17 Rear Wheel HP from Muffler only
Thread Starter
Joined: Feb 2002
Posts: 757
Likes: 0
From: (760) Phelan Ca.
17 Rear Wheel HP from Muffler only I went to the dyno today with the complete stock exhuast only mods done to car are Lid and that is it.With lid and stock exhuast and mean detonation in put down 314.2 hp and 335.9 torque.The first pull with stock air filter removed it only made 307.4 hp and 330.1 torque.And at the time of dyno it was 80.2 F outside.Now only changes made were 3 1/2gallons of 103 oct fuel in with 1/4 of 91 oct and 3inch bullet muffler with turn down in front of the rear axle it made 331.1hp and 348.6 torque and it was still detonating and the water temp was 226.Not bad for just a muffler.And it was 91.3 F outside during these runs.
Thread Starter
Joined: Feb 2002
Posts: 757
Likes: 0
From: (760) Phelan Ca.
Re: 17 Rear Wheel HP from Muffler only I did that last night and it still detonated today.Even reset the pcm.
<small>[ September 22, 2002, 01:03 AM: Message edited by: Nine Finger 02 Z28 ]</small>
<small>[ September 22, 2002, 01:03 AM: Message edited by: Nine Finger 02 Z28 ]</small>
Thread Starter
Joined: Feb 2002
Posts: 757
Likes: 0
From: (760) Phelan Ca.
Re: 17 Rear Wheel HP from Muffler only </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Chris ARE 360:
<strong>Are you running ported MAF ends?
Cheers,
Chris
ps- your numbers are nice <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" /> </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">No stock mass air descreened.Thank you Chris.I was happy considering it was 91F outside and my water temp was 226 on the dyno.
<small>[ September 22, 2002, 11:32 AM: Message edited by: Nine Finger 02 Z28 ]</small>
<strong>Are you running ported MAF ends?
Cheers,
Chris
ps- your numbers are nice <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" /> </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">No stock mass air descreened.Thank you Chris.I was happy considering it was 91F outside and my water temp was 226 on the dyno.
<small>[ September 22, 2002, 11:32 AM: Message edited by: Nine Finger 02 Z28 ]</small>
TECH Fanatic
Joined: Aug 2002
Posts: 1,566
Likes: 0
From: Objects in mirror no longer matter.
Re: 17 Rear Wheel HP from Muffler only You can also try to cure any oil consumption that could be causing detonation. Try a catchcan with an inline filter or the like. Also, Royal Purple's Purple Ice lowered radiator temps on my car about 10 degrees and is worth a try.
Trending Topics
Thread Starter
Joined: Feb 2002
Posts: 757
Likes: 0
From: (760) Phelan Ca.
Re: 17 Rear Wheel HP from Muffler only The car has 10k miles on it and so far no sign of any oil usage.I do need to do something about the operating temps.It not that it is over heating it is just running to hot.On the stock gage it was reading 210 straight up and on the AutoTap it said 226.Which one would you trust?
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo
Re: 17 Rear Wheel HP from Muffler only From this description it sounds like the
order of business is to eliminate the
knock. That water temp is way too high.
Probably want to force the fans to run
(fan switch or setpoint software edit).
Running them full time will let you see
what your thermostat is really doing.
Race gas is not something you should need
on a stock compression engine unless you
have either excessive operating temps or
maybe some carbon buildup (oil consumption)
or a lean mixture imbalance (injector fouling /
age) that instigates premature ignition.
You know, they make some fairly large add-on
"pusher" fans that would easily fit inside
our nose areas. These could be run off any
kind of thermostatic or switch control, and
have nothing at all to do with the computer.
I've never seen any mention of people adding
these, but it seems like the simplest (in terms
of interactions w/ software and need to mess
with factory wiring) way to push down radiator
temperatures. I picked up an 18" one for one
of my other cars.
Anybody ever go this way? Seems like an idea.
order of business is to eliminate the
knock. That water temp is way too high.
Probably want to force the fans to run
(fan switch or setpoint software edit).
Running them full time will let you see
what your thermostat is really doing.
Race gas is not something you should need
on a stock compression engine unless you
have either excessive operating temps or
maybe some carbon buildup (oil consumption)
or a lean mixture imbalance (injector fouling /
age) that instigates premature ignition.
You know, they make some fairly large add-on
"pusher" fans that would easily fit inside
our nose areas. These could be run off any
kind of thermostatic or switch control, and
have nothing at all to do with the computer.
I've never seen any mention of people adding
these, but it seems like the simplest (in terms
of interactions w/ software and need to mess
with factory wiring) way to push down radiator
temperatures. I picked up an 18" one for one
of my other cars.
Anybody ever go this way? Seems like an idea.
TECH Enthusiast
Joined: Jul 2002
Posts: 618
Likes: 0
From: Pensacola, FL
Re: 17 Rear Wheel HP from Muffler only FWIW...
Anytime you do the thermostat mod, TB bypass, or ANYTHING that might spill out coolant, you MUST properly 'burp' the cooling system. If you don't the air bubbles will rise to the combustion chambers on our engines. I am sure you know that the combustion chamber is the absolute hottest part of an engine and if not cooled properly detonation/preignition is one side effect.
Dave
Anytime you do the thermostat mod, TB bypass, or ANYTHING that might spill out coolant, you MUST properly 'burp' the cooling system. If you don't the air bubbles will rise to the combustion chambers on our engines. I am sure you know that the combustion chamber is the absolute hottest part of an engine and if not cooled properly detonation/preignition is one side effect.
Dave