Another modified 00VI
#1
Another modified 00VI
Here's a little project I've been working on.
The thought was to make a short runner IM out of a 2k IM, similar to what Tilley recently did (ref: http://forums.maxima.org/showthread.php?t=395063). I took a different approach:
The thought was to make a short runner IM out of a 2k IM, similar to what Tilley recently did (ref: http://forums.maxima.org/showthread.php?t=395063). I took a different approach:
#2
Results?
Like Tilley, I noticed a drop in torque, but top end felt good.
I did a 3rd gear run to 7000 rpm and logged maf voltage. Comparing to data from a recent dyno run with an unmodified 00VI, I show less airflow at low-midrange rpm, and occasional insignificantly small gains alternating with losses from 5300 rpm on up.
Based on this, I'm not going to bother to have a dyno done, although a dyno might show higher gains with the modified 00VI, since the airflow data was collected on a considerably warmer day than the dyno results I am comparing against.
Like Tilley, I noticed a drop in torque, but top end felt good.
I did a 3rd gear run to 7000 rpm and logged maf voltage. Comparing to data from a recent dyno run with an unmodified 00VI, I show less airflow at low-midrange rpm, and occasional insignificantly small gains alternating with losses from 5300 rpm on up.
Based on this, I'm not going to bother to have a dyno done, although a dyno might show higher gains with the modified 00VI, since the airflow data was collected on a considerably warmer day than the dyno results I am comparing against.
#4
Originally Posted by krismax
wouldnt that hurt haveing the runners still behind the TB?
#6
The factory TB mount is set up to deliver the same amount of air to all cylinders by gradually decreasing the size of the main channel until the last cylinder runner. By doing what you did, I would be worried about different cylinders running lean/rich in the setup. Since the main channel is the same size, the rear cylinders may not be getting the same airflow. It also looks like the flow would be very rough the the other cylinders because of the runners sticking up in the middle of the air path.
Way to be innovative, but I would be careful.
Way to be innovative, but I would be careful.
#7
Originally Posted by krismax
wouldnt that hurt haveing the runners still behind the TB?
#8
I said the same thing to him via email.
I'd really like to see the difference in airflow with the TB in the original location and the vias box location blocked.
Any chance you could try taking airflow measurements with that setup Stephen?
I'd really like to see the difference in airflow with the TB in the original location and the vias box location blocked.
Any chance you could try taking airflow measurements with that setup Stephen?
Originally Posted by 96sleeper
The factory TB mount is set up to deliver the same amount of air to all cylinders by gradually decreasing the size of the main channel until the last cylinder runner. By doing what you did, I would be worried about different cylinders running lean/rich in the setup. Since the main channel is the same size, the rear cylinders may not be getting the same airflow. It also looks like the flow would be very rough the the other cylinders because of the runners sticking up in the middle of the air path.
Way to be innovative, but I would be careful.
Way to be innovative, but I would be careful.
#9
Originally Posted by IceY2K1
I said the same thing to him via email.
I'd really like to see the difference in airflow with the TB in the original location and the vias box location blocked.
Any chance you could try taking airflow measurements with that setup Stephen?
I'd really like to see the difference in airflow with the TB in the original location and the vias box location blocked.
Any chance you could try taking airflow measurements with that setup Stephen?
#12
Originally Posted by Jeff92se
How did you manage to cut way into the manifold?
In case you're wondering, yes, I did cut all the way through to the last runner.
#14
Can I assume you are going to try and log MAF voltage data on a similar day to your previous run to get a more accurate assessment of whether this is worthwhile? Because based solely on the chart posted, I'd question the usefulness of the mod unless that 5300+ range is all that interests you. Because the losses look to outweigh the gains according to the MAF voltage.
#15
Originally Posted by Nealoc187
Can I assume you are going to try and log MAF voltage data on a similar day to your previous run to get a more accurate assessment of whether this is worthwhile? Because based solely on the chart posted, I'd question the usefulness of the mod unless that 5300+ range is all that interests you. Because the losses look to outweigh the gains according to the MAF voltage.
#18
He's running a Z32 MAF, which peaks at 5.14v and ~420whp supposedly. So, 4.5v is ~368whp and agrees with his latest 369whp dyno.
The A32 MAF peaks at ~290whp supposedly, so that means you'd be seeing enough air for ~274whp? How are you measuring? SAFC?
The A32 MAF peaks at ~290whp supposedly, so that means you'd be seeing enough air for ~274whp? How are you measuring? SAFC?
Originally Posted by TILLEYS99
What MAF are you running? im running stock MAF and at 7500 im hitting 4.85v
#19
Originally Posted by IceY2K1
He's running a Z32 MAF, which peaks at 5.14v and ~420whp supposedly. So, 4.5v is ~368whp and agrees with his latest 369whp dyno.
The A32 MAF peaks at ~290whp supposedly, so that means you'd be seeing enough air for ~274whp? How are you measuring? SAFC?
The A32 MAF peaks at ~290whp supposedly, so that means you'd be seeing enough air for ~274whp? How are you measuring? SAFC?
#20
Originally Posted by IceY2K1
He's running a Z32 MAF, which peaks at 5.14v and ~420whp supposedly. So, 4.5v is ~368whp and agrees with his latest 369whp dyno.
The A32 MAF peaks at ~290whp supposedly, so that means you'd be seeing enough air for ~274whp? How are you measuring? SAFC?
The A32 MAF peaks at ~290whp supposedly, so that means you'd be seeing enough air for ~274whp? How are you measuring? SAFC?
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