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Author Topic:   Nose and exhaust
wtbrlr3
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posted December 14, 2005 03:10 AM     Click Here to See the Profile for wtbrlr3   Click Here to Email wtbrlr3      Reply w/Quote
I was wondering how many guys cut holes in the nose for cooling when running a monte carlo nose. Or do you hope you get enough air under the nose? Does anyone run the smaller radiators 22"X19" with or without holes? If you do run holes in the nose do you box in the air all the way to the radiator?

Also how much exhaust pipe do most people run. Do you run it behind the driver or by his feet or out the side left or right? I also have to run stock manifolds.

New to dirt, any help would be great.

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johder
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posted December 14, 2005 04:10 AM     Click Here to See the Profile for johder   Click Here to Email johder      Reply w/Quote
open long tube headers with turndowns, shortys with little extensions, or you can go the expensive route, shoenfields over the rail and out behind the front tires.

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brabbit75
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posted December 14, 2005 07:08 AM     Click Here to See the Profile for brabbit75   Click Here to Email brabbit75      Reply w/Quote
A lot of people around here have to cut holes in the nose so they don't overheat, usually 6-8 1 1/2 holes or somewhere around that size. for exhaust, i've heard that you should put 3" pipe off the manifolds for a distance of 2-3 feet, so it comes out straight off manifolds, with one bend in it, according to some dyno results I heard about last year

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sc1 racing
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posted December 14, 2005 09:17 AM     Click Here to See the Profile for sc1 racing   Click Here to Email sc1 racing      Reply w/Quote
if timming and carb are set right, and a good shroad you will not need any holes in the nose pc.

ive never ran pipes on the exhaust but have been told to install pipe. paint white and run at high rpm for 3-5 min then cut exuast off where paint stops changing. dont know if it is worth the time or not. maybe someone can explain it better.

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wtbrlr3
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posted December 14, 2005 11:38 AM     Click Here to See the Profile for wtbrlr3   Click Here to Email wtbrlr3      Reply w/Quote
Lets see if I understand this right. No holes in the nose I asume that you have a three sided box in front of the radiator with the bottom side open to let the air in? Do you have to force or deflect any of the air up with a break?

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nate21
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posted December 14, 2005 12:27 PM     Click Here to See the Profile for nate21      Reply w/Quote
quote:
Originally posted by sc1 racing:

ive never ran pipes on the exhaust but have been told to install pipe. paint white and run at high rpm for 3-5 min then cut exuast off where paint stops changing. dont know if it is worth the time or not. maybe someone can explain it better.

I have heard that also. What kind of headers do you guys like?

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racin78p
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posted December 14, 2005 01:28 PM     Click Here to See the Profile for racin78p   Click Here to Email racin78p      Reply w/Quote
Alot of variables will determine if you will need to cut holes in the nose piece. I ran a little warm my first year. Checked everything, adjusted things as much as I could. Made sure had all options played out. I didn't want holes in my NEW AND PRETTY nose piece, but my mechanic finally convienced me to do it. After cutting about ten holes in the center, the engine temp went down about 10 degrees.

Box in front of the rad, yes. Run a big radiator. I haven't used "water wetter", but I know guys who do. It all depends on how hot you run, as to what you will need to do (if anything).

Can't say on the exhaust pipe. I run headers straight out of the box.

Welcome to the dirt, brother. Enjoy!

Race on.


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racin78p
if it ain't fun, then don't run

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eborcim
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posted December 14, 2005 02:48 PM     Click Here to See the Profile for eborcim      Reply w/Quote
If you don't cut holes in the plastic nose, it helps to keep them open at the bottom and not let them press flat against the bumper. We do this with bent aluminum diamondplate, but anything sturdy will work. Remember its a racecar not a bulldozer. Just keep the nose out of trouble.

This creates a slight bit of vacuum under the nose and helps draw air into the radiator. Putting a little 3-4" air dam under the width of the radiator and some kind of side shrouds helps pull that cooler air in too.

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outlawstock17
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posted December 14, 2005 05:06 PM     Click Here to See the Profile for outlawstock17   Click Here to Email outlawstock17      Reply w/Quote
you guys that aren't running an exhaust system are leaving something on the table...

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racer17j
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posted December 14, 2005 06:11 PM     Click Here to See the Profile for racer17j   Click Here to Email racer17j      Reply w/Quote
we use the painted pipe trick too. paint um white let it run for a while then cut it off where the paint stops burning. nose wise if you can get it setup righ you won't need holes but with ot without make sure you have a good screen sysytem in front incase the nose gets ripped off

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Pickel
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posted December 14, 2005 06:21 PM     Click Here to See the Profile for Pickel   Click Here to Email Pickel      Reply w/Quote
Try the elictric fan.. It works pretty good too..

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bobaluuu
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posted December 14, 2005 08:02 PM     Click Here to See the Profile for bobaluuu   Click Here to Email bobaluuu      Reply w/Quote
read the post on this site about exhaust, probably one of the clearest explanations I've seenhttp://www.castheads.com/

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Light it up, Baby!

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petordragon
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posted April 06, 2006 07:20 PM     Click Here to See the Profile for petordragon   Click Here to Email petordragon      Reply w/Quote
go with a y pipe set up 15 - 20 hp gains on the dyno

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