Forced Induction Superchargers | Turbochargers | Intercoolers

New best and Broken stuff --Advice Please

Thread Tools
 
Search this Thread
 
Old Oct 7, 2006 | 10:50 PM
  #1  
enginjoe's Avatar
Thread Starter
TECH Enthusiast
iTrader: (11)
 
Joined: Feb 2004
Posts: 679
Likes: 1
From: Tucson, AZ
Default New best and Broken stuff --Advice Please

Went to the track and ran a 12.058 @120.3mph w/2.0 60ft.

After the run I noticed a clattering noise at certain rpms and loads. There was no detonation and I think it was almost impossible due to the following: T67 @8psi, 50/50 mix 91/100 octane, 100% meth injection turning on at 6psi with about 10.2 afr. It sounds deep in the engine more than up top. I took off the valve covers and everything is ok up there (I up graded springs, ti ret's and chromoly pushrods when I did the cam). I pulled the oil filter and cut it open and it is filled with small metal flakes (oil was 2 days old). So, I'm thinking spun rod bearing from the sound and from my searches on the forum here. Anyway, my question is, would it be worth it to rebuild, using the stock crank(if useable) but use forged pistions and rods this time or just go for the whole enchilada. My plans are to go ~8.5 to 1 compression w/good heads and max out the T67 using an intercooler then eventually get to 15 psi with a T76.

edit --> Oil pressure is good: 40psi at idle
Reply
Old Oct 7, 2006 | 11:40 PM
  #2  
gametech's Avatar
TECH Veteran
20 Year Member
Active Streak: 30 Days
Active Streak: 60 Days
Top Answer: 1
iTrader: (1)
 
Joined: Sep 2004
Posts: 4,905
Likes: 906
From: Stockbridge GA
Default

Sounds like an excuse for a stroker crank. I mean hell, the motor will already be out, right?
Reply
Old Oct 7, 2006 | 11:47 PM
  #3  
navymitch12's Avatar
12 Second Club
iTrader: (1)
 
Joined: Nov 2005
Posts: 1,017
Likes: 0
From: Texas
Default

sorry to tell you but sounds like you spun a bearing.....

i spun one like 4 mths ago and it did the exact same thing you are describing
Reply
Old Oct 8, 2006 | 02:52 AM
  #4  
enginjoe's Avatar
Thread Starter
TECH Enthusiast
iTrader: (11)
 
Joined: Feb 2004
Posts: 679
Likes: 1
From: Tucson, AZ
Default

Yeah, motor's coming out. It's gonna take me awhile because of work and stuff. Then I've got to save up some dollars...

I was just wondering what I could do for a little bit less money.
Reply
Old Oct 8, 2006 | 08:18 AM
  #5  
99.9percenter's Avatar
TECH Enthusiast
iTrader: (2)
 
Joined: Feb 2004
Posts: 577
Likes: 0
From: Washington
Default

Spun bearing may not of hurt the crank. Clean off the burnt bearing material, check everything out.
Reply




All times are GMT -5. The time now is 03:45 PM.

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