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Old 12-15-10, 10:56   #1 (permalink)

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Lightbulb HX35 debate...

Alright so I was planning on buying a T3/T04E 50 trim with a stage 3 wheel and .63a/r.
...but...I recently got an hx35w fo a good deal.
I've looked at maps for both and and I know the holset is bigger and it seems that most of the turbo debates that take place on here focus on bigger is better (within reason of course) with the logic that the f2t is so inefficient, that once the efficiency of the engine drops, the efficiency of the huge ass turbo will start to show its wings and all is good in giant turbo land.

That does sorta make sense to me I guess. I do have a lot of experience with turbos and that kinda contradicts most of what I know. From what I understand, to get the most out of an engine, as far as reliability, efficiency, minimal boost lag with max power available, you need to match the two.

I do admit the f2t is new stomping ground to me and the only turbo jap engine I've had that had comparable torq was the ka24, others being a 4g63 and sr20. I do not know from experience with this motor if I should sell the holset and buy the garrett, or keep the holset.

Now I also know a lot of people share the opinion (or fact, whichever the case may be) that holsets are way more reliable since most of the garretts are made in sweatshops now. This is not really my concern so try to keep this out of the debate.

My main questions are regarding lag, efficiency, driveability (not going from 2psi to 25 psi in a matter of 250rpm) and whether or not the divided inlet on the hx35 will be an issue without a divided manifold. I'm shooting for 350crank on 20-25 psi (high boost) probably 15-20 (low boost)

opinions?? preferably experience related
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Old 12-15-10, 12:12   #2 (permalink)
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heres my hy35 at 20 psi at high altitude. i later found out i had a gash in the charge pipe. so it lagged and was a lot less efficient

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Old 12-15-10, 12:33   #3 (permalink)

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from what I've gathered from your video it seems you had boost around 3500-3750ish...is this accurate??
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Old 12-15-10, 13:26   #4 (permalink)
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i think it did when i first had the setup going. in that vid prob closer to 4K. i imagine the hx35 with a slightly bigger ex housing will hit around 4Kish. thats plenty early enough imo

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Old 12-15-10, 18:03   #5 (permalink)
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Quote:
Originally Posted by dubgtr View Post
Alright so I was planning on buying a T3/T04E 50 trim with a stage 3 wheel and .63a/r.
...but...I recently got an hx35w fo a good deal.
I've looked at maps for both and and I know the holset is bigger and it seems that most of the turbo debates that take place on here focus on bigger is better (within reason of course) with the logic that the f2t is so inefficient, that once the efficiency of the engine drops, the efficiency of the huge ass turbo will start to show its wings and all is good in giant turbo land.

That does sorta make sense to me I guess. I do have a lot of experience with turbos and that kinda contradicts most of what I know. From what I understand, to get the most out of an engine, as far as reliability, efficiency, minimal boost lag with max power available, you need to match the two.

I do admit the f2t is new stomping ground to me and the only turbo jap engine I've had that had comparable torq was the ka24, others being a 4g63 and sr20. I do not know from experience with this motor if I should sell the holset and buy the garrett, or keep the holset.

Now I also know a lot of people share the opinion (or fact, whichever the case may be) that holsets are way more reliable since most of the garretts are made in sweatshops now. This is not really my concern so try to keep this out of the debate.

My main questions are regarding lag, efficiency, driveability (not going from 2psi to 25 psi in a matter of 250rpm) and whether or not the divided inlet on the hx35 will be an issue without a divided manifold. I'm shooting for 350crank on 20-25 psi (high boost) probably 15-20 (low boost)

opinions?? preferably experience related
well my opinion, i have own a 50trim t3/t4 and a holset hx 40 amd holset hx35.
1st i have 2 different 50 trim turbo.
turbonetic big shaft 50 trim with stage 3 .63a/r exhaust wheel that dyno 263whp at 16psi with slight exhaust leak from wastegate.

precision small shaft 50trim with stage 2 exhaust wheel and .48a/r exhaust housing. dyno 273whp at 17psi

really i preffered the stage 3 exhaust wheel since the top end is a big different on f2.

hx40 turbo was in my mx6gt for a while running 20+ psi but never got dyno. i sold it to a local civic guy.

hx35 is currently in my red probe gt at 24+psi with over 370whp..
The things about the holset is they love boost, they felt great at over 22psi. the more boost you run, the better the turbo seems to make boost faster. I love the holset turbo, and also love the 50 trim turbo.
If you looking to run lower than 20psi, get a 50 or 60 trim. if you looking to run more boost,get holset. or gt35r or 6262 turbo

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Old 12-15-10, 19:39   #6 (permalink)

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Originally Posted by ademan View Post
well my opinion, i have own a 50trim t3/t4 and a holset hx 40 amd holset hx35.
1st i have 2 different 50 trim turbo.
turbonetic big shaft 50 trim with stage 3 .63a/r exhaust wheel that dyno 263whp at 16psi with slight exhaust leak from wastegate.

precision small shaft 50trim with stage 2 exhaust wheel and .48a/r exhaust housing. dyno 273whp at 17psi

really i preffered the stage 3 exhaust wheel since the top end is a big different on f2.

hx40 turbo was in my mx6gt for a while running 20+ psi but never got dyno. i sold it to a local civic guy.

hx35 is currently in my red probe gt at 24+psi with over 370whp..
The things about the holset is they love boost, they felt great at over 22psi. the more boost you run, the better the turbo seems to make boost faster. I love the holset turbo, and also love the 50 trim turbo.
If you looking to run lower than 20psi, get a 50 or 60 trim. if you looking to run more boost,get holset. or gt35r or 6262 turbo
That really helps. I wonder what dyno numbers the stage 3 50 trim would have put up at 20 or 25 psi.

