head swap hp numbers

nacho eater · 08-17-2005, 08:42 PM

Just got some preliminary numbers on the mule today. Just swapped heads to ported and polished ones with a baseline of 440 to the tire idle quality is great. Next is a custom cam swap should be able to get a lot more.500 to the tire? Quite possible..............

HEMMISSEY · 08-17-2005, 10:16 PM

baseline @ 440whp? now that is crazy! with just the heads only? no other mods... intake, headers and exhaust? And was this the GS motorsports head package? Dynograph? 5.7L or 6.1L?

5point7 · 08-18-2005, 12:34 AM

Cmon now nacho...gotta post some more info than that...need more info, and let's see some timeslips and before and after dyno's.

JP300c · 08-18-2005, 03:40 AM

yeah no kiddin...if that much power is to be had from headwork, cam, and intake/headers/exhaust....i'm soooooooo going that route come spring

jketron · 08-18-2005, 09:26 AM

Awesome, it is good to see someone going this route too. I'd love to this combo produce 500+ rwhp. I would adopt this into my setup..

jjs · 08-18-2005, 09:30 AM

Quote:

Originally Posted by HEMMISSEY

baseline @ 440whp? now that is crazy! with just the heads only? no other mods... intake, headers and exhaust? And was this the GS motorsports head package? Dynograph? 5.7L or 6.1L?

Looks like a 6.1...

KW suspension on Magnum

5point7 · 08-18-2005, 10:28 AM

I would say no way if it were a 5.7 with p&p heads only (and there are some guys out there that can do magic with heads), however...It think it will take heads, cam, intake and full exhaust along with a cracked code and a programmer to reach those numbers.

vvv90 · 08-18-2005, 11:12 AM

WOW! This is definitely the route I'm going insted of a supercharger some day.

nacho eater · 08-18-2005, 11:55 AM

Here are the details on the car........srt8 magnum with ported heads, Hennessey cold air induction, headers, cats, 1st resonator delete, and STOCK cam. We wanted to see just how good the stock cam would preform and from the testing it is a nice grind but our custom grind will for sure pick it up a lot more.The car made 368 bone stock and 390 prior to the head swap. We also have a set of heads that flow 20 cfm more than what is on this car now. I will post up the dyno sheets later. Anyone interested can contact Hennessey Performance 281-346-1370

cbutler32 · 08-18-2005, 11:58 AM

more info and...

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