Disappointed Dyno

Reply Subscribe

Thread Tools

Search this Thread

Mar 2, 2012 | 12:47 PM

#21

gdc

Racer

Joined: Apr 2005

Posts: 294

Likes: 0

From: High Point NC

Quote:

Originally Posted by rssshen vette

Thanks guys for your responses!
* BLK89Z51 PM me the number of tuner.
* I'll check the plugs and plug wires this weekend. I think there maybe some burnt plug wires causing the dead miss.
* The FPR is reading 45-50psi at idle.
* My exhaust has no Cats so there nothing to get clogged.
Today as I drove it home from Va Beach to Newport news it ran with a dead miss under load, but at an idle it ran fine. They (Va Speed) mentioned there was dead miss under load as they tuned it, but needed more time to find the cause which would have driven up the my final bill. Ahhhh NO THANKS!
At the time when I did the 1st dyno I knew I needed to mod my intake and exhaust systems in order for the engine to breath and make HP. After the intake and exhaust mods were made. I didn't get it dyno during that time, but I know my HP and TQ had increase significantly from my time slip at the 1/8 mile track. I before the installation of my current cam and ecu.
My car went from an 1.90 60' 8.80 1/8 mile @ 78mph to running 1.61 60' and 7.75 1/8mile @92mph with a mail order tune for a 870 ecu.

If there was a dead miss, that's why the #'s are low. Why the hell would they continue to try to tune it with a cylinder not firing?!!!

Mar 2, 2012 | 12:50 PM

#22

Nathan Plemons

Race Director

Joined: May 2001

Posts: 14,165

Likes: 9

Quote:

Originally Posted by gdc

If there was a dead miss, that's why the #'s are low. Why the hell would they continue to try to tune it with a cylinder not firing?!!!

No kidding. I used to do some tuning with a local speed shop. We had a guy come in one day in a C4, had a stealth ram and it looked to be very interesting. He burned up a plug wire on one of his headers and we couldn't find a replacement. We un-strapped the car and told him to come back when he could get that resolved. Otherwise we were just wasting everybody's time.

Mar 2, 2012 | 01:04 PM

#23

TTOP350

Racer

Joined: May 2011

Posts: 293

Likes: 4

I would also recommend bigger heads when you do your intake swap, esp if you go mini ram. Minimum 195s, I like to run 210s on my 350s and 210s would be the smallest Id use on a 383. No, it wont be a dog down, it will make the same or even more power than smaller heads. Your EFI, not carbed, so it works very well.

Mar 2, 2012 | 01:21 PM

#24

Black89Z51

Suckin' gas, haulin' ass.

Joined: Apr 2010

Posts: 1,100

Likes: 8

From: Newport News Virginia

Part of the problem is the shop he took it to. They aren't good tuners to begin with, plus there have been several cars that they have half-assed. Bottom line with VA Speed is that if you aren't spending $20k, they could give a crap less. It's more of get em in get em out thing.

Mar 2, 2012 | 02:32 PM

#25

88BlackZ-51

Race Director

Joined: May 2003

Posts: 10,749

Likes: 41

Does your C4 pull harder then the C5? If the answer is yes then the dyno reading is messed up.

Mar 2, 2012 | 02:38 PM

#26

cv67

Team Owner

Joined: Oct 2004

Posts: 81,241

Likes: 3,063

From: altered state

St. Jude Donor '05

NOW the dyno thread is complete.

Mar 2, 2012 | 03:01 PM

#27

rssshen vette

Thread Starter

Pro

Joined: Oct 2004

Posts: 644

Likes: 15

From: Clarksville Tennessee

I checked out the Plugs and plug wires. The #1 plug wire was burnt.
URL=http://s130.photobucket.com/albums/p244/Rssshen_vette/?action=view&current=BurntPlugWire.jpg]

[/URL].

All the Spark plugs on the driverside was cover with fuel and a slight burn spot. See Pic:

All the plugs on the passenger side were fouled:

I replace the burnt plug wire. I'll do the plugs this tomorrow.

Mar 3, 2012 | 01:44 AM

#28

bolowbc

Racer

Joined: Sep 2007

Posts: 401

Likes: 7

From: Irvine CA

Quote:

Originally Posted by rssshen vette

I checked out the Plugs and plug wires. The #1 plug wire was burnt.

All the Spark plugs on the driverside was cover with fuel and a slight burn spot.
All the plugs on the passenger side were fouled:

I replace the burnt plug wire. I'll do the plugs this tomorrow.

Hmmm... can't wait to hear how it runs now