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Old

Mar 13, 2008 | 01:30 PM

#1

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Launching!

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From: FL

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DCR help...

I'm having a heck of a time calculating my DCR

I found a few good spread sheets on my searches here but they are for stock Comp grind cams.
Here is what I have:

Heads are 241's milled down to ~58cc (~11.4 CR)
Stock GM MLS gaskets
Cam is F13 (230/232 .595/.585 114*)

I am worried my DCR may be too high. LMK what you think!

Old

Mar 13, 2008 | 01:50 PM

#2

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From: Katy, Texas

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You can still put in your cam specs and use the comp lifts for compression. The lift doesn't have anything to do with compression so it won't matter if its comp or not.

Old

Mar 13, 2008 | 10:19 PM

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Launching!

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Ok. Tried it & got an error on the DCR tab (orange) but got it to work on the DCR Manual Calc (Blue Tab):
Static Compression Ratio 11.58
Dynamic Compression Ratio 9.00

Static looks right but got a DCR of 9... That has to be not good

I thought mid to upper 8's we about the max for 93 octane pump gas....

Old

Mar 14, 2008 | 09:35 AM

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From: Lawrenceville, GA

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Yes I heard mid 8's is were you need to be for 93.

Bill

Chug! Chug! Chug!

Old

Mar 14, 2008 | 01:33 PM

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did anoyone figure out how to calculate DCR against barometer and rpm yet or is everyone still caculating cranking compression ?

Old

Mar 14, 2008 | 01:37 PM

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From: Jenison, MI

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You people worry way too much about this DCR/octane fuel thing. It is not that important.

Old

Mar 14, 2008 | 09:16 PM

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Launching!

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From: FL

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Why is it not that important???

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Old

Mar 15, 2008 | 10:27 AM

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Quote:

Originally Posted by cdoggy81

Why is it not that important???

cdoggy81, start a thread asking for either Patrick G or PREDATOR-Z to have look @ your SCR & DCR. If they are in agreement, then OK. I have a feeling that they will suggest a reduction in your DCR.

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Old

Mar 15, 2008 | 10:22 PM

#9

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Launching!

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From: FL

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Roger that

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