sold)
welcome wes
 




xplod50ho

New Member
Joined
October 24, 2007
Messages
3
Reaction score
0
City, State
Dawsonville, GA
Year, Model & Trim Level
1996 Ford Explorer
Thanks for the links I'll definitely be reading on them some more.

I'm glad you said that Rocket. Cause I really wanted the 347 but I don't wanna put all my money into it and it poop out on me 50,000 miles down the road. Its gonna be a slow build when i start it, I just wanna know what I want the when I start. Finally got my truck payed off today and about to get a daily driver and let it sit. And about to start my new job making more money so hopfully I'll start soon.

Now if I want to put some boost on it. I was thinking Eaton charger from explorer express. I know its not big boost like some of y'alls but will the cylinder walls handle that??? I'm no expert with stuff, so I'm learning as I go and my dad is helping me.:D

Thanks
 




kaylene

New Member
Joined
March 22, 2006
Messages
34
Reaction score
0
City, State
montgomery ill
Year, Model & Trim Level
97explorer
What is the best cam for a 347 stroker in a explorer, is 110 lobe separation the best or 114 which would u guys pick, and the truck has spray to ,the cam they told me to install was a 35-775-8
 




rocket 5979

Resident Gearhead
Joined
April 22, 2002
Messages
4,026
Reaction score
2
City, State
Lake Villa, Illinois
Year, Model & Trim Level
'03 XLT 4.6
What is the best cam for a 347 stroker in a explorer, is 110 lobe separation the best or 114 which would u guys pick, and the truck has spray to ,the cam they told me to install was a 35-775-8


It would be a good idea if you created your own thread to ask your questions in so you do not bring this one off topic.
 




reserved50

Well-Known Member
Joined
April 21, 2005
Messages
1,269
Reaction score
53
Year, Model & Trim Level
2013 Sport Exploder
I went 331 and burn less than a cup of oil over a thousand miles, never bothered to research it and not worth it to me over 16 cubic inches to chance it. A lot of guys say the side loading of the 347 and thinner material on pistons above the top ring lands isnt so great under any detonation especially with a power adder. A few companies say they have made the 347 as reliable as any other combo, great:D.

http://www.compperformancegroupstor...=CC&Product_Code=35-775-8&Category_Code=FRDST

If that cam was ground on a 110 or so centerline I would say no, wouldnt have any vacuum, its on 114 though, see how the Mustang guys like it. If these trucks had electronic assisted brakes there wouldnt be an issue.
http://www.corral.net/forums/showthread.php?t=932490 , sounds like vacuum at idle might be on the iffy side...
 
Last edited:




CDW6212R

Hauls the mail.
Elite Explorer
Joined
June 17, 2004
Messages
19,944
Reaction score
1,272
City, State
Knoxville, TN
Year, Model & Trim Level
98 Limited AWD
I'm about to build a 332, I chose that because I know I want higher cylinder pressures with boost. There is a little more room with a 332 versus a 347 to add piston compression height. If you don't push the pressures too much, select the 347. I suggest that you avoid the EE supercharger for anything except a Saleen Explorer XP8 restoration. It makes low boost and little additional power, for its cost. I do not see $3800+ for 75hp or so as a good deal. I expect to spend around $2000 and gain 200-350hp. Any custom built supercharging will net you more than the EE kit. If you are serious wait for someone to sell you their used supercharger parts.

It only costs about $100 or so extra for a custom cam. I would say for any engine, deal with a real cam expert, and have a cam designed for your vehicle. Regards,
 
Last edited:




xplod50ho

New Member
Joined
October 24, 2007
Messages
3
Reaction score
0
City, State
Dawsonville, GA
Year, Model & Trim Level
1996 Ford Explorer
Yeah I read on one of the links they gave that if 347 is built right you could add a lil boost and not worry. But when it comes to money I can't afford to let it blow on my after its complete.

I was just using the X-charger as an example. It doesn't really seem worth it. When, like you say, get a Vortech or Procharger even cheaper.
 




rocket 5979

Resident Gearhead
Joined
April 22, 2002
Messages
4,026
Reaction score
2
City, State
Lake Villa, Illinois
Year, Model & Trim Level
'03 XLT 4.6
Yeah I read on one of the links they gave that if 347 is built right you could add a lil boost and not worry. But when it comes to money I can't afford to let it blow on my after its complete.

I was just using the X-charger as an example. It doesn't really seem worth it. When, like you say, get a Vortech or Procharger even cheaper.


