turbo for me.

[Aproductions]

So I need a turbo...I want to get a holset h1c but do not have much info on it other than it is like a 50 trim.

anyways I am still old school with a stock 2g maf...So i am trying to find out if I get a h1c, will I run into maf overload or something at like 20psi?

Like is there anyway to tell what it will flow at what psi?

 

[RadDsm]

You aren't going to overrun a 2g maf at 20psi on an H1C.

 

[GsXdSmKingGsX]

What makes you think you would overload it??

 

[Aproductions]

I heard the h1c flows like real close to 50lb/min and the 2g maf can only read about that much I thought.

and this brings me to my next point....I also heard that it doesn't get into it's efficiency range until 25lbs, so if I run less than that how much do you think I would flow.

I just do not want to get this turbo if it will only flow as much as a smaller turbo plus added lag because I won't be in its efficient range.

 

[JusMX141]

There is not much you'll really enjoy at 20psi aside from a 16G, 20G, possibly a 68HTA. Even a 50-trim Garrett is not super-efficient at that level.

We ran a standard TD05H 20G and a Frank Level 5 20G back-to-back at the same boost level on my buddy's 2G TSi AWD a few years back...around 22-23psi. The car was much laggier and harder to keep in the boost with the Frank 5, and if it wasn't driven correctly at the track the car was actually much slower. The end result was that when it was driven correctly, the Frank 5 yielded a pass that was only about 3/10ths faster yet almost 5 mph faster than the standard 20G at the same boost level with nearly the same 60ft time.

Bigger turbos are not as efficient at lower boost levels, that's no secret. They're also laggier and harder to keep in boost between shifts, so you'll want to be on your game if you're competing. The one benefit of the H1C / HX35 is that is spools relatively quick for it's size and airflow capability, so it allows the user to buy a 52-53lb/min turbo with hopes of maxing it out with later modification.


The Holset H1C uses the same compressor wheel and turbine wheel as the 8-blade HX35, which we now know is capable of over 500whp.

 

[Aproductions]

yeah but heres the thing, I am using 9:1 pistons but if I can get up in to 25lbs then I will. so I don't know what to do.

 

[donniekak]

yeah but heres the thing, I am using 9:1 pistons but if I can get up in to 25lbs then I will. so I don't know what to do.

If you have timing control, tuning 9:1 for 25 psi is totally possible.

 

[standard235]

E85+9:1=

 

[Aproductions]

no I can't do e85 because it isn't that local.

anyways so with 9:1 pistons and 94 octane plus a aem meth kit, I should be able to easily do 25lbs and therefore flow pretty much...almost 50lb/min?

I am tuning with ecuflash and evoscan.

 

[50trimgst]

I have a Garret 50 trim with a 16g style mitsu exhaust side and its awesome turbo but i know im going to hx35 soon to and there awesome turbos and very well built. also from what hear the holset turbos are very cheap and easy to rebuild and thats what selling me on the holset turbos. also it is true after 25psi the holset hx35 realy does come alive. i have seen a stock engine on 30 psi from a h1c and its a great ride. tho everyone i know runs ecm link with gm mas and there all happy with there turbos.