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Topic Review (Newest First)
08-14-2010 09:41 AM
ThirdDegree sorry, yeah xe268 at most.
08-14-2010 09:23 AM
turbolover
Quote:
Originally Posted by ThirdDegree
Update: It hasnt been easy, every corner I turn, every guy I get a price from etc. etc. points to one thing... 350 swap. The best I can do, is to NOT spend any significant money on a 305 and do head porting and intake porting by myself. The EQ 305 heads flow about what stan weiss says, but they are in fact $715.00 assembled. Mix that with a vortec intake for $375 and it's a no go.
So- I bought a 350 vortec 882 block and crank. It needs new rods and pistons etc. but at least I wont be throwing my $$ away.
I figure a 355, flat tops, 270 cam, vortecs and a decent exhaust with TPI would get somewhere. The turd gen cars are so heavy, it should be mandatory anyway.
I would consider a slightly smaller cam with TPI. Also you'll want a reverse split on the cam, like running a restricted intake.
08-14-2010 01:14 AM
ThirdDegree
Quote:
Originally Posted by cool rockin daddy
Imagine that, got smart and went with the 350. Good move.
Yeah, now I need some heads, im think the RHS pro torker's would work.
08-13-2010 10:30 PM
cool rockin daddy Imagine that, got smart and went with the 350. Good move.
08-13-2010 01:08 PM
ThirdDegree Update: It hasnt been easy, every corner I turn, every guy I get a price from etc. etc. points to one thing... 350 swap. The best I can do, is to NOT spend any significant money on a 305 and do head porting and intake porting by myself. The EQ 305 heads flow about what stan weiss says, but they are in fact $715.00 assembled. Mix that with a vortec intake for $375 and it's a no go.
So- I bought a 350 vortec 882 block and crank. It needs new rods and pistons etc. but at least I wont be throwing my $$ away.
I figure a 355, flat tops, 270 cam, vortecs and a decent exhaust with TPI would get somewhere. The turd gen cars are so heavy, it should be mandatory anyway.
06-19-2010 10:29 PM
ThirdDegree No actually, its just not having a plan at the moment. I am not broke either, I am trying to do a 305 for once, seemingly how it will never run like a new LS3, or a coyote with any form of redeemable driveability. So I am shooting for mid 13's, to keep most imports at bay. Atleast, most honda/acura products. I graduated UTI, worked for Prewitt, then ProTech, then dyno operating at CCS, then (now) doing Top Fuel Hydro (#777 Disorderly Conduct) with family. I know cars, and performance, just NOT 305's with Vortec heads. From what I have gathered, the STOCK 081 castings are flowing 195/110. With headwork and a valve job its possible to make 240/155, which SHOULD be enough to take this 5 Liter GM in the 13's. Intake choice is going to be key, with a ported base thats siamesed, siamesed runners, and a port job on the plenum with throttle body, full exhaust and some 3.42 gears... I may have close to it. Add a stall and some trans work with a stick tire, and it MAY be there. Lets not forget the custom prom tuning... NOW... This IS simply nothing but a guesstimation.... I dont like gambling with a 305, or my money ON a 305... See how this can be irritating and warrant questions?
Silver, thats awesome! Pretty close to what i'm looking for...what do you guys think about the 1.94's in a 305?? Shrouded? Do you think some better valves with a nice seat job (4-5 angle) valve job in other words with some 1.84's would be better?? The cam is most likely a 206-216 .450 @112... something the TPI knows what to do with.. Maybe more but not much thats for sure.
06-19-2010 10:29 PM
Valkyrie5.7 The 059s do flow well but I wouldn't take those numbers I posted as gospel. I didn't personally test them myself nor do I know the source from where they came from before they wound up on the Stan Weiss chart. I would consider those figures for "educational purposes" only.
06-19-2010 09:26 PM
Silverback Those numbers are killer for a factory 305 head... roughly 40cfm more on both the intake and exhaust than many other 305 heads, and for the most part, the pre-vortec, 80's and 90's 305 heads were better than a lot of the similar vintage 350 heads.

