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-   -   Spool Study between the VF46 and VF52 (http://legacygt.com/forums/showthread.php?t=198675)

BrenTuning 12-26-2012 05:08 PM

Spool Study between the VF46 and VF52
 
We dyno tuned (2) Legacy GT's the same day last year. They had nearly IDENTICAL mods except for one thing (turbo and headers) Both ran the same peak boost and used the exact same ramp rate for spool up which is locked in shootout mode.

The higher graph represents a tuned VF52 car, with Racer X FMIC/intake and stock headers, stock fuel.

The lower graph represents a tuned VF46 car, with Racer X FMIC/intake, stock fuel and unwrapped tubular headers.

A tad too close for a additional consistent 35whp and 48wtq?

Let the results speak for themselves:

http://i769.photobucket.com/albums/x...8vsvf40car.jpg

Bonafide P 12-26-2012 05:12 PM

Wow.

LosAngelesLGT 12-26-2012 05:19 PM

Just goes to show, numbers don't mean crap, its all about the powerband.

Happy Holiday! Good to have you with us btw.

fahr_side 12-26-2012 06:19 PM

Quote:

Originally Posted by BrenTuning (Post 4219810)
Both ran the same peak boost and used the exact same ramp rate for spool up which is locked in shootout mode.

Does that mean the VF-46 would have spooled faster if ramp rate were not locked? Humor me, I'm just not familiar with 'shootout mode'. Thanks.

BrenTuning 12-27-2012 10:29 AM

Quote:

Originally Posted by fahr_side (Post 4219877)
Does that mean the VF-46 would have spooled faster if ramp rate were not locked? Humor me, I'm just not familiar with 'shootout mode'. Thanks.


Ramp rate is how the load is being applied to the vehicle. Shootout mode puts this into a fixed rate as to not skew the results between different vehicles. In "regular" mode the operator can change this setting manually.

BrenTuning 02-25-2013 10:51 AM

Here's another we just did last week. Baseline is our Stage2 stock tmic tune. Owner's VF40 died out (150k+ mile car). All he did was replace the VF40 with a VF52. There's more in it with the addition of a upgraded intercooler. The stock BPV was leaking pretty bad as well.

200rpm Spool difference between turbos

http://i152.photobucket.com/albums/s...ps7e694b55.jpg

Mootsfox 03-09-2014 10:48 PM

I'm in the same state right now as your customer (150k+ on the stock failing VF40, Stage II everything else).

I think you just sold me on a new VF52 :D

BrenTuning 03-10-2014 08:32 AM

You're welcome, and enjoy!

fstaslp 03-10-2014 11:26 AM

That is on stock fueling? Looks like a nice upgrade until I can get a pump and injectors for corn juice!

BrenTuning 03-10-2014 12:29 PM

Stock fuel on all the cars listed in here.


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