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  #31 (permalink)  
Old 01-06-2013, 01:06 AM
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Quote:
Originally Posted by F-BIRD'88 View Post
Yes the 3000 stall is fie and exactly what you want.
When I drag raced this exact engine combo I shifted at 5000 rpm.
I used a 10" 3600 stall and 4.10's street strip drive it everywhere.

Get sticky tires so you have traction. M/T or BFG stickys. P235-60-15 4.10 gears
if you want to fab. make your own Caltracs.
Thats the exact size tire I ran on my last S10 and the size I have planned for this one, lol. I have a set of plans for Caltracs that a buddy of mine fabbed up for his 81' Camaro that I may go by on my S10.

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  #32 (permalink)  
Old 01-06-2013, 01:09 AM
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Originally Posted by F-BIRD'88 View Post
If you are using any of the common stock diameter high perf valve springs you remove the inner damper
to go on a stock vortec head. EG lunati 73943. Some people use the GM LS-6 springs and comp 787-16 retainers on these heads.
With this 1103 camshaft the stock GM vortec head springs are fine. You need nto get all carried away
with valve spring pressure at all for this mild cam. You do not need to rev the **** out of the combo with this cam. 5000-5500 rpm is plenty. Its all about torque.
You got that right, it is all about torque, with me anyway. I have already cut the guides down so do I still run the Vortec springs without a locator or run the Summit springs without the damper?
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Old 01-06-2013, 01:21 AM
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Originally Posted by F-BIRD'88 View Post
If you did not machine the spring seat inner diameter then remove the inner damper.
I did machine it for the Summit springs so I have to run the damper or a locator right?
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Old 01-07-2013, 09:43 PM
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.. Your setup should HP peak around 5500-5700 RPMs, shift around 6000 or so...

.. 275-60R15 rear tires should fit under there...

.. Porting the intake ports is most important... you only have a max of 14.7 psi pushing air into the intake ports of a N/A engine... several hundred psi pushing it out the exhaust... Comp cams claims you can reduce exhaust valve lift by 2/3's with little effect on performance...

.. The exception, of course, would be engines with really horrible exhaust ports to start with... I've had to remove the air reactor boss from the ports of a '77 351W engine, it blocks about 80% of the port which was small to begin with... it wasn't even used on the marine engine I was building up... Ford should have sold Mercruiser engines without them... I don't think Mercruiser even realized the bosses were in there, since they didn't change the HP rating after the engines started coming through with the blocked ports... Mercruiser switched to Chevy engines the next year...

Last edited by BuzzLOL; 01-07-2013 at 09:57 PM.
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Old 01-08-2013, 01:32 AM
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Ok, I finished one head and got the other one apart and measured my quench this afternoon after my doctors app. I came up with 0.0260 in the hole. I'm running a 4 valve relief flat top that i'm guessing is around +6 vol. and the Vortec heads at 64cc. Like I said earlier, i'm running the Summit K1103 cam-Advertised Duration 272/282, Lift .442/.465 on a 112lsa. The way I figured it, keep in mind i'm still learning on DCR and SCR, I need to run a .028 head gasket. Am I on the right track? If so what do ya'll think about this gasket- Chevrolet Performance Head Gaskets 14096405 - SummitRacing.com ? Is there a better gasket both quality and price? If i'm completely off base lol, what gasket do I need to run with my setup? I'm shootin for as close to 10.1cr as I can get. Thanks.
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Old 01-08-2013, 02:07 AM
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First time porting heads

