2001 Pewter WS6

iTrader: (43)

I keep coming up with a DCR of like 10.87 which seems way high. Am I doing something wrong??? Is this way too high?

Cam Specs are 244/248 112 +2
duration at .006 Int 293 Ex 297
@ .050 Int Open 12 BTDC Close 52 ABDC
Ex Open 58 BBDC Close 10 ATDC
Bore 4.030
Stroke 4.00
Rod Leg 6.125
Head Gasket .043
Head Volume 64cc
Piston -2cc

b727pic

iTrader: (1)

it seems your SCR is over 12.0:1 which is driving your DCR up. are you sure about the piston specs??

2001 Pewter WS6

iTrader: (43)

I just redid this on Jrods excel spread sheet and it cam out to a DCR of 9.00
My pistons are -2cc. Would this be an optimal setup? I run 94octane on the street and add a 104 mix for the track.

b727pic

iTrader: (1)

I could not tell you the limits on SCR for street apps, but it seems you have it dialed in for track use (race gas). I am curious as to the different DCR #'s you are getting though. I used an online calculator and came up with the same #'s as your original post???? what is different with the spread sheet calc's????

SideStep

I get 8.75... What is you piston deck height??? When you say your pistons are -2cc do you mean dish or dome???

2001 Pewter WS6

iTrader: (43)

-2cc dish
deck height of -.008" (out of the hole)

2001 Pewter WS6

iTrader: (43)

http://users3.ev1.net/~black_ops/cam...calculator.xls

Here is Jrods calculator

SideStep

You have to enter the 2cc dish as a positve integer. You would use -2 if the pistons were domed...


.................................................. .............0.006 (lift)
Intake Duration - ID......................................293
Exhaust Duration - ED...................................297
Lobe Center Angle - LCA (also known as LSA)....112
Intake Centerline - ICL..................................110

Bore.............................................. ..............4.03
ST = Stroke............................................ ......4
RL = Rod Length............................................ .6.125
Number of cylinders........................................8
Deck Height............................................ ......-.008
Piston Dome or Dish (- for a dome + for a dish)....2 (Dish, right???)
Compressed Head gasket thickness...................0.043
Cylinder Head Chamber Volume.........................64

Static Compression Ratio...............................12.40415483
Dynamic Compresion Ratio...............................8.936796646


To answer your question, yes the 94 octane and the race gas mix will work for you...

2001 Pewter WS6

iTrader: (43)

That look right... Looks like what I got from J-Rods spreadsheet. Is this optimal???

SideStep

Optimal??? Be a little more detailed. It is flat-out going to have some grunt. If this is for strip only use I would say hell yes.... Street use, weekends only, sure ( ). DD, you are going to spend some money on fuel requirements...

Good Luck,

2001 Pewter WS6

iTrader: (43)

Weekend warrior... Not a daily driver. I hit the track a couple times a month and curise it occassionally on the weekends.

b727pic

iTrader: (1)

I was using this as a guide.....
http://www.aandacorvette.com/dynamic...sion_ratio.asp

SideStep

Funny, I have not looked well but I wonder if they give any credit for their plagiarism and I wonder if Pat Kelley knows they copied his page exactly... even the VB programs he wrote... just funny...

http://members.uia.net/pkelley2/DynamicCR.html