:::RHMT::: Real Home Made Turbo

General Category => Forced Induction => Topic started by: TWOLOUDnPROUD on May 09, 2009, 05:30:10 PM

Title: Which Turbo to Use?
Post by: TWOLOUDnPROUD on May 09, 2009, 05:30:10 PM

I have two turbo's one is a T04B H-3 and the other is TO4B V-Trim so which one should i use? Here the maps for both turbo's tell me what you think.

T04B H-3

(https://realhomemadeturbo.com/forum/proxy.php?request=http%3A%2F%2Fi109.photobucket.com%2Falbums%2Fn80%2FTwoLoudNproud%2FLx-R%2FT04BH-3.jpg&hash=5de9483a2154f4e14f1ded997f9b0be3ec9bfbd1)

T04B V-Trim

(https://realhomemadeturbo.com/forum/proxy.php?request=http%3A%2F%2Fi109.photobucket.com%2Falbums%2Fn80%2FTwoLoudNproud%2FLx-R%2FT04B-V.jpg&hash=3a6de358a1552b01536efae92e6eb7a58365a142)

Title: Re: Which Turbo to Use?
Post by: dvst8r on May 09, 2009, 06:11:50 PM

I say they are so close, it will make very little difference.

Title: Re: Which Turbo to Use?
Post by: reddevil on May 09, 2009, 10:46:58 PM

Pictures please,

Title: Re: Which Turbo to Use?
Post by: TWOLOUDnPROUD on May 09, 2009, 11:00:03 PM

Quote from: reddevil on May 09, 2009, 10:46:58 PM

Pictures please,

They look the same the only difference is the T04B H-3 has a bigger compressor wheel Inducer2.298  Exducer2.750 and the T04B V-Trim is Inducer2.160  Exducer2.750


(https://realhomemadeturbo.com/forum/proxy.php?request=http%3A%2F%2Fi109.photobucket.com%2Falbums%2Fn80%2FTwoLoudNproud%2FLx-R%2FDSCN7684.jpg&hash=478ca6551721238fcef4091b8a4116669814a7e1)

Title: Re: Which Turbo to Use?
Post by: BoostForLife on May 09, 2009, 11:19:07 PM

I would use the H-3 if you're not going to push any more boost than 15psi. .138 of an inch isn't much difference, but at 15psi it should show some gain.

Title: Re: Which Turbo to Use?
Post by: TWOLOUDnPROUD on May 10, 2009, 03:41:17 AM

Quote from: BoostForLife on May 09, 2009, 11:19:07 PM

I would use the H-3 if you're not going to push any more boost than 15psi. .138 of an inch isn't much difference, but at 15psi it should show some gain.

I think i am going to use the V-Trim im doing a two stage boost control 8 psi low and 15 psi for high boost and the V-Trim maps looks good for that. The V-Trim flow rate is 48 lbs/min and the H-3 is 49 lbs/min not that much of a difference so i will use the V-Trim for now and try the H-3 later down the road.

Title: Re: Which Turbo to Use?
Post by: hotrex on May 10, 2009, 06:04:04 PM

i used a t04b s trim on my build d series and it made 259 at 15 psi  back in the day.

the v trim is the one id use

Title: Re: Which Turbo to Use?
Post by: Joseph Davis on May 10, 2009, 06:34:51 PM

Quote from: BoostForLife on May 09, 2009, 11:19:07 PM

I would use the H-3 if you're not going to push any more boost than 15psi. .138 of an inch isn't much difference, but at 15psi it should show some gain.

Uh, it's not .138 of an inch difference.  It's .48 in² difference, basically 12% bigger. 

Title: Re: Which Turbo to Use?
Post by: HiProfile on May 12, 2009, 11:29:00 AM

For power, H-trim. Otherwise the V-trim will get very close, but have a larger powerband. H-trims are less common for a reason.

FYI you guys also have to factor in speed - radians/sec is the same, but inches/sec is higher on the H-trim, given the same shaft speed.