rb25det vs. 4g63

[intelligence27]

Hey guys, my friends getting a rb25det dropped into his 96 240sx and i wanna be able to kill him atleast on the straight aways. is there a possibility for me to do that and if there is what can i do. btw... i own a 97 GS-t

[turbo2nr]

yes you can beat him what mods do you have and what mods will he have?
i believe a stock rb25det in a 240 will pull mid 13's with mods low 13 high 12's easily, im assuming you know the limits and capabilities of the 4663 with little mods and upgraded turbo you can see near 400hp.
good luck
1

[89Turbo944]

Stock for stock he will beat you.

[intelligence27]

Well so far im stocked in my car but im lookin to start raising the psi on my turbo with a BOV exhaust intake then getting a boost controller but im not sure if thats ganna be enough.... what do u guys think?

[FourG63 97GST]

at that rate, you have no chance again

example: I know someone with a SR20det S13
mods: fmic,fuel pump,stock turbo,afc. 1/4 Time:13.5@103

now imagine what the RB25det can do
so start saving $$

[intelligence27]

Ok then what do i need to start whoopin ass? Turbo up grade, NOs...? Help Please

[Afrokid]

depends on how much u wanna kick his ass? if u looking to really kick him in the toosh get a 20g turbo from Slowboys for about 1,000. next get a k&n 9" filter and replace the intake with a new one [brand doesn't matter aslong as it has k&n filter]. u can also try new cams and pulleys. im sure people will give u more suggestions later.

[turbo2nr]

the rb25 isht all its cracked up 2 be
not in the 240
the traction sucks alot of hp little hp i think if he has the supporin mods (exhasut,intake,i\c boc, pips,fule and air managment) and the eclipse has the same thing with a big turbo the i think the dsm might win.
rember its just a motor it doesnt have mystical powers. the 4g63 is very capable of winning with lots of tuning.
good luck
1

[89Turbo944]

The 20G is a little big for a GS-T. That would be a little bit to much lag for a FWD to handle. I would go with a G18 or smaller.

With the lag you will have to play catch up with the 240.

I think you need to start of by doing a complete service on the car. And doing a wack load of research before you go and throw mods at the car. But if you are really set on beating him just go and get a 75shot of nitrous and go that way, less hastle on your side and you can beat him for sure.

[kjewer1]

Actually, people look for laggy turbos in FWDs. You get less wheelspin. When a small turbo like a 14b/16g spools up fast it hits the tires hard and breaks them loose. A local guy had a a turbo that was siginificantly larger than a 20g on a 1g FWD talon and did quite well with it

[89Turbo944]

I supose that is true, but due to that fact you could end up losing anyway. But if it were me i would stick to a 18G just because it offeres a little less lag and you can make good numbers with them.

But could you not also do modifications to the suspension, and driveline to alow a smaller turbo to work to your advantage. If the car was set up properly you could get good traction out of a smaller turbo set up.

Just my thinking anyway.

[kjewer1]

18g is known to be shyte on dSMs. For whatever reasons, the 16Gs usually do better. That being said, the lag will not be an issue since after each gear shift you are well into boosting range for turbo even larger than 20g. I didnt find that lag really slowed me down until my latest turbo, a TDO6H with GT30/40 hybrid compressor wheel. Spools at 4400 rpm, and takes some time to recover after shifts. But this is a rare case, no one else on this forum as far as I know is running a turbo this large. As far as I'm concerned, and in my experience, a 20g does not lag enough to make even worth the time it takes to type the word lag. Its not an issue, unless you like to floor it at 1200 rpm.

[JoeWagon]

You don't exactly need full boost on a GST in first gear, like GSXracer said. Plus, you won't be faster with a smaller turbo in any case. You wouldnt downgrade turbos to be faster because of lag. I think GSXracer and LandoAWD are the only two 20g users that I know on AF.

[89Turbo944]

Im currently contimplating a 20G or bigger. But i dont know whos turbo i should go with.

Any ideas?

[kjewer1]

Be glad to help. What car, I'm assuming DSM, and what are the goals for the car. HP, ET/MPH, etc. The turbo is the ultimate factor in what the car will be capable of, so its best to size it to your goals, then ask your self if it will work in your budget, is this a daily driver, etc.