Dyno results
11-05-2007, 04:11 PM
#22
6th Gear Member
Join Date: Nov 2005
Location: Rochester, NY
Posts: 8,467
RE: Dyno results
ORIGINAL: r.barn
STP correction just means the dyno adjusted the numbers for current air temps and such.
365rwhp is not bad out of a 351W
Thats about 450hp at the flywheel. Decent power from a street 351 if you ask me.
I'm making about the same.
I would say your cam specs are what are holding you back more than the 1 3/4 LT's
Power adder cams always make an N/A sacrifice to get the most of the power adder.
STP correction just means the dyno adjusted the numbers for current air temps and such.
365rwhp is not bad out of a 351W
Thats about 450hp at the flywheel. Decent power from a street 351 if you ask me.
I'm making about the same.
I would say your cam specs are what are holding you back more than the 1 3/4 LT's
Power adder cams always make an N/A sacrifice to get the most of the power adder.
11-05-2007, 04:17 PM
#23
6th Gear Member
Join Date: May 2006
Location: earleville md
Posts: 10,357
RE: Dyno results
what are the cam specs?... and any clue as to what the spring specs are?
theres this other site i like to go onto for some really really good info... unfortuanitly if i try to post it here, its looks like this www.sbftech.com. hit me up on aim if you have it (disturbed26888)... theres a cam section there and the info is ****in awesome... camshaft inovations is who basically runs that small section on the forum. and jay knows his ****... hell surley be able to tell you if your cam is not good for ur motor, of if its your hold back... and ive never seen a bad review from someone who has a CI custom grind cam...
ive seen it said before, and the more i look at it the more i see it as tru... dont build the car for nitrous, build it N/A, and then spray it... unless it never runs on nitrous, which doesnt sound like your case... i was looking at "nitrous cams" but then realized... 60% of the time, ill be running n/a... and only spraying while at the track, or racing something that actually has *****...
i really suggest checking out the site im takling about... i wish i could post it here...
theres this other site i like to go onto for some really really good info... unfortuanitly if i try to post it here, its looks like this www.sbftech.com. hit me up on aim if you have it (disturbed26888)... theres a cam section there and the info is ****in awesome... camshaft inovations is who basically runs that small section on the forum. and jay knows his ****... hell surley be able to tell you if your cam is not good for ur motor, of if its your hold back... and ive never seen a bad review from someone who has a CI custom grind cam...
ive seen it said before, and the more i look at it the more i see it as tru... dont build the car for nitrous, build it N/A, and then spray it... unless it never runs on nitrous, which doesnt sound like your case... i was looking at "nitrous cams" but then realized... 60% of the time, ill be running n/a... and only spraying while at the track, or racing something that actually has *****...
i really suggest checking out the site im takling about... i wish i could post it here...
11-05-2007, 05:15 PM
#24
5th Gear Member
Thread Starter
Join Date: May 2007
Location: Warner Robins,GA
Posts: 2,872
RE: Dyno results
lift with 1.6 rockers is 588/622. I run 1.7 RR, that brings lift to 625/661. Duration @ .050 is 246/259. I have no idea about springs. It doesn't want to pull past 6200, and the tuner said with a mech. roller there should be more there and he suggested looking into springs also.
11-05-2007, 05:20 PM
#25
6th Gear Member
Join Date: Apr 2007
Location: California
Posts: 10,468
RE: Dyno results
Well, a couple of things. First if your header opening is SMALLER than the port on the head, and the header is actually occluding the port, that will kill an asston of power by blocking exhaust flow. It'll contaminate the cylinder since all the exhaust can't get out, and lower the volumetric efficiency of the motor all the way around. And secondly, it does sound like springs. Do you have a printout of the dyno? If so, what does the torque curve look like up high? If it's making good smooth torque and then around 6,000rpm torque suddenly starts to fall off radically, that definately says springs. I'm assuming you have larger fuel line, and if power dropped off from lack of fuel it woulda show on the afr.
11-05-2007, 05:48 PM
#26
4th Gear Member
Join Date: Oct 2006
Location: Kentucky
Posts: 1,460
RE: Dyno results
ORIGINAL: FASTBLACK
lift with 1.6 rockers is 588/622. I run 1.7 RR, that brings lift to 625/661. Duration @ .050 is 246/259. I have no idea about springs. It doesn't want to pull past 6200, and the tuner said with a mech. roller there should be more there and he suggested looking into springs also.
lift with 1.6 rockers is 588/622. I run 1.7 RR, that brings lift to 625/661. Duration @ .050 is 246/259. I have no idea about springs. It doesn't want to pull past 6200, and the tuner said with a mech. roller there should be more there and he suggested looking into springs also.
11-05-2007, 08:23 PM
#27
1st Gear Member
Join Date: Oct 2007
Posts: 74
RE: Dyno results
are you sure the headers are smaller than the port? because im running afr 205's with the upgraded exhaust ports that are 80cc and the exhaust gaskets i got to match the heads matched up to my headers,i hade sure everthing matched up so i wouldnt be tearing down **** later,im running 1 3/4 hooker longtubes
11-05-2007, 08:25 PM
#28
5th Gear Member
Thread Starter
Join Date: May 2007
Location: Warner Robins,GA
Posts: 2,872
RE: Dyno results
ORIGINAL: 67mustang302
Well, a couple of things. First if your header opening is SMALLER than the port on the head, and the header is actually occluding the port, that will kill an asston of power by blocking exhaust flow. It'll contaminate the cylinder since all the exhaust can't get out, and lower the volumetric efficiency of the motor all the way around. And secondly, it does sound like springs. Do you have a printout of the dyno? If so, what does the torque curve look like up high? If it's making good smooth torque and then around 6,000rpm torque suddenly starts to fall off radically, that definately says springs. I'm assuming you have larger fuel line, and if power dropped off from lack of fuel it woulda show on the afr.
Well, a couple of things. First if your header opening is SMALLER than the port on the head, and the header is actually occluding the port, that will kill an asston of power by blocking exhaust flow. It'll contaminate the cylinder since all the exhaust can't get out, and lower the volumetric efficiency of the motor all the way around. And secondly, it does sound like springs. Do you have a printout of the dyno? If so, what does the torque curve look like up high? If it's making good smooth torque and then around 6,000rpm torque suddenly starts to fall off radically, that definately says springs. I'm assuming you have larger fuel line, and if power dropped off from lack of fuel it woulda show on the afr.
SLOWBLACK FORMALLY KNOWN AS FASTBLACK
11-05-2007, 08:45 PM
#29
1st Gear Member
Join Date: Oct 2007
Posts: 74
RE: Dyno results
if the headers are to small u can port them out on the ends to match up, but i dont see how there to small,pull em and see wont take long and you will no for sure. its the spring man trust me leavethe cam,and change em and u will be a happy man
11-05-2007, 08:54 PM
#30
5th Gear Member
Thread Starter
Join Date: May 2007
Location: Warner Robins,GA
Posts: 2,872
RE: Dyno results
I am def doin the springs as you suggested, it just makes sense. I took engine out a few months ago to get it machined for a onepiece rear main. When i matched the header gasket to exhaust ports it line up perfect horizontilly but gasket was too small at the top of exhaust port. I measured it at the time, but have forgotten. The difference was pretty significant though. Thanks for all your help man. I do appreciate it.
Keith
Keith