Who is making over 450whp on the stock block?
What are you dyno'in? with what kit, and who did your tune?

I'm debating buying a Z again and I'd like to know where the limit of the motor are right now with good tuning.

Thanks

 

Some guy has over 550 rwhp on his stock block on this forum. I don't know what he is doing though.

 

bigbri, he's running an aps tt w/ water/meth injection amongst other things...

The vast majority of the 450+ whp stock block setups utilize the one of the tt setups. There are a handful (1 or 2) vortech guys past the 450 mark, and I have seen a few claims for some st's being past that point, but nothing substantiated yet...

 

from what ive seen, there really is no safe limit for the block once u go f/i. some will say 450, others 350. no matter what your power output it seems like there is a possibility for failure. obviously the higher your power the more likely it is.

the best advice anyone could give u is, be prepared to rebuild the engine if u go fi. so long as u already have the $$$ in the bank for it, its not going to surprise u as much. nothing hurts me more than seeing some poor guy blow his motor and have to sell his car cuz he cant afford to fix it.

my 0.02

 

Basically I'd like to see 450-500whp on the stock block.
Otherwise I'm gonna consider getting a used 03/04 Cobra instead of a Z.
So I would like to know if it's possible with liek a Greddy or APS Twin kit and the right tuning.

 

Exactly what he said, I have almost 22k on a stock block with 440whp or higher. So who knows what the limit is. I wish someone could find the culprit.

 

Sure it's possible. BigBri has 550 rwhp on the stock block.

Respect
JET

 

22k with the kit on, or total mileage on the car?

 

I have 516xx miles on the car and almost 22k miles since the kit went on.

 

Wow thats great Bart-big power and you've had it for a long time. Who tuned your car?

 

Even if you have to spend the money on a built block it is still better than a Cobra. I bought mine with a Greddy and the engine blew, so I parked it for almost a year and a half until I could do the engine right. I did and then I got in an accident. Needless to say now VRT is building my car and it will be a monster!! A Z you love is better than any other car. Sooooo much potential. Get the Z and wait until you can build it right. It is worth it, that is why I ended up with another.

 

Seems like everyone already knows....550whp for me......

 

ZcarGarage tuned mine, they are in San Jose. I've had 2 tunes. Well, technically 3 tunes. They gave me my car back with cats, apsTT and cams and it made 410whp/414wtrq, then they retuned it for Testpipes and 8.5 psi and i had 440whp/410wtrq in Jan. 05, then in Sept. 05 i started getting boost spikes to 11psi so i had them check out my tune and they were gonna test the APS tallboy for me. They put it on the dyno and it turned 488whp/450wtrq so they tuned it for 9.5psi and now it makes 462whp/445wtrq. When my motor finally gets here I will retune for 10.5psi and run the Motordyne plenum spacer and APS 3.5" downpipes and see what happens. I think she has about 50whp more left in her before i start getting into any problems.

Im debating tho, because I really need the 3.3 Final Drive and will need tires in about 2-5k miles depending on how the weather is. So, I may just wait for all that.

 

Dude, your known around the whole country. When someone hears 550 they say "What about Brian".

 

Yeah i was at 345rwhp for about 15k miles, then for the past 6k miles been at 424rwhp, and no problems. I have 28k on the car, 21k of which are FI

 

Maybe I should create the 20,000+Mile FI Club, then we could assemble. hahah

 

What size injectors are you running?

Respect
JET

 

haha sounds good to me

I'm running the RC440's that come with the Greddy kit.