375 whp NA?
03-27-2009, 06:12 AM
#161
In typical japanese marketing, they don't really dish out the real digits unless they have got the goods. I remember an old japanese article rounding up all the 300+ hp Zs from various tuners, too bad the article went down, it had a list of mods for each.
03-27-2009, 09:21 AM
#165
Z + Rear Seat
iTrader: (3)
Join Date: Jun 2005
Location: St.Pete,FL
Posts: 1,642
Likes: 0
Received 0 Likes
on
0 Posts
I believe that you really need to get a standalone ECU to get the most hosepower out of the VQ. The first motor I put in my car was a wrecking yard VQ30 with just headers and Motec and it put out 220 RWHP from a 190 hp motor. Then I added Nismo heads and cams and it would make over 260 rwhp.
This was with a stock bottom end. Most of the time you are limited by emissions so a Motec etc. can not be run, but I know a Motec really wakes up the VQ.
This was with a stock bottom end. Most of the time you are limited by emissions so a Motec etc. can not be run, but I know a Motec really wakes up the VQ.
I could understand it when discussing a FI VQ with boost. MAP mode would possibly be more desirable than using a MAF sensor. Control of Nitrous and Meth would also be easier with a standalone.
What can a standalone control on a NA VQ that software like Osiris Tuner can not control?
03-27-2009, 11:33 AM
#166
Registered User
Join Date: Mar 2009
Location: Lake Stevens
Posts: 38
Likes: 0
Received 0 Likes
on
0 Posts
I am not familiar with the other units for tuning the VQ. When I set up the car there was not much available to run the motor except to have JWT flash a stock ecu to a certain setup and if I changed something I would have to wait to get it flashed again. With the Motec we could instantly bump the timing,and fuel and see the results on the dyno. I don't know what your setups are capable of for tuning but I know the Motec can produce results on a stock motor with only headers. If I remember correctly we had the VQ30 at almost 40 deg advanced and this motor ran fine on pump gas. It just seems that people are adding cams and exhaust and so on and they still do not seem to get the power out of the motor and I think it is limited by what the ecu can do.
03-27-2009, 12:54 PM
#167
Z + Rear Seat
iTrader: (3)
Join Date: Jun 2005
Location: St.Pete,FL
Posts: 1,642
Likes: 0
Received 0 Likes
on
0 Posts
I am not familiar with the other units for tuning the VQ. When I set up the car there was not much available to run the motor except to have JWT flash a stock ecu to a certain setup and if I changed something I would have to wait to get it flashed again. With the Motec we could instantly bump the timing,and fuel and see the results on the dyno. I don't know what your setups are capable of for tuning but I know the Motec can produce results on a stock motor with only headers. If I remember correctly we had the VQ30 at almost 40 deg advanced and this motor ran fine on pump gas. It just seems that people are adding cams and exhaust and so on and they still do not seem to get the power out of the motor and I think it is limited by what the ecu can do.
Modern versions of UpRev's Osiris Tuner software are also capable of tuning the timing and fuel in real time as you mentioned above. Additionally, because you are changing the actual ECU settings, the complications with the RevUp engine's limitations do not affect this type of tuning.
03-27-2009, 01:24 PM
#168
Banned
iTrader: (2)
Join Date: Aug 2005
Location: OC - So Cal
Posts: 1,228
Likes: 0
Received 0 Likes
on
0 Posts
Oh ok. Last time I heard anything about it the car was making 350PS, which in HP is about 345. Although I'm not 100% sure and it more than likely was rated at the flywheel.
The only reason this thread caught my attention was because I have someone about to go through a VQ35DE rebuild and was keen on keeping it naturally aspirated, but mentioned wanting to make about 350 whp. I have never had a chance to get my hands dirty on a VQ35 yet, and at first I had thought it wouldn't be impossible.
I understand that naturally aspirated tuning doesn't yield as much power as forced induction, but with a large displacement V6 why is it so difficult to break 300?
