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  #31 (permalink)  
Old 01-06-2013, 01:16 AM
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Originally Posted by F-BIRD'88 View Post
You are probabily getting all carried away for a bunch of nothing.
No, I don't think I am. For one, i'm trying to learn head porting, second if I ever want to upgrade this motor, whether bore and stroke it to a 383 or whatever, I will have the Vortec heads already done, third I want this little stock bore and stroke 350 to run lika a scalled cat for what it is and what its going to be used for, fourth I love wrenchin and playin with my Hot Rods in my garage and doing all I am able to do due to my disability. So, I disagree with you on that perspective BUT, I do Thank you for trying to help me and giving me tips, just like you did on the studs.

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  #32 (permalink)  
Old 01-06-2013, 01:29 AM
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Originally Posted by F-BIRD'88 View Post
That cam runs just fine with all stock vortec head parts.

With small cams like that you do not need to get carried away with porting stock vortec heads.
Most of the flow gain from porting is found at higher .450++ valve lift.
You can clean up the ports to good effect but do not attempt to make race ports. its not nessessary and will not help.

That cam works very well with vortec heads on a 350 and 10:1cr, performer rpm intake and 750 holley/edelbrock carb.
375hp 400+ ftlbs torque.
Thank you for the info on my combo, I actually picked this cam when I was gonna run self ported 305 heads, lol. Like I said at the first of this thread, this motor is goin in my '88 S10 with a th350 or th400, haven't decided yet, which will be used as my daily driver/sleeper truck.
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  #33 (permalink)  
Old 01-06-2013, 01:36 AM
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Originally Posted by F-BIRD'88 View Post
Concentrate on getting the compression ratio correct.
a clean up on the as cast vortec ports is fine for this cam.

See the funnel in the intake port just under the valve. Leave it alone when using that cam.
It has a purpose.
Yes, I have yet to measure my quench so I can order my head gaskets. I'm going to go with long tube headers, 2 1/2" exhaust with these mufflers Dynomax Super Turbo Mufflers 17733 - SummitRacing.com and this converter Hughes Performance XTM Heavy-Duty Towing Series Torque Converters GM11XTM - SummitRacing.com.
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  #34 (permalink)  
Old 01-06-2013, 01:51 AM
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Originally Posted by F-BIRD'88 View Post
Get some 4.10's and a 10" 3000 stall and some sticky tires. It will go like hell.
Do no use a stock GM differential in th stock GM rear end. Get a Eaton or a Auburn posi
and install it correctly. Get some traction bars. Easy 12sec performance from this simple build.
Get the compression ratio correct. You want a true measured 10:1.
Thats exactly the gear i'm gonna run with an Eaton limited slip unit, i'm running one in my '69 Chevy truck and love it, already have the bars but was thinkin about fabbing a 4-link instead, don't know yet. I have my eyes on the tires I wanna run but haven't decided on them yet either completely. Do you think a 3000 stall will be ok for a long term daily driver? I wasn't plannin on turnin this motor over 5K rpms, and not alot of them.
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  #35 (permalink)  
Old 01-06-2013, 01:56 AM
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That is a "towing converter" not a high perf converter.
Yep I know. I want a pretty long life out of this trans/motor combo so i'm not gonna be doin alot of Hot Roddin, but do want it to come alive when I ask it to. Do I need to remove the damper in the Summit springs for this cam?
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  #36 (permalink)  
Old 01-06-2013, 02:01 AM
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Originally Posted by F-BIRD'88 View Post
That is a "towing converter" not a high perf converter.

use the B&M holeshot 3000 converter or the Hughs -30 converter. 10" 3000 stall rated.
These are very street friendly high stall converters.

The towing converter is a very tight low stall for a very heavy truck and dedicated low rpm hiweay towing.
Its the wrong torque converter for a mild perf S-10 / 350 vortec combo.
Thanks for the heads up, changin converters. I like a Hughes a little more than a B&M when it comes to converters. The last S10 I built I ran a Hughes 3500 and it seemed a little much for the street but it was a play toy and not a daily driver.
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  #37 (permalink)  
Old 01-06-2013, 02:06 AM
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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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Old 01-06-2013, 02:09 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, 02:21 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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  #40 (permalink)  
Old 01-07-2013, 10:43 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...

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  #41 (permalink)  
Old 01-08-2013, 02:32 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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  #42 (permalink)  
Old 01-08-2013, 03:07 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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  #43 (permalink)  
Old 01-08-2013, 03:10 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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  #44 (permalink)  
Old 01-08-2013, 03:18 AM
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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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  #45 (permalink)  
Old 01-08-2013, 03:23 AM
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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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