y8s

iTrader: (8)

keith, dont send me one. i'm a subscriber. save a tree.

Stein

iTrader: (46)

AAHHHHGH! Went to the site for updates and didn't see anything. Really following this build. Hope to see more soon.

GRM Tom

The extra one is for giving away to a friend. Spread the love!

The update has been written, it should post in the next 24 hours. I'm hoping to get some video of it spewing fire from the header.

Stein

iTrader: (46)

Can't wait to see what kind of performance it offers. It will give me an idea for the 600cc build I would be putting into the '59 I'm "this close" to getting from a guy at work.

Keith@FM

iTrader: (1)

They'll check our mailing list against their subscription list, you shouldn't see an extra copy.

Rafa

iTrader: (22)

You could accept it and send it to me

I'll pay for the shipping.

paul

iTrader: (21)

I do not have anything shielded in my engine bay other than the manifold itself and that was only because I didn't want to look at turbo and manifold surface rust. Never had anything melt and my hood is cool to touch.

A stainless steel exhaust that is new and unpolished doesn't look like it's been sitting in someone's backyard for a year.

As far as the exhaust temps Tim I think you have it backward. You would want to keep the heat in the pipe because higher temp air is lighter and therefor easier to move. So higher temp air aids in spooling over cooler heavier air. On paper anyway. Does it make a measurable difference? I don't know.

Quite often sarcastic but never grumpy. I'm a happy ************.

And Sam has been in my presence only once.

y8s

iTrader: (8)

your pipes are flowing the same gas volume whether it's hot and rarified or cold and dense. i dunno which is better for spool.

i just know what is good for not melting my leg.

SchoonerPaul

iTrader: (1)

paul

iTrader: (21)

Oh that isn't the theory they use to sell all those exhaust coatings?

Please note that I have no coatings on my exhaust components.

sr20ser

iTrader: (1)

The volume is the same, but velocity is higher with hotter gas.
-Tim

paul

iTrader: (21)

And higher velocity air means faster spinning impeller which means quicker spool.


"Performance Coatings offers high heat ceramic coatings capable of withstanding exhaust gas temperatures of 1300° F in our Chromex finish and over 2000° F in our Satin finishes. These coatings possess excellent thermal barrier characteristics, providing a dramatic reduction in radiated heat. This means reduced under-hood temperatures, accelerated exhaust gas velocity and a longer life expectancy for the entire exhaust system, not to mention their chemical and corrosion resistance."

Zabac

iTrader: (39)

Amen!
It is a well known fact. Rally cars coat entire exhausts, from manifold to tip, main reason is too keep cabin temps down but soon realized it help spool and power.
Also, my neighbor who used to race stock cars or something else that goes in a circle, said they saw a 2-3 hp increase from coating their exhausts...now this is not much, but the benefits are obvious. Lower cabin temps, underhood temps, IAT's...I'd like to have those benefits.

Torkel

GRM was one of those things that I sooo missed from living in the US... Until I got an international subscribtion.

sr20ser

iTrader: (1)

Any time that we build a Twin Turbo Viper, everything gets coated or wrapped. It helps out with spool, and more importantly, it keeps your feet from becoming roast (on a Viper anyway).
-Tim

cueball1

iTrader: (13)

Get heat out of charge pipes. Keep heat in exhaust. Don't eat yellow snow.

Basic rules to live by.

danscreations

iTrader: (6)

Tom....car looks good. I've stopped by two or three times to check it out but always seem to miss you. Maybe one of these days!

Baxter

On the Berzerkeley... blame me for holding up that update, but it's up, and there will be another one in the morning: http://grassrootsmotorsports.com/pro...s/berzerkeley/

blue turbo mx5

iTrader: (3)

not bad at all good job