Dynamometer Results & Comparisons Dyno Records | Dyno Discussion | Dyno Wars

416 N/A E85 550rhwp!

Thread Tools
 
Search this Thread
 
Old Jul 28, 2012 | 12:15 PM
  #1  
transam69230's Avatar
Thread Starter
11 Second Club
20 Year Member
iTrader: (49)
 
Joined: Feb 2005
Posts: 1,872
Likes: 22
From: Minnesota
Default 416 N/A E85 550rhwp!

Well I finally got the car on the rollers last month and it made the power I wanted it to but there is still an issue somewhere that I can't narrow down. Here are the graphs that I got. You can clearly see that the graph that isn't smoothed out that there is an issue.

I have been told by my tuner that it is a valve spring related issue. I don't think that it is cause the heads are brand new with less than 3000 miles on them. I purchased everything from LME (heads,cam,rotating assemble, everything). I can feel it in the car it cutsout and comes back on. I can also see it on the wideband the AFR will be like 12.8 and then it shoot to 13.5ish and then comes back down.

I think it has to do with a coil or ignition somewhere. It pulls awesome to 6200 cutouts and comes back in. I want to get this figured out so I can spray this monster. The last pull is with the converter locked up. Its weird I didn't have this issue last year and the car ran a 10.51@128 all motor with a 1.47 60'.

I want to figure this out before winter so I can get my 9s pass this year!





Reply
Old Jul 28, 2012 | 01:37 PM
  #2  
DietCoke's Avatar
10 Second Club
iTrader: (18)
 
Joined: Mar 2004
Posts: 3,869
Likes: 60
From: Richmond Hill, GA
Default

Looks healthy! Graph is similar to mine. You might find a few more ponies in a bigger lid still, too.
Reply
Old Jul 28, 2012 | 02:08 PM
  #3  
Grr's Avatar
Grr
TECH Fanatic
20 Year Member
Photogenic
iTrader: (2)
 
Joined: Mar 2005
Posts: 1,363
Likes: 1
From: Fargo ND
Default

Something to look into as I had it happen last month, check the power wire from the battery to the starter. Mine would cut out like that only under full load, engine was moving enough to touch the cable and melted/shorted out on it and it would come RIGHT back
Reply
Old Jul 28, 2012 | 02:17 PM
  #4  
LIL SS's Avatar
Moderator
iTrader: (9)
 
Joined: Nov 2001
Posts: 2,966
Likes: 2
From: San Jose area
Default

Great numbers.

Similar power to my 13-1 418 wearing PRC 237 heads. Made 546rwhp unlocked.
Reply
Old Jul 28, 2012 | 09:07 PM
  #5  
Brennen's01SS's Avatar
Launching!
iTrader: (1)
 
Joined: Dec 2010
Posts: 293
Likes: 0
Default

Strong setup! I've got the almost the same setup through a 6spd. Mind sharing your cam specs?
Reply
Old Jul 28, 2012 | 11:24 PM
  #6  
transam69230's Avatar
Thread Starter
11 Second Club
20 Year Member
iTrader: (49)
 
Joined: Feb 2005
Posts: 1,872
Likes: 22
From: Minnesota
Default

257/264 .621 .641 on a #114LSA
Reply
Old Jul 29, 2012 | 02:09 AM
  #7  
VINCE's Avatar
Shorty Director
20 Year Member
iTrader: (1)
 
Joined: Nov 2001
Posts: 8,259
Likes: 4
From: Valrico, Florida
Default

I think there is more in it..
Reply
Old Jul 29, 2012 | 12:15 PM
  #8  
transam69230's Avatar
Thread Starter
11 Second Club
20 Year Member
iTrader: (49)
 
Joined: Feb 2005
Posts: 1,872
Likes: 22
From: Minnesota
Default

I am sure there is more in it but I need to fix my issue first.
Reply
LS1 Tech Stories

The Best V8 Stories One Small Block at Time

story-0

Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?

