put car on the dyno last night - Ford Mustang Forums : Corral.net Mustang Forum
 
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post #1 of 14 Old 02-14-2009, 01:49 PM Thread Starter
 
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put car on the dyno last night

well the 352 motor 70mm turbo stayed together last night, i had to take it to a local dyno here in east texas before i hauled it up to dallas 2.5 hours away, i needed to know im not gonna be wasting my time and money when i go,
it made 339hp 356 torque up to 5700 rpms, between 3300 and 4600 it was 10.0 on the air fuel and before 3300 like 11.3 and after the 4600 up to 5700 it was good, so for some reason the maf or the computer is telling it to dump a lot of fuel, should be able to take it in a couple of weeks to gearheads in arlington to get the rest of the power im expecting,
18 degrees locked out timing and 33lbs of fuel pressure on the regulator,
it almost idles too

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post #2 of 14 Old 02-14-2009, 02:32 PM
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Shouldnt you be closer to 39lbs on the regulator? How much boost did it see on the dyno? I'm guessing you have a base tune?

To give you an idea i made like 323 hp not getting over 4k rpms with a base tune with combo listed below on my 1st pull.


Stock block, GT40 heads, Explorer intake, 67mm, 10lbs, 431HP 497TQ on 110 octane. 12.01 @ 123
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post #3 of 14 Old 02-14-2009, 11:47 PM Thread Starter
 
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we tried 39 and it was rich the whole time, yeah it is a base tune, i have 42lb injectors with a maf to match the motor is 347 stroker bored .040 over with a super t70 turbo, i have a 10lb spring in it and i didnt have the boost guage hooked up due to running the line to the fuel regulator from the intake the guy with dyno said to do that to make sure it was reading boost he didnt trust the stock vacuum lines, so im not sure how much boost i do know the wastegate never opened,
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post #4 of 14 Old 02-15-2009, 09:21 AM
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well the 352 motor 70mm turbo stayed together last night, i had to take it to a local dyno here in east texas before i hauled it up to dallas 2.5 hours away, i needed to know im not gonna be wasting my time and money when i go,
it made 339hp 356 torque up to 5700 rpms, between 3300 and 4600 it was 10.0 on the air fuel and before 3300 like 11.3 and after the 4600 up to 5700 it was good, so for some reason the maf or the computer is telling it to dump a lot of fuel, should be able to take it in a couple of weeks to gearheads in arlington to get the rest of the power im expecting,
18 degrees locked out timing and 33lbs of fuel pressure on the regulator,
it almost idles too
This is typical when using a draw thru maf in a blow thru configuration. The voltage output from the maf is higher for the same amount of airflow when you blow thru the maf compared to drawing air into it. My guess is this maf will likey peg depending on what the calibration is. You may need to add a maf extender when you go to get it tuned.

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post #5 of 14 Old 02-15-2009, 05:22 PM Thread Starter
 
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is the maf extender something the dyno shop will have or do i need to get it before i go
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post #6 of 14 Old 02-15-2009, 10:29 PM
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If the shop you are taking it to is just adjusting your FP to tune your engine than I would find another shop.

You shouldn't have 33psi of FP.

What is your combo? Your HP sounds a bit low.
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post #7 of 14 Old 02-16-2009, 12:38 AM
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Something is wrong.

You should be making over 500rwhp with a 347 and 10psi T-70

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post #8 of 14 Old 02-16-2009, 01:07 AM
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Not a t-70...a super t-70. I think those have a 61mm wheel. Way small for a 350ci motor.

'67 coupe, blow-thru 351w S475, C4/C5, 8.8 6.38 at 110, 9.99 at 135
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post #9 of 14 Old 02-16-2009, 01:09 AM Thread Starter
 
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i am taking it somewhere else, that was just to get a base tune without the computer tuned or a chip burned,
it better make over 500 if doesnt on boost i will spray it im sure it will love a 75 shot
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post #10 of 14 Old 02-16-2009, 11:14 AM
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Originally Posted by brianj5600 View Post
Not a t-70...a super t-70. I think those have a 61mm wheel. Way small for a 350ci motor.
I agree that is way to small


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post #11 of 14 Old 02-16-2009, 12:42 PM
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I made over 500RWHP with my 352 and 5-6 psi.
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post #12 of 14 Old 02-16-2009, 02:41 PM
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I made over 500RWHP with my 352 and 5-6 psi.
What brand turbo was it?

'67 coupe, blow-thru 351w S475, C4/C5, 8.8 6.38 at 110, 9.99 at 135
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post #13 of 14 Old 02-16-2009, 08:15 PM
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PT GTS 76

At that low boost level the turbo was way out of its range. It didn't start to get going to 10-12psi than all hell broke loose.
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post #14 of 14 Old 02-20-2009, 12:38 PM
 
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yea, you should be making alot more hp. I have a 67 trim turbo 03 gt, with a stock motor pulling 419hp. I use a diablo mafia maf to adjust so that it doesnt peg or dump fuel. Keep in mind this is on 9.92 lbs of boost.
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