lt1 dart heads
06-02-2007, 08:51 PM
#21
The Dart heads are legit but I wouldn't bank on the release date. If this add is for real, Brodix beat Dart to the punch....
http://www.mbeperformance.com/brodix...ead-p-206.html
http://www.mbeperformance.com/brodix...ead-p-206.html
06-02-2007, 10:52 PM
#24
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Looks good but damn over $600 just to have the chambers milled down to 58c which is still a little big for me. They seem great and i would love to try them if i was building a bigger cube or FI motor. Oh well maybe someone will try them with 58cc chambers What kinda of compression would that create anyway
06-03-2007, 05:26 PM
#25
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Originally Posted by 95FbFormula
Looks good but damn over $600 just to have the chambers milled down to 58c which is still a little big for me. They seem great and i would love to try them if i was building a bigger cube or FI motor. Oh well maybe someone will try them with 58cc chambers What kinda of compression would that create anyway
06-03-2007, 06:12 PM
#26
I didn't see the $600 premium for milling the heads to 58cc's when I looked at these before but that's straight up highway robbery. A decent machine shop shouldn't charge more than $150 for that service.
06-03-2007, 06:18 PM
#28
Originally Posted by seawolf06
Do you think they just stole the AFR head design?
My initial impression of these heads is that you're giving up out of the box flow, for more porting potential.
Last edited by thesoundandthefury; 06-03-2007 at 06:23 PM.
06-03-2007, 07:57 PM
#30
I do not see the $600 for milling, where does it say that?
Far as chamber sizes I think basically all "LT1-LT4" aftermarket heads are tweaked gen 1 heads, just minimum changes for the reverse flow cooling. Remember 64-76cc is common for street gen 1 heads.
Also to warrant aftermarket castings on an LT1 you are probaly building a nasty stroker and in that case a bigger chamber with a flat top piston instead of a dish would be a good thing instead of using a dish to get the compression you want.
Far as chamber sizes I think basically all "LT1-LT4" aftermarket heads are tweaked gen 1 heads, just minimum changes for the reverse flow cooling. Remember 64-76cc is common for street gen 1 heads.
Also to warrant aftermarket castings on an LT1 you are probaly building a nasty stroker and in that case a bigger chamber with a flat top piston instead of a dish would be a good thing instead of using a dish to get the compression you want.
06-03-2007, 11:15 PM
#31
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This is one with the 68cc chambers notice were it says as cast.
LT1010002 Bare, pr 200 AP 2.05/1.60 N/A As Cast $1,099.00 Yes
This is the one will cnc milling of the chambers
LT1011008C Bare, pr 200 AP 2.05/1.60 1.550D CNC $1,775.00 Yes
These are both bare heads.
Something that seems strange to me is the last 2 listed 1 assembled with a 1.4 spring diameter is the same price as the 1 i listed bare with cnc and a 1.55 SD.
Maybe a misprint.
Also considering the cost plus having them ported couldn't you just have a set of 18* heads converted to RF cooling or would you run into further problems.
LT1010002 Bare, pr 200 AP 2.05/1.60 N/A As Cast $1,099.00 Yes
This is the one will cnc milling of the chambers
LT1011008C Bare, pr 200 AP 2.05/1.60 1.550D CNC $1,775.00 Yes
These are both bare heads.
Something that seems strange to me is the last 2 listed 1 assembled with a 1.4 spring diameter is the same price as the 1 i listed bare with cnc and a 1.55 SD.
Maybe a misprint.
Also considering the cost plus having them ported couldn't you just have a set of 18* heads converted to RF cooling or would you run into further problems.
Last edited by 95FbFormula; 06-03-2007 at 11:23 PM.
06-04-2007, 12:12 AM
#32
Originally Posted by 96capricemgr
Also to warrant aftermarket castings on an LT1 you are probaly building a nasty stroker and in that case a bigger chamber with a flat top piston instead of a dish would be a good thing instead of using a dish to get the compression you want.
Pop ups are not as efficent as flat tops but the trade off is higher compresion.
THIS is one of the very reasons I still use stock castings and 54cc cambers. Lord Knows it does not make any power. then again I have more TQ then most where it counts
what good is it to get all that air in the cylinders if you do not use it correctly when you get it there
Like I said and you mentioned old school thought and exicution on the last edition of the SBC as we knew it.
06-04-2007, 12:17 AM
#33
Originally Posted by 95FbFormula
Also considering the cost plus having them ported couldn't you just have a set of 18* heads converted to RF cooling or would you run into further problems.
Then again many times you are doing that any way so there is not alot more involved except for good set up. with so many run singal plane intakes it again evens costs.
over all a good 15/18 setup is not a ton more expensive then a top notch 23* setup and can make more power
