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Dyno Discussion and Slips Discussion and a moderated "Dyno Slips" sub-forum to allow for posting of dyno slips.

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Old 02-09-2007, 01:33 PM   #1
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228HP/ 228TQ 2002 Auto with Headers.

Well I got my Cattman's headers installed and tune with the VAFCII. After I drove away I could tell the big difference.

My Maxima is runing 225HP/211TQ with:
Berk Intake, Cattman Headers, Cattman FastCat, Cattman Cattback.

I had my car Dyno last year in July, and made 202HP/200TQ with:
Injen Intake, Cattman Y-pipe, Cattman FastCat, Greddy Cattback.

I gain 23HP/ 11TQ with the Headers.

I never did a dyno run while stock, that was my mistake i should have done that first.

Here is my current dyno. I need to look for the A/F sheet. There was an accident inside my car last saturday night and had to take everything out and clean it. I will look for it when I get home from work today.



Here is my dyno from July.

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Old 02-09-2007, 03:11 PM   #2
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Nice Gains with the headers. But the TQ #s seem kinda of low especially on a Dynapack?
BTW what Gen are the cattman headers?
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Old 02-09-2007, 03:33 PM   #3
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I have the new set of cattman headers that just came out during December.
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Old 03-06-2007, 12:22 AM   #4
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nice gains...thats about 215-220whp on a dynojet...not too shabby for an auto...but i was looking more into the 230whp range...especially after you got it tuned...
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Old 03-07-2007, 02:03 PM   #5
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I thought it would around 230 too, the dyno operator said it's probably doing 230-235 in other dynos.

Now that you mention it, I'm curious now. I will see this weekend If can go to a different shop and get different dyno reading. To see if it's still in the same range, I will definitely keep the A/F sheet this time, I have no idea where the other is.

But that extra gain I got from the headers is beautiful. When I'm in the tollway at night heading home with no traffic I go WOT and love it.
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Old 03-07-2007, 02:44 PM   #6
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Make sure it's a DynoJet Model 248.

http://www.dynojet.com/maps/autodynos/tx.htm
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Old 03-07-2007, 02:58 PM   #7
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Quote:
Originally Posted by NmexMAX
Make sure it's a DynoJet Model 248.

http://www.dynojet.com/maps/autodynos/tx.htm
Actually I was thinking of taking it to Engine Logics cause is right by my cousin's house.

http://www.enginelogics.com/dyno.html

I'm checking that list right now.
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Old 03-07-2007, 03:03 PM   #8
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In order to compare to the majority of people on here, the DJ is best for that comparison. if you do go to a DJ...

http://forums.maxima.org/showpost.ph...9&postcount=19
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Old 03-07-2007, 03:30 PM   #9
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Quote:
Originally Posted by NmexMAX
In order to compare to the majority of people on here, the DJ is best for that comparison. if you do go to a DJ...

http://forums.maxima.org/showpost.ph...9&postcount=19
Does it have to be a 248? or can a 224x work just as good? There seems to be one 248 but it's a bit far away from where I am.
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Old 06-02-2007, 01:17 PM   #10
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Well this morning, I went to Carboy Racing in Houston to have my car dyno on a DynoJet. My first pull was 219.9 HP / 220.3, Benny who is the dyno operator was able to tune it and after the 7th pull he manage to make 228.8 HP/ 228.6 TQ.

I did feel the difference after the tune, the car takes of faster now. He did tell me there seems to be a problem at 3.9 RPM he could notfigure it out since he did not have much time analyzing the problem. I just went for a dyno and ended up doing a quick tune.

Here is the dyno sheet, sorry it a bit small I will try to make it bigger later today. Also as for the run files, I brought my USB but they could not do it. Their system was in a odd place and the only way to save was in a floppy. I will swing by them again porbably monday or tuesday and get the run files.

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Old 06-02-2007, 01:56 PM   #11
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Beautiful torque curve. What's happening @ 3900 RPM is the VIAS, don't worry too much about it. Go a little leaner (13.5) everywhere and get more power.

What gear was this in?
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Old 06-02-2007, 02:03 PM   #12
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He was in 3rd gear, I will let him know when I head back over there for another dyno after the spacer are installed. Can something be done about the VIAS?

With the headers my car was screaming when it was gettign near the redline, I thought my ears were gona pop lol.
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Old 06-02-2007, 02:45 PM   #13
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Not really, it's just the nature of the engine and it's intended design.

You are making pretty good power up top

How the hell did it not downshift @ 3k in 3rd?
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Old 06-02-2007, 08:07 PM   #14
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Quote:
Originally Posted by NmexMAX
Not really, it's just the nature of the engine and it's intended design.

You are making pretty good power up top

How the hell did it not downshift @ 3k in 3rd?
Oh ok, when he said there was something going on there. I thought it was something bad that needed to be fix. He did shifted from 1st to 2nd and 3rd.
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Old 06-02-2007, 09:33 PM   #15
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Do you have any future plans/mods?
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Old 06-03-2007, 07:22 AM   #16
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Many more, I got the spacer and BBK coming my way. Well the BBK may take a little longer. But my next major mod was either getting a VB mod with a TQ converter http://sgpracing-store.stores.yahoo....raupvabof.html or a whole new transmission http://sgpracing-store.stores.yahoo....praautrup.html.

