Dart 205 (As Cast)Flow #'s
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Teching In
Joined: Jan 2005
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From: Connecticut
Dart 205 (As Cast)Flow #'s I just received the flow #'s for my Dart 205's from my Machine shop. They were flowed at 28" and as cast from Dart. The intake was flowed with a clay radius and the exhaust with a pipe. I have included the complete intake flow #'s but only have the .500 and .600 exhaust #'s at this time.
Intake #'s
.100/ 65.7
.200/ 132.9
.300/ 194.7
.400/ 247.7
.500/ 281.1
.600/ 295.4
Exhaust #'s
.500/ 208
.600/ 222.7
My head porter stated he thought the heads were very nice as cast but was confident he could pick the low and high lift #'s up a bit with a slight clean up of the ports and blending the bowls(valve Job) in better. This work is being completed at the moment and I will post the results of his work.
On a side note I had a set of PRC's 2.5 heads flowed on the same bench not too long ago and the Darts flow #'s were very close to these despite having a 22.5 cc smaller intake port volume.
PRC's 2.5's
Intake #'s Exhaust #'s
.100/ 68 .100/ 52
.200/ 137 .200/ 137
.300/ 199 .300/ 199
.400/ 247 .400/ 179
.500/ 281 .500/ 207
.550/ 293 .600/ 220
.600/ 281
Btw the shop stated their flow bench is a little stingy on #'s.
Intake #'s
.100/ 65.7
.200/ 132.9
.300/ 194.7
.400/ 247.7
.500/ 281.1
.600/ 295.4
Exhaust #'s
.500/ 208
.600/ 222.7
My head porter stated he thought the heads were very nice as cast but was confident he could pick the low and high lift #'s up a bit with a slight clean up of the ports and blending the bowls(valve Job) in better. This work is being completed at the moment and I will post the results of his work.
On a side note I had a set of PRC's 2.5 heads flowed on the same bench not too long ago and the Darts flow #'s were very close to these despite having a 22.5 cc smaller intake port volume.
PRC's 2.5's
Intake #'s Exhaust #'s
.100/ 68 .100/ 52
.200/ 137 .200/ 137
.300/ 199 .300/ 199
.400/ 247 .400/ 179
.500/ 281 .500/ 207
.550/ 293 .600/ 220
.600/ 281
Btw the shop stated their flow bench is a little stingy on #'s.
Solid flow numbers on the as-cast Darts. Glad to see the PRC 2.5s are flowing more than the earlier versions. Both should make good power. Thanks for the report. BTW, what bore fixture were they flowed on? 3.900? 4.00?
__________________
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
2022 Cadillac Escalade 6.2L A10 S&B CAI, Corsa catback.
2023 Corvette 3LT Z51 soon to be modified.
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
2022 Cadillac Escalade 6.2L A10 S&B CAI, Corsa catback.
2023 Corvette 3LT Z51 soon to be modified.
Custom LSX tuning in person or via email press here.
I really think these Dart castings will be the way to go. I'm having PRC do me a set of stage 3 225's for my 408. These things look great in person, I can't belive what a great deal they are as compared to the more expensive aftermarket castings. I'm going to have my stage 3's flowed locally against a set of AFR 225's I have and a set of ETP 240's that are going on a customer's C5R based 427.
Thread Starter
Teching In
Joined: Jan 2005
Posts: 6
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From: Connecticut
3.900 inch bore. Hopefully he can find a little more out of the Darts as they are a little off the 205 AFR #'s but they should be great on my forged 346 setup!
Last edited by Steve Jester; Jan 23, 2006 at 08:26 PM.
Thread Starter
Teching In
Joined: Jan 2005
Posts: 6
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From: Connecticut
The Dart 205's come with 2.02/ 1.60 valves I believe. I will post again when they are flowed after clean up but for the price they are hard to beat in my opinion. Small ports/High velocity = great throttle response and drivability. $1400 + $200-300 for cleanup is a far cry from the $2200+ from other aftermarket heads. Im hoping they perform comparable to the AFR's. Only time will tell though as these heads still have not made it on any dyno's or motors yet to be proven.
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There was one recent dyno on CF with a relatively small cam. This was with cleaned up 225's, they weren't out of the box which is one of things I think a lot of people are waiting for. Car picked up almost 50 HP.
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Originally Posted by gomer
I really think these Dart castings will be the way to go. I'm having PRC do me a set of stage 3 225's for my 408. These things look great in person, I can't belive what a great deal they are as compared to the more expensive aftermarket castings. I'm going to have my stage 3's flowed locally against a set of AFR 225's I have and a set of ETP 240's that are going on a customer's C5R based 427.
Scott,
Be glad to flow these for you next time you are down.
Originally Posted by Gunnar@Patriot
Scott,
Be glad to flow these for you next time you are down.
Be glad to flow these for you next time you are down.
Originally Posted by Wet 1
G,
How long have you been waiting for the ET heads and what was the quoted t/a time?
How long have you been waiting for the ET heads and what was the quoted t/a time?
High flow numbers for a given engine combo is important. But keeping the air/fuel mixture from seperating during flow path and getting complete burn during combustion is just as or even more important.
Thread Starter
Teching In
Joined: Jan 2005
Posts: 6
Likes: 0
From: Connecticut
Slikvert,
I have not had a chance to speak with my head porter in the last two weeks but will in the next couple of days when I drop some more parts off for my motor. As soon as I get the new #'s I will post them. Sorry for keeping ya hanging! I just purchased a Fast 90/90 setup that I need him to port match to the heads. I hope this thing puts down some good #'s
I have not had a chance to speak with my head porter in the last two weeks but will in the next couple of days when I drop some more parts off for my motor. As soon as I get the new #'s I will post them. Sorry for keeping ya hanging! I just purchased a Fast 90/90 setup that I need him to port match to the heads. I hope this thing puts down some good #'s
Originally Posted by Steve Jester
Slikvert,
I have not had a chance to speak with my head porter in the last two weeks but will in the next couple of days when I drop some more parts off for my motor. As soon as I get the new #'s I will post them. Sorry for keeping ya hanging! I just purchased a Fast 90/90 setup that I need him to port match to the heads. I hope this thing puts down some good #'s
I have not had a chance to speak with my head porter in the last two weeks but will in the next couple of days when I drop some more parts off for my motor. As soon as I get the new #'s I will post them. Sorry for keeping ya hanging! I just purchased a Fast 90/90 setup that I need him to port match to the heads. I hope this thing puts down some good #'s
Ben T.