| Author |
Message |
    
Michael
Rating: N/A
Votes: 0 (Vote!) | | Posted on Tuesday, March 2, 1999 - 9:22 pm: |       |
I have three simple questions concerning the new
Vortec heads. First what is the recommended spark
plug. Second where can I get a plain set
of center bolt valve covers, prefferable not chrome that will fit this head. Third what material are the valves made of. Stainles steel,
alloy etc. thanks |
PARTSMASTER
Rating: N/A
Votes: 0 (Vote!) | | Posted on Friday, March 5, 1999 - 12:55 am: | |
plugs MR43LTS plugs
valve covers with gasets and mounting hardware $65.00 |
SN1200
Rating: N/A
Votes: 0 (Vote!) | | Posted on Wednesday, April 14, 1999 - 10:35 pm: | |
WHAT IS THE PART # FOR COMPLETE L 31 HEADS? |
Todd
Rating: N/A
Votes: 0 (Vote!) | | Posted on Thursday, April 15, 1999 - 10:32 am: | |
12558060 -- Cast Iron Vortec Cylinder Head Assembly..
Vortec heads are not 'new'. They are a production piece that first appeared on the '96 truck. So stock covers are obtainable over the counter. |
Rob Prince
Rating: N/A
Votes: 0 (Vote!) | | Posted on Wednesday, June 9, 1999 - 1:19 am: | |
I have a 4.3 litre v-6 in a 18.5 ft ski boat that I am interesting in finding out about putting vortec heads on this engine. It has a 4-barrel on it currently. Will I have to change the manifold? What do I need to know in order to make this happen. Thanks in advance. |
Russell allison
Rating: N/A
Votes: 0 (Vote!) | | Posted on Tuesday, June 29, 1999 - 2:27 pm: | |
how do you mod. vortec heads for a older intake manifolds.also is the $210 for a complete head , what valves and springs come with it? |
Rob
Rating: N/A
Votes: 0 (Vote!) | | Posted on Thursday, July 1, 1999 - 6:52 pm: | |
Did vortec heads come on the 92 pick up and if not where can i find out about theses heads that have the pn# 14102193. |
Anonymous
Rating: N/A
Votes: 0 (Vote!) | | Posted on Tuesday, July 6, 1999 - 11:34 pm: | |
the vortec heads came out in 1996 in the ck pick-ups |
Bill Van Horn
Rating: N/A
Votes: 0 (Vote!) | | Posted on Tuesday, July 20, 1999 - 10:54 pm: | |
If I use Vortec heads on a 400 W/ dished pistons, will it have too much compression for the street?
I am going to use a mild 214/224 duration cam. Or would World Products SR Torquer 76cc heads be better? Thanks |
Anemalhous
Rating: N/A
Votes: 0 (Vote!) | | Posted on Wednesday, July 21, 1999 - 8:00 pm: | |
I have two important questions first, do the vortec L-31 heads accept T.B.I. ? Second, will the vortec heads fit on the ZZ-4 block? Thanks for the information. |
MattK
Rating: N/A
Votes: 0 (Vote!) | | Posted on Thursday, July 22, 1999 - 9:22 pm: | |
Bill,
Well which size of dished piston are you talking about? They come in more than one size you know. If you use pistons with a 30cc dish, you will yield 9.1 to 1 compression. If you use pistons with a 22cc dish you will have 9.8 to 1. Of course these numbers are assuming the motor is bored .030" over and has the proper 0.040" quench(deck height + head gasket thickness). A dish any smaller than that, and your compression will be too high for the street. The Vortec eads flow better than the World Products heads. If you want to go with 9.5 to 1 compression or higher(10 to 1), I would strongly recommend using aluminum cylinder heads anyway to prevent knocking and detonation and a proper quench. If you want to stay lower, use the vortec heads if you can find the pistons or use 76cc heads if all you can find are 12-18cc dished pistons. Hope I was insightful. |
MattK
Rating: N/A
Votes: 0 (Vote!) | | Posted on Thursday, July 22, 1999 - 9:26 pm: | |
Anemalhous,
