Supercharge a Stock 302

[Justin]

My friend know a guy in TX who builds hot rods for a living and he has a supercharger for sale for the 302 for cheap. What would i need to do to my motor in order for it to handle the S/C. Its has nothing done to it so it compleatly stock.

[trickflow5]

if you want some real power you would need to upgrade and rebuild everything. that includes pistons rods crank heads cam intake and injectors. if you are looking to put it on the stock motor. you would need some headers, a larger fuel pump, an adjustable regulator, and possibly a timing retarder. a larger throttle body would make a big difference when putting a supercharger on a stock application.

[MonteCitan]

Minimum you'd need larger injectors, higher flow fuel pump/ PCM chip..

And that's assuming the SC comes as a kit?

[trickflow5]

Oh yeah how much is he asking for your supercharger. depending on the boost. it will probably give you a 25% to 40% boost in horsepower. which should up the 225 horses to about 280 or so. with a motor that is already pushing 400 it could give you alot more.

[Justin]

im not sure...how much yet...its a friend of a friend so prolly around $400 - $500... from what my friend said something about a boost reg... i dont know alot about it...could someone go into detail a lil bit about the boost, boost reg and everything..

[bluemustang]

oh boy well let me share my experience. I did this 2 years ago on my stock motor at 100K lasted till about 135K before i blew something in the motor

All i would advise besides larger injectors, higher flow fuel pump, chip is a really safe tune i mean seriously i was maybe if lucky pushing 5-6 psi on my motor and thats with high miles and all you know. Maybe it was just my motor you know but honestly it sucked ass when i blew something.

In the end id do it again i enjoyed that power right there good times. just be smart about how much you wanna push out of that stock motor of yours you know

[Justin]

I want to push enough to make a diffrence but im not tryin to blow anything up.. Would you say its safe to run 6 - 8 psi? or what would u suggest?

[SpectorV]

I would save the money and build me a new motor when its done drop it right over so you have no down time other than tunning working out little this and that issues.

[bluemustang]

Quote: Originally Posted by Justin I want to push enough to make a diffrence but im not tryin to blow anything up.. Would you say its safe to run 6 - 8 psi? or what would u suggest?

Id go to about 6-7 psi you shouldnt have much just dont beat on the car all the time. That was prolly another factor

[Justin]

K thanks for the help...

[bbunt302]

I know a guy running a Vortech T-Trim on a stock 302 bottom end. It's still holding together fine at 16 psi.

Fear not the boost.

[silverstangboy]

it really depends on the mileage of the motor, would I put one on a 105 K motor? no... would I put one on a 50 K motor? hell yeah, in fact some times I wished I had went that route, it is the much cheaper way to make power.

[bbunt302]

Quote: Originally Posted by silverstangboy it really depends on the mileage of the motor, would I put one on a 105 K motor? no... would I put one on a 50 K motor? hell yeah, in fact some times I wished I had went that route, it is the much cheaper way to make power.

Actually the one I speak of (Billy from the Ford place if you remember him) is well over 100k. I don't remember the exact number, but it's something pretty crazy.

Of course, the thing is a ticking time bomb. But the point is that these motors will hold up to a fair amount of boost in stock form.

[Zim]

itd be fine as long as your cars been regularly maintenanced. 5-6psi is not going to hurt you. You dont even NEED larger injectors... an FMU would work fine at that low boost.

I would recommend a tune for sure though, just so you're not running lean. Thats what blows the motor.

Headers are completely unnecessary in a s/c application.

[Justin]

Just for the record its sold already but if i were to get one i could run 6 - 7 psi and not need anything extra?

[bluemustang]

Quote: Originally Posted by bbunt302 Actually the one I speak of (Billy from the Ford place if you remember him) is well over 100k. I don't remember the exact number, but it's something pretty crazy. Of course, the thing is a ticking time bomb. But the point is that these motors will hold up to a fair amount of boost in stock form.

thats some shit right there let me tell ya cause my shit didnt hold for to long ah wells just makes me upgrade earlier

[svtlx]

@ 6lbs. -7lbs. u realy dont need much more than an adjustable fuel regulater...u don't realy need larger injectors even wit 9lbs. run'n a stock cam and heads....9lbs. or more u difinatley need a larger f. pump like sumone else said.....if da motor ain't tik'n or nuthin, throw dat bytch on, run 2 heat ranges below stock spark plugs, retard the timing a bit, adj. fuel pressure (a lil rich is better than a lil lean). and go!!!!...a friend of mine is push'n 638 @ crank wit stock bottom end and block. u should do more research on s/c before u purchase one.....i have books on building s/c motors, and supercharger & turbo theory, and sum friends wit stangs that r run'n 11-9's in da quarter wit boost....i can send u sum articles....deifinatley educate yourself before make'n a purchase....u will b sooo glad u did....everything u know bout build'n big horse on a n/a motor changes a bit when u run boost....anyway, just b careful when puchasing a used s/c.....there's a reason it's for sale....i have alot of info in books and dyno test i can send u if u r interested....i have'nt put my s/c on yet, but i'm setting the motor up for it as we speak.....increased exhaust flo on da heads, 8.2:1 compression pistons and etc.......i will help u as much as i can, if i dont know the answer i will ask one of my buddies that r runn'n 18lbs. of boost +. good luk wit dat!...and hpoe u find another unit.

[rocknbronco]

just for the record I would build it to hold the power it could produce so you wouldnt have a time bomb on your hands that would cost you more in the long run.

[svtlx]

Quote: Originally Posted by rocknbronco just for the record I would build it to hold the power it could produce so you wouldnt have a time bomb on your hands that would cost you more in the long run.

the only thing that makes a s/c a time bomb is if u r run'n too lean, or have the timing advanced to much....if u r run'n less then 14lbs., thus not needing an inter/after cooler....anyway i don't think i have a good grasp on the discussion so i wil b quiete.

[svtlx]

anyone here have experience wit blow - off valves?....im try'n to pic one out...even though i don't realy need one for only 9lbs. of boost....suggestions guys? i luv dat whoosh sound!

[rocknbronco]

My friend is using one from HKS on the SER and I have one from a Blue Bird,not the bus,for my future SR20DET swap in the S13 stock Nismo I would stay away from the HotShot as its cheaply made and wont allow you to build enought pressure or well boost due to its plastic body leaking.