Insight Needed From Boosted Owners/Builders - Need Advice

bullitt5897 · 04-19-2019, 10:21 AM

Quote:

Originally Posted by AstatenateZ

So I've owned the Z for nearly 2 years now. I've pretty much done every bolt on + tuned. It's mainly for looks as it's low, got wide wheels, I am looking at switching it up. Light wheels, raise car back up to 100% functional, meaty tires, etc.
My main dilemma is I just accepted a new IT position at work, bought a house. Fortunate enough to not have kids or a wife. Only a girlfriend who mostly supports my car addiction.

I am in the market for a used GTR (around 55-65k), but obviously my financial mindset (I am fortunate to have at a young age) tells me just boost the Z and enjoy it for a bit longer until I'm 100% comfortable affording the GTR, as I am with the Z.

Which brings me to my questions for the Boosted owners/builders/shops etc.

Realistically, what #'s should I expect with a single turbo or A2A SC kit? With looking at GTR's I'd like to be around 550-600whp.
The weak link would be the 7A trans I'm assuming from research, which leads me to my next question,

What's all needed to rebuild the 7A trans to handle 550-600? And costs associated? Any companies offer rebuild kits, solenoids, etc to beef it up?

I've looked at a few SC/Turbo kits,
Stillen with SOHO A2A upgrade w/ 9lb pulley upgrade (580whp/427tq)
SOHO Stage 1 (540whp/465TQ) for $7899 or
SOHO Stage 2 kit for $8999 with 570whp/498TQ

I'm looking to stay under 10k, The best bang for the buck would prob be a lightly used Stillen, + $1999 for A2A kit and then whatever parts needed for 7A to withstand around 550-600whp/420-500tq.

I want some first hand experience (before pulling the trigger) by builders or owners on costs associated with, how much power to realistically expect, etc. Any info is much appreciated.

I know a lot of people have already chimmed in but let me give some information to help you.

1. Power for Single turbo and superchargers can range wildly. Your main concern is going to be TQ.

2. There are several single turbo kits on the market. there are only a handful of supercharger kits. Single turbos will have massive TQ fairly early on. the Vortech or stillen based superchargers will only see tq peak later in the RPM range. The RJM whipple will see high torque as early as 2800rpm and peak around 5500rpm and then level off around the torque you saw at 2800 rpm. A very flat torque curve.

3. stock components can handle only so much TQ load. the motor is anywhere from 500-550ftlbs (This could see as high as 700whp +/-). the Transmission maxes out at ~420-450ftlbs. PLEASE NOTE: the longevity of these components is drastically reduced at these power levels. Failure is not a matter of if but rather when...

4. Transmission upgrades. I would steer clear of level 10. This is my personal opinion after seeing a fully built trans by them pulled apart. however, here are the parts I would do:

Triple Plate Tq Converter (Only RJM has this)
Billet Flex Plate (Fast Intentions / RJM uses this one)

Next would be a truly upgraded valvebody.

Then finally machined baskets to accept more steel and carbon plates. (Only RJM does This)

If your budget is $10k I would keep saving. Your better off having $15k+ in hand when you go to do this. Trust me... Something always comes up and your build stalls because your waiting on money... Happens to a lot of guys!

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