Dart 205's or 225's?
04-15-2006, 11:08 AM
#6
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I went with the 225's I'm going to be installing this week and I'll be back with #'s.
The way I see it is when you port a LS6 head or any head for that matter your gonna be around 215-230 anyway ,plus the 225's have a better runner to begin with from what I'm told. I have raced many BBC with Dart 320's and 360's CNC'd, my friend who owns a high performance head co. and does many many race cars and boats told me to go 225, many people say the 225 runner is to big for a stock bore LS1, I believe it all comes down to your setup, big stall, large cam, gears and what your goals are for the car. Bob from Precision Porting even reccomends the 225 as well. All this flow talk and peak flow doesn't mean jack until you take it to the track and see what it does.
As they say " The Bullshit stops when the green light pops"
http://forums.corvetteforum.com/show...2&postcount=24
Corvette Forum - View Single Post - Let's see some dynos on the new Dart heads!
John
The way I see it is when you port a LS6 head or any head for that matter your gonna be around 215-230 anyway ,plus the 225's have a better runner to begin with from what I'm told. I have raced many BBC with Dart 320's and 360's CNC'd, my friend who owns a high performance head co. and does many many race cars and boats told me to go 225, many people say the 225 runner is to big for a stock bore LS1, I believe it all comes down to your setup, big stall, large cam, gears and what your goals are for the car. Bob from Precision Porting even reccomends the 225 as well. All this flow talk and peak flow doesn't mean jack until you take it to the track and see what it does.
As they say " The Bullshit stops when the green light pops"
http://forums.corvetteforum.com/show...2&postcount=24
Corvette Forum - View Single Post - Let's see some dynos on the new Dart heads!
John
04-15-2006, 11:48 AM
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Depends on what you want.More low end torque/power under the curve (excellent street setup).Or Higher peak w/more topend (excellent drag setup).I don't think it would be a huge difference but with an m6 w/stock gears I would lean more towards the 205's.I was trying to decide on a setup like this.I think the 205's w/f13 would be an awesome street setup.And the 225's with an f15 would be a killer drag setup
dart 225 setup-->https://ls1tech.com/forums/showthrea...light=dart+225
dart 205 setup->https://ls1tech.com/forums/showthrea...light=dart+205
dart 225 setup-->https://ls1tech.com/forums/showthrea...light=dart+225
dart 205 setup->https://ls1tech.com/forums/showthrea...light=dart+205
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04-15-2006, 01:42 PM
#10
I think Dart put a lot of R&D into these heads and their flow, which isn't totally reflected in the dry flow numbers that are advertised. I wouldn't get them ported as the only ones who understand the design is Dart. I would go out of the box, or lightly sanded but not opened up more.
04-15-2006, 01:50 PM
#11
Originally Posted by vettenuts
I think Dart put a lot of R&D into these heads and their flow, which isn't totally reflected in the dry flow numbers that are advertised. I wouldn't get them ported as the only ones who understand the design is Dart. I would go out of the box, or lightly sanded but not opened up more.
The as-cast Dart 225s are excellent. The Stage II CNC ported versions have a 254cc intake runner. 
__________________
2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2018 Cadillac Escalade 6.2L A10 Pat G tuned.
LS1,LS2,LS3,LS7,LT1 Custom Camshaft Specialist For custom camshaft help press here.
Custom LSX tuning in person or via email press here.
2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2018 Cadillac Escalade 6.2L A10 Pat G tuned.
LS1,LS2,LS3,LS7,LT1 Custom Camshaft Specialist For custom camshaft help press here.
Custom LSX tuning in person or via email press here.
04-15-2006, 06:23 PM
#12
Originally Posted by Patrick G
The as-cast Dart 225s are excellent. The Stage II CNC ported versions have a 254cc intake runner.
04-15-2006, 06:29 PM
#13
Originally Posted by DavidNJ
I find that curious. Dart's published numbers imply their 205 flows better than the AFR 205 below .5" lift, and equal of close above it.Their 225 seems weaker at low lifts...is it really better?
