How hard can you push the manual,4.6 3V?
04-24-2013, 03:26 PM
#21
4th Gear Member
Join Date: Sep 2011
Posts: 1,226
04-24-2013, 08:25 PM
#23
Yeah, that's my car. It was shut down at 6k rpms every time, which furthers the "RPMs kill" argument. The last # was 819, and that was due to running out of fuel pressure (there were some issues with the fuel pumps and the injectors were only 60LB).
It may never have a 1/4 time, it was built for standing mile trap speed (should see WOT into 6th). Will probably do some road course on reduced boost also.
On the overlap cams, I would think that the fact that the exhaust and intake are open would also limit the positive pressure in the cylinder.
It may never have a 1/4 time, it was built for standing mile trap speed (should see WOT into 6th). Will probably do some road course on reduced boost also.
On the overlap cams, I would think that the fact that the exhaust and intake are open would also limit the positive pressure in the cylinder.
04-25-2013, 11:07 AM
#24
Multi-Tasking Moderator!
Join Date: Nov 2006
Location: Detroit Rock City!
Posts: 15,618
There's a thread (with video) on S197forum where a shop tried to blow up a stock 3V before installing the customer's built motor. On twin turbos and race fuel, I think they gave up trying to blow it up on the dyno after around 8 or 9 pulls and making something ridiculous like 7-800rwhp. Your mileage may vary, but the point is, it's all in the tune.
Yeah, that's my car. It was shut down at 6k rpms every time, which furthers the "RPMs kill" argument. The last # was 819, and that was due to running out of fuel pressure (there were some issues with the fuel pumps and the injectors were only 60LB).
It may never have a 1/4 time, it was built for standing mile trap speed (should see WOT into 6th). Will probably do some road course on reduced boost also.
It may never have a 1/4 time, it was built for standing mile trap speed (should see WOT into 6th). Will probably do some road course on reduced boost also.
great thread above and this thread is old!....
danzcool....yours maybe an exception but you prove that tuning means everything...
http://www.alternativeauto.com/Lidios_Rant.html
good article and my stang made 465RWHP with a safe tune on 93 octane with a max of 19 deg timing, 60# inj, and later added GT500 dual fuel pumps with about 11psi boost. She is still running strong today on the stock block with stock weak powdered rods etc...remember if one thing fails in the whole equation the motor can go boom!
04-25-2013, 02:30 PM
#25
Hello all,
First off I'm new to this forum and just purchased my first Ford Mustang. I've had the car for a few weeks now and have already added intake and exhaust. I have many more plans for my new baby. My question is......What can I get away with, power wise, before I need to build a stronger bottom end? I have a cai new throttle body, long tube headers, x-pipe, and exhaust. I want the frpp intake manifold, hot rod cams, and frpp stage 1 heads. Beyond that I don't know what the stock block can handle. Any pointers would be appreciated. Thanks in advance!
First off I'm new to this forum and just purchased my first Ford Mustang. I've had the car for a few weeks now and have already added intake and exhaust. I have many more plans for my new baby. My question is......What can I get away with, power wise, before I need to build a stronger bottom end? I have a cai new throttle body, long tube headers, x-pipe, and exhaust. I want the frpp intake manifold, hot rod cams, and frpp stage 1 heads. Beyond that I don't know what the stock block can handle. Any pointers would be appreciated. Thanks in advance!
04-25-2013, 08:11 PM
#26
6th Gear Member
Join Date: Feb 2007
Location: state of confusion
Posts: 7,635
Ford apparently feels that 6200 rpm is a safe enough limit for occasionally encountering it. This is most likely a fatigue limit, where Ford would have a design basis number of rev limit occurrences and engine revolutions per rev limit incident in mind.
The failure mode for the rods is tensile, but the reason that tension is developed in the rod is because the piston is undergoing tremendous negative (downward in the cylinder) acceleration as it passes through TDC. Meaning that although the piston only weighs about one pound, at 6200 rpm (and about 2500 g's) the rod thinks it weighs well over a ton.
Nothing that you do with a tune can improve the mechanical strength of the con rods or improve their fatigue life.
Norm
The failure mode for the rods is tensile, but the reason that tension is developed in the rod is because the piston is undergoing tremendous negative (downward in the cylinder) acceleration as it passes through TDC. Meaning that although the piston only weighs about one pound, at 6200 rpm (and about 2500 g's) the rod thinks it weighs well over a ton.
Nothing that you do with a tune can improve the mechanical strength of the con rods or improve their fatigue life.
Norm
Last edited by Norm Peterson; 04-25-2013 at 08:42 PM.
05-02-2013, 05:04 PM
#28
5th Gear Member
Join Date: Oct 2008
Location: CA
Posts: 2,073
