Dyno Numbers
10-03-2005, 06:02 PM
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Dyno Numbers Well after getting to the shop. I was told the Dynojet wasn't working and all they had was a Mustang Dyno . 
Even though the Mustang Dyno read lower, its actually better for tuning. Soo...........
I could only get 7# of boost. Not the 10-12 I was hoping for. (Time for a smaller blower pulley)
And running really rich 11:1. I ended up with:
550.5 RWHP - 505 RWTQ - 7# Mustang Dyno
605.55 RWHP - 555.5 RWTQ - 7# DynoJet :dunno:
And what I understand. These numbers are about 10% lower than a DynoJet. So I think I hit my 600 RWHP mark. :dunno:
Does anyone make a smaller blower pulley than a 3.4?
Even though the Mustang Dyno read lower, its actually better for tuning. Soo...........
I could only get 7# of boost. Not the 10-12 I was hoping for. (Time for a smaller blower pulley)
And running really rich 11:1. I ended up with:
550.5 RWHP - 505 RWTQ - 7# Mustang Dyno
605.55 RWHP - 555.5 RWTQ - 7# DynoJet :dunno:
And what I understand. These numbers are about 10% lower than a DynoJet. So I think I hit my 600 RWHP mark. :dunno:
Does anyone make a smaller blower pulley than a 3.4?
Last edited by Ed Blown Vert; 10-04-2005 at 09:45 PM.
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10-03-2005, 08:16 PM
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Originally Posted by JAMES RODRIGUEZ
Nice numbers. You can get a smaller pulley from ATI. You just need to call them.
10-03-2005, 08:17 PM
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Originally Posted by mike m
11.1 isnt real rich for a blower setup. I think its just right. Thats where mine is. Good to see you got the car back up and running. Good Luck with it.
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10-03-2005, 09:14 PM
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Nice #'s. 
BTW, that printout shows a Dyno Dynamics dyno. It is similar to a Mustang, however there aren't too many comparisons out there between it and a Dynojet dyno. I have heard though that it will read 10-12% less than a Dynojet (inertia). Did you have a chance to use the load portion of that dyno to tune? They (Dyno Dynamics) are incredible dynos for steady state tuning.
BTW, that printout shows a Dyno Dynamics dyno. It is similar to a Mustang, however there aren't too many comparisons out there between it and a Dynojet dyno. I have heard though that it will read 10-12% less than a Dynojet (inertia). Did you have a chance to use the load portion of that dyno to tune? They (Dyno Dynamics) are incredible dynos for steady state tuning.
10-03-2005, 09:20 PM
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Originally Posted by TXNC5
Nice #'s.
BTW, that printout shows a Dyno Dynamics dyno. It is similar to a Mustang, however there aren't too many comparisons out there between it and a Dynojet dyno. I have heard though that it will read 10-12% less than a Dynojet (inertia). Did you have a chance to use the load portion of that dyno to tune? They (Dyno Dynamics) are incredible dynos for steady state tuning.
BTW, that printout shows a Dyno Dynamics dyno. It is similar to a Mustang, however there aren't too many comparisons out there between it and a Dynojet dyno. I have heard though that it will read 10-12% less than a Dynojet (inertia). Did you have a chance to use the load portion of that dyno to tune? They (Dyno Dynamics) are incredible dynos for steady state tuning.
10-03-2005, 09:32 PM
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Yeah, if you have a need to tune or verify your tune, I would recommend going back there. If you have HPT or EFILive, make a AFR scan table with RPM as the columns and MAP as the rows. Use the dyno in load mode. It is amazingly consitent if you set it to hold the engine at any given speed. Then you simply throttle up & down to get all the MAP points you can for that speed. Loosen the load (i.e. go to the next column), and use the throttle again. I have done a few LSx cars on one, and I can go through the entire VE table in about 15 minutes with plenty of samples from each cell.
10-04-2005, 12:28 AM
#11
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I can't imagine needing more than the 3.4 with the sdce setup.
Make sure you have enough tension and are not getting belt slip.
On a 370ci motor with stage III heads and a decent cam the 3.4 made 14psi I believe it was and 687 rwhp. That was a D1 blower though.
It's either slipping or you have a leak somewhere if your only seeing 7psi IMO. I know the P1 is the little brother but it should make at least 11 on that motor I would think.
Make sure you have enough tension and are not getting belt slip.
On a 370ci motor with stage III heads and a decent cam the 3.4 made 14psi I believe it was and 687 rwhp. That was a D1 blower though.
It's either slipping or you have a leak somewhere if your only seeing 7psi IMO. I know the P1 is the little brother but it should make at least 11 on that motor I would think.
10-04-2005, 12:36 AM
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I'll check tomorrow, but I was sure I would have hit 10#. Looking at the graph, I don't see the boost dropping off at all. I did stop the run @ 6200
10-04-2005, 06:06 AM
#14
You'll want to keep your air/fuel ratio no leaner than 11.5/1 on that eddy current dyno. 22 degrees of timing is quite a bit, I'm surprised you didn't encounter spark knock. You could experiment with backing off the timing to 18 degrees, and lean it out to 11.5/1. Bob
10-04-2005, 08:17 AM
#15
i think those numbers are great Ed.considering you did it on a mustang dyno and at only 7#s.....you told me you wanted anywhere from 12-15#s for 600rwhp and you prolli would have done it on a dyno jet @ almost half the psi.plus the motors still prolli breaking in,how many miles you have on it?great numbers btw 
10-04-2005, 08:24 AM
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your timing is a bit high, but as long as you got no spark knock i guess you're ok.
Do you have the ability to datalog and take it on the street?
Don't worry about numbers so much , how does it feel?
personally I think tuning on a mustang is better cause it puts more load on the engine.
Do you have the ability to datalog and take it on the street?
Don't worry about numbers so much , how does it feel?
personally I think tuning on a mustang is better cause it puts more load on the engine.
10-04-2005, 10:09 AM
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Originally Posted by Exotic Performance Plus
You'll want to keep your air/fuel ratio no leaner than 11.5/1 on that eddy current dyno. 22 degrees of timing is quite a bit, I'm surprised you didn't encounter spark knock. You could experiment with backing off the timing to 18 degrees, and lean it out to 11.5/1. Bob
But I thought it was 11.5 on a dynojet and 12.0 on a mustang dyno?
Originally Posted by ddnspider
i think those numbers are great Ed.considering you did it on a mustang dyno and at only 7#s.....you told me you wanted anywhere from 12-15#s for 600rwhp and you prolli would have done it on a dyno jet @ almost half the psi.plus the motors still prolli breaking in,how many miles you have on it?great numbers btw
Lets see, I think I only have 100 miles on the motor. Erick said there is no break-it period.
Last edited by Ed Blown Vert; 10-04-2005 at 01:11 PM.
10-04-2005, 04:37 PM
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I threw back in the stock idle and part-throttle tuning. Then adjusted for the injectors and LTFT's. Drop the idle back down to 750, idles fine and cruises great.
Next time I am going to spin the engine higher. Erik says the bottom end will hold to 7500
But said just shift @ 6800
But I will probably just take it to 6500 or when my power drops off.
Where is your motor?
Next time I am going to spin the engine higher. Erik says the bottom end will hold to 7500
But said just shift @ 6800But I will probably just take it to 6500 or when my power drops off.
Where is your motor?
Last edited by Ed Blown Vert; 10-04-2005 at 04:58 PM.
