what the best engine for the mav

ok guys been gone for a while well my 302 has given up on me bent a push rod so yea need to put in a new block was wondering if a 351c would fit inside the car mines a 1970 has anybody given it a try also considering putting in a 302 stroker but not shure how far to go hearing some bad coments about doing a 347 i hear the rings burn out quick and a 333 well not a lot of power there if anyone has any good ideas would love to hear for yea going to start this project next weekend once i get more info or some good ideas

 

I say go the 347 route. For a 351, you should shave the shock towers as I hear it's a pain in the ass to change spark plugs without doing so... I'm not too sure about the rings going quickly on 347s, my cousin has had one in his daily driver(and only car) '73 Mustang for bout two years now and the sucker runs as hard as it did the day he got it running...

There's also a turbo 4 lurking around here somewhere..

 

I am doing a 347 for a my Grand Marquis with a stock block pushing everything to the limit. I have a friend with a Mustang shop in FL who builds 347's all the time pushing 550+ hp that are still being raced today. And they were being built about 7-8 years ago now.

The oil ring problem was when they first started doing the 347 a number of years ago.

The 331 is a good set up too. If you took the same combo for the 347 as the 331, supposedly there would only be about a 20 hp difference.

Remember, the more people who are asked the more different answers/ opinions you will get!!!

Good luck

 

Nothing wrong with a good little Windsor...
Is this a streeter/ daily driver? Race car? What ?

BTW,a Cleaveland will fit, but a PINTA.

For the investment a 347 is all you need. If your gonna race it HARD, go with the new Boss 302 block from Ford Racing. Stockers will split in half, when you get around the 400+ HP mark. but then Im talking about a 8,000RPM dragrace engine too. Alot of varibles out there.

Be more spcific, and someone can suggest a spec.
Al

 

The oiling issues have been corrected with the wrist pin in the ring package so don't be scared of the 347. The 331 has a much better rod angle so the block will last longer. My little 331 runs high 10's in the 1/4 all day long with no power adders so they can run with the 347's. I recently took my motor apart and found that after 550 1/4 mile passes the bearings still look brand new! I'm not even going to change them. Only go with the windsor if you already have it available cheap or have the need to run in the 9's at the track.

 

"I say go the 347 route. For a 351, you should shave the shock towers as I hear it's a pain in the ass to change spark plugs"

"BTW,a Cleaveland will fit, but a PINTA."

A 351C will fit in a 1970 but both of the above comments are true to some extent.

Super easy to go with some form of 302 but harder to go with a 351 Windsor or Cleveland.

 

well it going to be a weekend driver i love to take it to the track and let it rip do a lot of street racing on the weekends the shock tower shave is not that hard it just alot of thing u have to do but if im taking out the motor might as well to just have the space so as im see were gonna go with the 347 set up so any recommendation on what kinda of block to use i know the 302 boos would be good but that kinda of hard to find down hear and getting it brand new i think i can just buy a new 351w from jegs but i kinda like the 302 block and im a clevland fan so yea any suggestions on the 302 block i had a roller and it did very well should i just find the same thing

 

I vote 331 stroker.
A 351c fits though if that is really what you want.

 

For a streeter, a roller 302 would be just fine. You could always up it to 347 later.
The shocktower shave would help with header clearance though.

 

To each his own...but if you are going to put a stroker kit in it, why would you suggest that he go go 331 instead of a 347?

To quote Jay Allen " People build 331s because they don`t want to go as fast as a 347."

 

My 331 is faster than my 347 with all the same parts. I can't explain why though. Also the 331 will outlast the 347 hands down especially in a power adder situation. 351w will make much more power but with added weight and expense. 351c is ok for the cool factor but you really have to turn the engine a lot of rpm's to take advantage of the heads. So maybe people build 331's because they want their engine to last longer than a couple of years. Like I said before I have over 2000 street miles and 550 1/4 mile passes at 7600 rpm's on mine and the entire bottom end still looks new. I'm not saying all 331's are faster than 347's because this is not typical I'm just saying that some can be.

 

I`m not going to argue with anyone here (not my style):Handshake BUT...
You need to take the time to go over to http://sbftech.com/ and Read.
All of the Myths about 347s not lasting as long are just that ...Myths.
Jay Allen Owns Camshaft innovations and was formally employed by Team Glidden as in BOB and BILL. He still works with them directly,He also spent some time employed at Trick Flow.(Got Vic Edelbrock on his speed dial!) and he and Bill Glidden often tour the country Doing siminars on Camshaft/engine design and theory. If you go over and look around on the site you will learn that just about every statement you made in your above post is incorrect. But YES there are 331`s that are faster than 347s.Jay can Help you understand why your 331 is faster than your 347. For the record...I have outran some 393`s with my 308...It happens.

 

My 347 will has spanked many a BBC at the track....the old saying of no replacement for displacement only counts when all is equal in the build, suspension, tires and driver.
As far as longivity, it is now a complete myth....years ago when the stroker market hit, yes there was issues with the longer stroke, but that has been taken care of.

 

I'm using the 5.4 rod with 3.25 stroke on the crank. What combos are you guys running with the 347? Would'nt more stroke on the crank increase the rod angle? More rod angle would cause it to pull on the side of the block compared to less rod angle would'nt it? This has been my experiences with the 347 even with the new piston designs. This ofcourse has been over an extended period of time. Don't get me wrong I love the 347 I own a few and will continue to build more in the future. I also know that small motors can go fast. Tim Freeman is a friend of mine that was Ron Krisher's crew chief for a few years and is now wrenching with Lee Sharp and a few other comp and super stock guys. They're running 270 inch motors in the low 8's in the 1/4. But those are some serious engines.

 

AND, John will sell you his! Check out the classifieds!!