Took my Vortech G to the dyno again with new mods...yet it's still weak...
05-31-2010, 10:14 PM
#1
Registered User
Thread Starter
iTrader: (4)
Join Date: Apr 2009
Location: Puerto Rico
Posts: 769
Likes: 0
Received 0 Likes
on
0 Posts
Took my Vortech G to the dyno again with new mods...yet it's still weak...
I took my car today with new mods and I'm depressed. For some reason it just doesn't make the power everyone else seems to make on this forum.
Here are some before and after dyno's. The mods are as follows ( My car is a 2003 G35 5AT ):
Before:
Vortech w/ 3.12" pulley with idler pulley mod
600cc injectors
walbro
Skunk2 Plenum Spacer
Testpipes with oem exhaust
1 step colder plugs
After:
Vortech w/ 2.87" pulley with idler pulley mod
600cc injectors
walbro
Skunk2 Plenum Spacer
Megan Racing long tube headers
"Nismo" replica 3" exhaust
cooling fan on the intercooler
1 step colder plugs
Here is the dyno:
The exhaust, headers and pulley only gave me 11whp?
A/F was in the mid 11s and timing was in the 18's. I could go higher but it would start to knock and lower would lose a decent amount of power. Boost would top out at 12psi.
Here are some before and after dyno's. The mods are as follows ( My car is a 2003 G35 5AT ):
Before:
Vortech w/ 3.12" pulley with idler pulley mod
600cc injectors
walbro
Skunk2 Plenum Spacer
Testpipes with oem exhaust
1 step colder plugs
After:
Vortech w/ 2.87" pulley with idler pulley mod
600cc injectors
walbro
Skunk2 Plenum Spacer
Megan Racing long tube headers
"Nismo" replica 3" exhaust
cooling fan on the intercooler
1 step colder plugs
Here is the dyno:
The exhaust, headers and pulley only gave me 11whp?
A/F was in the mid 11s and timing was in the 18's. I could go higher but it would start to knock and lower would lose a decent amount of power. Boost would top out at 12psi.
Last edited by GT-ER; 05-31-2010 at 10:39 PM.
06-01-2010, 01:51 AM
#3
sorry to hear this.. i feel you.
you seems to have boost building up, so, no boost leak. and since you have this much boost, then there isn't any slip.
how's your AFR?
try to compensate this with race fuel.. see how much you get.
you seems to have boost building up, so, no boost leak. and since you have this much boost, then there isn't any slip.
how's your AFR?
try to compensate this with race fuel.. see how much you get.
Last edited by maXmood; 06-01-2010 at 01:57 AM.
06-01-2010, 03:42 AM
#6
Registered User
iTrader: (2)
Join Date: Mar 2008
Location: Sydney, Australia
Posts: 379
Likes: 0
Received 0 Likes
on
0 Posts
I'm getting the same numbers as you, however i have the hks kit, tomei headers, different exhaust and the kinetix manifold on stock pulley.
How much extra is the smaller pulley supposed to give you?
How much extra is the smaller pulley supposed to give you?
06-01-2010, 04:10 AM
#7
Registered User
Thread Starter
iTrader: (4)
Join Date: Apr 2009
Location: Puerto Rico
Posts: 769
Likes: 0
Received 0 Likes
on
0 Posts
Seems fine, it'll even chirp 3rd gear. I do however wonder how well it maintains 3rd gear clamped down though...it does have 80K miles after all and is stock ( just has the trans-go shift kit ).
No, I put 349whp with the 3.12.
Trending Topics
06-01-2010, 04:24 AM
#8
349whp on 3.12 and 360whp on 2.87 isn't really bad tbh. i know you should probably be seeing 380-390whp, but look at other factors that might be affecting your setup.
3" exhaust isn't always the best move to do when FI, this might contribute to your power loss.
3" exhaust isn't always the best move to do when FI, this might contribute to your power loss.
06-01-2010, 05:35 AM
#10
Does seem a bit low for 12psi IMO. I hit 414whp at 10psi on my custom Vortech system. The only thing I would say is that the replica NISMO exhaust could be hurting you. I believe boosted performance just found out how restrictive the exhaust they were using was.
06-01-2010, 08:13 AM
#11
Registered User
Thread Starter
iTrader: (4)
Join Date: Apr 2009
Location: Puerto Rico
Posts: 769
Likes: 0
Received 0 Likes
on
0 Posts
I can't think of anything else...I feel like dynoing again and unbolting the muffler to see what happens.
06-01-2010, 12:24 PM
#17
Registered User
i would have to say it's a auto trans thing. I have header back exhaust 3.12 pulley 10psi different intake though and some other things and i'm at 397whp without water/meth injection. I have a manual. Thats what I have to say about it.
06-01-2010, 12:24 PM
#18
Registered User
Thread Starter
iTrader: (4)
Join Date: Apr 2009
Location: Puerto Rico
Posts: 769
Likes: 0
Received 0 Likes
on
0 Posts
Yup, that's the torque converter locking up. Even bone stock it would do it.
As for the squiggly line, it's always done it. I'm also my own tuner...lol.
Today I installed a 3"cutout.
As for the squiggly line, it's always done it. I'm also my own tuner...lol.
Today I installed a 3"cutout.