What's up with Dart 205s?
09-25-2006, 06:37 PM
#21
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well one reason for the small cams is that you dont have to fly cut and the second is bigger isnt always better compare my numbers with a stock ls6 intake compared to a bigger cam with a stock ls6 intake they dont have much more hp or tq look at sigforty's numbers there is a 8 hp difference in our numbers and i put down more tq its all about matching your components to work with eachother
09-26-2006, 09:35 PM
#23
Originally Posted by N4cer
Why all the small cams with these heads? I don't get it.
It's easier on the wallet to not change cams every 5 minutes when something bigger comes out, and the darts are the easiest on the wallet for aftermarket castings. That could be part of the reason you're seeing these combos popping up. Just my 2 cents.
09-26-2006, 10:01 PM
#24
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I'm going to be running Darts with my small 221/221 which may be upgraded to small 230/224. I want good power, but don't want to have to compromise too much drivability with a big cam. I'll make all of the power that a big cam would make, but do so more streetable with baby cam + cheap heads.
I've VERY curious to see some TR230/224 & Dart 205 results.
Ben T.
I've VERY curious to see some TR230/224 & Dart 205 results.
Ben T.
Last edited by Studytime; 09-26-2006 at 10:11 PM.
09-27-2006, 09:53 AM
#28
Originally Posted by sprydncamd ta
well one reason for the small cams is that you dont have to fly cut and the second is bigger isnt always better
09-27-2006, 10:31 AM
#30
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I don't think that's really relevant. You are correct it was designed as a max-effort stock-heads cam, but that's not to say it will not pick up more power with a good set of heads. I don't see how anyone could say increased head flow would make less power. WTH?
The TRex although optimal for a stock LS1, will not be the absolute PERFECT cam for a LS1 with heads, but it'll make way more power than a cam-only LS1.
Ben T.
The TRex although optimal for a stock LS1, will not be the absolute PERFECT cam for a LS1 with heads, but it'll make way more power than a cam-only LS1.
Ben T.
09-27-2006, 11:12 AM
#32
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Originally Posted by quiet_storm98
this is so true..i know a guy running a t-rex with aftermarket heads and his car barely runs 11's, it is all stripped down too. Yet my buddy who sold me his little cam (228/229 cam) had aftermarket heads and his car was at full weight yet it ran low 11's so a big cam isn't always better
09-27-2006, 02:02 PM
#34
the reason i used the t-rex as an example is because it is one of the biggest cams you can get and even though it is great in cam only cars i am just showing that a Huge cam isn't always needed..as a matter of fact i have seen lots of people with heads and somewhat small cams usually run about equal or quicker then people with heads and big cams, sure the big cams may make more power on the dyno but when you look at track times they aren't much quicker then the people running smaller cams.
09-27-2006, 02:03 PM
#35
oh yeah here is some info i got from dart331stroker in a pm about the cnc dart heads
The CNC Program is not actually for the 205 or the 225 heads. It will be a casting we make for the CNC machining specific. What we do is take the tool for the 205 heads, file the cores, this will make the ports smaller when cast. We then take this to our pattern shop where we make a new intake and exhaust core for the current core box. This allows the porting to be much better as when you try to cnc the as cast heads you end up cleaning alot of areas up by hand which just increases the port volume and in alot of cases hurts the heads.
Our goal is to have this ready for the PRI trade show in Orlando Florida come December, however it might get shoved back for awhile???
I will keep this board posted on information.
The CNC Program is not actually for the 205 or the 225 heads. It will be a casting we make for the CNC machining specific. What we do is take the tool for the 205 heads, file the cores, this will make the ports smaller when cast. We then take this to our pattern shop where we make a new intake and exhaust core for the current core box. This allows the porting to be much better as when you try to cnc the as cast heads you end up cleaning alot of areas up by hand which just increases the port volume and in alot of cases hurts the heads.
Our goal is to have this ready for the PRI trade show in Orlando Florida come December, however it might get shoved back for awhile???
I will keep this board posted on information.
09-28-2006, 02:55 AM
#36
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well i know this is a dart 205 thread but there arent many positive dart threads as you stated when you started the thread. i decided to run dart 225's on my 403 because of this vary subject, i just couldnt find any data with the dart 225 + 402/403/408 as a combo. i picked my heads up used 1200 miles on them for 1k. from a friend that had them hand ported, cleaned up a little bit by bob at precision porting and coatings. he just cleaned them up a little bit they flowed 308@.600 im running a 238/.608 lift 112 cam which i think will work out great with these heads, ported LS2 tb and ported fast 90. the car will be done saturday, im pretty excited about it. ill post my numbers up when they are available.
these heads on his 346 made 442/414 6spd C5 with a 230 112 cam
those 205's you posted flow numbers on are pretty impressive, whatever they did before they sent them back to you is amazing. my buddy has another set of darts on his car right now that were ported by dart. he is working with them on some R&D with these top secret heads, he wouldnt tell me zip.
these heads on his 346 made 442/414 6spd C5 with a 230 112 cam
those 205's you posted flow numbers on are pretty impressive, whatever they did before they sent them back to you is amazing. my buddy has another set of darts on his car right now that were ported by dart. he is working with them on some R&D with these top secret heads, he wouldnt tell me zip.
09-29-2006, 05:27 AM
#40
Get the heads first and then the Jesel's. I looked at the Jesels when I had my Darts off the car. It was recommended that you elongate the pushrod holes 0.125" (for stock heads) for the Jesels. I couldn't see any way to do that on the Darts without some heavy machine work so I went with the Crane rockers instead. I have one of the earlier sets of Dart heads, maybe this isn't really necessary but look into it before spending the money on the rockers to be sure they don't require heroic efforts to get them in. I would be very interested in how you make out with them.