PRC/Dart 255 runner question
03-15-2006, 09:47 AM
#1
PRC/Dart 225 runner question Ok heres were Im confused, If the Dart head comes from Dart as a 225cc runner, then PRC ports them. They would no longer be a 225cc runner. Correct? It would be Im guessing around 245cc. Then why are they still being called PRC/Dart 225 just becasuse they start off as a 225?
Or are they taking a 205cc runners & making them 225cc? Can someone clarify?
Thanks
Or are they taking a 205cc runners & making them 225cc? Can someone clarify?
Thanks
Last edited by Z'mnypit; 03-16-2006 at 08:32 AM. Reason: mistyped
03-15-2006, 10:26 AM
#3
Im having a custom set of fully cnc ported (PRC) Dart Stage-III heads built with 2.100" int. & 1.60" ext. valves and 59cc chambers 250cc intake runners for a 4.030" bore aluminum LS2 418 ,I was told i should get the by the end of the month ,because Dart is behind on there orders, And Texas Speed said they would come with a flow sheet and ill post it up when i get the heads. Texas Speed told me that the stage III come in two differant runners 245cc & 255cc.after the cnc work.
I am looking for a next mod. How far behind is Dart on the orders?
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03-15-2006, 11:57 AM
#8
TSP shows Dart Stage 2 and Dart Stage 3. I don't see the runner anywhere.
Dart has a 205 and 225 rough casting.
I think the bare casting is around 200cc and then PRC ports it to 237cc for the Stage 2 and 245/255cc for the Stage 3.
Does that clarify?
Dart has a 205 and 225 rough casting.
I think the bare casting is around 200cc and then PRC ports it to 237cc for the Stage 2 and 245/255cc for the Stage 3.
Does that clarify?
03-15-2006, 11:58 AM
#9
Texas Speed told me today that there CNC program to cut my Dart stage III was 245cc or a 255cc and they were going to use the 255cc for my setup.dont know what the darts stage III come casted. maybe a 225cc and cut them to a 230cc or something i dont really know.
03-15-2006, 01:52 PM
#11
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I don't know my final intake runner volume, no data came with the heads, I'm guessing they are probably a 205 casting hogged out to a 225 intake runner if they are selling them as 225's, but who really knows. I should have had my set measured.
I'm just going to run 'em and cross my fingers they make the power I need.
I'm just going to run 'em and cross my fingers they make the power I need.
03-15-2006, 05:33 PM
#12
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Originally Posted by Orange Peel
I don't know my final intake runner volume, no data came with the heads, I'm guessing they are probably a 205 casting hogged out to a 225 intake runner if they are selling them as 225's, but who really knows. I should have had my set measured.
I'm just going to run 'em and cross my fingers they make the power I need.
I'm just going to run 'em and cross my fingers they make the power I need.
03-15-2006, 06:25 PM
#13
Originally Posted by Ksett
TSP had advertised them in another thread as a 237 intake runner that started out as a 205 before porting. I think these have proven to work well with larger cams, haven't seen results with small cams.
03-15-2006, 11:27 PM
#15
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Originally Posted by JakeFusion
TSP shows Dart Stage 2 and Dart Stage 3. I don't see the runner anywhere.
Dart has a 205 and 225 rough casting.
I think the bare casting is around 200cc and then PRC ports it to 237cc for the Stage 2 and 245/255cc for the Stage 3.
Does that clarify?
Dart has a 205 and 225 rough casting.
I think the bare casting is around 200cc and then PRC ports it to 237cc for the Stage 2 and 245/255cc for the Stage 3.
Does that clarify?
That is correct..
03-16-2006, 08:35 AM
#16
Originally Posted by JakeFusion
As I said before, TSP doesn't sell a PRC Dart 225. They sell the PRC Dart Stage 2 or 3. You can buy Dart 205s or 225s from them, but PRC hasn't touched them, hence the "as cast" moniker.
https://ls1tech.com/forums/generation-iii-internal-engine/467248-prc-stage-3-dart-225-flow-numbers-independent-test.html
Other than that. I understand now.
03-16-2006, 09:02 AM
#17
Originally Posted by Z'mnypit
Ok, so what are these then?
https://ls1tech.com/forums/showthread.php?t=467248
https://ls1tech.com/forums/showthread.php?t=467248
03-16-2006, 01:49 PM
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Originally Posted by JakeFusion
I'm not sure. If it's a PRC S3 ported Dart head with a 245cc runner and it only flows 313cfm, I'd look at AFR/ETP. However, if it's just the rough 225cc casting from Dart with new valves and a valve job, then the numbers are decent.
03-16-2006, 04:34 PM
#20
There are some CNC Ported Darts recently listed on the airflow thread. https://ls1tech.com/forums/generation-iii-internal-engine/317323-interesting-flow-data-long-thread.html
Don't know whose they are, but the runner volume is HUGE considering the flow numbers!
Don't know whose they are, but the runner volume is HUGE considering the flow numbers!
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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.