For that matter a friend of mine spent a few hours just doing some basic clean up with a carbide bur (no sanding or real heavy work), installed some 1.94/1.55 valves... they flowed 260intake, 222exhaust at .500" and made 460hp on a well built 350.
06-19-2010 07:45 PM
cool rockin daddy No, it wasn't meant as an insult. However, your tone is increasingly becoming one where an insult would be deserved. I suggested the book because you are all over the map on your questions. First you ask about 305 vortecs. Then you start talking about vortec baseplate for TPI. Then you say you are bucks down. Then you talk about reworked S/R Torquers. Now you ask about milling heads. You sound like you DON'T have a plan, DON'T understand basic engine hotrodding, and you DON'T have any money. Am I wrong on any of those assumptions? If so, I apologize. If not, get the book I mentioned, read up on it, make a plan for your engine, and make a budget to make it happen. If that sounds like an insult to you or too harsh for your sensibilities, that's on you NOT on me.
06-19-2010 05:59 PM
ThirdDegree
Quote:
Originally Posted by cool rockin daddy
Third, do yourself a favor and get a good book on hotrodding chevy engines. You will discover that raising or lowering the compression ration does not make that big of a hp difference. You gain a whopping 4% hp increase with a full point increase of compression. On a 400 hp engine that equates to 16 hp. Milling heads has it's limits as you can mess up the angles of the mating surfaces between heads and intake manifold. Not worth it. Get Lingenfelter's book on "How to Hot Rod Small Block Chevy Engines".
Get a book huh? lol - thats funny! Everything else you said is well known info, im talking about VORTEC heads, and Vortec heads ONLY, no 2 heads are the EXACT same, especially when machining. 4% on a 215hp 305 is about 8.5HP, i'll take that! After modding it will be worth 15hp, well worth worrying about. I would also say a 8.2:1 305 runs like $#!t. I know about intake alignment issues, its fairly easy to fix by hand without hurting flow. Also, telling someone to get a book over a particular head question is BS. I hope you are just meant to help out and that wasnt meant as an insult.
06-19-2010 05:18 PM
cool rockin daddy Third, do yourself a favor and get a good book on hotrodding chevy engines. You will discover that raising or lowering the compression ration does not make that big of a hp difference. You gain a whopping 4% hp increase with a full point increase of compression. On a 400 hp engine that equates to 16 hp. Milling heads has it's limits as you can mess up the angles of the mating surfaces between heads and intake manifold. Not worth it. Get Lingenfelter's book on "How to Hot Rod Small Block Chevy Engines".
06-19-2010 04:13 PM
ThirdDegree What about milling the head .036" to get the chamber I want?? If milling about .006cc off the surface ='s -1cc... A local machinist told me that that would not be a good idea. Honestly he didnt sound like much of a hot rodder. I can mill .024" thousands minimal for a 9:1 compression.
06-19-2010 02:48 PM
automotive breath Consider RHS vortec, better casting and more flow compared to production.
These heads new for ~$850 a pair assembled.

http://www.flatlanderracing.com/rhs-...rotorkerv.html
06-19-2010 02:24 PM
ThirdDegree
Quote:
Originally Posted by cool rockin daddy
Reworked S/R Torquers?! You still need the baseplate and those heads will cost just as much as vortecs.

You gotta pay to play. How much you want to play? Why would you even bother with a 305 TPI? You could probably get a whole 350 TPI for a couple of hundred. What are you looking for, torque or hp? TPI is all about torque.
If you must stick with a 305 then....Stock vortecs will handle a cam like a Comp XE 256. Want more cam? Then get the valve guide boss cutters that will allow more lift. Pick a pair of vortecs up at the local yard for $200, get your vortec TPI base, and your cam and lifters for $150 and you will have gained 40 horses and torque down low for $800 (or less if you shop smartly, scoggin dickey has the price for baseplate at $399, now you're at $750). Cheap for the gains you make.
Local junk yards have NO vortecs. E-bay is the next place, but thats about $400. I can get a set, worked for $700.00 with beehives, guide plates, machined for .600 lift, ls1 style valves.. NEW! I was told NOT to cut them down to 58cc chamber, because it would alter the chambers too much. IS THIS TRUE? I know about paying to play. I play for a living. Just wanted to know if anyone had some cheaper alternatives. thanks.
06-19-2010 01:24 PM
cool rockin daddy Reworked S/R Torquers?! You still need the baseplate and those heads will cost just as much as vortecs.

You gotta pay to play. How much you want to play? Why would you even bother with a 305 TPI? You could probably get a whole 350 TPI for a couple of hundred. What are you looking for, torque or hp? TPI is all about torque.
If you must stick with a 305 then....Stock vortecs will handle a cam like a Comp XE 256. Want more cam? Then get the valve guide boss cutters that will allow more lift. Pick a pair of vortecs up at the local yard for $200, get your vortec TPI base, and your cam and lifters for $150 and you will have gained 40 horses and torque down low for $800 (or less if you shop smartly, scoggin dickey has the price for baseplate at $399, now you're at $750). Cheap for the gains you make.
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