Valve float....
TECH Addict
Joined: Apr 2002
Posts: 2,417
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From: Waldwick, NJ
Re: Valve float.... 8000 miles and only 3 runs at the track, 2 times with me where I broke 100 mphs and 1 time with my GF who went about 95mph, other than that my car is babied, I want her to last a long time, but still be fast....Occasionally I take some hard launches
Thread Starter
Staging Lane
Joined: Aug 2002
Posts: 54
Likes: 0
From: Long Island NY
Re: Valve float.... </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by mrb00formula:
<strong> DURS96TA and 2002 Trans Am..
There doesn't appear to be problems with your valve springs, however- the same can't be said about the dyno:
https://ls1tech.com/ubb/ultimatebb.p...;f=12;t=000964
A free Dyno Day shouldn't end up costing $650 or $450.. especially if the work isn't necessary.
Any rebuttals from Dave or TechHombre?? </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">I haven't posted my dyno sheet yet. It is different from 2002 Trans Am's dyno sheet. Please stop fueling the fire here. Nobody is saying that they're doing anything wrong. I'm just curious about my problem.
<strong> DURS96TA and 2002 Trans Am..
There doesn't appear to be problems with your valve springs, however- the same can't be said about the dyno:
https://ls1tech.com/ubb/ultimatebb.p...;f=12;t=000964
A free Dyno Day shouldn't end up costing $650 or $450.. especially if the work isn't necessary.
Any rebuttals from Dave or TechHombre?? </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">I haven't posted my dyno sheet yet. It is different from 2002 Trans Am's dyno sheet. Please stop fueling the fire here. Nobody is saying that they're doing anything wrong. I'm just curious about my problem.
Re: Valve float.... </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Durs96TA:
<strong> </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by mrb00formula:
<strong> DURS96TA and 2002 Trans Am..
There doesn't appear to be problems with your valve springs, however- the same can't be said about the dyno:
https://ls1tech.com/ubb/ultimatebb.p...;f=12;t=000964
A free Dyno Day shouldn't end up costing $650 or $450.. especially if the work isn't necessary.
Any rebuttals from Dave or TechHombre?? </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Please stop fueling the fire here.</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Yeah really....talk about stirring the pot. <img border="0" title="" alt="[Roll Eyes]" src="images/icons/rolleyes.gif" />
<strong> </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by mrb00formula:
<strong> DURS96TA and 2002 Trans Am..
There doesn't appear to be problems with your valve springs, however- the same can't be said about the dyno:
https://ls1tech.com/ubb/ultimatebb.p...;f=12;t=000964
A free Dyno Day shouldn't end up costing $650 or $450.. especially if the work isn't necessary.
Any rebuttals from Dave or TechHombre?? </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Please stop fueling the fire here.</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Yeah really....talk about stirring the pot. <img border="0" title="" alt="[Roll Eyes]" src="images/icons/rolleyes.gif" />
Re: Valve float.... </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Yeah really....talk about stirring the pot. <img border="0" title="" alt="[Roll Eyes]" src="images/icons/rolleyes.gif" /> [/QB]</font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Marc,
Like you've never "shined the harsh light of reality" before! <img border="0" alt="[bullshit]" title="" src="graemlins/gr_bs.gif" />
You've stirred more pots (here & LS1.com) then I have.. but it's different when it's your favorite pot!
Here's one for you:
"Let he that is without sin cast the first stone"
I won't comment further..
Like you've never "shined the harsh light of reality" before! <img border="0" alt="[bullshit]" title="" src="graemlins/gr_bs.gif" />
You've stirred more pots (here & LS1.com) then I have.. but it's different when it's your favorite pot!
Here's one for you:
"Let he that is without sin cast the first stone"
I won't comment further..
Re: Valve float.... Yeah, in the past I've done my fair share of talking, but I've NEVER gone after a particular person or shop with the vehemence you seem to be doing here on THREE DIFFERENT THREADS!
You seem to really have it in for the shop in question and won't stop until you make some kind of unsubstantiated point against them.
You get yourself a decent dyno sheet on a budget and all of a sudden everyone else sucks? <img border="0" title="" alt="[Confused]" src="images/icons/confused.gif" /> Nice attitude.
