Preliminary PRC Ported Dart Pics & Results!!-->
#1
Preliminary PRC Ported Dart Pics & Results!!-->
Well I finally got around to posting some quick pics of the latest version of our dart port we've been working on. The dart head seems to be a pretty nice setup once they get a little attention to detail The current version of the Precision Race Components port flows like this:
.300 204
.400 254
.500 292
.600 315
.650 319
The cool thing is these heads are setup for 3.905 bore!! Here's a few teaser pics for you guys to checkout!! I'll try to post flow info on the exhaust port in the next few days.
The head should setup with plenty of p/v for even the largest of camshafts & will feature a pretty small chamber also Feel free to ask any questions you may have!!
.300 204
.400 254
.500 292
.600 315
.650 319
The cool thing is these heads are setup for 3.905 bore!! Here's a few teaser pics for you guys to checkout!! I'll try to post flow info on the exhaust port in the next few days.
The head should setup with plenty of p/v for even the largest of camshafts & will feature a pretty small chamber also Feel free to ask any questions you may have!!
__________________
Jason
Co-Owner, Texas Speed & Performance, Ltd.
2005 Twin Turbo C6
404cid Stroker, 67mm Twins
994rwhp/902lb ft @ 22 psi (mustang dyno) www.Texas-Speed.com
Jason
Co-Owner, Texas Speed & Performance, Ltd.
2005 Twin Turbo C6
404cid Stroker, 67mm Twins
994rwhp/902lb ft @ 22 psi (mustang dyno) www.Texas-Speed.com
#7
They started life as a 225 Dart casting.
Off The Shelf ready to install Flow Info:
.300 196
.400 239
.500 276
.600 296
The port we are on right now is 229cc runner I haven't seen the 205 version of the head yet so I have no idea what they flow.
Off The Shelf ready to install Flow Info:
.300 196
.400 239
.500 276
.600 296
The port we are on right now is 229cc runner I haven't seen the 205 version of the head yet so I have no idea what they flow.
__________________
Jason
Co-Owner, Texas Speed & Performance, Ltd.
2005 Twin Turbo C6
404cid Stroker, 67mm Twins
994rwhp/902lb ft @ 22 psi (mustang dyno) www.Texas-Speed.com
Jason
Co-Owner, Texas Speed & Performance, Ltd.
2005 Twin Turbo C6
404cid Stroker, 67mm Twins
994rwhp/902lb ft @ 22 psi (mustang dyno) www.Texas-Speed.com
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#10
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15 degree - thick deck and factory valve angle
Dart Average flow: 277cfm
11 degree - and we all know 11 degree flows more by design
ET Heads average flow: 293 CFM
IMO that is pretty good for any casting. Why don't you guys start looking at the average data instead of the peak, peaks don't mean ****. Its the average cfm that matters. You would buy these heads over the LS1/6 because of the deck thickness. On the cars that are making serious this is a key design in keeping the heads down. I'm only running a 346 with a 150 shot and have signs of lifting the heads.
Phil
Dart Average flow: 277cfm
11 degree - and we all know 11 degree flows more by design
ET Heads average flow: 293 CFM
IMO that is pretty good for any casting. Why don't you guys start looking at the average data instead of the peak, peaks don't mean ****. Its the average cfm that matters. You would buy these heads over the LS1/6 because of the deck thickness. On the cars that are making serious this is a key design in keeping the heads down. I'm only running a 346 with a 150 shot and have signs of lifting the heads.
Phil
Last edited by Phil99vette; 11-11-2005 at 03:09 PM.
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Actually Phil, I have average flow at 266 cfm from .200-.600, thats the number that matters. To be brutally honest, there are no numbers anywhere in the lift range that are beyond a good stage 2 LS1 head. If you want to try and build a case for the thicker deck and/or better PTVC, then go ahead. I dont see it though, if I was building a high dollar engine and was worried about deck integrity, I would probably get the higher flowing head for alittle more $, that also has a thicker deck. BTW I started preaching average cfm numbers long before your post, so you arent telling me anything new. But as I am sure you are aware, it all depends on your lobe profile. Your time spent at .400-.650 would be greatly increased on a super agressive lobe, as opposed to a more friendly lobe like the XE.
