GM high tech DART heads results
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http://www.gmhightechperformance.com...ade/index.html
Not bad I guess. 460hp (at the crank) with a 355, as-cast DART PRO1 heads and a mild cam (similar to cc467). Just thought I'd share. Enjoy
Not bad I guess. 460hp (at the crank) with a 355, as-cast DART PRO1 heads and a mild cam (similar to cc467). Just thought I'd share. Enjoy
![Chug! Chug! Chug!](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_chug.gif)
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http://www.gmhightechperformance.com...ade/index.html
Not bad I guess. 460hp (at the crank) with a 355, as-cast DART PRO1 heads and a mild cam (similar to cc467). Just thought I'd share. Enjoy![Chug! Chug! Chug!](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_chug.gif)
Not bad I guess. 460hp (at the crank) with a 355, as-cast DART PRO1 heads and a mild cam (similar to cc467). Just thought I'd share. Enjoy
![Chug! Chug! Chug!](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_chug.gif)
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My old factory heads were warped beyond belief so I purchased the DART PRO1 heads and just threw them on. Didn't have money at the time for porting. Lloyd Elliot will surely be getting his hands on these in the mere future when I can afford it.
As for compression ratio, with 0.029 headgaskets, mine is 11.1-2:1 (someone did the math for me i forgot what it was exactly)
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it has an electric water pump, no other accessories, ported intake manifold, and tuned with an aftermarket ECU. engine would probably make 380 rwhp with accessories and through a 6 speed/10 bolt. color me unimpressed.
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As-cast, the 180s do not outflow the stage2 heads you get from LE or AI, (257@ .500 VS ~265)
but Dart now offers CNC-ported 200 and 215cc versions which do seem
to flow pretty good. I'm curious to see how they perform on an engine.
Dart had a little bit of info on their site.
http://www.dartheads.com/download_file.php?pvk=309
I think I remember seeing flow numbers on the 215s somewhere.
Something like 290cfm@.650 IIRC.
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that combo has no accessories and an electric water pump. that is a considerable amount of power unlocked right there that shouldn't be attributed to the heads, along with a ported intake, a 58mm throttle body, and an aftermarket ECU. I bet a set of LE1 heads would outperform them. my stock heads with a valve job and some bowl work that I paid $300 for laid down 390 rwhp through an unlocked big stall automatic, maxing out the injectors. that engine is not maxing out the injectors, so Im pretty sure my engine makes more power too and my heads aren't even on par with LE1 heads.
I just think if that engine was in an actual car with a full accessory drive the numbers wouldn't be all that impressive.
I just think if that engine was in an actual car with a full accessory drive the numbers wouldn't be all that impressive.
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that combo has no accessories and an electric water pump. that is a considerable amount of power unlocked right there that shouldn't be attributed to the heads, along with a ported intake, a 58mm throttle body, and an aftermarket ECU. I bet a set of LE1 heads would outperform them. my stock heads with a valve job and some bowl work that I paid $300 for laid down 390 rwhp through an unlocked big stall automatic, maxing out the injectors. that engine is not maxing out the injectors, so Im pretty sure my engine makes more power too and my heads aren't even on par with LE1 heads.
I just think if that engine was in an actual car with a full accessory drive the numbers wouldn't be all that impressive.
I just think if that engine was in an actual car with a full accessory drive the numbers wouldn't be all that impressive.
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These are the #'s we saw on the fixturing & setup we use for the GM LT1's. You may attempt to draw comparisons between the reported flow numbers, though it is largely fruitless.
![](http://www.advancedinduction.com/flowdata/Dart-180-LT1-Flowsheet.jpg)
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Here is a link to a test we did with Ellwein when these heads were first released. If you care to read it, data is provided: http://www.impalassforum.com/vBullet...72&postcount=1
Those results in and of themselves don't mean much because without multiple data points we have no basis for comparison. So, for comparisons sake there was another Ellwein 383 tested that afternoon. It had our 215cc TFS heads with a very mild SR and a GM manifold. It used the same shortblock, had less compression, and was up right at 100hp over the Dart headed engine. Yes there was more money in it, but that is an immense difference. Approximately a 20% vs. 50% gain over a stock long-block. It is unlikely the engine with our top-end cost 2.5x more from Karl in total.
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If you have an unmolested set of GM LT cores then you are set for most builds. If not, then we're fortunate that Dart, AFR, TFS, etc. are producing LT castings for us at reasonable prices. Obviously, a casting with more potential will outperform a GM head, but only if your application and budget supports the associated parts & labor required to utilize that potential.
Hope that helps more than it hurts. Take care
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Find someone who has met your goals and emulate their setup. ![Happy](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_stretch.gif)
If you have an unmolested set of GM LT cores then you are set for most builds.
Obviously, a casting with more potential will outperform a GM head, but only if your application and budget supports the associated parts & labor required to utilize that potential.
![Happy](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_stretch.gif)
If you have an unmolested set of GM LT cores then you are set for most builds.
Obviously, a casting with more potential will outperform a GM head, but only if your application and budget supports the associated parts & labor required to utilize that potential.
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that combo has no accessories and an electric water pump. that is a considerable amount of power unlocked right there that shouldn't be attributed to the heads, along with a ported intake, a 58mm throttle body, and an aftermarket ECU. I bet a set of LE1 heads would outperform them. my stock heads with a valve job and some bowl work that I paid $300 for laid down 390 rwhp through an unlocked big stall automatic, maxing out the injectors. that engine is not maxing out the injectors, so Im pretty sure my engine makes more power too and my heads aren't even on par with LE1 heads.
I just think if that engine was in an actual car with a full accessory drive the numbers wouldn't be all that impressive.
I just think if that engine was in an actual car with a full accessory drive the numbers wouldn't be all that impressive.
![Chug! Chug! Chug!](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_chug.gif)