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The RP968 It's a bit of a thing...

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Old 10-16-2017, 02:25 PM
  #121  
Humboldtgrin
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Patrick needs to sell his 500+hp engine and the head from this last engine so he can put a down payment on that old engine 800+hp engine of Rods.
Old 10-16-2017, 07:17 PM
  #122  
333pg333
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Great job despite not quite getting to the top step Rod. Time was the enemy (no pun intended) and you just had too much on your plate to get all zipped up for 2017. A real shame to show only glimpses of the future so to speak. An unbelievably incredible team effort just to get you into 2nd place. And I'm sure it was a minefield being project manager with new body, suspension, ECU, and of course the Billet motor. Coulda, woulda, shoulda..!!!
Old 10-16-2017, 08:48 PM
  #123  
thingo
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Originally Posted by 951and944S
Rod, noting some future changes you mentioned, are drag reduction moveable wings legal or do the rules state that wings and elements be fixed.

Secondly, the active suspension, is this your solution to lower the rear on the straights to lessen the rear wing angle for drag if in fact "wings must be fixed"...?

T
We are not allowed moveable aero, but not many other restrictions. Yes the efficiency of the aero package is a big part of the development.

They are active dampers, so they can only control the the springs movement, not actually move the car. Lots of benefits with them.
Old 10-16-2017, 08:54 PM
  #124  
thingo
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Originally Posted by Paulyy
For everyone elses sake, have you guys pulled the motor apart and checked the bearings and wear?

The motor hasn't been used that much theoretically, but it had been pushed quite hard over the years.
When we decided to take Thor out and put the 'little' engine back in we did the big end and crank bearings. Yes they were a bit tired, that was the second set of big end (Michael Mount style) and first set of crank bearings in two years, not a lot of miles, but really it's normal to do that in a race engine, I think that is acceptable wear for that power level. We have done a few head gaskets of course, but engine is fine now.
Old 10-16-2017, 08:57 PM
  #125  
thingo
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Originally Posted by V2Rocket
holy ****ing **** that billet motor is ****

is it a taller deck height than stock? my memory may be fuzzy but the motor-mount boss to crank centerline distance looks larger than stock.

rod, did you give any consideration to hydraulic roller cams since you were going all-custom-everything?
Stock deck height. Its a little bit narrower because it doesn't have balance shafts., The engine mounts require a spacer on one side.

The engine should make plenty of power.
Old 10-16-2017, 09:43 PM
  #126  
gruhsy
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Are those pistons as short as they look in the picture? Crazy stuff !!
Old 10-16-2017, 10:01 PM
  #127  
951and944S
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Originally Posted by thingo
We are not allowed moveable aero, but not many other restrictions. Yes the efficiency of the aero package is a big part of the development.

They are active dampers, so they can only control the the springs movement, not actually move the car. Lots of benefits with them.
So your system will be controlled by an ecu with a goal of keeping the car flat.

I meant an active system re. Formula 1, like the '93 Williams.

Some teams had simpler systems but not as sophisticated so other than Williams' fully developed car, no other team (that I know of) invested further since it was under ban consideration. At least the Benetton could over ride the ecu with a push button to lower the just rear of the car, thus lessening the angle of attack on the rear wing for less straight line drag.


You need me to come over there....?



T
Old 10-16-2017, 10:12 PM
  #128  
951and944S
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BTW, you running an electric or belt drive vacuum pump on the crankcase or is there no benefit with dry sump..?

Where do your crankcase gases go...?

T
Old 10-16-2017, 10:33 PM
  #129  
thingo
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We run the crankcase in vacuum. There is a breather off the tank.

A full active suspension system is way beyond our capabilities. Just springs and bumpstops, quite simple. We can control heave and roll in the software, and the driver can change settings on the track.

Yes those pistons are very shallow, but big diameter,116mm. The aluminium rods are substantial but quite light.
Old 10-16-2017, 10:56 PM
  #130  
Paulyy
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Originally Posted by thingo
When we decided to take Thor out and put the 'little' engine back in we did the big end and crank bearings. Yes they were a bit tired, that was the second set of big end (Michael Mount style) and first set of crank bearings in two years, not a lot of miles, but really it's normal to do that in a race engine, I think that is acceptable wear for that power level. We have done a few head gaskets of course, but engine is fine now.
That sounds pretty good considering the circumstances the engine is in.
Old 10-17-2017, 02:02 AM
  #131  
V2Rocket
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116mm bore
Is the Thor block still using the 944's 122mm bore spacing or did you spread it out more?
Old 10-17-2017, 02:13 AM
  #132  
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Originally Posted by V2Rocket
116mm bore
Is the Thor block still using the 944's 122mm bore spacing or did you spread it out more?
All same. basically a 968 block with bigger bores, and a balance shaft delete. You can use the stock crank and head with it.
Old 10-23-2017, 07:06 AM
  #133  
Duke
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It was great seeing you and the car on site. You got a truly amazing piece of car and engineering there Rod! And very impressive work getting the car ready between Friday and Saturday.
Achieving the results you did with the current power level is fantastic and I suspect we will see the first sub 1.20 lap next year with Thor up and running
Old 10-23-2017, 08:15 AM
  #134  
thingo
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Thanks Gustaf, great meeting you. We’ve always had minor problems which have limited our testing, but we all know the potential. Don’t know if just a 1.19 will be good enough next year. I think we will need more than an extra 300hp...
Old 10-23-2017, 11:29 AM
  #135  
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Originally Posted by thingo
Thanks Gustaf, great meeting you. We’ve always had minor problems which have limited our testing, but we all know the potential. Don’t know if just a 1.19 will be good enough next year. I think we will need more than an extra 300hp...
Maybe Elmer can build you a 928 based billet block using Thor heads ;-) Turbocharged billet 8L should give you all the power you could ever need!


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