Turbo help

[Boost Trigger]

Hey everyone I'm not a DSM guy, I'm actually a TD (Turbo Dodge) guy but I know you guys have a lot of knowledge in turbos so I figured I'd ask y'all some questions about them. First of all, I am rebuilding my engine and I'm looking for a new turbo, I am considering the Garrett GTX3582R, the Holset HX35, and the Holset HX40 but none are exactly what I want. I have a 2.5L 8V I4 and I'm looking to get 350- 400whp. I'm looking for a twin scroll, water cooled, external wastegate turbo for a decent price that can provide me with the kind of power I want. Any suggestions for turbos or any info at all would be greatly appreciated. Thanks.

 

[Archer Fabrications]

Sounds like it flows more then a dsm. Key word *sounds* our intake valves are 34mm and exhaust 30.5mm

 

[JusMX141]

Reference post #1.....he only has eight of them; we have sixteen.

 

[Boost Trigger]

I believe yours flows 300CFM.

I should specify, I believe yours COULD flow 300. I think it's more like 230 stock.

 

[Archer Fabrications]

Meh, even at 8 valves it seems pretty close.

 

[Boost Trigger]

Here are the flow numbers for your head: EVO X head flow numbers - evolutionm.net

My stock head only flowed about 120CFM

 

[JusMX141]

Here are the flow numbers for your head: EVO X head flow numbers - evolutionm.net

There are two different heads on our cars- the 1G (large intake port) and the 2G (small intake port)....neither of which are used on an Evo X's 4B11.

 

[Boost Trigger]

Oh, sorry. I thought since they were both 4g63s they would use the same head.

 

[Archer Fabrications]

The evo 10 does not have a 4g63, it has a 4b11, the only evo that shared the dsm head is the 1-4 i believe, not even positive about the 4 because it might have the same head design as the 6-9 which are 4g63 but completely reversed . Ahh so many flavors of 4g63 it makes me warm and fuzzy inside.

 

[Boost Trigger]

the second list of numbers was fora stock evo 8 head. The evo 8 has a 4g63, but apparently not your head . sorry. Thanks for the info though, I'll have to keep that in mind for future reference.

 

[Diamond Star Werks]

Evo 4-9 is reversed. Port design didn't really change much from 1-9 though
And 1-3 had the 2g head.

 

[LandSpeed-DSM]

The cylinder head/cam makes all the difference in the world.

8 valve 2.5L at 78% VE is moving roughly the same air volume as a 16 valve 2.0 @ 93%

Numbers are for demonstration, but still ball park realistic.

 

[Archer Fabrications]

That being said, hx40

 

[Boost Trigger]

:: I'll give the HX40 a shot and if it's over powered I'll get a HX35. My friend is making me a custom equal length, twin-scroll header for it. Thanks everyone.

BTW here are the official flow numbers for my head.

.200 lift: int. 123.2 Exh. 97.1

.300 lift: int. 179.2 Exh. 127.3

.400 lift: int. 213.4 Exh. 144.9

.450 lift: int. 223.2 Exh. 151.8

.500 lift: int. 224.9 Exh. 157.4