First, the TBI manifold will not fit on vortec heads without drilling new holes in it first. Vortec heads use only 4 bolts per side and enter perpindicular to the ground unlike the 72 degrees that TBI manifold bolts enter at. Second, Vortec heads will fit on and 1st generation small block including the zz4. |
Steve Else
Rating: N/A
Votes: 0 (Vote!) | | Posted on Tuesday, July 27, 1999 - 2:26 pm: | |
Can I use a TPI unit on Vortec heads? I want to buy a 330hp 350 for a replacement motor for my '85 IROC. If not, what do you suggest? |
Anonymous
Rating: N/A
Votes: 0 (Vote!) | | Posted on Friday, July 30, 1999 - 11:57 pm: | |
Ihave a 88 chev 1 ton van, 350 engine, pulling 8,500# load. Can I swap engines to a newer vortec engine? Is this a common procedure, what is a ballpark on dollars. 68,000mi on present engine, getting tired, need more power. |
Neil Heron
Rating: N/A
Votes: 0 (Vote!) | | Posted on Friday, August 6, 1999 - 9:55 pm: | |
I'm currently building a 350 for an 81 Chevy truck and was wondering if there are any companies that are making carburated intakes manifolds for the Vortec heads that an EGR valve can bolt up to?? I'm tring to keep the motor emessions legal. |
Anonymous
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, August 8, 1999 - 5:02 pm: | |
I have a set of 906 vortec heads and would like to use them on our latemodel superstock.
need information on what to watch for when putting in screw in studs, enlarging spring pockets, also any info on what valve dia. works best with these castings. can bowl cut but no runner porting. running max 360 cu.in 2bbl 4412 class carb.ft piston. qany info would be apreciated. |
Bill
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, August 16, 1999 - 2:17 am: | |
I just bought a pair of L31 heads for my 383 that I'm building. Will 87 Corvette valve covers fit these heads? THanks! |
Willie cessor
Rating: N/A
Votes: 0 (Vote!) | | Posted on Tuesday, September 7, 1999 - 9:05 pm: | |
I am using 96 vortec heeds on a 91 5.7 block do I need to drill out the coolant bypass holes in the heads so my water pump will still be used as a coolant bypass. I do not want coolant bypass hoses run all over the top of my engine. |
Rob A
Rating: N/A
Votes: 0 (Vote!) | | Posted on Wednesday, September 8, 1999 - 10:23 pm: | |
Is there any advatage in using the vortec heads over the aluminum L98 heads on a ZZ3 crate motor? How much of a difference in compression will there be? 58cc vs. 64cc. |
Larry Owens
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, September 20, 1999 - 11:55 pm: | |
I currently have 1988 c/k 1500 with a 125,000 mile tired V8. Would like to replace it with a 350 CID GoodWrench crate motor. My question is will my current intake and exhaust manifolds work with this swap. If so there any other ostacles I might encounter other than maybe changing the the computer chip?. |
Admin
Rating: N/A
Votes: 0 (Vote!) | | Posted on Saturday, September 25, 1999 - 8:12 pm: | |
Partsmaster says that this will be a replacement engine. Part # 12520268. You will take the needed parts off of your engine and put on this one. Recommend that you replace the water pump and have the radiator checked. |
Dipron
Rating: N/A
Votes: 0 (Vote!) | | Posted on Tuesday, September 28, 1999 - 5:26 am: | |
Anybody know of an intake manifold that will fit vortec heads for an 88 305 TBI? Or can the vortec heads fit a TPI unit if I get one? |
PARTSMASTER
Rating: N/A
Votes: 0 (Vote!) | | Posted on Tuesday, September 28, 1999 - 11:28 pm: | |
ITS COMING OUT SOON. GM will have one available by the first of the year. It will also have a EGR boss on it. |
Claus
Rating: N/A
Votes: 0 (Vote!) | | Posted on Wednesday, September 29, 1999 - 1:22 am: | |
What is??? TBI to VORTEC intake ???