Brandon
Brandon
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Brandon, these are just the first sets that're being played with. I have to say that I'd much rather these heads over any ported stockers, for anyone who's spraying a large shot you want the thicker deck height. Give it time, you'll see some impressive gains, but the real test will be on the track, and rollers.....
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Originally Posted by INVISIBLEZ
Brandon, these are just the first sets that're being played with. I have to say that I'd much rather these heads over any ported stockers, for anyone who's spraying a large shot you want the thicker deck height. Give it time, you'll see some impressive gains, but the real test will be on the track, and rollers.....
Brandon
BTW Mike, I got the LS1 castings popping 300 at .600 and 208 at .300
Valve job R&D is where its at.
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Originally Posted by xfactor_pitbulls
Yeah Mike, I dont doubt that one bit. Just stating that the dart casting isnt all that impressive. That was evident from Brian Tooley's post regarding the Trick flow heads versus AFR and Dart. Said dart wasnt even on the board. I would be more curious to see what the guys at PRC could do with a trick flow casting.
Brandon
BTW Mike, I got the LS1 castings popping 300 at .600 and 208 at .300
Valve job R&D is where its at.
Brandon
BTW Mike, I got the LS1 castings popping 300 at .600 and 208 at .300
Valve job R&D is where its at.
That's cool, glad you're doing good. I think alot of head porters with their outrageous prices will down the darts because of the pricing. I've always seen very good results from Dart heads. Oh and I'm not putting you in the above catagory, because god knows you barely charge above food stamps!!!!! Take care.
Mike
P.S. Remember we had this discussion about my GMPP LS6 heads, look @ what they did, it's not all in the lift #'s.
#16
We've been working on them a little bit more today Here's where they're at
.300 206
.400 259
.500 294
.600 320
.650 325
.300 206
.400 259
.500 294
.600 320
.650 325
__________________
Jason
Co-Owner, Texas Speed & Performance, Ltd.
2005 Twin Turbo C6
404cid Stroker, 67mm Twins
994rwhp/902lb ft @ 22 psi (mustang dyno) www.Texas-Speed.com
Jason
Co-Owner, Texas Speed & Performance, Ltd.
2005 Twin Turbo C6
404cid Stroker, 67mm Twins
994rwhp/902lb ft @ 22 psi (mustang dyno) www.Texas-Speed.com
#17
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Brandon,
Flow numbers win races right?
Problem is most LS castings go turbulent, i'd rather have better flow than more flow. From what I have seen of the Dart castings they don't have any turbulence in them.
You guys can look at average numbers or look at the port where it flows most of it's volume, in that reguard the numbers TSP post look good to me. Hell compare them to a LS6 head and these things are light years ahead of them.
Bret
Flow numbers win races right?
Problem is most LS castings go turbulent, i'd rather have better flow than more flow. From what I have seen of the Dart castings they don't have any turbulence in them.
You guys can look at average numbers or look at the port where it flows most of it's volume, in that reguard the numbers TSP post look good to me. Hell compare them to a LS6 head and these things are light years ahead of them.
Bret
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Originally Posted by Jason 98 TA
We've been working on them a little bit more today Here's where they're at
.300 206
.400 259
.500 294
.600 320
.650 325
.300 206
.400 259
.500 294
.600 320
.650 325
Jason, what are a set of these going to run finished, as you alls set will be??
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Originally Posted by SStrokerAce
Brandon,
Flow numbers win races right?
Problem is most LS castings go turbulent, i'd rather have better flow than more flow. From what I have seen of the Dart castings they don't have any turbulence in them.
You guys can look at average numbers or look at the port where it flows most of it's volume, in that reguard the numbers TSP post look good to me. Hell compare them to a LS6 head and these things are light years ahead of them.
Bret
Flow numbers win races right?
Problem is most LS castings go turbulent, i'd rather have better flow than more flow. From what I have seen of the Dart castings they don't have any turbulence in them.
You guys can look at average numbers or look at the port where it flows most of it's volume, in that reguard the numbers TSP post look good to me. Hell compare them to a LS6 head and these things are light years ahead of them.
Bret
Brandon