For reference I have the main components of the build planned out as follows:
Wiseco 11:1 Pistons
CP Rings
ACL Bearings
Eagle H-Beam Rods
BC 272s IN/EX
BC +1 Valves
BC Springs and Titanium Retainers
Heads are being ported and polished, valves angled
I also thought of using Cosworth MHGs
I don't know what's going to be used as far as intake manifold, exhaust system, exhaust manifold, fuel system, etc.
What's the weak link that keeps this motor from making N/A power?
-Justin
The only reason this thread caught my attention was because I have someone about to go through a VQ35DE rebuild and was keen on keeping it naturally aspirated, but mentioned wanting to make about 350 whp. I have never had a chance to get my hands dirty on a VQ35 yet, and at first I had thought it wouldn't be impossible.
I understand that naturally aspirated tuning doesn't yield as much power as forced induction, but with a large displacement V6 why is it so difficult to break 300?
For reference I have the main components of the build planned out as follows:
Wiseco 11:1 Pistons
CP Rings
ACL Bearings
Eagle H-Beam Rods
BC 272s IN/EX
BC +1 Valves
BC Springs and Titanium Retainers
Heads are being ported and polished, valves angled
I also thought of using Cosworth MHGs
I don't know what's going to be used as far as intake manifold, exhaust system, exhaust manifold, fuel system, etc.
What's the weak link that keeps this motor from making N/A power?
-Justin
03-27-2009, 01:28 PM
#169
Banned
iTrader: (2)
Join Date: Aug 2005
Location: OC - So Cal
Posts: 1,228
Likes: 0
Received 0 Likes
on
0 Posts
I am not familiar with the other units for tuning the VQ. When I set up the car there was not much available to run the motor except to have JWT flash a stock ecu to a certain setup and if I changed something I would have to wait to get it flashed again. With the Motec we could instantly bump the timing,and fuel and see the results on the dyno. I don't know what your setups are capable of for tuning but I know the Motec can produce results on a stock motor with only headers. If I remember correctly we had the VQ30 at almost 40 deg advanced and this motor ran fine on pump gas. It just seems that people are adding cams and exhaust and so on and they still do not seem to get the power out of the motor and I think it is limited by what the ecu can do.
03-27-2009, 02:58 PM
#170
Registered User
Join Date: Mar 2009
Location: Lake Stevens
Posts: 38
Likes: 0
Received 0 Likes
on
0 Posts
So I take it then that the newer tuners can now do it at the dyno as they run and adjust accordingly. It would be interesting to see the fuel, timing maps to compare with the Motec setup. I would imagine there is a safety factor in your tune where we push the limits.
03-28-2009, 10:35 AM
#171
Z + Rear Seat
iTrader: (3)
Join Date: Jun 2005
Location: St.Pete,FL
Posts: 1,642
Likes: 0
Received 0 Likes
on
0 Posts
Quite likely, but it is the owner/tuners choice... Not a limitation of the software.
03-28-2009, 11:45 AM
#172
Yes, exactly. UpRev's Osiris is actually the only ECU tuning software (that I know of) with this capability. Most other ECU tuning companies offer pre-programmed maps or require you to mail the ECU to them for flashing.
Quite likely, but it is the owner/tuners choice... Not a limitation of the software.
Quite likely, but it is the owner/tuners choice... Not a limitation of the software.
AAM flashes ecu's and it doesn't have to be mail in
03-28-2009, 12:18 PM
#174
Z + Rear Seat
iTrader: (3)
Join Date: Jun 2005
Location: St.Pete,FL
Posts: 1,642
Likes: 0
Received 0 Likes
on
0 Posts
"require you to mail or drive the ECU to them for flashing."
Hahaha... No bashing intended... Just trying to show that there are new options for tuning stock ECUs in real time without a piggyback/standalone.
.
Thread
Thread Starter
Forum
Replies
Last Post
bcoffee20
Zs & Gs For Sale
5
11-19-2015 06:39 PM
ndelgro
Mid-Atlantic Marketplace
0
09-07-2015 04:11 PM
