I have heard TPI's pull out a lot of torque how it is. Now if I made my 355 a 383, would I be able to hold the car down with some decent suspension mods

Sportline springs
Lift bars
LCA's w/ relocation brackets
Polyurethane bushings

and a 4.56 set of gears in the rear?

I am REALLY thinking about stroking my motor over the winter. I am planning on going Stealth ram also... will this and a decent size cam(230@0.050) be good with a t-56 and a 383?

On the cam, I went roller also (if that will make a big difference)

thanks
Cory

 

The current record for stock style rear suspension is 8s. Your results may vary...

 

PLanning on only Running 1/8's ?

 

4.56's with a 6 spd... I've already had 4.88's in an old malibu with a 700-r4 and made a 1/4 mile pretty damn well.

 

The problem with using the 4.56 is because of the BENEFIT of the TPI setup. It will make super strong low and mid range torque. Using the stealth ram will give up some bottom end torque, but has been proven to add a good bit of HP up top, depending on the engine combo. Again, the problem is getting it to hook. Not to mention 1st gear will be useless on the street and pretty much on the track. You'll be shifting REALLY quick to get out of the lower gears.

And the problem here lies in getting the car to hook. When you start getting GOOD launches with the 7.5" style rear is when you'll start seeing durability issues.

I'd check the gear ratios of the T56 you'll be using and check the RPM's for each gear at certain speeds by using a online calculator.


HTH

 

Where can I find that?

Would I be better siamesing the SLP runners..... or going superram?

My cam is gunna be more midrange... and I will be shifting up around 6500

I also am considering going 383... sooooo too much torque... I need steeper gears to handle the torque to the ground to get outta the hole better. ...

 

Stealth Ram, Mini Ram, or LT1 with the gears you are talking about.

You will be out of the powerband at 6500 with a LTR setup.

Actually lower gears (numerically) work better with low end torque.

 

The last post was dead on.

With 4.56 gears, you're going to HAVE to have an engine ( this includes cam, valetrain, bottom end, intake, exhaust, and fuel ) that can REV.

With the 700's LOW 1st gear, you won't be able to BUY traction off the line using 1st gear, without major suspension mods and slicks.

Stock TPI is good up to 4500-4800 RPM, so IF you're keeping this, build the engine to make it's PEAK HP around this RPM, or a TAD above.

The stealth ram, mini-ram etc all tend to make a GOOD bit more UPPER RPM power, at the sacrifice of some bottom end torque. If you're using 4.56 gears, you'll NEED to pick up some high RPM power, as you'll be revving HIGH.

While a 383 CAN be built to rev this high, the PRIMARY benefit of building a 383 engine is it's ability to throw out alot of low end and mid-range torque. You'll be wasting this torque with LOW ( high number ) gears.


Figure out what you want out of the car when you're done, and what things you're willing to compromise on.


HTH