Another "guess the dyno" thread

millhouse

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#1

• Nov 12, 2007

• #1

Another "guess the dyno" thread UPDATED WITH VID'S

I'll finally be getting a few runs on the dyno done before the seasons up. I've got a feeling my turbo exhaust housings are limiting my total horsepower by choking in the higher rpm…so I'll be cautiously optimistic.

Anyways, the combo and 1/4 times are in the sig…and the boost is going to be right at 8psi.

Take your best shot!

 

iLkYsPoNy

if she's a tranny then... well I'd do her.... it..

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#2

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54

 

Wallzy

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31

 

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92GreenGT

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Millhouse whats the elevation of the track you run at and about how much does your car weigh? This is a good time to try out one of those online calculators.

 

woodyy24

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millhouse

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92GreenGT said:

Millhouse whats the elevation of the track you run at and about how much does your car weigh? This is a good time to try out one of those online calculators.

Click to expand...

Elevation is around 800ft, temps were low 80's and the car weight with me in it is probably around 3200lbs.

 

B

bentley429

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• Nov 12, 2007

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450-500

 

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92GreenGT

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millhouse said:

Elevation is around 800ft, temps were low 80's and the car weight with me in it is probably around 3200lbs.

Click to expand...

Ok, im going to roll with this calculator then.

464 hp

Doesnt say torque but I will guess 539 trq.

When will you be dynoing?

 

millhouse

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92GreenGT said:

Ok, im going to roll with this calculator then.

464 hp

Doesnt say torque but I will guess 539 trq.

When will you be dynoing?

Click to expand...

Tomorrow...although I have to wait until I get a firewire cable in order to post the vids. I'm hoping to lay down mid-low 400's with a nice fat torque curve. The whole reason for getting the dyno is not only to simply see what numbers I put down, but to find the difference between the turbocoupe .48 (current) and .63 AR housings for the DIY turbo community.

 

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92GreenGT

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Nice, it'll be interesting to see how much of a top end difference there is.

Good luck!

 

LaserSVT

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4783.2 hp at the crank after compensating for driveline loss of 1000%

 

bloopbloob

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i'm going to guess 457hp to the wheels.


i'm also surprised i haven't seen mike myers saying 1 million HP!!! yet!!!. i'm kinda disappointed!

 

ninety15.0

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Yea i would say about 440 and 520.

 

millhouse

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92GreenGT said:

Ok, im going to roll with this calculator then.

464 hp

Doesnt say torque but I will guess 539 trq.

When will you be dynoing?

Click to expand...

Ding ding ding....we have a winner!

So here is how it went (I'll post vid's and graphs in the next day or two)....

The first run with tune right off the street came out to be 468.84hp@5000 rpm with the torque I believe in the 440 range. My tune was a bit off with both fuel and spark and the guys at VT engines were VERY helpfull!

After several tuning runs in which I adjusted the fuel quite a bit, along with bumping the timing up 4* across the board I ended up with 489hp@5000 rpm and 527lbs torque @ ~ 4500rpm.

The torque curve as expected is very broad, and I was eperiencing some odd spark breakup past 5200rpm. The graphs cut off at 5400 rpm even though I pulled past 6k. In the end though, as expected the small housings sputter out past 5k RPM even though the cam wants to keep on pulling to 6k.

 

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92GreenGT

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Very nice Millhouse, thats great results. Now you can go to the track and expect to go mid to high 120's. Once you get it to bite again youll have an animal of a car!

 

millhouse

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92GreenGT said:

Very nice Millhouse, thats great results. Now you can go to the track and expect to go mid to high 120's. Once you get it to bite again youll have an animal of a car!

Click to expand...

I hear ya...and it probably didn't help that I was shifting at 6000 rpm when the turbo's just don't have it in them.

 

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92GreenGT

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I see you said it made peak power at 5000rpms, how fast did the power fall off after that?

 

millhouse

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92GreenGT said:

I see you said it made peak power at 5000rpms, how fast did the power fall off after that?

Click to expand...

Peak power was from 5000-5100 rpm and it drops off immediately afterwards. Around 5300 rpm is where I start getting spark blowout and the rpm signal drops from the dyno. It's not of much consequence though, as there doesn't seem a need to rev past 5400-5500 rpm.

 

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92GreenGT

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Nope, that will help keep your block alive as well. At least thats the going thing to say

 

millhouse

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92GreenGT said:

Nope, that will help keep your block alive as well. At least thats the going thing to say

Click to expand...

I hear ya! Which brings me to another issue...bigger exhuast housings to match the f-cam and allow me to rev to 6k rpm, or a smaller cam to match my current exhaust housings? Decisions decisions!