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2008-2009 Racecraft Mustang For discussion of the 2008-09 Racecraft 420S Mustang. Owners of the 2007-08 "Sleeper GT" can also find help here.

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  #1  
Old 03-03-2012
Gearhead Gearhead is offline
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Default Max power

Any one know what our car's (420 s) max horsepower (safe) are able to put at wheel's, some tuner's are telling me 480-490 another is saying 530-550 on stock long block.
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Old 03-03-2012
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OneQwkStang OneQwkStang is offline
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There is no set max rwhp number, an engine could grenade at the stock HP. However most will stay at or under 500 rwhp while others will run above 500 rwhp. You will hear more guys grenading their engines above 500 rwhp then under 500 rwhp. A good tune and proper fuel is the key.
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Old 03-03-2012
Gearhead Gearhead is offline
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Thanks oneqwkstang
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Old 03-04-2012
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I wouldn't push past 480 to be safe, but like has been stated in the earlier post. You just never know.
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Old 03-12-2012
panohodges panohodges is offline
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I have an 09 420S. Its a convertible and it has the 475hp upgrade. It has a 3.4 pulley and I had it dynoed and retuned on Friday last week. It made 466rwhp and 454 lbs of torque. I am going to be upgrading to the gt500 dual fuel pumps in the next 2 weeks.
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Old 03-12-2012
panohodges panohodges is offline
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Here is the ustream link for the dyno.

Go to 28:32 in video to see the dyno pull

http://www.ustream.tv/channel/prodyno-dyno
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Old 03-12-2012
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OneQwkStang OneQwkStang is offline
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Don't think that video is of your Racecraft.
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Old 03-12-2012
panohodges panohodges is offline
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Your right...sorry it seems they changed the link when they added their next video.

This link should work:

http://www.ustream.tv/recorded/20987057
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Old 03-12-2012
panohodges panohodges is offline
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Dyno- video: It is 2009 not a 2008. We had my wife's car there too which is an 08. He must have added in the wrong year.

Last edited by panohodges; 03-13-2012 at 06:59 AM.
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