Different brand LTx head flow #s
Thread Starter
Team Owner
Joined: Oct 2004
Posts: 81,241
Likes: 3,063
From: altered state
St. Jude Donor '05
Different brand LTx head flow #s
Looking for
-Edelbrock performer
-Dart 180 LT1
-Trick Flow (180?)-not te CNC version just the standardperformance head.
Can be stock or large size valve
Or other brands (except afr)
1-.200 lift through? Source?
Only interested in out of the box head #s no hand ported stuff.
-Edelbrock performer
-Dart 180 LT1
-Trick Flow (180?)-not te CNC version just the standardperformance head.
Can be stock or large size valve
Or other brands (except afr)
1-.200 lift through? Source?
Only interested in out of the box head #s no hand ported stuff.
Last edited by cv67; Dec 25, 2009 at 10:30 PM.
Le Mans Master
Joined: Feb 2000
Posts: 9,715
Likes: 27
From: Kempner Texas
Looking for
-Edelbrock performer
-Dart 180 LT1
-Trick Flow (180?)-not te CNC version just the standardperformance head.
Can be stock or large size valve
Or other brands (except afr)
1-.200 lift through? Source?
Only interested in out of the box head #s no hand ported stuff.
-Edelbrock performer
-Dart 180 LT1
-Trick Flow (180?)-not te CNC version just the standardperformance head.
Can be stock or large size valve
Or other brands (except afr)
1-.200 lift through? Source?
Only interested in out of the box head #s no hand ported stuff.
I've got flow numbers from a few different sites/mags and Dart. They're all available online.
GMHTP built an engine using them a posted the flow numbers. TF has their version on their site. There are a few other sources I tracked down as I was researching my choice. What else do you want to know?
Jake
West Point ROCKS! Nation's TOP COLLEGE per Forbes Magazine!! Graduation Day Parade 20 May 2010!!!
Last edited by JAKE; Dec 26, 2009 at 01:00 AM.
Race Director
Joined: Nov 2003
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From: Overland Park Kansas
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LT1 Performer numbers are on this page:
http://www.edelbrock.com/automotive_...erformer.shtml
and LT4 RPMExtreme on this page:
http://www.edelbrock.com/automotive_...pmxtreme.shtml
The only think I see on Dart Pro1 Platinum 180cc LT1 heads is:
257cfm at .500" intake
172cfm at .500" exhaust
(Source spec sheets on this page:
http://www.dartheads.com/product_specifications.php)
I couldn't find flow date for the LT1 head on TrickFlow's site. SBCGen1 is on there but I don't see LTx flow data.
http://www.edelbrock.com/automotive_...erformer.shtml
and LT4 RPMExtreme on this page:
http://www.edelbrock.com/automotive_...pmxtreme.shtml
The only think I see on Dart Pro1 Platinum 180cc LT1 heads is:
257cfm at .500" intake
172cfm at .500" exhaust
(Source spec sheets on this page:
http://www.dartheads.com/product_specifications.php)
I couldn't find flow date for the LT1 head on TrickFlow's site. SBCGen1 is on there but I don't see LTx flow data.
Last edited by GREGGPENN; Dec 26, 2009 at 11:35 PM.
Thread Starter
Team Owner
Joined: Oct 2004
Posts: 81,241
Likes: 3,063
From: altered state
St. Jude Donor '05
I asked because I finished porting a set of LT1 heads with stock (small) valves, stock valve job and was curious. didnt bother using afr as a comparison as they would kill them.
These did for the most part better than the Edelbrocks hands down. Only 1 lift # on the exhaust was more on teh bigger valved Eddys, everywhere else the GM was more.
Too bad, Edelbrock has always made a nice casting but their numbers have always been crap.
Dart intake was more, GM intake was neck and neck
Trick Flow or other brands dont know.
pretty happy so far being as the porting was very conservative, still more to be had but the motor its going on is a mild build focused around torque.
Makes me wonder if paying $ for bigger valves, etc is a waste when you can get practically the same # from stock valve size unless its an "all out" job.
These did for the most part better than the Edelbrocks hands down. Only 1 lift # on the exhaust was more on teh bigger valved Eddys, everywhere else the GM was more.
Too bad, Edelbrock has always made a nice casting but their numbers have always been crap.Dart intake was more, GM intake was neck and neck
Trick Flow or other brands dont know.
pretty happy so far being as the porting was very conservative, still more to be had but the motor its going on is a mild build focused around torque.
Makes me wonder if paying $ for bigger valves, etc is a waste when you can get practically the same # from stock valve size unless its an "all out" job.
Last edited by cv67; Dec 27, 2009 at 11:16 AM.
Thread Starter
Team Owner
Joined: Oct 2004
Posts: 81,241
Likes: 3,063
From: altered state
St. Jude Donor '05
Intake at .4-600 was stronger on the Eddys extreme LT4 all other numbers are close, some more some less.
Come on, Edelbrock.
Come on, Edelbrock.
and LT4 RPMExtreme on this page:
http://www.edelbrock.com/automotive_...pmxtreme.shtml
http://www.edelbrock.com/automotive_...pmxtreme.shtml
