CR Calculator Problems

sprucegagt · 05-27-2008, 04:18 AM

Just bringing this up incase it hasn't been mentioned. But the 3500 default values do not work and you cannot input negative values for the piston deck clearance.

**bszopi** · 05-27-2008, 08:30 AM

The 3500 defaults aren't the only ones missing. And I'll have to look into the negative values one, as this is the first time that I remember hearing about it. Thanks for the feedback though!

**bszopi** · 05-27-2008, 11:38 PM

I can enter negative values just fine for piston deck clearance. In fact, the 3100 has a stock negative value.

As far as the 3500 values, I have them entered from the best info I can find in the forums. The only issue is, the calc comes up with a final CR of 9.58:1 instead of the stock 9.8:1. Anyone care to tell me which values are incorrect? I'm guessing its either the head chamber volume or the piston dish volume.

Superdave · 05-28-2008, 12:21 AM

didn't Ben CC a 3500 piston recently?

all the values look right except for the head gasket bore, i'll see if i can find my old set but they were closer to 3.75" iirc

if you fudge the dish volume down to 24cc it gets alot closer... maybe i'll finally CC one of the spares i have around here.

torq455 · 05-28-2008, 01:00 AM

For some reason I still can't get the CR calc to work with FireFox. Even IE exploder is picky. When I look in the error console I have the following message:

Error: document.getElementById("notes") has no properties
Source File: http://60degreev6.com/apps/crcalc.html
Line: 36

It used to work fine some time ago. I'm not sure if FireFox updates are hurting things, or when 660 made changes.

**bszopi** · 05-28-2008, 07:23 AM

The application itself hasn't ever changedm as I coded the entire thing. Therefore, and forum or CMS software changes shouldn't affect it at all. In fact, if you click on your own link above, the app runs in its own window, independent of any other software. Therefore, if it used to work for you, and it doesn't now, then it has to be on your end somehow.

I'm not sure if anyone actually ever uses the Notes area anyway, so there is a chance I could take that section out. Or maybe, if I get a chance, I can create a new file with the notes area taken out and give you the link to try out. Ok, here... try this one: http://60degreev6.com/apps/crcalc_FF.html It works for me in FF.

EDIT: I take that back about it not changing any. After looking at the code to make the above file, I remembered that I did change the file to include AJAX. The source of the error is in the javascript part of the AJAX call, so it appears FF has an issue with that. Before I dig into a reason why, I'll probably just add a link in the original to goto the FF one.

IsaacHayes · 05-28-2008, 02:48 PM

When doing custom with FF I click calculate and nothing happens.

I tried entering notes and it became a blank page... ?!?!

**SappySE107** · 05-28-2008, 03:05 PM

I have to cc some combustion chambers this week so I will cc the 3500 piston again. I have no idea where I posted the results last time.

Stock 3500 head is 32.4 cc

**bszopi** · 05-28-2008, 05:03 PM

Quote:

Originally Posted by IsaacHayes

When doing custom with FF I click calculate and nothing happens.

I tried entering notes and it became a blank page... ?!?!

Did you try using the new FF one? The note field is not longer active in that version, so I have no idea why entering text in the box would do anything. Guess I'll have to mess with it some more in FF...

sprucegagt · 05-28-2008, 05:13 PM

Brad, thanks for working on it. But I thought the piston deck clearance on a 3400 was 0.020" proud of the block? Has that now changed or am I pulling that value out of my ass?