Also, are you using a stock mani with a t3 flange welded on in the red probe? And does your hx35 have the divided inlet exhaust housing?
I was thinking about getting the advanced kit from jgs simply because of how cheap it is. If I [fizzle] it up then its not that much of a loss.
stg. 1.4 THK
I don't think I'm experienced enough with building manifolds to try and build a divided manifold. I would mainly be trying to make a manifold that sits a little higher than a stocker, with a nice collector, and a wastegate flange.
I want to stay away from that log setup they offer cuz it looks like [shizzle].
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Old 12-15-10, 20:39   #7 (permalink)
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Originally Posted by dubgtr View Post
That really helps. I wonder what dyno numbers the stage 3 50 trim would have put up at 20 or 25 psi.

Also, are you using a stock mani with a t3 flange welded on in the red probe? And does your hx35 have the divided inlet exhaust housing?
I was thinking about getting the advanced kit from jgs simply because of how cheap it is. If I [fizzle] it up then its not that much of a loss.
stg. 1.4 THK
I don't think I'm experienced enough with building manifolds to try and build a divided manifold. I would mainly be trying to make a manifold that sits a little higher than a stocker, with a nice collector, and a wastegate flange.
I want to stay away from that log setup they offer cuz it looks like [shizzle].
i will love to too, all my car uses a stock manifold with t3 flanges welded on it. and my hx35 has a single inlet. They are pretty simple setup and pretty efficient.

even my old project primer can get 21psi at around 3400-3700 rpm, depending on gear on a t3/t4 h trim, which is a little bigger and more efficient than 50 trim about the same size as 60-1. (inducer is actually bigger than 60-1 wheel)


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Old 12-15-10, 20:50   #8 (permalink)

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Originally Posted by ademan View Post
i will love to too, all my car uses a stock manifold with t3 flanges welded on it. and my hx35 has a single inlet. They are pretty simple setup and pretty efficient.
Did you get a different exhaust housing or did you get it like that??

I've read some things on other forums about people just boring out the divided exhaust housing saying that "it raises the a/r" but I don't believe that plus it seems sketchy to me.
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Old 12-15-10, 21:04   #9 (permalink)
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Quote:
Originally Posted by dubgtr View Post
That really helps. I wonder what dyno numbers the stage 3 50 trim would have put up at 20 or 25 psi.

Also, are you using a stock mani with a t3 flange welded on in the red probe? And does your hx35 have the divided inlet exhaust housing?
I was thinking about getting the advanced kit from jgs simply because of how cheap it is. If I [fizzle] it up then its not that much of a loss.
stg. 1.4 THK
I don't think I'm experienced enough with building manifolds to try and build a divided manifold. I would mainly be trying to make a manifold that sits a little higher than a stocker, with a nice collector, and a wastegate flange.
I want to stay away from that log setup they offer cuz it looks like [shizzle].

MX6gtboi and AMD both put up 325+ whp on 50trims.

As for "boring out" the divided housing on the HX35, that doesn't alter a/r at all. Those people are confused.

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Old 12-15-10, 21:16   #10 (permalink)

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MX6gtboi and AMD both put up 325+ whp on 50trims.

As for "boring out" the divided housing on the HX35, that doesn't alter a/r at all. Those people are confused.
Yea I bought a trans from AMD like last month and was talking to him for a while about it when I picked it up, nice guy. He said he blew the thing runnin more than 30 psi and put a gt35r on there.

Yea like I said that whole boring out thing increasing the a/r I don't believe. From what I understood the only way to change a/r is by changing the exhaust housing. I wonder though whether I should bore out the exhaust inlet or not even bother. I think in terms of turbulence, the amount produced by using a non-divided manifold with a divided inlet turbo would be moot overall. If anything maybe I'd just knifedge the top part??
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Old 12-23-10, 10:09   #11 (permalink)
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Quote:
Originally Posted by dubgtr
I've read some things on other forums about people just boring out the divided exhaust housing saying that "it raises the a/r"
Wow. Idiots.
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Old 1-21-11, 14:14   #12 (permalink)
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I would also vote for the HX-35. Very fast spooling for a turbo that size. They spool just as fast as a 50 trim but make more power. They are huge in the DSM world right now. People are making 350-500HP with them. I myself will be getting one in the future.

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Old 1-21-11, 18:25   #13 (permalink)
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I would also vote for the HX-35. Very fast spooling for a turbo that size. They spool just as fast as a 50 trim but make more power. They are huge in the DSM world right now. People are making 350-500HP with them. I myself will be getting one in the future.
hx35 is always been known to spool fast,

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Old 1-29-11, 7:08   #14 (permalink)
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nice smoke show at the end there ademan. :P

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Old 1-29-11, 7:29   #15 (permalink)
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nice smoke show at the end there ademan. :P
yes it is, the top coolant hose came off and splashes coolant everywhere. stick it back in and it fine

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