 Pouria Savadkouei
story-1

Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine

 Verdad Gallardo
story-2

7 Most Reliable High-Performance Engines GM Has Ever Built

 Verdad Gallardo
story-3

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

 Verdad Gallardo
story-4

6 Common C5 Corvette Failures and What's Involved In Repairing Them

 Pouria Savadkouei
story-5

Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

 Verdad Gallardo
story-6

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

 Pouria Savadkouei
story-7

Top 10 Most Powerful Chevy Trucks Ever Made!

 
story-8

Hennessey's New Supercharged Silverado ZR2 Has 700 HP

 Verdad Gallardo
story-9

Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

 Verdad Gallardo
Old Jul 29, 2012 | 01:44 PM
  #9  
ramairws6's Avatar
9 Second Club
20 Year Member
Photogenic
Photoriffic
iTrader: (33)
 
Joined: Sep 2004
Posts: 2,013
Likes: 85
From: Hicksville MN!
Default

Originally Posted by transam69230
I am sure there is more in it but I need to fix my issue first.
Nah, it's all done.........
Reply
Old Jul 29, 2012 | 07:12 PM
  #10  
98blueSScamaro's Avatar
11 Second Club
iTrader: (14)
 
Joined: May 2007
Posts: 1,660
Likes: 1
From: Aurora IL
Default

Originally Posted by transam69230
Well I finally got the car on the rollers last month and it made the power I wanted it to but there is still an issue somewhere that I can't narrow down. Here are the graphs that I got. You can clearly see that the graph that isn't smoothed out that there is an issue.

I have been told by my tuner that it is a valve spring related issue. I don't think that it is cause the heads are brand new with less than 3000 miles on them. I purchased everything from LME (heads,cam,rotating assemble, everything). I can feel it in the car it cutsout and comes back on. I can also see it on the wideband the AFR will be like 12.8 and then it shoot to 13.5ish and then comes back down.

I think it has to do with a coil or ignition somewhere. It pulls awesome to 6200 cutouts and comes back in. I want to get this figured out so I can spray this monster. The last pull is with the converter locked up. Its weird I didn't have this issue last year and the car ran a 10.51@128 all motor with a 1.47 60'.

I want to figure this out before winter so I can get my 9s pass this year!






Get this problem fixed this car should be a TQ monster right around where it breaking up. Also is there a cutout on the car?
Reply
Old Jul 29, 2012 | 07:14 PM
  #11  
adamantium's Avatar
Banned
iTrader: (3)
 
Joined: Sep 2011
Posts: 940
Likes: 3
From: From the abyss
Default

I dont think its valve float i researched alot when i thought my car had valve float and the power wouldn't come back in at a higher RPM. It would juts fall off.
Reply
Old Jul 29, 2012 | 08:03 PM
  #12  
transam69230's Avatar
Thread Starter
11 Second Club
20 Year Member
iTrader: (49)
 
Joined: Feb 2005
Posts: 1,872
Likes: 22
From: Minnesota
Default

Yea the car has a cutout where the exhaust goes over the axle where it turns into the muffler. Why do you ask?

I don't think its valve float either but the tuner swears up and down that it is.
Reply
Old Jul 29, 2012 | 08:10 PM
  #13  
adamantium's Avatar
Banned
iTrader: (3)
 
Joined: Sep 2011
Posts: 940
Likes: 3
From: From the abyss
Default

Originally Posted by transam69230
Yea the car has a cutout where the exhaust goes over the axle where it turns into the muffler. Why do you ask?

I don't think its valve float either but the tuner swears up and down that it is.
Hmmmm, maybe take out a valve and have them pressure tested? If he's a knowledgeable guy then his 2 cents should mean something.

But from all the vids/threads ive seen explaining HOW and WHEN valve float occurs it would not make sense that at a higher RPM for the power to comeback.

Try googling "LS1 valvefloat".

In one of the threads i saw Damian chime in on that, when someone had a similar issue to you.

