He shoots ...he scores!!!!!! - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Estanley · 07-29-2002, 04:32 PM

Scored a complete Vortec with new Bowtie intake for free this weekend. It has spun a bearing but the heads are good and that beautiful intake is brand new. Has anyone done a buildup using a Vortec block? I have thoughts on stroking it. For now I'm going to have a valve job done on the heads with a little tricking and run them on my other 350. BUT I am thinking of really packing the Vortec with go fast goodies after I finish the frame off on the truck. Any thoughts, advice, criticisms or praise is welcome.

Durney · 07-29-2002, 04:39 PM

We had a sub-contract to do R&D on the Vortec V31A heads years ago... there is considerable flow available if done correctly
(the exhaust runner & valve configuration is critical).

Durney (@ GMS)

anyone respond to my post below?

**68SWB4x4** · 07-29-2002, 04:43 PM

you bastard! thats way to good of a deal
congrats

stllookn · 07-29-2002, 04:49 PM

Incredible score! Durney...where have you been hiding? Only two posts and you drop a bomb like "...we did R&D on Vortec heads?" We have to hear more about this. What can be done to the Vortecs to make them flow better...where, what and how much? BTW what is GMS?

Durney · 07-29-2002, 05:51 PM

Well at the risk of sounding hoi-poli I cant go into great detail on any R&D as thats confidential. What I can say is we learned enough (as well as several other builders around the country) to start a racing series based upon the use of these heads. I pulled the file on one of my circle track customers and checked the billing on the head work 297 cfm @28" with 14 in/oz swirl and and no adapter. Now mind you these were completely filled and started from scratch (yeah I know it was pushing the rules but thats racing) and the $$$ were ...well ...lots. I dont want to get into describing porting techniques because well at the riskof sounding like a prima donna, most people do more harm than good with a die grinder....

But we can normally do the port work (I&E) machine it for the larger valves, cnc the seats, and flow a set for about 700.00.
and these will out power the "E-series" aftermarket Vortec's
Be VERY carefull about magazine HP and flow/HP figures guys most of that stuff is paid for by the advertisers.......

Find a builder thats been in business for a long time and is active in current racing and one you can trust (thats unfortunately the hard part)...... and be prepared to spend more than Joe Blow ...

As far as where I have been ??? As I said not on this side of the hobby. The shop is closed for the day sooo... I am on the PC.

Longhorn Man · 07-29-2002, 05:59 PM

The vortec heads are very hard to port and come out ahead (no pun intended) and is very responsive box stock.
And that is one heck of a score too! Congrats.

Estanley · 07-29-2002, 06:47 PM

ttt

lukecp · 07-29-2002, 07:37 PM

If the Vortec block is still good, i would use it over a older block. It is made for a roller camshaft, which is more efficent than a older camshaft with hydrualic or solid lifters. Roller cams do cost a bit more though. You can stroke the block, Scat makes a 383 stroker crank for 1-piece main seal blocks for around $260. Good luck!

Longhorn Man · 07-29-2002, 07:41 PM

Good point yellow...one thing to remember is the lack of a fuel pump hole. Not a big deal though...the electric ones are easy enough to install.

Estanley · 07-31-2002, 09:00 AM

Did they ever make a vortec with the hole for the fuel pump. Maybe the earliest ones??? Its looks like there is a hole for the fuel pump on this block. If it didn't have the hole wouldn't that area just be smooth. It does have the one piece rear seal though. Who knows the block may be something else but the heads are definitely Vortec.

Longhorn Man · 07-31-2002, 05:10 PM

I have seen someone (maybe on this board) who claimed to have a real vortec engine with a fuel pump mount on it...but I have read in noumerouse places that they never had it.

69mychevy · 07-31-2002, 05:19 PM

ur makin me jealous for further reference just say i bought a vortec engine lol

07-29-2002, 04:32 PM	#1
Estanley Registered User Join Date: Nov 2001 Location: Eatonton, GA, USA Posts: 191	He shoots ...he scores!!!!!! Scored a complete Vortec with new Bowtie intake for free this weekend. It has spun a bearing but the heads are good and that beautiful intake is brand new. Has anyone done a buildup using a Vortec block? I have thoughts on stroking it. For now I'm going to have a valve job done on the heads with a little tricking and run them on my other 350. BUT I am thinking of really packing the Vortec with go fast goodies after I finish the frame off on the truck. Any thoughts, advice, criticisms or praise is welcome.

