SCR and DCR HELP
01-25-2008, 09:08 PM
#3
Assuming you have stock heads, you'll need to run a .040 gasket and get the heads to 62cc (which would mean milling the heads ~.030) to get 11.3 SCR. And from searching it looks as if the vindicator has a 72.5 IVC, which with the 11.3 SCR puts you at 8.4 DCR.
01-25-2008, 10:25 PM
#5
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Yes you can go to 8.7 on 93, this is where my setup is. But you may run into piston/valve issues depending on how much you have to mill the heads to get it there and the duration of the cam.
01-25-2008, 10:26 PM
#6
Yeah, is what matters. You could just shave a little more off the heads, maybe run a few thousandths smaller head gasket. Measure how far the piston is out of the hole and just order a gasket to give you .030 quench.
I don't know anything about the vindicator, and you may have PTV issues. If I were you I would worry about getting a good quench height. Then have a cam custom ground for your specs and to get the DCR where you want it.
I don't know anything about the vindicator, and you may have PTV issues. If I were you I would worry about getting a good quench height. Then have a cam custom ground for your specs and to get the DCR where you want it.
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01-27-2008, 11:59 AM
#14
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My motor is completely stock right now. Here's what I was looking to install
TFS heads 64cc (will mill if needed)
.040 cometic gaskets
Vengence VRX3 camshaft 226/228 .585/.588 112
Not sure what other numbers you need. I was hoping to get SCR at 11.25:1 and DCR to at least 8.5. Or somewhere in this ballpark
TFS heads 64cc (will mill if needed)
.040 cometic gaskets
Vengence VRX3 camshaft 226/228 .585/.588 112
Not sure what other numbers you need. I was hoping to get SCR at 11.25:1 and DCR to at least 8.5. Or somewhere in this ballpark
01-27-2008, 01:30 PM
#15
My motor is completely stock right now. Here's what I was looking to install
TFS heads 64cc (will mill if needed)
.040 cometic gaskets
Vengence VRX3 camshaft 226/228 .585/.588 112
Not sure what other numbers you need. I was hoping to get SCR at 11.25:1 and DCR to at least 8.5. Or somewhere in this ballpark
TFS heads 64cc (will mill if needed)
.040 cometic gaskets
Vengence VRX3 camshaft 226/228 .585/.588 112
Not sure what other numbers you need. I was hoping to get SCR at 11.25:1 and DCR to at least 8.5. Or somewhere in this ballpark
1. Pistons .007 ABOVE the deck
2. Flat top pistons, i.e. NO valve reliefs
3. VRX3 camshaft has 0 advance/retard ground in, i.e. ICL = 112, IVC = 69.5
64cc heads, 3.910/.040 gasket:
62cc heads, 3.910/.040 gasket: (This gets you to your 11.25:1 static CR goal)
Last edited by 405HP_Z06; 01-27-2008 at 05:28 PM.
01-27-2008, 07:57 PM
#16
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Hey, thanks alot I appreciate that. Couple of questions. Those heads come with 7.5" pushrods, after the .040 cometics and the milling what size would I need then? Also, do you know if that VRX3 would perform better if it had 2 degrees of advance ground in?
01-27-2008, 08:32 PM
#17
You would be best served asking the cam designer. Advancing the cam increases low end power, while retarding increases top end power. It's a delicate trade-off that really depends on your intended use and overall combination.