Originally Posted by Damian
No, because valve float usually doesn't recover.
Reply
Old Jul 29, 2012 | 08:49 PM
  #14  
litle88's Avatar
12 Second Club
15 Year Member
iTrader: (20)
 
Joined: Jan 2007
Posts: 2,561
Likes: 4
From: Burbank, Illinois
Default

I'm having somewhat the same issue!! I hear it breaking up a Lil when I go 2nd to 4th under 3/4 throttle sorta speak or between shifts I feel it somewhat die out. I have ls3 coils so it's not that and I had this problem with my ls1 but that was really bad and all the time! and this is intermittent. I'm thinking a wire in the harness some where. But how do you test the wiring. Sorry to high jack bud just thought it might be the same issue. Sorry and thanks.
Reply
Old Jul 29, 2012 | 08:49 PM
  #15  
litle88's Avatar
12 Second Club
15 Year Member
iTrader: (20)
 
Joined: Jan 2007
Posts: 2,561
Likes: 4
From: Burbank, Illinois
Default

Ps you can see it in my graph as well.
Reply
Old Jul 29, 2012 | 09:12 PM
  #16  
98blueSScamaro's Avatar
11 Second Club
iTrader: (14)
 
Joined: May 2007
Posts: 1,660
Likes: 1
From: Aurora IL
Default

Originally Posted by litle88
I'm having somewhat the same issue!! I hear it breaking up a Lil when I go 2nd to 4th under 3/4 throttle sorta speak or between shifts I feel it somewhat die out. I have ls3 coils so it's not that and I had this problem with my ls1 but that was really bad and all the time! and this is intermittent. I'm thinking a wire in the harness some where. But how do you test the wiring. Sorry to high jack bud just thought it might be the same issue. Sorry and thanks.
Zeke to find this you would need to pull the ECM and sorce aka what connector it goes to. And ohm it. Or remove the engine harness and check every inch of wire
Reply
Old Jul 29, 2012 | 09:59 PM
  #17  
litle88's Avatar
12 Second Club
15 Year Member
iTrader: (20)
 
Joined: Jan 2007
Posts: 2,561
Likes: 4
From: Burbank, Illinois
Default

I was afraid you'd say that Rob, I mean it's not all the time. Hell you got on it!
Reply
Old Aug 1, 2012 | 09:56 PM
  #18  
ramairws6's Avatar
9 Second Club
20 Year Member
Photogenic
Photoriffic
iTrader: (33)
 
Joined: Sep 2004
Posts: 2,013
Likes: 85
From: Hicksville MN!
Default

Still not fixed yet? I thought you had it narrowed down to a coil pack?? Mine is finally figured out and ready for the track.
Reply
Old Aug 1, 2012 | 10:29 PM
  #19  
litle88's Avatar
12 Second Club
15 Year Member
iTrader: (20)
 
Joined: Jan 2007
Posts: 2,561
Likes: 4
From: Burbank, Illinois
Default

I had sold the short block and got this new set up and new Ls3 coil packs and now it's just intermittent. So that will be my winter project I guess.
Reply
Old Aug 17, 2012 | 12:30 AM
  #20  
Engine_HP's Avatar
TECH Fanatic
iTrader: (1)
 
Joined: Jun 2008
Posts: 1,752
Likes: 9
From: Middle East.
Default

Nice torque curve
Reply




All times are GMT -5. The time now is 02:50 PM.

story-0
Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?

Slideshow: We take a close look at the ONE and Artidiag 800BT2 diagnostic tools from Topdon and the reasons to buy one over the other.

By Pouria Savadkouei | 2026-05-28 11:05:11


VIEW MORE
story-1
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine

Slideshow: The controversial Ferrari F6 swaps its original flat-12 for a Corvette Z06-derived LT4 V8 and sends power to four rear wheels through a custom-built drivetrain.

By Verdad Gallardo | 2026-05-26 18:23:54


VIEW MORE
story-2
7 Most Reliable High-Performance Engines GM Has Ever Built

Slideshow:These GM engines didn't just make huge power, they survived abuse, boost, track days, and six-digit mileage with a reputation for refusing to quit.

By Verdad Gallardo | 2026-05-21 16:45:27


VIEW MORE
story-3
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-4
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-5
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-6
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-7
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-8
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-9
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