who knows

[papaspanky]

I'm glad I get all the answers I need here. like the myth that a free flowing exhaust does nothing till you reach 450 horsepower or that stuffing hot air into an engine helps power production. a free flowing exhaust never hurts power but hot air into the engine does. or maybe the myth that wrapping headers is bad. hate to tell you no its not keeping underhood temps down with exhaust helps. if your wrapped headers crack that means you bought cheap headers. I have always wrapped them and never had any crack they rust faster but hey always a trade off. oh yeah big wheels kill fuel economy and power. lose the big wheels every 100 pounds of unsprung weight lost means being 1 10th second in th quarter.I could go on but!!!!!!!

[Pepino]

I'm knofuzed here?

[Slowpoke]

But what?

[Fatboy501]

Chicka chicka what, chicka what, chicka who?

[Explicit_Spade]

Poor flowing exhaust is Bad
Good flowing exhaust is good.
HIGH flowing exhaust is Bad.

Wrapping headers can cause them to crack.

Big wheels cause excess stress on the Transmission and Engine.

There are reasons against everything you just *****ed about. If you read more you would understand why reccomendations are given.

[papaspanky]

there are arguments for all of what I said but what is true is true. cooler intake air is better for power than hot air, a good flowing exhaust is better for power. wrapping headers keeps exhaust velocity up which is good for power. (ceramic coating is the best but pricey)if you are worried about cracking spend a little extra on good headers.(if they are plain steel welded with stainless wire they are gonna crack no matter what you do).

[ctracer]

cooler intake air is better, but once it gets past a blower its gonna get really hot anyways, especially on these s/c. a good flowing exhaust is always good, but you dont need a free flowing exhaust until you reach a certain amount of power anyways. right? isnt what im saying true as well? idk why you even brought the wheels into it...i thought less weight always usually meant a better power to weight ratio...i wonder why people take out their jacks/spare tires/backseats at the strip?

[Explicit_Spade]

What works works, if you go against the grain, you're gonna get burnt. I've been around Grand Prixs for 5 years and have seen how trends have changed.

Intake: colder air is more dense, yes. That's why a filter in a box is better than a ram air as far as intake temps and air density. Wizaired used to be an industry leader, then... Things took a turn and people were cutting faster times with just a ram air intake. It takes less time for cold air to get hot than warm air to get hot, hence why the ram intakes work.

Good flowing exhaust is fine, but too good of a flow is bad because you get no boost. Go on GPONA and read the posts about exhaust velocity that were post by the engineer that's on that forum.

Your statements about buying more expensive headers are obserd. There is NO NEED to coat 3800 headers. Coating also does nothing for exhaust velocity.

[matt5112]

my maggy catback hasn't helped terribly.

I can run a little leaner, but not much.

Some of that is probably due to the weather more than anything else.

And this car should be making 250-270 WHP.

Will find out tomorrow.

[z3r0]

Grand Prixs Of North America • Login

very fun read

[matt5112]

And this car should be making 250-270 WHP.

266 WHP, not a bad guess.

Grand Prixs Of North America • Login

very fun read

Y u post troll thread?

[Explicit_Spade]

After some skimming, Planeboy18, The engineer post a lot of good information on air tubulance in that thread.

I could see papaspanky siding with the OP and his "Pavement Pounder"...

[blueguy]

oh yeah big wheels kill fuel economy and power. lose the big wheels every 100 pounds of unsprung weight lost means being 1 10th second in th quarter.I could go on but!!!!!!!

[machinegunsquid]

Now... I just wanna complain.


Wrapping headers is a good concept, but pointless. IF you wanna keep heat down, get it ceramic coated inside/out.

Cooler air into the engine is a good idea...

But there's this big spinny thingy that Im pretty sure it's only good for heating air up.

Also, big wheels arent unsprung weight...They are rotating mass....Unsprung weight is having a fat kid in the backseat.

[matt5112]

In a ground vehicle with a suspension, the unsprung weight (or the unsprung mass) is the mass of the suspension, wheels or tracks (as applicable), and other components directly connected to them, rather than supported by the suspension. (The mass of the body and other components supported by the suspension is the sprung mass.) Unsprung weight includes the mass of components such as the wheel axles, wheel bearings, wheel hubs, tires, and a portion of the weight of driveshafts, springs, shock absorbers, and suspension links. Even if the vehicle's brakes are mounted outboard (i.e., within the wheel), their weight is still considered part of the unsprung weight.

so....

Suspension is partially sprung though.

[GreyGhost]

Wrap the headers, but realize that they will get heat soaked at some point and it just takes that much longer for them to cool down. On the GM 3.8 there is no fatory IC, but on other vehicles that have them and they run anywhere near the exhaust most are wrapping the IC to keep it from heating up so quickly, but once it's hot it's hot due to the wrap.