I know in those links are for the 350 but when I talked to the owner he said they could do it for the max and the it would cost just be a bit less.
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Old 06-03-2007, 12:09 PM   #17
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Have you looked into the larger MAF housing mod?
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Old 06-03-2007, 01:54 PM   #18
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I know people change their MAF since the 2k2 goes out easily, thanks goodness mines still working perfectly. Also I read people change their MAF from 2K1. As fas a bigger housing, you talking about the AM600 MAF??
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Old 06-03-2007, 02:05 PM   #19
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Nope...This link will shed some light.

http://forums.maxima.org/showthread.php?t=517758
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Old 06-03-2007, 04:05 PM   #20
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I see what your saying now. Now I'm guessing thats the Bosch 82mm MAF in your pic?

Quote:
Originally Posted by SR20DEN
You don't need the Z32 MAF because you have a better option than that. Bosch makes a 82mm MAF that can be found on BMW V8s, Ferrari F360s and Land Rovers using BMW V8s. These things are $400 new from BMW but only $100 new from Range Rover. Your stock 5th gen MAF sensor will perfectly bolt right into the 82mm MAF with no problems.
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Old 06-03-2007, 07:48 PM   #21
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It sure is. I've actually changed my set-up recently and hope to dyno sometime soon.

Seems as if you have everything in place (VAFCII for correction) so, it's all a matter of buying, installing, and tuning.
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Old 06-03-2007, 08:11 PM   #22
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Could you please link me where can i get this maf? I tried google and bosch auto part site and can not find it.

I'm thinking of doing this this weekend coming up with my spacer and a re-ture. Well I'm hoping to get my car back from the dealership in time. I taking it back Monday morning to have the bumper re-painted since its starting to crack, even tho this was a brand new paint job.

Thanks,
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Old 06-03-2007, 08:59 PM   #23
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www.car-part.com.

http://www.bba-reman.com/content.asp...da_vw_vauxhall
http://www.partsgateway.co.uk/sitemap/maf-sensors.html
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Old 06-05-2007, 05:00 PM   #24
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Thanks for the links,

Also I got the run files anyone wants to see.

First Run

7Th Run
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Old 06-05-2007, 06:41 PM   #25
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Nice numbers:

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Old 06-07-2007, 06:52 AM   #26
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eh dyno doesnt really matter.....numbers will always vary between dynos...its all about the increase through tuning. as long as you always use the same dyno its straight.
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Old 06-07-2007, 07:13 AM   #27
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Quote:
Originally Posted by XJinCT
eh dyno doesnt really matter.....numbers will always vary between dynos...its all about the increase through tuning. as long as you always use the same dyno its straight.
Not sure where that came from, but his dynos look strong for an auto and he sdid gain in one session from tuning. Also, this does give a rough dyno to dyno comparison (different type)

His latest is an dynojet, where we can roughly compare between other cars on the site. Correction factor helps us level the playing field as much as we can, even though there is still a fudge factor between dynos. ( )
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Old 06-07-2007, 01:11 PM   #28
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Quote:
Originally Posted by NmexMAX
Nice numbers:


Which dynojet viewer your using b/c I can't seem to see the A/F ratio. I'm using dynojet runviewer 7.0.1.0
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Old 06-07-2007, 06:28 PM   #29
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Quote:
Originally Posted by XJinCT
eh dyno doesnt really matter.....numbers will always vary between dynos...its all about the increase through tuning. as long as you always use the same dyno its straight.
Right, numbers will different between dynos, but i gives me an estimate of HP/TQ and I can definitely feel the increase in power from the tune and mods I done.

Quote:
Originally Posted by NmexMAX
It sure is. I've actually changed my set-up recently and hope to dyno sometime soon.

Seems as if you have everything in place (VAFCII for correction) so, it's all a matter of buying, installing, and tuning.
So you no longer have a the 82mm MAF mod going? If so my I ask why you changed it?

--

Well I got my spacer from NissanWorks, and I gona have installed this Saturday and going for another Dyno to see if anything changes there. I can't wait lol. So I should have some new run files late Saturday.
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Old 06-07-2007, 11:07 PM   #30
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Quote:
Originally Posted by Utsutsu


So you no longer have a the 82mm MAF mod going? If so my I ask why you changed it?
Wouldn't do that for the world. I still have it integrated into the stock airbox.

Quote:
Originally Posted by speed racer
Which dynojet viewer your using b/c I can't seem to see the A/F ratio. I'm using dynojet runviewer 7.0.1.0
Look in the upper left corner of the screen and it will show an option of a 1, 2, or 3 section display. Use your imagination from there.
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Old 06-08-2007, 06:42 AM   #31
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Nice numbers
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Old 06-09-2007, 01:01 PM   #32
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I just got my car dyno again with the spacer, I made 230 HP/ 230TQ.
When I get home I will post the dyno sheet.
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Old 06-09-2007, 06:18 PM   #33
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So, you gained only 1 hp and 2 ft/lb? Are you using something to control the A/f?
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Old 06-10-2007, 02:44 PM   #34
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In for runfiles.

And yes, if you had read the entire thread, he has a VAFC.
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Old 06-30-2007, 04:15 PM   #35
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Sorry I took a while to post the run, I been really busy this past weeks and did not even had a chance post any info.

But here it is my run with the spacers on.

11th Run
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Old 08-06-2007, 09:19 AM   #36
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Quote:
Originally Posted by Utsutsu
Sorry I took a while to post the run, I been really busy this past weeks and did not even had a chance post any info.

But here it is my run with the spacers on.

11th Run
What do I use to open your dyno run file?
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Old 08-06-2007, 10:44 AM   #37
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Quote:
Originally Posted by bladerunr
What do I use to open your dyno run file?
http://www.dynojet.com/downloads/software.aspx
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