See ya on the dragstrip. <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />
You seem to really have it in for the shop in question and won't stop until you make some kind of unsubstantiated point against them.
You get yourself a decent dyno sheet on a budget and all of a sudden everyone else sucks? <img border="0" title="" alt="[Confused]" src="images/icons/confused.gif" /> Nice attitude.
See ya on the dragstrip. <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />
Re: Valve float.... Does this show any indication of valve float? My car did let out smoke after they let off of it on the dyno. My dyno sheet
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Verdad Gallardo Re: Valve float.... </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by mrb00formula:
<strong> Appearance is everything, Marc.
Appearance is often reality.. <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" /> </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">True....and that includes timeslips too Bob. <img border="0" alt="[jester]" title="" src="graemlins/gr_jest.gif" />
<strong> Appearance is everything, Marc.
Appearance is often reality.. <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" /> </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">True....and that includes timeslips too Bob. <img border="0" alt="[jester]" title="" src="graemlins/gr_jest.gif" />
TECH Addict
Joined: Dec 2001
Posts: 2,298
Likes: 2
From: new england
Re: Valve float.... That jagged look to graph is caused by how smooth you bring car up to speed on rollers. I ran into that on my first pull because some guy told me i could go right from 1st to 4th gear! Car and rollers seemed to chatter thru the hole pull. I went smoothly thru each gear on remaining runs and jagged lines went away. <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />
TECH Apprentice
Joined: Nov 2001
Posts: 369
Likes: 0
From: NJ
Re: Valve float.... gm has notoriously used "weak" valve springs for 2 basic reasons, fuel economy, lower tension springs cause less rotational friction which increases economy. the second reason is warranty lighter spring will lose their tension quicker and lessen the useable RPM will lessen the RPM related failures. i'll get the actual spring rates tomorrow and post them here
Jay
Jay
Re: Valve float.... Regarding the valve spring question;
Where is the name of the shop on the dyno?
<img src="http://images.cardomain.com/installs/254000-254999/254692_42_full.jpg" alt=" - " />
Where is the name of the shop on the dyno?
<img src="http://images.cardomain.com/installs/254000-254999/254692_42_full.jpg" alt=" - " />
Re: Valve float.... </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by chikn:
<strong> Are you going to the same dyno as this guy?
https://ls1tech.com/ubb/ultimatebb.p...c;f=1;t=010489
2 dyno valve float deals in 1 day <img border="0" title="" alt="[Roll Eyes]" src="images/icons/rolleyes.gif" /> </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Me thinks 2002 Trans Am and Durs96TA both went to the same dyno.
<strong> Are you going to the same dyno as this guy?
https://ls1tech.com/ubb/ultimatebb.p...c;f=1;t=010489
2 dyno valve float deals in 1 day <img border="0" title="" alt="[Roll Eyes]" src="images/icons/rolleyes.gif" /> </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Me thinks 2002 Trans Am and Durs96TA both went to the same dyno.
Thread Starter
Staging Lane
Joined: Aug 2002
Posts: 54
Likes: 0
From: Long Island NY
Re: Valve float.... </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by JayLS1-327:
<strong> Dave, I would take the car to another shop and have it re-dynoed to see if they come up with the same diagnosis. </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Yeah, I'm most likely going to do that. Just to clarify: I am saying nothing bad here about the shop I went to. I have heard nothing but good things about them. I just want a second opinion. I am not bashing them in ANY way.
<strong> Dave, I would take the car to another shop and have it re-dynoed to see if they come up with the same diagnosis. </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Yeah, I'm most likely going to do that. Just to clarify: I am saying nothing bad here about the shop I went to. I have heard nothing but good things about them. I just want a second opinion. I am not bashing them in ANY way.
Re: Valve float.... If your dyno sheet looks like the one posted, then the shop is completely wrong. That dyno shows absolutely no signs of valve float. Looks like someone wants to make some cash on valvespring swaps! Especially if your car is an 02, which has the valvesprings shimmed an extra .020" to increase the load, they shouldn't be floating. I've only seen a few isolated incidents where a stock motored car had valve float issues at stock rpms. I'll have to see if I can dig through my dyno sheets to see if I have one saved from a car with floating valves.
Brad
Brad