302/357 stroker? Yes 8.2 DECK 357W. - Mustang Evolution

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Old 06-02-2013, 07:35 PM   #1
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302/357 stroker? Yes 8.2 DECK 357W.

Im curious if anyone knows what bore and stroke I need to make 357 CI from a BOSS 302 Block with a 8.200 deck that is 363 capable?
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Old 06-02-2013, 07:44 PM   #2
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4.065 Bore and 3.440 Stroke come to 357.16 CID yes?
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Old 06-02-2013, 07:54 PM   #3
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I thought a 355 was the biggest you could go on a 302?
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Old 06-02-2013, 08:06 PM   #4
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I did too for the longest time or at least thats what I was told years ago. FRPP released a revised aftermarket version of the old BOSS blocks some time ago and are 363CID capable. I also realize now that Darts Iron Eagle Sportsman Block for Windsor engines is now 468 CID capable but I think thats for 351 Based Deck Height Windsors.
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Old 06-02-2013, 09:31 PM   #5
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My next question, will a 357 stroker kit intended for use on a 351 work on a 302 if im using the boss block? And why or why not?
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Old 06-02-2013, 10:00 PM   #6
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Quote:
Originally Posted by DieselStang View Post
My next question, will a 357 stroker kit intended for use on a 351 work on a 302 if im using the boss block? And why or why not?
A 357 based off a 351 is nothing more than a bored over 351. A stroker kit for a 351 won't work for the 302 because of deck height. The reason a boss can be stroked to 363 is because you can bore it to 4.125 vs the 4.06 on a factory block.
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Old 06-02-2013, 10:07 PM   #7
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But the BOSS block is suppost to be able to accept up to a 3.5 crank also which is what the stock 351 is using. By my calculations a 4.060 Bore and a safe 3.440 stroke come out to 357 CID.

Ive done more and more research and what im finding is a 351C stroker kit could be used on a 302 block if the journals are machined down.
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Old 06-02-2013, 10:12 PM   #8
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Ehh i dont know, i would think the connecting rod length might be different. But if their both 357's they should be the same i guess... heck i dont know lol

---------- Post added at 10:12 PM ---------- Previous post was at 10:11 PM ----------

Or crank
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Old 06-03-2013, 03:26 AM   #9
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If you are using a BOSS block and are going that high just go all the way to a 363. Or just save money and get a stock 351 block, bore/stroke it to a 408 and blow your tires off at 80mph with a blip of the gas pedal.
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Old 06-10-2013, 09:28 AM   #10
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May just go for the 363 because it may be cheaper but I am thinking the 357 with the bore and stroke I stated will potentialy make more power due to better P/R Ratio with lighter pistons and rods and giving up only 6CI. Im looking at the 357CID displacement specificly because it will enable me to run the next level of ported heads. With this straight motor build pushing over 500RWHP on pump gas would be my imidiate goal. Ultimatly Im considering how cheaply I can get into the 9's and at the same time fake out anyone who decides to look the car over.
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Old 06-10-2013, 11:32 AM   #11
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Once again if you are considering cost the 351 based build is going to be less money than an aftermarket block 302 combo. You can keep it right at the stock stroke to get the 357 cubes too or just go all out to 408/427. Honestly anyone you are trying to fake out who knows what they are looking at will be able to spot the aftermarket block/heads/etc... even if its still the 8.2 deck height. And if they don't know they won't see the difference between the 351 either. The 351 is better in every single regard and drops right in. Still no idea why ppl spend money on aftermarket 302 blocks for builds where the goal isn't even close to the 700-800hp mark.
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Old 06-10-2013, 02:41 PM   #12
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Good points to the 351 I have known them for many years. Thing is if I can get a a old boss block it will wont have the apearance of an aftermarket block. Combo includes TFS TW heads, PP Typhoon, 1 3/4 shortie headers. The idea is to make the engine look like its maybe a 400hp stroker using Anderson Ford Motorsports gear. With that said I may use a new boss block and hope no one takes a second glance when the hoods up. In reality the heads will be ported by fox lake and the intake extrude honed to match along with a trick cam to exceed 500hp and push me into the 9's. Im still researching but I beleave its doable.
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Old 06-10-2013, 02:50 PM   #13
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And of coarse I will compair cost to my NMRA R/S combo. I have plenty of time to decide what to do, just need to make sure I do it right this time around. I would greatly enjoy having a car that far exceeds everyones expectations, it would definatly boost the fun factor of my next build.
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Old 06-10-2013, 03:49 PM   #14
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Just curious, why do you care so much about the motor looking stockish? And even if you fool someone visualy, when you put a bus length on them down the 1/4 they'll know something is up.
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Old 06-10-2013, 04:58 PM   #15
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Of coarse they will figure it out when they race me but by then itll be too late. And of coarse bragging rights are the reason I care.. And when a big mouth yapper comes along talking crap it would be nice to put him in and his wallet in its proper place. Besides I have way too much time invested in my love for stangs to have another bolt on car that most people will walk all over.
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Old 06-10-2013, 05:42 PM   #16
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Yeah true that, there is always someone faster though but if you have a 9 second car you will likely be king of the street. Well maybe not around NJ where its like a Stang Mecca but in most parts... Hell, my low 13 second bolt on PI car is faster off the line and for the first 1/8-1/4 mile than almost anything I come across on the street. Gears, sticky tires, lighter than most stuff made today and the driver mod all go a long way haha.
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Old 06-13-2013, 07:56 PM   #17
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It all falls apart without a good driver. Im in Dallas, home of Dallas Mustang, Gear Heads and HPP just to name a few of the local high performance mustang shops. Dallas is also home to the only RUFF car dealership in the states, LG motorsports, JoTech (owned by the real johnny tran who runs a first gen supra) and a literally hundreds of performance shops. Flooding the streets on grudge match nights everything from 8 second AWD Turbo Talons, nitrous and turbo'd Ferrari's, 1000+HP Supras, LSX Powered Camaro's, and more conquer the highways. I would by no means be king of the street around here nore would I try to be. But if I can build a mid 9 second monster that looks like a 12 second bolt on stang with no power adder and me picking and choosing my victims I will put the hurt on alot of local smack talkers.
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Old 06-20-2013, 11:02 PM   #18
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Diesel, I wish I would have known you were in Dallas, I just moved from there last Nov.
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