I need that ! |
2G1
Rating: N/A
Votes: 0 (Vote!) | | Posted on Friday, October 1, 1999 - 11:37 pm: | |
Dose any one know what the difrience in air flow
would be between stock and pocket ported vortec
heades |
Bruce mcmaster
Rating: N/A
Votes: 0 (Vote!) | | Posted on Thursday, October 7, 1999 - 8:50 pm: | |
anyone with info on what to do to 906 vortec heads for a stock car let me know |
Barney
Rating: N/A
Votes: 0 (Vote!) | | Posted on Wednesday, October 13, 1999 - 4:28 pm: | |
I recently picked up a new Small Block Chevy builders guidebook that claimed L31 flow was improved only marginally by pocket porting the intake & exhaust with stock valves. Only full porting was effective. With larger intake/exhaust valves however (2.05/1.6), pocket porting was quite effective, especially in the under 0.400 lift range. |
Barney
Rating: N/A
Votes: 0 (Vote!) | | Posted on Thursday, October 14, 1999 - 6:00 pm: | |
I went back and re-read the L31 Vortec head porting tests ("How to Build Max Performance Chevy Small Blocks on a Budget" by David Vizard, CarTech Inc, 1999) and see that pocket porting was ineffective with both stock and larger valves. Only full porting made any significant difference. The reported flows (CFM@ 28"WG) for the 2.05/1.6 valves were (as best I can read the charts-- excuse all the dashes, the discussion board software removes multiple blanks):
Lift------ Intake ---- Exhaust
100 ------ 70 -------- 65
200 ------ 140 ------ 125
300 ------ 200 ------ 160
400 ------ 230 ------ 185
500 ------ 250 ------ 198
The author goes on to describe how these heads should be ported to retain the excellent swirl and low lift characteristics. It's obvious that the L31's peter out around 500 lift.
For full porting jobs, it obvious that the author likes the World SR Torquer and Sportman II heads better. His flow bench charts seem to bear him out. After spending the $$$ reworking these heads I wonder how they stack up aginst the GMPP alum fast burn heads. |
Bill
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, October 17, 1999 - 9:00 pm: | |
I am having a small cooling problem on my 383 with Vortec heads, and Edelbrock manifold. I am using a reverse rotation waterpump. Without a thermostat, it runs at about 150, with a 180 thermostat it idles cool, but gets really hot if I drive it. I tried using the plug on the front of the manifold to go to my heater core, which goes back to the radiator, but it only helped a little. Do these heads require a special thermostat? Any help would be appreciated. |
Vetteguy
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, October 18, 1999 - 4:53 pm: | |
I'm considering the Vortec heads for the 350 rebuild I'll be doing for my 69 vette. I'd like to use the stock block and install dished pistons to keep the compression down around 9.5:1. I realize that I'll need an intake, but aside from that do the Vortec's have all the accessory mount holes and bosses to install my A/C compressor, PS pump, and Alt.? Will a standard SBC water pump work? |
Mike
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, October 25, 1999 - 3:45 pm: | |
Want to replace the stock heads on the 305 in my 85 4x4 1/2 ton with the vortec castings 12558060.
Not looking for mega-power, just a little more low-mid and some mileage for low bucks. I plan to use Edelbrock's vortec-friendly intake and Holley 600(80457). Probably use a Comp cams CompXtreme 206/214 at.050 .432/.453
1. How "bolt on" are these heads on a 305?
2. Will the valves in these heads clear the stock pistons and cylinder walls with no mods?
3. Will stock valve train (rockers and pushrods)work?
4. Will any water passage mods be neccessary?
5. What about emissions? I live in Texas. |
Racer x
Rating: N/A
Votes: 0 (Vote!) | | Posted on Tuesday, October 26, 1999 - 3:58 am: | |
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