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BR, 2.4, high hp/high rpm build?

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Old Oct 27, 2009, 11:22 AM
  #31  
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Pistonspeeds will be quite extreme.. I would try GT4202 with 1.28 A/R turbinehousing. Have you had any lubrication problems with very high reving engines? Any modifications to oil pressure or oil pump?
Old Oct 27, 2009, 12:34 PM
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I'd love to see the results of this!
Old Oct 27, 2009, 12:36 PM
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9000 x 3.937 / 6 = 5900 fpm

IHRA Prostock guys run over 7,000 but typically it is agreed that above 6k fpm rings do "funny" things. I wont even bring up F1 piston speeds, we have a whole thread on this subject.

Cant wait to see some results
Old Oct 27, 2009, 12:43 PM
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Originally Posted by Lucas English
9000 x 3.937 / 6 = 5900 fpm

IHRA Prostock guys run over 7,000 but typically it is agreed that above 6k fpm rings do "funny" things. I wont even bring up F1 piston speeds, we have a whole thread on this subject.

Cant wait to see some results
What's the number on a stock bore/stroke motor at 9000rpm?
Old Oct 27, 2009, 12:52 PM
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Originally Posted by kouzman
What's the number on a stock bore/stroke motor at 9000rpm?
http://www.csgnetwork.com/pistonspeedcalc.html

with 88mm stroke speed is 5196.85fpm. Btw To get "ideal" rod-ratio 1.7 you need 170mm connecting rod. in 2.0 engine 150mm rod is enough.

Last edited by jouniu; Oct 27, 2009 at 12:56 PM.
Old Oct 27, 2009, 01:43 PM
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Well if i had the money id be all over this. Good luck to the lucky sob.
Old Oct 27, 2009, 01:54 PM
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Originally Posted by jouniu
http://www.csgnetwork.com/pistonspeedcalc.html

with 88mm stroke speed is 5196.85fpm. Btw To get "ideal" rod-ratio 1.7 you need 170mm connecting rod. in 2.0 engine 150mm rod is enough.
To put this into perspective our drag cars both use standard 150mm alloy rods, turn 10,500 and see a peak piston speed of 6063 fpm. The Drag 1G has made nearly 80 passes on the same motor with no issues, not counting the dyno. I feel a 2.4 wouldnt be too bad expecially with a longer rod than stock. Its not gonna last forever at that RPM, but nothing that goes to 9k regularly seems to go 100,000 miles anyway.
Old Oct 27, 2009, 02:56 PM
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Originally Posted by SloRice
You're so behind the times....my car is already at BR's and Dan is putting the finishing touches on the 2.4L install. Expect dyno numbers within the hour.
its been an hour or 2 or 5 and i dont see any results?
Old Oct 27, 2009, 03:39 PM
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mmmmm 2.4L high RPM yum yum. good luck. sounds very interesting.
Old Oct 27, 2009, 06:42 PM
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Slorice was the first to send me an e-mail yesterday, if all goes well he will be the car we use for the build.

We will use either the HTA86 or the PTE 6765 on the car.

The biggest problem with the strokers or any engine using the stock 100 mm crank that we've seen is the crank shaft cracking. With the billet crank we are going to use we hope to eliminate that problem.
Old Oct 27, 2009, 06:48 PM
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I would love too but I am in Maryland ftl
Old Oct 27, 2009, 07:11 PM
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My car is sitting in the garage right now heartless and looking for a heart!

I've been thru two stock blocks and was buying a 2.2l but ended up having to get my $ back because it wasn't even assembled. I'd do this..either that or put a stock block in and sell the damn thing lol
Old Oct 27, 2009, 07:12 PM
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Originally Posted by PaperClip
I would love too but I am in Maryland ftl
Bah...two of us in the DC metro area (VA and MD) just picked up our cars from Buschur last weekend and I can think of another from earlier this year from the local WV area. It's only 6-1/2-7 hours away.
Old Oct 27, 2009, 07:19 PM
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Originally Posted by darwin_evo
The idea of having a 2.4L reving to 9k is good, but i doubt a T3 turbo can take it there
I hve a t3 turbo making power to 10k.. depends on what T3..

As we discussed a few weeks ago, the rod stroke ratio on the straight 2.4 is good for 9k i am sure.. Lets get something going with some 10:1 pistons..

Mike
Old Oct 27, 2009, 07:25 PM
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sounds GREAT

If I wasn't buying a house I would be bringing my car to you guys asap

Still interested in more info though

Buddy


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