best holset for autocross

[knochgoon24]

I'm aiming to prove that the HE351ve is the quickest spooling Holset with good top end, but that's a little more work that most want to undertake.

 

[ed1380]

Ive looked at the 351ve but its usually used as a drag turbo. If someone can show it spooling like a 16g I'd be all over that

 

[knochgoon24]

Working on it. I just need some more free time. Between work, classes, and 2 school clubs, I don't have a ton of extra time.

Aiming to get it on the first week of March, pending I can get the electronics all working by then. Results soon after that.

I currently have a small 16g, and I hope to be able to compare against that with some hard data.

 

[carvinbassplyr]

I'd probably just put a 68hta on it, or a EIII16g.

My vote goes for the HTA68...I'm currently running a 14B with a 7cm turbine housing but once that isn't enough I'll be putting on the HTA68. IMO it's the best compromise for respectable hp numbers, fun daily driving and auto-x. It's got the spool of a small 16G (barely slower than a 14B) with a flow rate of 47 lb/min! (pretty close to the 50's mark that holsets do with the bep housing). that gives you plenty to work with and will still have good top-end on a 2.0L (unlike a TD05H 20G) Just my .02.

 

[DSMsOwnYourV8]

Well I listened. Real E316g for $200. Has some thrust play but the seals are still good

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Supposed to get the rest of the car tomorrow if he calls back. 98 gsx auto missing a longblock.

Solid choice. A lot of Evo's do autocross and don't even upgrade their turbo's in doing so... Should tell you a lot right there.

 

[JusMX141]

A lot of Evo's do autocross and don't even upgrade their turbo's in doing so... Should tell you a lot right there.

Even though the compressor and turbine wheels are the same spec, the Evo VIII and IX 16G's are a completely different animal concerning spool and peak airflow due to a more-efficient twin-scroll turbine housing design.

The Evo III 16G is still an awesome choice for a quick-spooling 40-42 lb/min turbo. Depending what boost level you're running, perhaps I'd try using a 14B's 6cm turbine housing in order to gain some response. If the boost is low enough, once the wastegate is open you're going to be dumping the majority of the exhaust flow anyway- so any added restriction the smaller housing provides would never be noticed. Different story if you're at 20psi and above, however.

 

[DSMsOwnYourV8]

Even though the compressor and turbine wheels are the same spec, the Evo VIII and IX 16G's are a completely different animal concerning spool and peak airflow due to a more-efficient twin-scroll turbine housing design.

The Evo III 16G is still an awesome choice for a quick-spooling 40-42 lb/min turbo. Depending what boost level you're running, perhaps I'd try using a 14B's 6cm turbine housing in order to gain some response. If the boost is low enough, once the wastegate is open you're going to be dumping the majority of the exhaust flow anyway- so any added restriction the smaller housing provides would never be noticed. Different story if you're at 20psi and above, however.

Very true. I'd definitely do something like that and have everything ported as well. A small 16G wouldn't be a bad idea either. My buddy and I used to race while he was running a small 16g and I had an EVO 3 16g. We both had ported manifolds, turbos, etc, and he would definitely spool on me from the gate before I eventually chased him down.

I could imagine that his car would've definitely been much better than mine in autocross as they were setup.

 

[snowborder714]

A small 16g is what I'm currently on and is a great autox turbo. Power comes on fairly early and still pulls hard through most of the RPM range.

 

[DSMsOwnYourV8]

A small 16g is what I'm currently on and is a great autox turbo. Power comes on fairly early and still pulls hard through most of the RPM range.

I could imagine it would be pretty good for autocross. Fast spool and probably all the power you would need for the course.