Ok i need some info. When do you need to change internals? I've seen that the crank is good past 400 the pistons are go till 300 and the rods are good to 250 or something like that. I plan on putting a supercharger on my car with a 55 shot of nitrous. What part do i need to change. I've searched for it and can't find it. So plez help me.

 

If I were you I would change the pistons & rods. Crower rods w/Ross pistons. You "may" get away with the pistons(rods should hold) but while the motor is open you might as well do it all.

 

It all depends on how much power you plan to get out of the supercharger....

There are some folks running SC's with mild boost right now and no internal changes. What are you looking for? How do you plan to get there(what blower, EMS)?

Context, my son. We need context wink

 

well that's the biggest problem. there really isn't one for the tibby. I'm hoping sr's comes out soon. but i want all the power i can get. any sugestions?

 

pistons - 235 whp
rods - 300 whp
crank - never heard of any problems (not even with the 800hp tibbies in Korea
axles - depends on your traction

What kind of setup, exactly, are you planning?

Ballistics sells low compression pistons for a very good pirce.

 

if i go with high compression and a supercharger will he motor last? So basically i need to change the pistons for a supercharger and pistons and rods for a turbo. does anyone know what sr sc is gonna produce?

 

Yes, we do change the pistons out mainly for strength and duability issues. But also you can add in design, the surface area of a turbo piston is designed differently then an N/A piston.

Remember, the motors normally sucks in air, and now you are force feeding it.

Now the other reason to change out piston is to lower compression. in 9:1 or an 8:1 the tolerences are not as tight as in 10.3:1 so the tuning does not need to be as precise. Which is crticial in a turbocharged setup. and its less hassel to lower compession and turn up boost.

Now a S/C is a bit different, the increase of boost is linear, it increases per rpm. Also, most supercharges dont go above 8psi, be lucky if you get 10psi or 12psi. So you end up using a higher compession piston out of the fact you would want more power, but also, being the boost curve is linear within a s/c setup, the tolerences are not as tight as in a t/c and so you can use higer compression piston.

shoot, I started ramblinf again. I bet ya all did not understand me.

Basically. Get some pistons made to order along the line of the stock ones. But just from a stronger material and you should be good.

 

Superchargers don't work well on the beta engines. IMHO - Don't waste your time.

 

well i don't wanna throw out my header i just bought. So i'm gonna do s/c. because if i don't i'd have 800usd just thrown away.

 

I agree with the info stated above.

I also agree that a supercharger for the Tibby is a waste of time.