Ok, I decided to keep my 996tt but to mod it a bit further. Right now it has X50 with reflashed UMW tune and 1.0bar wastegate. I plan to add a Speedtech quiet exhaust soon.

Now I read numerous threads and it seems like the K24/18g is a great and relatively cheap upgrade for my car. This kit has been installed on many cars over the years and I'm looking for first hand users on their experience with the kit.

So, my goal is not to go too crazy, I live in a 91 octane fuel so I can't go over the top. My goal would be 600-625 crank hp. I planned on adding injectors and using EPL Tune based on the numerous good reviews but I'm open to suggestions, hoping this doesn't turn into a my tuner is better than your tuner.

So, how reliable should it be? Did anyone blew its engine with a similar set up?
How would the drivability be?
How fast, could a car like that break into the 10s (just out of curiosity as I don't plan on dragging the car)?
To those that did it, any regret doing doing it?
Anyone living in Quebec could give me a k24/18g ride?

 

Do it! It's totally reliable and perfectly drivable. IMO, there are no downsides...and they are a blast to drive...very cost effective for an X50 car, too!

With a 91 octane tune, I highly doubt you would see 10's in the 1/4. Generally you need better fuel and higher boost for 10's on 18G's.

 

My car has all bolt ons including meth with the k24/18g. The setup will have a little more lag than the factory setup but the top end will blow it away. My car to me is scary fast (2nd gear is hairy lol), anyone who gets in and I do a one gear pull say its the fastest car they have ever been in and some of my friends have been in some high powered Vet's. Overall its a great street setup. I would just go all bolt ons with the turbos so you get the proper support. All bolt ons with the 18gs and pump and meth and you are easily in the 10's.

 

I don't want to go with meth as I don't want to complicate things. I just want my car to be as fast as the new supercars but don't want to compromise on reliabilty engine safety or having to run race gas or meth.

The k24/18g is probably as fast, as reliable and as cheap as I can go. I kinda hoped 600-625crank hp would be enough to get into the high 10s where most supercars tend to be at the moment...

 

Nobody really races supercars on a drag strip/ 1/4 mile. Most racing is done from a roll, and that helps because our cars have such short gearing. An 18G car will hang with or beat most modern supercars if you encounter one on the highway.

However, there are people who have taken their 18G cars to the low 10's, and possibly even high 9's but not sure on that. USP motorsports in FL I believe has the 1/4 record for an 18G car.

 

Sorry to say but that short gearing ,especially in 1st, is bad for our modified cars ..That's why the hot ticket is to put the GT3 gear set in..
Raising the rev limit to 7500rpm helps that 1 to 2nd shift which I have and I also put bigger diameter tires on to help it act like a taller gear..
My 18g set-up is great but meth would put it in a new league..
I have been torn for awhile to go to 3071s but I only plan on running 93 pump gas...If I was to run Meth ,I would go right to 20 billets..

 

From where you are, it would be a mistake NOT to do the 18g. You will not be dissapointed. My car was unbelievably fast for a 18g car. Run the 18g's for a while and when you get bored, just add meth then...

 

You misunderstood my post... from a roll, you should already be in 2nd or 3rd gear, because the gears are so short. I don't bother racing mine in 1st at all, and rarely in 2nd.

 

It all makes sense. I don't drag the car but I used drag times to give me an idea of the performance. From a roll, in 2nd or 3rd, I guess the short gearing high torque and 600+hp should be good enough to at least keep up with pretty much anything I have a realistic chance of meeting on the street.

Also, from what I gather, a 24/18g is a pretty solid and reliable upgrade.

Just a quick question, does the 7500rpm rev limit something that's known to be safe or is it just extra rev room in order not to bounce on the rev limit in 1st (and 2nd)?

 

Some tuners feel it's safe,, you have to trust them. . Some have there own opinion on that.. LOL.
It made my car pull harder from 1st to 2nd and racing of on the Highway.

 

i think ams, ugr, topspeed , uspmotorsports, switzer, evoms would disagree with this statement
the main reason for roll racing is 2 fold. 1 the driver cant figure out how to launch the car to get the power to the ground and 2 it is easier on the driveline and less parts carnage

with only about a 3500 rpm powerband of most turbos going to 7500 isnt necessary unless the turbo is so large it spools crazy late and you need to high rpm to get the most out of it. with the k24/18 spooling at 3500 rpm 7000 rpm is plenty high enough. 7250 keeps it off the limiter unless your not paying attention

the usp car ran e85 and was about as modded as it got with stock internals.

 

I think since our gear ratio spreads are not that close ratio,,it leaves a lot for gear recovery between shifts,,,,so a higher rev limiter will keep it in nearer the HP power range after the higher shift...Its worked for me in my vehicles and bikes..

 

The shops do it for bragging rights, but most owners are not racing from a stop. There's a reason why 60-130 has kind of become the new performance metric.

All the really high power guys are racing the Texas Mile these days, or doing grudge matches where they go from a roll.

 

You already have the K24 turbos. I would absolutely do a 18G if I were you. When I bought my car it had a flash and K16 turbos. My first step was the 18G. It was magnificent. The car behaved just as it did before off boost but on boost it was an animal. I could not have been happier with it. Assuming you get a good tune, address the fuel required for a 18G and don't go crazy with the boost there is no downside.

 

The cars not fast if it can't put the power to the ground... Its powerful but not fast! A lot of people have dialed back on power and run faster.
I agree that roll racing is very popular now but plenty people still do dig runs where you have to be able to drive not just brave enough to stay in it or pedal it.