FP Black Q16 635hp/640tq

[Nomad4g63]

Originally Posted by ForcedPerformance

BenJ, sorry for the annoying reposting whomever is responsible for multiple postings of this vid should be shot at once! hee hee!

I was unaware of other posts of this video, this is actually the right section to post this video in b/c it is the dyno/results section and no one else posted it

[9sec9]

Here's a link to the 40 psi video:
http://s43.photobucket.com/albums/e3...P1020012-1.flv

[ForcedPerformance]

"What boost is the dyno run"

It starts at 42psi and slopes down to 35psi, it is basically the 138-140krpm speed line on the compressor map. We bring it up to it's max RPM and just let it sit there, and whatever air runs thru the motor is what we get. So if you are looking at a compressor map, the operating line would basically look like that high speed line on the map when you run it this way. Actual mass flow gets up to about 68-69lb/min during this pull. My motor gets to 69lb/min at a much lower RPM than most others since it is a larger engine and has very huge camshafts.

[BLKCarbonEVO]

Robert, I have a HKS 272/280 combo and I was wondering how these cams would perform in my car, 5Rs? Would I have valve clearance issues? I also got your email and I'll holla at you tomorrow at work. I need to order a few things from you!

Mikey

[tscompusa]

Originally Posted by ForcedPerformance

"What boost is the dyno run"

It starts at 42psi and slopes down to 35psi, it is basically the 138-140krpm speed line on the compressor map. We bring it up to it's max RPM and just let it sit there, and whatever air runs thru the motor is what we get. So if you are looking at a compressor map, the operating line would basically look like that high speed line on the map when you run it this way. Actual mass flow gets up to about 68-69lb/min during this pull. My motor gets to 69lb/min at a much lower RPM than most others since it is a larger engine and has very huge camshafts.

damn thats a LOT of airflow considering this is a direct bolt on turbo for our cars.

[crcain]

Originally Posted by ForcedPerformance

One of the most surprising things to come out of our recent testing was the observation that at g force of .6 or greater during acceleration you loose oil pressure due to all the oil moving to the backside of the motor rather than being in the pan. This does cause a spike in the temperature of the thrust bearing itself (yes, we have thermocouples inside the turbo, I know we are total dorks!).

How many forward G's have you pulled in this particular car?

Where were you measuring oil pressure?

What was the duration and size of the pressure drop?

[ForcedPerformance]

Originally Posted by BLKCarbonEVO

Robert, I have a HKS 272/280 combo and I was wondering how these cams would perform in my car, 5Rs? Would I have valve clearance issues? I also got your email and I'll holla at you tomorrow at work. I need to order a few things from you!

Mikey

Those cams will run fine. My 4R ran fine too - I just like the 5R better. The only way to know about clearance issues is to check the clearance, I know that is a cop out answer from a DIY perspective, but it's really the only way to know the clearance.

BOOSTON!
Robert

[4g63evoeight]

Originally Posted by ForcedPerformance

Those cams will run fine. My 4R ran fine too - I just like the 5R better. The only way to know about clearance issues is to check the clearance, I know that is a cop out answer from a DIY perspective, but it's really the only way to know the clearance.

BOOSTON!
Robert

i was meaning to ask this also, i was thinking about doing the 5R's but wasn't sure about the piston to valve clearance, some say yes some say no. ( i'm a stock head/stock bottom end car)

[ForcedPerformance]

Originally Posted by crcain

How many forward G's have you pulled in this particular car?

Where were you measuring oil pressure?

What was the duration and size of the pressure drop?

We see over .7g forward acceleration from just a third gear pull, no launch. Just starting at 2500RPM and rolling on full throttle, when the turbo hits it pegs .7g and then some, depends on the traction.

We are measuring the oil pressure in 2 locations. The first is the oil filter housing right after the pump. The second is inside the oil fitting at the turbo oil inlet. We also measure the temperature of the oil at this location and also the temperature of the oil coming out of the thrust bearing. And the temp of the oil coming out of the thrust bearing definitely spikes when the air bubbles just pushed thru the turbo. Not good at all. So be aware that high acceleration can cause oil cavitation and some problems. This might be a new issue for a lot of you guys that are not used to pulling this hard yet. Ignoring these warnings and blowing stuff up does not necessarily get rewarded with a new free turbo for your efforts



The green oil pressure is directly from the oil filter housing, the red one is the oil pressure inside the oil inlet of the turbocharger using our oil supply line kit.


There are some other interesting data traces on that jpg that I can answer questions about so long as the discussion stays civil and friendly.

BOOSTON!
Robert

[RockmanX]

email sent fp

[ForcedPerformance]

Originally Posted by 4g63evoeight

i was meaning to ask this also, i was thinking about doing the 5R's but wasn't sure about the piston to valve clearance, some say yes some say no. ( i'm a stock head/stock bottom end car)

The 5R were not designed to clear a stock piston, so the answer is no. The 4R will, and the 4R also lets the stock retainer clear the stock guide. And I also hit 600whp with the black turbo with the 4R in the motor.

BOOSTON!
Robert

[9sec9]

Robert, looking at your current dyno sheet, I can see why you're measuring accelleratin in 'GEEE' forces. I'm impressed to say the least. GroceriusMaximus said he had a lot of testing to do before you could have it back. The 5R's definitely woke the car up.

[tscompusa]

what kind of solution can we do for the oil pressure loss?

[ForcedPerformance]

I added the dyno graph to the first post I made in this thread, but I'll put it here so more people can see it.

[project_skyline]

Wow thats a pretty big dip in oil pressure. Def looks like some pick up solutions need to be made or something.

I guess that tq tapper is pretty normal for a stock appearing turbo right?

The lateral acceleration force is amazing, this turbo is nutz!