This fel-pro .015 thick gasket wiil set you quench at .041 by your .026 measurement. Fel-Pro Performance Head Gaskets Q1094 - SummitRacing.com. Your static compression would be 10.248 and the DCR 8.295.
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Old 01-08-2013, 02:10 AM
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Sorry, I forgot to add that the head gaskets that came in my gasket kit, Sealed Power Gasket Sets Z2601000 - SummitRacing.com , are .039 compressed thickness which, once again if i'm figuring this right, would put my motor at 9.94.1cr.
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Old 01-08-2013, 02:18 AM
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Quote:
Originally Posted by cdminter59 View Post
This fel-pro .015 thick gasket wiil set you quench at .041 by your .026 measurement. Fel-Pro Performance Head Gaskets Q1094 - SummitRacing.com. Your static compression would be 10.248 and the DCR 8.295.
So if this were your build this is the gasket you would go with? I have a few old cam cards that are out in the garage that I plan on bringin in tomorrow so I can practice on this DCR figuring. Thank you for the link cdminter.
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Old 01-08-2013, 02:23 AM
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Quote:
Originally Posted by cdminter59 View Post
This fel-pro .015 thick gasket wiil set you quench at .041 by your .026 measurement. Fel-Pro Performance Head Gaskets Q1094 - SummitRacing.com. Your static compression would be 10.248 and the DCR 8.295.
How did you figure that? I'm coming up with 10.53.1, lol. What did you put in for Deck Clearance?
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Old 01-08-2013, 03:53 AM
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.. I get 10.24:1 static using 6cc pistons, .015 gasket, .026 deck, 4.030 bore, 3.48 stroke, 64cc heads, 8 cylinders(for cubic inches/L.) using Summit's compression ratio calculator. Lower C.R. if pistons have sizable champfer on top outer edge...

.. I would definitely use the thinner gasket for better quench effects/benefits and power... despite slightly higher compression ratio...

Compression Calculator - SummitRacing.com
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Old 01-08-2013, 04:14 AM
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Originally Posted by BuzzLOL View Post
.. I get 10.24:1 static using 6cc pistons, .015 gasket, .026 deck, 4.030 bore, 3.48 stroke, 64cc heads, 8 cylinders(for cubic inches/L.) using Summit's compression ratio calculator. Lower C.R. if pistons have sizable champfer on top outer edge...

.. I would definitely use the thinner gasket for better quench effects/benefits and power... despite slightly higher compression ratio...

Compression Calculator - SummitRacing.com
This is a stock 4.00 bore motor and I just ordered the gaskets, lol.
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Old 01-08-2013, 10:09 AM
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First time porting heads

I used this website's calculator. United Engine & Machine Co. Incorporated Cylinder Head Volume: 64cc Piston Head Volume: 6 Gasket Thickness: .015 Gasket Bore: 4.100 Cylinder Bore: 4.030 Deck Clearance: .026 Stroke: 3.4800 Rod Length: 5.7 Intake Valve Closing: 63 (DO NOT ADD 15) (Use valve timing @ 6*) Here is an easy formula to get intake valve closing point. Advertised intake duration / 2 = ?, ? + LSA = sum, Sum - (LSA - ICL) = ?, ? - 180* = Intake closing point 272 / 2 = 136, 136 + 112 = 248, 248 - (112 - 107) = 243, 243 - 180* = 63

Last edited by cdminter59; 01-08-2013 at 10:22 AM.
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  #43 (permalink)  
Old 01-08-2013, 10:20 AM
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Remember.To smooth port the runners in Vortec heads destroys the "Vortec effect" which is there as part of their design which suspends the A/F mixture.The exhaust side on the other hand will benefit from porting.
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  #44 (permalink)  
Old 01-08-2013, 10:24 AM
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Quote:
Originally Posted by 1Gary View Post
Remember.To smooth port the runners in Vortec heads destroys the "Vortec effect" which is there as part of their design which suspends the A/F mixture.The exhaust side on the other hand will benefit from porting.
Who sold you that line of crap? The vortec heads perform as well as they do thanks to a tall runner, better short turn, and better chamber- it doesn't have a damn thing to do with surface finish.
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Old 01-08-2013, 10:28 AM
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Quote:
Originally Posted by cdminter59 View Post
I used this website's calculator. United Engine & Machine Co. Incorporated Cylinder Head Volume: 64cc Piston Head Volume: 6 Gasket Thickness: .015 Gasket Bore: 4.100 Cylinder Bore: 4.030 Deck Clearance: .026 Stroke: 3.4800 Rod Length: 5.7 Intake Valve Closing: 63 (DO NOT ADD 15) (Use valve timing @ 6*) Here is an easy formula to get intake valve closing point. Advertised intake duration / 2 = ?, ? + LSA = sum, Sum - (LSA - ICL) = ?, ? - 180* = Intake closing point 272 / 2 = 136, 136 + 112 = 248, 248 - (112 - 107) = 243, 243 - 180* = 63
Thank you!!!
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