01-16-2012, 08:32 PM #1Supporting Vendor
- Join Date
- Feb 2010
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- 12 Post(s)
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Precision 6766 w/H Cover vs 6776 w/S Cover
As you know, Precision has discontinued the cast wheel in the 6776 which is the turbo that nearly every HPF stage 1, 2 and 2.5 customer has. We have used this turbo for a long time and until recently could not get another 67 series turbo from Precision that could outperform our current selection. That is until now.
On these dyno graphs, boost levels were matched at around 6.8psi on low boost and 12.5psi on high boost.
We later gave Gus a 16psi tune on the this turbo for pump+meth and for race fuel and an 8psi tune on pump in his stage 2. The customer directly requested the higher boost option. We added a bunch of cool new stuff to his car to support the increase power such as FIC injectors and the HPF / Walbro in tank pump. I'm having John temporarily turn it down to 13psi so I can publish the results that we are going to release all of our normal stage 1 and 2 kits at so he is dynoing the car again today.
92 Octane Pump - 7psi
92 Octane Pump + Methanol - 12.5psi
110 Octane Leaded Race Fuel - 12.5psi
110 Octane Leaded Race Fuel + Methanol - 12.5psi
8 PSI Low Boost, 16 PSI High Boost (SAE)
8 PSI Low Boost, 16 PSI High Boost (Uncorrected - What the car actually made!!)
I drove the car (which has a lot of weight taken out of it) at the highest power figure and it was absolutely amazing. I just love the powerband.
01-16-2012, 08:52 PM #2
That is not bad at all! Does that leave more room for more power in the end?
Was just wondering have you guys tried the Garret GTX turbo's at all?Burger Motorsports
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01-18-2012, 05:47 AM #3
Great data guys.
If I am reading this correctly the 6766 seems to be a bit better at lower boost levels?
01-18-2012, 09:59 AM #4
Awesome, thanks for sharing the data!
Do you guys happen to sell a twin-scroll T4 or V-band manifold for the S54?
01-19-2012, 05:02 AM #5
01-19-2012, 11:50 AM #6
01-19-2012, 10:41 PM #7
01-25-2012, 08:54 PM #8