Thread: think tank - vqman's N/A Big Cam SR23DE Build 92x86

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2010-09-08 13:48:54

#31

vqman

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Join Date: 2007-12-12
Location: Fishers, IN
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Ok ok.. So a small lobe S3/4ish profile, and a large lobe C5ish profile...for a custom grind VVL cam....

Is there any reason why this wouldn't work?

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2010-09-08 13:51:55

#32

BenFenner

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Join Date: 2007-12-11
Location: Columbia, SC
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Originally Posted by ...

Is there any reason why this wouldn't work?

Yes. You can't afford it.

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BenFenner's 1994 Black SE-R (given away)
BenFenner's 2000 Black M-Coupe
BenFenner's 2004 Silver SUV
BenFenner's 2008 White Wagon

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2010-09-08 14:27:26

#33

vqman

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There is a thread where they are talking 650 Aussie dollars for custom VVL grind... From some company in Sydney...

300+ hp VVL 2.45L motor...

I could pull this motor and put it in a P11 in a few years after I grow tired of my SE-R

I'm roughly guessing $6k for the motor including VVL block/head - stroker kit, bigger pistons, cams, machine work on the block...

Why can't I afford that?

I think I got it...

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2010-09-08 14:34:19

#34

MR-4Door-SR20DET Online/offline status of MR-4Door-SR20DET is unknown

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- 6k is cheap for a N/A setup like that.

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Originally Posted by SR20GTi-R

NA is a thinking man's game, alot of people dont have the stomach to play NA.

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2010-09-08 14:48:01

#35

BenFenner

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I'll refrain from saying if it would work or not since I don't really know, but FYI the C5 cams don't really work well unless you have a sr20DE with huge header primaries and a high redline. I have no idea how the profile would work on a bored/stroked VE and with whatever header you plan on.

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BenFenner's 1994 Black SE-R (given away)
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2010-09-09 01:38:54

#36

vqman

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Originally Posted by ...

Engine Compression Ratio (CR) Calculator

this compression ratio calculator needs input on bore size, stroke length, etc... to calculate compression...

So it seems to me that it is 100% related.

does adding a larger crank not do both? To me, it seems that it not only brings the piston further down for a lower "bottom dead center" but it also pushes the piston back up into the cylinder further making a smaller (more compressed) combustion chamber. Don't you agree?

b= cylinder bore (diameter)
s= piston stroke length
V_c = clearance volume

It looks to me like compression ratio has EVERYTHING to do with the crank size, connecting rod length and where the piston and connecting rod meet... and bore size too.. forgot to mention that again..

The larger the crank, the more piston stroke you have, the larger the bore.. yada yada..

Here's a little something I drew up with microsoft excel to illustrate how my buddy at work also explained how just the location of the connecting rod pin can change compression:

With the connecting rod connecting to the piston at a "lower" position on an otherwise similarly sized piston (2nd pic from left), it will push more "meat" of the piston into the combustion chamber with a similar sized connecting rod and crank, therefore increasing compression..

the one on the far right, shows how you can keep the same compression ratio, because there is the same amount "meat" above the connecting rod pin. This might allow for a stronger material and lighter weight for increased rev-a-bility.

BTW, connecting rod pin is the red "O".....

BTW I was drunk when I wrote this^

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2010-09-09 02:09:14

#37

vqman

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Originally Posted by BenFenner

lets do it!!!!!

oh wait.. you are on the other side of the country.

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2010-09-10 12:58:44

#38

Teal97

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Originally Posted by ...

I'm roughly guessing $6k for the motor including VVL block/head - stroker kit, bigger pistons, cams, machine work on the block...

sorry, i couldn't resist:o

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AccountKiller

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2010-09-10 13:11:09

#39

Andreas Miko Online/offline status of Andreas Miko is unknown

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Join Date: 2007-12-11
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VE motor = $1000
2.3L bottom end at mazworx = $3,700
head gasket = $250
Header 4 into 1 = $1000
Short runner intake manifold = $700
N1 TB = $400
Franklin cams = $900
Valve springs and retainers = $375
370cc injs = $100
Nismo FPR $135
95-99 Max MAF = $100
Nistune ECU and tune = $500
G Spec Pully = $150
Aluminum flywheel = $350
Clutch = $350

Thats

$10,010 on a 2.3L VE Build

or

$11,610 on a 2.45L VE Builld

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Good Thoughts Bring Good Vibes Which Bring Good Reasoning

I Am A JWT Dealer And VRS Dealer.

If you need any help 305-282-3643

I sell SR20VE, SR20DE and SR20DET motors

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2010-09-10 15:57:51

#40

blackwater32 Online/offline status of blackwater32 is unknown

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Join Date: 2008-03-06
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I have knowledges. Just put in a VQ.

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