With heads.. is it true that...
With heads.. is it true that... When a set of heads have smaller valves that they will not make as much power but could possibly run better times at the track due to better midrange power than a set of heads with bigger valves? I want a set of heads that make great power, but I would be more interested in useable power for the street and strip to run better times, instead of having the highest dynoing heads. Price is an factor..
What would you guys reccomend for me. I want stage 2 heads.
Thanks
What would you guys reccomend for me. I want stage 2 heads.
Thanks
Re: With heads.. is it true that... </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Krazy98TA:
<strong> 3 letters TEA </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">4 letters-Jeff <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />
<strong> 3 letters TEA </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">4 letters-Jeff <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />
Re: With heads.. is it true that... What do you guys think about Absolute Speed stage 2 heads as opposed to TEA?
Does anybody have any feedback on my initial question about the smaller valves?
Thanks
Does anybody have any feedback on my initial question about the smaller valves?
Thanks
TECH Fanatic
Joined: Dec 2001
Posts: 1,060
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From: MI
Re: With heads.. is it true that... I don't think you could go wrong with Absolute the smaller valves will make better mid range power on the stock c.i. motor, big valves work best on the large bore motors. I wanted heads that would do the same thing that you want thats why I ordered stage 2 from Absolute.
Re: With heads.. is it true that... Is MTI and GTP putting up good track times with the stock 346? Would a set up like Absolute Speed have better track times than MTI, GTP? What about track times for TEA?
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Re: With heads.. is it true that... Is MTI and GTP putting up good track times with the stock 346? Would a set up like Absolute Speed have better track times than MTI, GTP? What about track times for TEA?
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TECH Apprentice
Joined: May 2002
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From: Leg Dist #31, WA
Re: With heads.. is it true that... You have hit on a big part of it. It's also how the mixture flows into the cylinder. And compression. And injector spray patterns. And on and on.
"Stage 2" is a term that is only applicable from one set of heads to another WITHIN one manufacturer. One Co's Stage 2 may have 2.02 x 1.57 valves, anothers may have 2.055 (or bigger) x 1.60.
Cartek had a story in GMHTP awhile back where they were running close to 10's w/ 2.02 x 1.57 heads.
"Stage 2" is a term that is only applicable from one set of heads to another WITHIN one manufacturer. One Co's Stage 2 may have 2.02 x 1.57 valves, anothers may have 2.055 (or bigger) x 1.60.
Cartek had a story in GMHTP awhile back where they were running close to 10's w/ 2.02 x 1.57 heads.
On The Tree
Joined: Nov 2002
Posts: 183
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From: Shreveport, Louisiana
Re: With heads.. is it true that... </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by mike#9:
<strong> Is MTI and GTP putting up good track times with the stock 346? Would a set up like Absolute Speed have better track times than MTI, GTP? What about track times for TEA? </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">I'm glad you brought this up. So much of the information out there is just flow numbers. Dyno numbers are a little better, but track numbers would really be helpful (keeping all the variables in perspective).
<strong> Is MTI and GTP putting up good track times with the stock 346? Would a set up like Absolute Speed have better track times than MTI, GTP? What about track times for TEA? </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">I'm glad you brought this up. So much of the information out there is just flow numbers. Dyno numbers are a little better, but track numbers would really be helpful (keeping all the variables in perspective).
TECH Addict
Joined: Dec 2001
Posts: 2,298
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From: new england
Re: With heads.. is it true that... Big bores allow for more relief in chamber around bigger valves to allow more flow with them.Port design and size has way more to do with velocity into cylinder than valve sizes do. You really cant overvalve a cylinder, but you can definitely over Size port and hurt performance. I have shifted heads around on flow bench bore and it doesnt have the dramatic effect on port flow that people think it would. FWIW
TECH Addict
Joined: Dec 2001
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From: new england
Re: With heads.. is it true that... </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by LS1derfull:
<strong> Big bores allow for more relief in chamber around bigger valves to allow more flow with them.Port design and size has way more to do with velocity into cylinder than valve sizes do. You really cant overvalve a cylinder, but you can definitely over Size port and hurt performance. I have shifted heads around on flow bench bore and it doesnt have the dramatic effect on port flow that people think it would. FWIW </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">P.S. Oh and thanks Don!
<strong> Big bores allow for more relief in chamber around bigger valves to allow more flow with them.Port design and size has way more to do with velocity into cylinder than valve sizes do. You really cant overvalve a cylinder, but you can definitely over Size port and hurt performance. I have shifted heads around on flow bench bore and it doesnt have the dramatic effect on port flow that people think it would. FWIW </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">P.S. Oh and thanks Don!
Re: With heads.. is it true that... Thunder 224/224 cam,all the bolt ons,Absolute Speed stage 2's 2.02/1.57.A4 with a PT4400 I have gone a best of 11.04@121.4mph.There is more to be had in weather this was run at -700DA here on L.I. it can hit mineshaft -1500DA's and the car is a lock for a 10 sec run.Unlocked dyno was 405hp we plan on a redyno with it locked for some new numbers.This package kicks tail and at a great price.