Final word on dart heads
02-27-2006, 10:15 AM
#1
Final word on dart heads Hey guys I have been away for a while, and I was wondering what the verdict was on the new Dart heads. Does anyone have any flow #s in them in comparison to other heads(ie patriot, edelbrock, AFR) They are kinda ugly but damn that price is attractive. thanks.
02-27-2006, 11:39 PM
#3
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Originally Posted by Randy WS6
Im fixing to order a set of Precision Race component Stage III CNC Dart Heads with 2.100" int. & 1.60" ext. valves for a 4.030 bore from Texas Speed today
02-28-2006, 08:08 AM
#4
I have the as cast from TSP, the components are high quality and I disassembled and clean them up with some sandpaper rolls and hand sanding/polishing. The valves are drop forged and the PSI beehive springs have titanium retainers and machined locks. For the price, I don't think you can go wrong. There are vendors developing CNC programs for the heads, so if you have the as cast you could always pull them later and get them modified. At least that was the logic I used.
02-28-2006, 08:58 AM
#6
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Originally Posted by Randy WS6
Just ordered them they wee 1950.00 shipped and they said that they will have a flow sheet with them.Ill let you know when i get them
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03-01-2006, 06:25 PM
#9
Mine are setup at 1.750 installed height, with a seat pressure of 138#. They are rated for 0.625 lift, but I believe that is at an installed height of 1.800. They are a beehive design, and are nitrided to induce a surface state of compressive stress. Here are the specs on the springs:
Seat pressure: 120 @ 1.800
Open pressure: 360 @ 1.17
Coil bind: 1.1
Spring rate: 384
With an installed height of 1.750, I am 0.100 from coil bind. I don't know what the lift is on the TREX, but hopefully this will help. One other note, the valve train parts weigh in as follows:
Spring: 68 gms
Ti Retainer: 6 gms
Lock: 2 gms
2.05 Intake Valve: 98 gms
Exhaust Valve: 92 gms
Seat pressure: 120 @ 1.800
Open pressure: 360 @ 1.17
Coil bind: 1.1
Spring rate: 384
With an installed height of 1.750, I am 0.100 from coil bind. I don't know what the lift is on the TREX, but hopefully this will help. One other note, the valve train parts weigh in as follows:
Spring: 68 gms
Ti Retainer: 6 gms
Lock: 2 gms
2.05 Intake Valve: 98 gms
Exhaust Valve: 92 gms
03-01-2006, 07:07 PM
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Originally Posted by Randy WS6
The stage III Dart (PRC) come with .660 lift springs
Is that what you got? I didn't know if they were done with the stage III yet.
03-01-2006, 07:33 PM
#12
Yep, Just order a set of stage III yesterday from Texas Speed
here a link to the heads
http://www.texas-speed.com/shop/item...d=627&catid=40
here a link to the heads
http://www.texas-speed.com/shop/item...d=627&catid=40
Last edited by Randy WS6; 03-01-2006 at 07:44 PM.