hey guys, has anyone taken a 302 and made a stroker out of it.My bronco has a 351w in it and its getting ready to go. I have a 302 block that I had reconditioned. I had it line bored and punched out 30 over. What my question is can I put a 351w crank in it and make the 302 into a stroker. I know that both are a small block, and that the intake and the distributor cant be interchanged but I believe everything else can. I have a new crank kit and rods. Can the 351w crank go in the 302 without any problems. I know they both have a 4.0 in bore and the 302 has 3.0 stroke and 351w has a 3.5 stroke. Ive made strokers before but when I got a price for a stroker kit for the 302 they wanted 2200.00 .Any input would be appreciated. Any problems that might occur would also be appreciated

 

Look around you can get stroker kits from summit and jegs for 1300. I have even seen them for 900 in other places, so look around. I know nothing about this company but they have an add in mmff central coast mustang no website 661-823-2400 is the number. they have a assembled shortblock $1995 that is a 327 or 342 stroker your choice. They also have a 327-342 kit forged pistons, cast crank, race bearings, all balanced and good for 600hp (just printing what the ad says) for $999. Check that out hope it helps

 

I would recommend selling the 302 block and building a 351 as the most economical/efficient/rewarding move.

 

But guys, he asked if a 351 crank will fit in a 302, and. if so, will it stroke the motor. I seem to recall that the 351 pan won't fit the 302 because the seal is bigger, which implies a bigger journal on the crank, but maybe I'm imagining that.

 

I agree he should build up the 351, and mail me the nice 302 block because I'm a nice guy!

 

What year 351W block do you have? I have a stroked 351W to 393 in my 72 Ranger. But is a 90 block, one peice seal, it cost about $3000 to build, sometimes that is hard to spend that much on a motor. The 393 is a power-house, have not been out-ran, even had a Dodge Dekota RT with extras try, but got him by one car length. I have some engine plans for the 351W that works well, it would do about 300+ hp at crank, and inexpensive to build, a quality motor. I like to build my own motors, but the price of creat motors have gotten a lot less, and you'll save money on them. Also, the 302 block would nice good to use, as long as it's not a 70s block with a high deck height, the compression is low, but the machine shop can take care of that. How ever you decide to go, both will work fine if built right, ALLWAYS USE QUALITY PARTS.

 

A decent 393 should have walked that snail of a RT unless the "extras" included N2O.

 

Swapping a 351 w out for a 302 involves a few more details...you will have to swap out your intake, exhaust manifolds/headers, Y-pipe, oil pan, and some of the accessory drive brackets up front. You will also have to get a 302-spec flexplate/flywheel. The stroker 302's are best suited for light mustangs, not full-size trucks....stick with a 351 and build a 393 out of it....like previously suggested.

 

Why?

 

No low end torque....
Ford created artificial low end torque with the FI motors, by using long runners and small exhaust. With the first modification you make, the peak torque always moves up, creating a doggy low end. Also, you will never get low end torque out of a 302, unless you use a roots supercharger or screw compressor, as about the best you will realistically get with a 302 is around 350-375 lbs./ft, max, and that will be up high in the rpm range, and unusable for a heavy truck. I don't hate the 302, I just think it is a bad choice for a truck....I think the 300 I6 is a lot better truck engine for the cubic inch size.

SO far as the stroker 302's go, you are going well beyond the normal rod/stroke ratio for a 302, and everything just wears out faster if you use the engine to pull heavy loads constantly(puny bearing journals, horrendous side loading). Not very many drag racers or road racers I know use the 347 stroker, prefering either a 331 or a forced-induction 306, and the majority going with the 306. I would rather use the 351w with the giant bearing journals and stronger block for use in any truck that will see any towing or prolonged heavy load hauling.

 

Hi mdh627. The 351 crank won't fit the 302 block because the 302 has smaller bearing diameters than the 351. You could check out the latest ford motorsport catalogue because they sell a 302 shortblock built into a 347 stroker at the factory. Also, Lunati makes a 349 stroker kit now, if you want to use your own block. But I do think the 351 stroked to a 393 would be the best route.

 

Ok, here we go. Are you telling me that by increasing the displacement of an engine I will lose low end torque? You have got to be joking. Artificial? Engine design creates artificial power?
You could do it NA, or better yet, turbo.
Really, how about 380lb ft @ 4200 on a stock cam, stock displacement NA 302. Its been done. Factory tq ratings are only 300lb @ 3k. The modifications did nothing but move the curve up. Its making better than 300hp @ 3k, but the peak number has moved upward. And that is generally the number that mag racers like to quote. 375lb max?, better yet 500+hp & tq on a stock bottom end 302 with a set of junkyard t3's. Also been done, and lived a long life of drag strip abuse. A longer stroke is only going to improve these numbers throughout the entire curve.
This could be argued either way.
I agree with that in theory but have yet to have it proven to me.
You need to hang around more drag racers as 347's are rampant at the track. As well as the slightly smaller 331. The 306 is only an overbored 302, I tire of hearing people talk about this CI as if it were a custom designed displacement. The majority go with it because it is cheap to just rebuild a 302.
I am in total agreement.

 

While a 351W can be made to physically fit a 302, the amount of grinding to reduce the journal and counterweight diameters is considerable and will weaken the crank into uselessness. Lunati makes a 302 stroker kit that uses a 3.5" stroke crank, 5.4" rods and short pin-height pistons.

 

As was mentioned above........ If you can figure out a way to live without your truck for a couple weeks or so pull the 351w and rebuild it. Your getting 50 more cubes out of it and don't have to go and buy $1000 worth of extra parts to do so. Plain and simple this is definately your best choice. There is a saying that there is no replacement for displacement. Why go spend a $1000 or more to get 347 cubes out of 302 when you already have a 351???

 

I am a member of Ford Racing club {Slo-Boy Performance}, one of our motors was featured in 5.0 magazine, having the 7th fastest Mustang in the US. The motor was a 347 stroker, but this was a feature Motor beging the best of two shops, each spliting the bill. I have built a few 347 myself, and I like the late model 351 block, but if you want to spend the money, you can order a 4 bolt main 302ci block that is one bad boy!! Most people including myself, do not and will not spend this kind of money to build a motor, unless you are racing. I know of guys that have borrowed against there homes to have enough to build that bad boy motor. Does anyone know what kind of{auto} transmission a lot of guys are using on the strip? The first time I seen on in a buddys Mustang, I did not know what to think. It's a GM, but what do you think it is.