Forced Induction Superchargers | Turbochargers | Intercoolers

Low compression 408 break in..

Thread Tools
 
Search this Thread
 
Old Aug 22, 2005 | 08:09 PM
  #1  
Blown408's Avatar
Thread Starter
TECH Regular
iTrader: (4)
 
Joined: May 2005
Posts: 411
Likes: 0
Default Low compression 408 break in..

I am trying to find out what to do about the break in on my 8:1 compression 408. I am planning on running about 15-20 pounds of boost, but thought I could run without the supercharger, until I get it dyno tuned. I though I could get a cheap mail order tune until I put the break in miles on the engine, then slip the belt on, and have it tuned right.

Would it run good enough to let me put the break in miles on it without the boost?

Any help would be appreciated.
Reply
Old Aug 22, 2005 | 08:17 PM
  #2  
PurEvl's Avatar
TECH Senior Member
iTrader: (2)
 
Joined: Mar 2002
Posts: 5,469
Likes: 0
From: South of Heaven
Default

i broke mine in for about 1200 miles NA an took it easy as possible before 1000. Like not leaving it wot for long periods. I actually kept it under 4000 rpm as well.
Reply
Old Aug 22, 2005 | 08:33 PM
  #3  
Brent@LPE's Avatar
FormerVendor
 
Joined: Aug 2005
Posts: 531
Likes: 0
From: Decatur IN.
Default

break it in in the burnout WFO...juss kidding with ring tech and hone tech the way it is now your looking @ ten minutes to full ring seal(matt hartford@totalseal.com)as long as clearences are not tight in rod and main bearings you should be fine before 500 just dont detonate......
cheers...
Reply
Old Aug 23, 2005 | 06:00 AM
  #4  
Blown408's Avatar
Thread Starter
TECH Regular
iTrader: (4)
 
Joined: May 2005
Posts: 411
Likes: 0
Default

But would it totally drive like *** N/A with a mail order tune? I don't want to waste the time or the money to tune it on the dyno N/A or on low boost and have to do it again after the engine is broken in.
Reply
Old Aug 23, 2005 | 09:11 AM
  #5  
ls1290's Avatar
Dumb Ass Vette Moderator
20 Year Member
Photogenic
Photoriffic
Shutterbug
iTrader: (20)
 
Joined: Jun 2002
Posts: 4,281
Likes: 2
From: Colorado
Default

You need to do a couple of hard WOT runs with engine breaking( let the car decelerate without the brakes ) to seat the rings. After that, give it hell

Keith
Reply
Old Aug 23, 2005 | 11:22 PM
  #6  
Brent@LPE's Avatar
FormerVendor
 
Joined: Aug 2005
Posts: 531
Likes: 0
From: Decatur IN.
Default

he mail order tune will be off with or with out the belt on.I would suggest breaking in (no belt)then getting to a reputable chassis dyno and get a custum tune....
good luck!
Reply




All times are GMT -5. The time now is 08:38 AM.

story-0
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

Slideshow: This heavily modified 1971 Camaro mixes classic muscle car styling with a fifth-generation Camaro interior and modern LS3 power.

By Verdad Gallardo | 2026-05-12 18:06:42


VIEW MORE
story-1
6 Common C5 Corvette Failures and What's Involved In Repairing Them

Slideshow: From wobbling harmonic balancers to failed EBCMs, these are the issues that define long-term C5 ownership and what repairs typically involve.

By Pouria Savadkouei | 2026-05-07 18:44:57


VIEW MORE
story-2
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

Slideshow: A modern Camaro transformed into a retro icon, this limited-run "Bandit" build blends nostalgia with brute force in a way few revivals manage.

By Verdad Gallardo | 2026-04-21 13:57:02


VIEW MORE
story-3
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

Slideshow: Cadillac didn't just crash the high-performance luxury vehicle party, it showed up loud, supercharged, and occasionally a little unhinged...

By Pouria Savadkouei | 2026-04-16 10:05:15


VIEW MORE
story-4
Top 10 Most Powerful Chevy Trucks Ever Made!

Slideshow: Top ten most powerful Chevy trucks ever made

By | 2026-03-25 09:22:26


VIEW MORE
story-5
Hennessey's New Supercharged Silverado ZR2 Has 700 HP

Slideshow: Hennessey has turned the Silverado ZR2 into a 700-hp off-road monster with supercharged V8 power and a limited production run.

By Verdad Gallardo | 2026-03-24 18:57:52


VIEW MORE
story-6
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

Slideshow: A one-off sports car that looks like a vintage Italian exotic-but hides a C6 Corvette underneath-just sold for the price of a new mid-engine Corvette.

By Verdad Gallardo | 2026-03-23 18:53:41


VIEW MORE
story-7
Awesome K5 Blazer Restomod Comes With C7 Corvette Power

Slideshow: A heavily reworked 1972 K5 Blazer swaps its off-road roots for a low-slung street-focused build with modern V8 power.

By Verdad Gallardo | 2026-03-09 18:08:45


VIEW MORE
story-8
10 Camaros You Should Never Buy

Slideshow: There are thousands of used Camaros on the market but we think you should avoid these 10

By | 2026-02-17 17:09:30


VIEW MORE
story-9
10 LS Engine Myths That Refuse to Die

Slideshows: Which one of these myths do you believe?

By Verdad Gallardo | 2026-01-28 18:10:11


VIEW MORE