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395rwhp stock boost

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Old Jul 1, 2004 | 11:45 AM
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Default 395rwhp stock boost

Just got her tuned to 6 psi and we finished with 395 rwhp(475.9HP) and 369.93 ft lb torq. I have the stock cats, but they will be replaced soon enough which should give me about 415-420 rwhp with stock boost.. those stock cats are crazy restrictive!

Dyno Sheet

Last edited by ZainT; Jul 1, 2004 at 11:48 AM.
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Old Jul 1, 2004 | 11:53 AM
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wow great # for 6 psi. But I'm a little weary fo the A/F creeping up from 5K up. Most are not hitting 400 rwhp till around 8 psi.
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Old Jul 1, 2004 | 11:59 AM
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I agree....you are running dangerously lean at the top end. Richen it up a bit and you'll have about 350-375 clean safe HP.
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Old Jul 1, 2004 | 11:59 AM
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yea after that run we changed the settings just a tad and everything is fine highest it gets too after 5k is 12.7
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Old Jul 1, 2004 | 12:16 PM
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You WILL need to re-tune after the hiflo cats...
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Old Jul 1, 2004 | 12:39 PM
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12.7 is still about 1 point too high above 5000 rpms if you ask me. Also, how much timing are you taking out?

--Steve
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Old Jul 1, 2004 | 01:10 PM
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I would tune to 11.5 to be safe.
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Old Jul 1, 2004 | 01:11 PM
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Originally posted by ZainT
yea after that run we changed the settings just a tad and everything is fine highest it gets too after 5k is 12.7
Whew... way too lean.

Like everyone is saying, getting that thing SUB 12s...
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Old Jul 1, 2004 | 01:35 PM
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I dont think they took any timing out..since he is running stock boost levels. Correct me if I am wrong Zain.
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Old Jul 1, 2004 | 02:04 PM
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Originally posted by gq_626
I dont think they took any timing out..since he is running stock boost levels. Correct me if I am wrong Zain.
Yea, they didn't take any out, but even at stock boost you think 12.7 is too high? and it was at 12.7 at 6600rpms.

I am not exactly sure of the effect with .7 over the safe zone...
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Old Jul 1, 2004 | 02:49 PM
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Did you install this kit? Who dynoed it your installer? I wonder about dyno operators these days, letting cars run mad lean like that. Man don't boost at all.
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Old Jul 1, 2004 | 03:27 PM
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That's extremely lean.
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Old Jul 1, 2004 | 03:33 PM
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Originally posted by ZainT
Yea, they didn't take any out, but even at stock boost you think 12.7 is too high? and it was at 12.7 at 6600rpms.

I am not exactly sure of the effect with .7 over the safe zone...

Yes, at any boost level, 12.7 is too lean. 12.7-13:1is what I'd shoot for if I was N/A.

You ideally wanna be at about 11.5:1 across the board. Of course, there will likely be a natural slope from 13.1 to 11.5, but you should be in the 11.5 range by about 4000rpm or so.

I am honestly very surprised a professional tuner would give you the car and tune it like this. I would try to find another tuner that knows F/I....I get kinda scared just looking at the A/F.

Good luck and ask if you have any other questions.

HTH
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Old Jul 1, 2004 | 04:10 PM
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No timing retard and an A/F of over 12.5 @ 400 rwhp??

tick. tick. tick. tick.

--Steve
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Old Jul 1, 2004 | 04:14 PM
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Since when did lightspeed get a dyno? They used to do some work on my supra back when it was white/black. (a long time ago) Hue/John is a pretty cool guy. I remember I could barely even pull my car into the garage it was so small.

You better go back and make sure you are at least below 13, 12 would be better without any timing taken out. From the graph it looked like you were higher than 14 and without any timing taken out, that is crazy.

It will be nice to see another fast SS Z on the streets of St. Louis. I have seen your car a couple times at Moore. Hopefully I will see it at Gateway as well.
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Old Jul 1, 2004 | 06:29 PM
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They had 3 lifts and sold one to make room for the dyno... what you mean too small? maybe they moved.. there is plenty of room in there they fit 10 cars in there by the end of the day.

No it wasn't ever higher than 14.. 13.8 by 6600rpm.. you see me around? you should say hi then :P don't be a stranger btw have you heard/been here?
Gateway Z Club

you should check it out! we have a show coming up July 11. Would love to have another F/I 350z in the club!

They also said the A/F ratio's are more than fine.. 12.7 was only that was because of the intercooler spray... I made them dyno it again to prove to me that I wasn't too lean and this time without spray ... 93 degrees with a high of 11.2 A/F after 3300rpm putting out 377rwhp at stock boost still. So don't worry they didn't tune it wrong

Last edited by ZainT; Jul 1, 2004 at 06:37 PM.
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Old Jul 1, 2004 | 07:03 PM
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"Did you install this kit? Who dynoed it your installer? I wonder about dyno operators these days, letting cars run mad lean like that. Man don't boost at all."

Lol, too true Bill too true. Yeah timing retard and more fuel or it's the big bang theory.

I'm still not sure what the deal is with these dyno numbers being the final say on how a car will perform man....

Go race that beast in the heat like that and you will be towed home. Seriusoly , trying to help.
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Old Jul 1, 2004 | 07:52 PM
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Zain,

Where did they place the wideband? Sometimes if you place it in the tail pipe won't have a tight seal the AFR could be off. Proper placement would be before the cat. I see on the chart that your AFR is super lean at 3000 rpms. I'm sure that's not correct. Therefore I suspect its just improper placement of their wideband. What does a stock 350 dyno at there?
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Old Jul 2, 2004 | 06:26 AM
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They also said the A/F ratio's are more than fine.. 12.7 was only that was because of the intercooler spray...

So you are running an IC spray as well? NOS? I would still be worried about 12.7 AFR. HP at sacrifice of safety can cost alot of $$$.
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Old Jul 2, 2004 | 03:37 PM
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looks like a base run kinda of chart....if it were me, start simple.

1. do you have an upgraded fuel pump?
2. are you running colder plugs (1 step colder than stock)
3. you need to take timing away from 4500 and up...I'd start at arou d 2 degrees, tapering to about 6 degrees of retard by redline.....that should calm that AFR curve way down so it hovers near the 12 mark or lower. You've got an EGT gauge I see, so between that and the wideband, you'll get a pretty good idea as to when you have pulled too much timing.

if you can, psot the dyno sheet up of the 377 hp run (no NOS IC spray)
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