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766 Horsepower! - New Dart LS3 Head and Cam Motion LLR!

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Old 10-17-2015, 04:42 PM
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You would be surprise how thin of oil and low oil pressure some racers will do when they are trying to get the last few HP out of an engine. Whether that is something you want to do in your driver is a whole other story.
Old 10-17-2015, 04:46 PM
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Originally Posted by speedtigger
You would be surprise how thin of oil and low oil pressure some racers will do when they are trying to get the last few HP out of an engine. Whether that is something you want to do in your driver is a whole other story.
Exactly. That's why I asked about 'what is safe' .

KW
Old 10-21-2015, 03:16 PM
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Originally Posted by KW Baraka
Exactly. That's why I asked about 'what is safe' .

KW
Another thing to consider is that this 440" LS engine in the article uses the Dart LS Next block. It has priority main oiling.

Last edited by speedtigger; 10-21-2015 at 03:27 PM.
Old 10-22-2015, 06:37 AM
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Old school rule was 10 psi of oil pressure for every 1,000 rpm.
Old 10-22-2015, 10:23 AM
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Originally Posted by LilSlo1
Old school rule was 10 psi of oil pressure for every 1,000 rpm.
You can get away with much lower. 30-40psig in a 9000RPM drag race engine is pretty common.
Old 10-22-2015, 08:02 PM
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Originally Posted by KCS
You can get away with much lower. 30-40psig in a 9000RPM drag race engine is pretty common.
Race engines are regularly torn down and rebuild. My engine isn't a dedicated race engine....I'd like to get 100K+ miles outta mine.

Originally Posted by speedtigger
Another thing to consider is that this 440" LS engine in the article uses the Dart LS Next block. It has priority main oiling.
OK.....got it!

KW
Old 10-22-2015, 08:14 PM
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Originally Posted by KW Baraka
Race engines are regularly torn down and rebuild. My engine isn't a dedicated race engine....I'd like to get 100K+ miles outta mine.

KW
30-40psig is perfectly safe to run for 100k+, materials and maintenance are going to have more to do with the longevity of the engine. More oil pressure on the gauge may make you feel safer, but it's really no better. It may even be worse.
Old 10-22-2015, 09:24 PM
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If you want an interesting exercise, install one pressure gauge next to the output of the pump and another oil pressure gauge at the very end of the line at the last main to be oiled and check out the pressure difference.
Old 10-22-2015, 10:31 PM
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Originally Posted by KCS
30-40psig is perfectly safe to run for 100k+......
Answers original question.

Thanks!!

KW
Old 11-21-2015, 08:19 AM
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the 440ci made nice power but i think tigger has a better setup for the $.he made 707 on 93 pump gas.dart uses aftermarket block,big ci,and c14 race fuel and super vic intake.lets put tigger engine on c14 and a super vic 4500 and see what the power difference would be
Old 11-29-2015, 01:27 PM
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The numbers are nice BUT.... those numbers have been hit multiple times by Chris Frank with his LS7 brodix and RHS heads, and Chris hits those numbers on street cars!
this thread leaves a lot of questions....
1. thinned out oil
2. pump gas? how much octane [ I assume 93]
3. cam? don't need the exact details on spec but is that combo conducive to street driving or all out race?
Again Chris has been hitting these numbers on a soft aggressive cam that makes the package streetable.
these guys are on the right track but there is still work to be done.
Old 11-29-2015, 02:43 PM
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Frankenstein Racing now sells custom ported Dart Pro1 LS3 heads and says he will have a set on display at PRI this year.
Old 11-29-2015, 02:50 PM
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Originally Posted by speedtigger
Frankenstein Racing now sells custom ported Dart Pro1 LS3 heads and says he will have a set on display at PRI this year.
Wonder how much those suckers will be? Just picked up a 6.2 short block and have big plans, with big compression etc
Old 11-30-2015, 09:51 AM
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Originally Posted by speedtigger
Frankenstein Racing now sells custom ported Dart Pro1 LS3 heads and says he will have a set on display at PRI this year.
Originally Posted by Zmg00camaross
Wonder how much those suckers will be.........
Well.....they told me that their TF heads start at $3400 (+/-)....can't see the Darts being too much different than that.

KW
Old 12-02-2015, 10:46 AM
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Hey guys, Our LS3 Dart heads will be in the $3400 price point. They flow over 400cfm on the intake and 270 plus on the exhaust. We found that the dart head comes as cast at 280cc and flowed 340@.700 on intake and 230 on the exhaust@.700 on our flow bench strait from dart. Our stage 1 stk casting ls3 head is 280cc and flows 375@.650 and 255@.650. So we decided that the dart head would best be used in a larger CI application with a solid roller camshaft. So our head is designed for larger bores 4.100 bigger to make big power in race applications. We will offer a version that fits on a small bore(4.065), but we feel that a stock 821/823 casting will still perform better on the smaller bores.I'll get some pics posted later.
Old 12-02-2015, 10:51 AM
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Do you prefer a stock casting number over the other?
Old 12-02-2015, 12:08 PM
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Originally Posted by Frankenstein
Hey guys, Our LS3 Dart heads will be in the $3400 price point. They flow over 400cfm on the intake and 270 plus on the exhaust. We found that the dart head comes as cast at 280cc and flowed 340@.700 on intake and 230 on the exhaust@.700 on our flow bench strait from dart. Our stage 1 stk casting ls3 head is 280cc and flows 375@.650 and 255@.650. So we decided that the dart head would best be used in a larger CI application with a solid roller camshaft. So our head is designed for larger bores 4.100 bigger to make big power in race applications. We will offer a version that fits on a small bore(4.065), but we feel that a stock 821/823 casting will still perform better on the smaller bores.I'll get some pics posted later.
The Dart heads run pretty good on my 4.005" bore engine:
https://ls1tech.com/forums/generatio...ls3-heads.html
Old 12-02-2015, 12:27 PM
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Originally Posted by Zmg00camaross
Do you prefer a stock casting number over the other?
821 is the best and then the 823
Old 12-02-2015, 12:31 PM
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Originally Posted by speedtigger
The Dart heads run pretty good on my 4.005" bore engine:
https://ls1tech.com/forums/generatio...ls3-heads.html

Not saying they won't perform good on small bore I just prefer something more efficient. If they are used with the stock plastic intake or fast, msd they won't make the power as a more efficient head will. the dart likes more aggressive intake setups.
Old 12-02-2015, 12:36 PM
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Originally Posted by Frankenstein
Not saying they won't perform good on small bore I just prefer something more efficient. If they are used with the stock plastic intake or fast, msd they won't make the power as a more efficient head will. the dart likes more aggressive intake setups.
That is interesting insight. I have wondered if the long runner plastic intakes kill the potential of higher flow, larger CSA heads.


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