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Old 01-08-2008, 12:10 AM   #1
Shock24Z
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Angrysk8r's Turbo 3400 Dyno

Dyno:




I don't know what numbers the dyno guy was going buy but he said "it would make around 230 on a dyno jet" and "it should be putting around 280 at the crank" ... Call bs if you like, I didn't come up with those numbers... but the guy does own a dyno. Also, this pull was done in 2nd gear (to reduce stress on drivetrain) which i'm told makes less power than in 3rd. Feel free to use your own numbers and discuss why they're correct as I would like to hear discussion on it. Ricer excuses aside, this car is already faster than LOTS of grand am's will ever be, and was done so with just 1200$. I personally feel this feat should be noted by the rest of the community so people realize that there is some potential in a 3400 (without spending a lot).
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Old 01-08-2008, 12:27 AM   #2
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ha downshift fail!

but yea, the guy there said there is generally a 20% or so difference from the mustang dyno and the dynojet dyno that happened to be closed that day (apparently he's dyno'd several cars on both dynos and averaged it). Factor in that and then assume 80-85% drivetrain efficiency and I should have an estimated 280 ft/lbs torque and 250 hp at the flywheel. I may take it to the dynojet eventually and see what the difference is. low budget builds ftw!


update from dynojet pulls



Last edited by angrysk8r; 01-13-2008 at 11:21 PM.
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Old 01-08-2008, 05:19 AM   #3
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Nice numbers. Yeah, I've heard mustang dyno's typically are a little lower than dyno jets, but didn't think it was a 20% difference. Drivetrain loss is typically 18-20% so that's right. He should have dyno'd in third gear though. Drivetrain stress??? WTF is he talking about? It won't harm the drivetrain any more in third than it would in second, and third gear gives a longer pull for more resolution and accuracy, and is generally just easier to calculate since it's a 1:1 ratio. Next time have him dyno it in third.
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Old 01-08-2008, 08:30 AM   #4
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Quote:
Originally Posted by AaronGTR View Post
, and third gear gives a longer pull for more resolution and accuracy, and is generally just easier to calculate since it's a 1:1 ratio.
Agreed, but I do think it depends on your shift points. My initial dyno's were done in 3rd gear but WOW... it took forever to hit 6800 rpm. After comparing a few 3rd vs 2nd gear pulls, I only saw about a 1-2hp difference. 3rd is optimal and also allows you to see (easier) any possible fueling issues. I personally don't like 3rd due to the amount of time it takes to get to my desired rpm.

Gratz on the results! Very impressive for such a low budget!!

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Old 01-08-2008, 10:14 AM   #5
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Nice job man.
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Old 01-08-2008, 11:06 AM   #6
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Thanks for the advice, when I get a chance to go to the dynojet I'll definitely do a 3rd gear pull, I wasn't too sure about the drivetrain stress but I was running low on time and had to get to work so I took him at his word.

I guess that 20% difference between dynos is something he said he went and tested himself with a couple different vehicles. I honestly have no idea if that's accurate or not, although I did look around online and found that depending on the mustang dyno you should see anywhere from a 10-20% difference.
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Old 01-08-2008, 12:01 PM   #7
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have u got 1/4 mile times
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Old 01-08-2008, 12:52 PM   #8
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have u got 1/4 mile times
No, and kearney is a long drive.
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Old 01-08-2008, 01:04 PM   #9
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nice stuff. way to rep the SE's. looking forward to seeing what you run at the track.
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Old 01-08-2008, 01:45 PM   #10
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tyte...... Can you get a scan of your ENTIRE dyno sheet by chance?
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Old 01-08-2008, 05:00 PM   #11
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Quote:
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tyte...... Can you get a scan of your ENTIRE dyno sheet by chance?
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Old 01-08-2008, 05:13 PM   #12
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nice

1200 thats not bad at all....if u dont mind me asking what all did u get for that?
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Old 01-08-2008, 06:56 PM   #13
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I'm curious at what points you were going lean.
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Old 01-08-2008, 08:55 PM   #14
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I don't have a camera w/ me atm, but I was lean near the very beginning at 3200 rpm when I first started going wot, then the afr got more rich as the rpm's and boost went up. Basically just a way to battle the KR. Soon I may get a meth injection and do some wideband tuning so I can have a little more consistent afr, but as long as I'm running rich instead of lean I'm not too worried.

as for bigstrib's question, the 1200 accounts for basically everything in the build. The turbo, intercooler, intercooler piping, exhaust piping, flanges, oil lines, bov, injectors, etc. You can really get the most out of your money when you know how to weld and tune and do the entire build yourself.

Depending on if I have time I should be able to head to the dynojet thursday and do a few baseline runs. Another thing I noticed today when driving to work was that the coupler attached to the turbo was coming off and I've been leaking boost. I'm not sure if it started coming off when I was doing my dyno runs but I'll have that back on for the dynojet. I'll also try to remember to take the powrtuner and log the run so you guys can take a look at it.

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Old 01-09-2008, 07:05 AM   #15
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Your actually running way to rich. 10:1 ratios don't help anything, in fact they will contribute to KR due to carbon buildup.
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Old 01-09-2008, 01:38 PM   #16
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Quote:
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Your actually running way to rich. 10:1 ratios don't help anything, in fact they will contribute to KR due to carbon buildup.
on ****ty pump gas I'd say 11.5:1 - 12.0:1 would be something to shoot for.
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Old 01-09-2008, 10:53 PM   #17
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You're actually running way to rich. 10:1 ratios don't help anything, in fact they will contribute to KR due to carbon buildup.
Narrowband tuning FTL
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Old 01-09-2008, 11:24 PM   #18
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Damn...$1,200 for a 5hp increase. You could have gotten at LEAST a 20hp increase with a "Turbo" badge and a couple NOS stickers.
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Old 01-10-2008, 02:17 AM   #19
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They dyno 140-145 stock, on mustang dynos anyway. Eddy current dynos are more consistant (I have seen .3 hp between runs MAX before). WHP is not Crank HP, or advertised HP.

I don't believe its 20% between mustang and dynojet. Well, not between the equipment anyway. The operator is another story. I would say your car needs some work to hit its full potential. That is about 10whp more power than an 11:1-11.5:1 3400 with 75mm TB, 3500 upper, .539 lift 230s duration cammed 3400 makes. Your paper looks identical to the ones I have scanned from the local speed shop.
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Old 01-10-2008, 02:28 AM   #20
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Damn...$1,200 for a 5hp increase. You could have gotten at LEAST a 20hp increase with a "Turbo" badge and a couple NOS stickers.
fail
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