Hi..

A friend of mine have a problem with his GTA -88 any guess whats causing it?

* When the car is cold it has much more power at upper rpms than when its warm.

* If you drive rughly for about 30 min the car feels strong even when its warm. But next day its the same thing again.

Thanks/N.



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GTA -89:Free flow muffler,dual 3" HF cats, Edelbrock headers, Vette heads, 1.52 RR 7/16, ZZ-9 cam, Big Mouth, AS&M LTR, !plenum, 52 TB, MSD 6AL, TPIS level V prom, Superior shift-kit and all the minor mods, a Canfield headed 383 in the works!! ready May 2001...
http://www.itv.se/tacs/members_cars/m279/m279.html (Swedish Trans Am Club)

 

Your friend is stupid. Of course when its cold its going to get more power. Cold air is more dense thus allowing more 02 molecules per cfm dealing out a bigger combustion in the process.

 

Hey come on! Be nice

 

dont you know we live in the PC era? you cant call someone stupid, you have to do it in a round about way that they think about the question they asked and come to the conclusion themselves....dick move dude.

In any case to the OP; the car will have more power when cold but at operating temp it might not, youre shoving denser air in and packing the cylinders better, depending on where you live id suggest putting a different thermostat in or doing a ram air intake, just a note though ram air sucks with water, so its a bad idea if it rains alot, and swapping the thermostat might be bad too for him based on your location, prime example when i was in az i used a 180* t-stat, perfect for cooling and way under factory temps, but now im in WA and it just ran too cold, kept switching between open and closed loop cuz the ecm couldnt make up its mind

hope that helps

 

stupid is as stupid does

tell your friend he needs to install a hot air intake

but yea really thats pretty much a givin in the H.P. world, thats why people got fans and all kinds of junk blowing on their engines at the strip between runs

 

Wish my engine would stay cold all the time. The world would be a much better place

 

Hello MikeSammy!!

Your supposed to use code........."Your friend is an

 

Hello gta324!!

That's normal!!

All cars run better with cooler air temps, cooler air = denser charge of air/fuel into the cylinders = more power, warm air = less dense charge of air/fuel into the cylinders = less power!!

 

So that means you could never have heat in the winter. That sounds like a crappy time to me

 

Hello Dartht33bagger!!

You know what they say don't you???

Heat is a killer!!!



P.S. I believe that was actually in relation to transmissions, but it still applies here!!

 

Guys!? What's up with this thread? Did anyone notice that after being driven for 30 minutes, the car has better power? How does that have anything to do with ambient temp? And since when do we gang up on an OP without even considering their question?

Sammy, have your freind check his Manifold Air Temp sensor and his Coolant Temp Sensor. He will likely need a scanner to do this. Especially since the MAT sensor is buried at the bottom, rear of the plenum. The CTS can be checked for resistance and I dont have the specs with me now, something like 3,400 ohms at 70 degrees, and 250 ohms at 180. Check service manual to be sure. Using a scanner to monitor datstream makes it easy. Another possiblity is Mass Airflow Sensor but not as likely from your description.

BTW, since when does a cold engine make more power? Anyone ever hear of warmup enrichment? Cold air is one thing. A cold engine never makes the power it makes when its warm. Unless there's something wrong with it.

 

Very true about the cold air/ engine thing, it was misworded and off base, from his description it sounded like a normal jump in and drive when its cold, I'm guilty of that, from what I caught iit would go and have more power, then it got crappy, and then after 30 mins it stayed consistant in performance, like after its fully warmed up until the next day it happens again which would be from sitting in the cold all night, mine does that I find it normal but that's IF he's doing that, I'm kinda curious now if that's wrong lol I might have some work to do

Oh and I think we were defending the op here from a rude statement lol doing our part in keeping the ppeace and all lol

 

talk about bringing up old threads

I cant remember whos car this was anymore...........

 

Oh god I didn't even look at the post date! I saw that pissy post and went from there lol oops

 

Why are you even in the high rpm range when cold to begin with????

What do you mean by better? Better performance or better fuel efficiency/emissions? gotta be careful when using loose terms like that....


Whoa holy ****, the guy responded to a 9 year old thread! My bad too!

 

Took over 9 years for an answer. LOL

 

Hello All!!

It's all in the numbers!!!





I guess I'm as guilty as anyone for not seeing the OP's original post date, I needed the anyways!!!

 

Hello Camaro305SB!!

It was only one day old when I responded!!

 

Yeah I was bored and decided to answer it to see if the original poster would reply. Plus is any other member looks this up atleast they got answers

 

Lol WOW!

 

LOL!! Yeah, I saw this thread on the new posts list. Oh well. Guess we know how well I pay attention.