07-29-2002, 04:43 PM	#3
68SWB4x4 Strongman Garage Join Date: Apr 2000 Location: Salinas, CA Posts: 10,241	you bastard! thats way to good of a deal congrats __________________ Kalle 68 GMC Suburban 1500 4x4 SOLD 69 Pontiac Lemans 99 Silverado 4.8 5 speed ECSB [ Facebook Instagram Subscribe on YOUTUBE

07-29-2002, 04:49 PM	#4
stllookn Saving 1 truck at a time! Join Date: Aug 2001 Location: Kent, WA Posts: 6,465	Incredible score! Durney...where have you been hiding? Only two posts and you drop a bomb like "...we did R&D on Vortec heads?" We have to hear more about this. What can be done to the Vortecs to make them flow better...where, what and how much? BTW what is GMS? __________________ '68 C20 Longhorn 50th Anniversary 400/TH400 '68 C20 Longhorn 50th Anniversary 468/TH400w/buckets '72 C20 Halfhorn (Longhorn w/o cab and front clip) '69 Flxible Cruiser (look up ugly in the dictionary)

07-29-2002, 06:47 PM	#7
Estanley Registered User Join Date: Nov 2001 Location: Eatonton, GA, USA Posts: 191	ttt ttt

07-29-2002, 07:37 PM	#8
lukecp Formerly yellow72custom Join Date: May 2001 Location: Austin, TX Posts: 7,531	If the Vortec block is still good, i would use it over a older block. It is made for a roller camshaft, which is more efficent than a older camshaft with hydrualic or solid lifters. Roller cams do cost a bit more though. You can stroke the block, Scat makes a 383 stroker crank for 1-piece main seal blocks for around $260. Good luck! __________________ '72 Chevy C10 Mild 350/TH350/3.07. Ochre/White. Old high school ride. '70 GMC C2500 '62 327 4bbl/SM465/4.56-geared Dana 60. White/White. Project or parts truck. '97 Saturn SL DD. 1.9/5-speed. 40+ highway mpg

07-29-2002, 04:39 PM	#2
Durney Registered User Join Date: Jul 2002 Location: Michigan Posts: 158	We had a sub-contract to do R&D on the Vortec V31A heads years ago... there is considerable flow available if done correctly (the exhaust runner & valve configuration is critical). Durney (@ GMS) anyone respond to my post below?

07-29-2002, 05:51 PM	#5
Durney Registered User Join Date: Jul 2002 Location: Michigan Posts: 158	Well at the risk of sounding hoi-poli I cant go into great detail on any R&D as thats confidential. What I can say is we learned enough (as well as several other builders around the country) to start a racing series based upon the use of these heads. I pulled the file on one of my circle track customers and checked the billing on the head work 297 cfm @28" with 14 in/oz swirl and and no adapter. Now mind you these were completely filled and started from scratch (yeah I know it was pushing the rules but thats racing) and the $$$ were ...well ...lots. I dont want to get into describing porting techniques because well at the riskof sounding like a prima donna, most people do more harm than good with a die grinder.... But we can normally do the port work (I&E) machine it for the larger valves, cnc the seats, and flow a set for about 700.00. and these will out power the "E-series" aftermarket Vortec's Be VERY carefull about magazine HP and flow/HP figures guys most of that stuff is paid for by the advertisers....... Find a builder thats been in business for a long time and is active in current racing and one you can trust (thats unfortunately the hard part)...... and be prepared to spend more than Joe Blow ... As far as where I have been ??? As I said not on this side of the hobby. The shop is closed for the day sooo... I am on the PC.

07-29-2002, 05:59 PM	#6
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	The vortec heads are very hard to port and come out ahead (no pun intended) and is very responsive box stock. And that is one heck of a score too! Congrats.

07-29-2002, 07:41 PM	#9
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	Good point yellow...one thing to remember is the lack of a fuel pump hole. Not a big deal though...the electric ones are easy enough to install.

07-31-2002, 09:00 AM	#10
Estanley Registered User Join Date: Nov 2001 Location: Eatonton, GA, USA Posts: 191	Fuel pump hole Did they ever make a vortec with the hole for the fuel pump. Maybe the earliest ones??? Its looks like there is a hole for the fuel pump on this block. If it didn't have the hole wouldn't that area just be smooth. It does have the one piece rear seal though. Who knows the block may be something else but the heads are definitely Vortec.

07-31-2002, 05:10 PM	#11
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	I have seen someone (maybe on this board) who claimed to have a real vortec engine with a fuel pump mount on it...but I have read in noumerouse places that they never had it.

07-31-2002, 05:19 PM	#12
69mychevy yes i did post something Join Date: Jun 2002 Posts: 244	ur makin me jealous for further reference just say i bought a vortec engine lol __________________ you can want in one hand and s h i t in the other and see which fills first NO MATTER HOW BEAUTIFUL THE GIRL(S) IN MY AVATAR IS PLEASE READ MY POST



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