what is the highest hp for stock heads?
03-13-2006, 01:17 AM
#1
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what is the highest hp for stock heads? like said, stock unported heads, no spray. what is the highest hp anyone has made with any cam, and stock unported heads?
03-13-2006, 08:44 AM
#3
I only ran my Camaro once on a dyno, but after tuning it made 423 RWHP. Unported factory heads, intake, stock throttle body, and stock injectors. I finally got it to run 10.5's before I sold it. The cam was a Bullet with factory lift and 25?/26? duration. The motor also had Crane stamped steel replacement rockers.
Daren
Daren
03-13-2006, 10:08 AM
#4
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Originally Posted by GIZMO
I only ran my Camaro once on a dyno, but after tuning it made 423 RWHP. Unported factory heads, intake, stock throttle body, and stock injectors. I finally got it to run 10.5's before I sold it. The cam was a Bullet with factory lift and 25?/26? duration. The motor also had Crane stamped steel replacement rockers.
Daren
Daren
03-13-2006, 10:24 AM
#5
Sorry. I ran the car on B C Allens dyno here in Shelby about two years ago. He didn't have a working printer at that time. I was trying to get my A/F Ratio right and made a bunch of pulls (All day session). Learned a lot about Gen VII DFI that day!
Daren
Daren
03-13-2006, 10:46 AM
#6
I am assuming this wasnt an LT1. If it was, then I believe numbers are bogus. A 210cfm head isnt going to support that much rwhp. Most heads/cam cars (even with a large cam will make that power or slightly less). Factory LT1 heads stall between .450-.500 lift, so I am guessing your big cam was less than optimal anyway with such large duration.
Also, stock injectors wouldnt work out too well at that hp level.
Also, stock injectors wouldnt work out too well at that hp level.
03-13-2006, 10:51 AM
#7
Numbers aren't bogus he is in a stock eliminator type class, they have to use stock lift put can go with SR applications. You would not want to daily drive the car put it would make one hell of a track car.
You don't have to have heads to make power, but you do if you want to make streetable power. A big cam can make up for a lot.
You don't have to have heads to make power, but you do if you want to make streetable power. A big cam can make up for a lot.
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03-13-2006, 10:54 AM
#8
Originally Posted by T/A KID
Numbers aren't bogus he is in a stock eliminator type class, they have to use stock lift put can go with SR applications. You would not want to daily drive the car put it would make one hell of a track car.
You don't have to have heads to make power, but you do if you want to make streetable power. A big cam can make up for a lot.
You don't have to have heads to make power, but you do if you want to make streetable power. A big cam can make up for a lot.
I know dyno numbers can be wrong depending on how the dyno is calibrated. I wasnt saying he as lying, just that something wasnt right. I still find it hard to believe a stock as cast head will support that much power.
03-13-2006, 01:51 PM
#10
Originally Posted by RealQuick
I am assuming this wasnt an LT1. If it was, then I believe numbers are bogus. A 210cfm head isnt going to support that much rwhp. Most heads/cam cars (even with a large cam will make that power or slightly less). Factory LT1 heads stall between .450-.500 lift, so I am guessing your big cam was less than optimal anyway with such large duration.
Also, stock injectors wouldnt work out too well at that hp level.
Also, stock injectors wouldnt work out too well at that hp level.
Not bogus at all. LT1's work very well in Stock Eliminator trim. It just took a lot of time and money to get this far. Do the math. The car went 10.50 at 3280 lbs. As stated above the cam has factory lift as mandated by the rules. I would say that it is just about optimal for my set-up. The stock injectors work fine. Several cars that are faster than me are running 24 lb injectors. And yes the car would be awful for street driving!
Daren
03-13-2006, 05:53 PM
#13
Originally Posted by GIZMO
Not bogus at all. LT1's work very well in Stock Eliminator trim. It just took a lot of time and money to get this far. Do the math. The car went 10.50 at 3280 lbs. As stated above the cam has factory lift as mandated by the rules. I would say that it is just about optimal for my set-up. The stock injectors work fine. Several cars that are faster than me are running 24 lb injectors. And yes the car would be awful for street driving!
Daren
Daren
By the way, pass the towel so I can wipe the mud off my face...
03-13-2006, 06:17 PM
#14
Originally Posted by RealQuick
Damn Daren, sounds like a beast. Did you up your fuel pressure in order to retain the injectors? My injectors were maxxed at 383rwhp at stock fuel pressure...
By the way, pass the towel so I can wipe the mud off my face...
By the way, pass the towel so I can wipe the mud off my face...
I run my fuel pressure at 50 PSI and feed the fuel rails with 8-AN line and Aeromotive pump which is fed by a 10-AN line from the fuel cell. The return is a 6-AN. A good fuel system is the trick to running small injectors and keeping the fuel cool (now I've let out one of those Top Secret tricks!).
Take Care,
Daren
03-13-2006, 10:59 PM
#15
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I think i make right around 365rwhp with my setup, with has stock heads, intake, and throttle body. I trapped 113 and wiegh 3500lbs. but i have an aluminum flywheel and driveshaft, and 3.42's.
03-14-2006, 02:48 AM
#20
Well, not that I’ve seen it in person, but the stock heads flow around 230 on the intake, which works out to enough flow to make about 470-475hp at the crank, or about 375 at the wheels (20% loss) if everything else was optimized, so I don’t really see a problem with the claims made.
