2.4 Turbo Selection

[i550]

Originally posted by v8klla@Feb 13 2004, 06:30 PM
Basically he suggested that on a 2.4 the exhaust housing in a hybrid such as the RS65 may be a little small. 

You need to decide if you want a fun car or a race car and be honest with yourself about it. If you want a race car then you should skip over everything and go right to a full T4 set-up.

I listened to people who were supposed to be "in the know" two different times and it wasn't anything more than an expensive pain in my ass. T4 was fast but I don't spend much time over 30psi on race gas. T3/T4 wasn't bad but it still wasn't what I was after.

Finally I went and made my own decision and bought the turbo everyone thinks might be too small. I went back to a 2g manifold and put a PTE SCM61 on it. This gave me the car I wanted.

The car's fun to drive, at 18psi on pump gas it has power instantly in any gear. I get to make the decision to use race gas and turn up the boost, it isn't a requirement and if I want to use it 30psi on race gas is still an option.

It does seem like 30psi is about the limit of this turbo on the big motor but I'm not trying to chase down Sheps times.

[v8klla]

Well I want it to be streetable, as in spools before 5000. Hopefully that won't be a problem with the 2.4 setup. I would like it to be efficient on pump gas though, as I am not as wealthy as say Sam Jacobson and cannot run race gas every day!

Like I said I want 10's, but don't want to have to upgrade the turbo again anytime soon...

Chris

BTW - What motor/supporting mods are you running? I see you are new here...Welcome!

[1ViciousGSX]

Basically the 2.4L will spool a turbo 800-1000rpm sooner than a 2.0L will. So just keep that in mind when looking at turbos which are ussually rated for 2.0L engines.

[Pushit2.0]

GT35R or bigger other wise you ARE WAISTING YOUR TIME with a 2.4.

~John

[At-Least-It's-An-Evo]

With a 2.4, get a turbo that you can handle or JUST BUY my 14b ;) , a AGP/HKS/Buschur T4 manifold, and call it close.

[Shane@DBPerformance]

A GT35R is pretty much a dual ball bearing version of a SC61. Even though the 2.4 will spool a turbo faster, you have to slightly offset potential RPMs that you are going to lose on the top end. The 2.0s rod ratio is pretty good and you can rev it quite high, most of the fast fast guys are running 2.0s and running high RPMs. The 2.4 rod ratio is quite poor, even the log rod versions are only slightly better. So you have to somewhat take that into consideration. For a lot of you that might not be a big deal, but I ran my ghetto half built 2.0l to 8500 almost daily and I would be scared to run a 2.4l out that far at all. Higher RPMs make for some nice long gears.

Guys are running 9s on turbo based on the wheel in the GT35R/SC61, etc. So it is quite capable. If you want it to spool fast then maybe just get a Mitsu version of it like the SCM61, if you want to make more power with it then get a T3 version of it and run a bigger exhaust side.

[niterydr]

9b