You can boost a properly built 347 to the moon if you want to. I have personally seen boosted 347's putting down well over 1,000rwhp. If they are built to be boost friendly then they will be no problem.
 




justin146

Well-Known Member
Joined
April 8, 2001
Messages
2,213
Reaction score
0
City, State
Oxford, MS-- home of the Ole Miss Rebels
Year, Model & Trim Level
2000 XLT Sport 5.0 Turbo
You can boost a properly built 347 to the moon if you want to. I have personally seen boosted 347's putting down well over 1,000rwhp. If they are built to be boost friendly then they will be no problem.

In an aftermarket block :)
 




rocket 5979

Resident Gearhead
Joined
April 22, 2002
Messages
4,026
Reaction score
2
City, State
Lake Villa, Illinois
Year, Model & Trim Level
'03 XLT 4.6
In an aftermarket block :)


***Grey Poupon*** "But of course"... ;)




That stocker block will snap like a twig at power levels far below what I was talking about.
 




justin146

Well-Known Member
Joined
April 8, 2001
Messages
2,213
Reaction score
0
City, State
Oxford, MS-- home of the Ole Miss Rebels
Year, Model & Trim Level
2000 XLT Sport 5.0 Turbo
***Grey Poupon*** "But of course"... ;)




That stocker block will snap like a twig at power levels far below what I was talking about.
I am about to make that next step- I got my new headers on the way along with a MP T70. I am shooting for about 600 at the wheels this time. I was looking into building a Boss (original) blocked 331, but I dont know if I will run into oil pan clearance issues. I may go with the new Boss block and GT40x heads.
 




rookieshooter

Moderator Emeritus
Joined
March 13, 2005
Messages
7,296
Reaction score
1
City, State
Martinsburg WV
Year, Model & Trim Level
84 BII "Li'l Samson"
Hi,
I'm new here my name is Wes. I have a 1996 X 5.0.

I had a question I've read that the 347 stroker has had problems in the past with short engine life and increased oil burning. Caused from the connecting rod pin position and other from side load placed on cylinder walls. I have read that Coast High Performance has fixed the problem with their kit.

I'm about to get another car and let this sit and build it I'm just tryin to make my mind up right now what I want to go with. Thanks for any input.

-Wes-
Wonder it they went with a longer rod by moving the wrist pin futher up in the piston? This would decrease the side thrust and also at the same time come up with a better connecting rod angle to crankshaft location at optimum combustion during the downward thrust. Might even have offset the wrist pin towards the inside of block more and then added some kind of thrust buttons on the thrust side of pistons. Just a hunch.
 




CDW6212R

Hauls the mail.
Elite Explorer
Joined
June 17, 2004
Messages
19,944
Reaction score
1,272
City, State
Knoxville, TN
Year, Model & Trim Level
98 Limited AWD
The 347's use the same pistons as a 332, thus there is no strength to be gained in combustion pressure control. The 347's have been around long enough to see how the cylinder wear and oil control is, compared to a 332. There is no evidence to say that one is better/worse than the other. I'm building a 347.

Justin, contact Camshaft Innovations about heads and cams, Jay told me a good bit about heads and their designs. Many are copies of others, and the new Ford head(X340 or something) is a design copy of another, they have worked out a deal to avoid lawsuits. Jay has dealt with all of the big heads, I knew that he could evaluate what I needed. He was honest with me and the head that he suggested was one of two that I was considering.

Buy a Dart Sportsman block if you can, they are a hair better, and you can use their large version and run 4.120 bores easily. FYI, the steel Explorer 302 pan has more clearance for a girdle and the mains. Regards,
 


Join the Elite Explorers for $20 per year. Gets rid of the ads! New $5 per month "try out" option.

Explorer Forum has probably saved you that much already, and will continue to save you money as you learn how to diagnose fix problems yourself and learn which modifications work without having to experiment on your own. Elite Explorer members see no advertisements, no banner ads, no double underlined links, can add their own profile photo, upload photo attachments in all forums, and Media Gallery, create and save more private Conversations, and more. Join Today. Your support is greatly appreciated.




justin146

Well-Known Member
Joined
April 8, 2001
Messages
2,213
Reaction score
0
City, State
Oxford, MS-- home of the Ole Miss Rebels
Year, Model & Trim Level
2000 XLT Sport 5.0 Turbo
FYI, the steel Explorer 302 pan has more clearance for a girdle and the mains. Regards,

I was more worried about the rear main seal of the Boss block working with the Explorer pan.
 




Similar threads

















Top