Upgraded to D-1SC
08-07-2006, 08:28 AM
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Upgraded to D-1SC Due to a small issue with my pulley bolt coming loose (& then breaking off in the shaft when I tired to remove it) I upgraded from a P to a D-1SC. After waiting for "only" a month for ATI to rebuild the head unit, I finally got it back Saturday. 
Initial results seem promising. I was making 549/612 at the tires with the P @ 8 psi at 6700 rpm. With the new setup I was making 10 psi @ 6k, 12 @ 6300 & 14 @ 6500 during tuning runs. (& smoldering my Hoosier DRs) I hope to dyno it tomorrow, but without the Alky system that Julio is sending me later this week, I figure I'll only be around 600/675. After I get that kit & re-tune, I'm hoping to hit 650/725.
Right now I can't go past 14* of timing @ WOT. The IATs are reading below 120*, but I doubt it's accuracy where it's installed in the alum ATI plenum. I need to get the 85mm MAF installed to get the IAT into the airstream. The good news is the Racetronix fuel pump & 60lb inj's are keeping up.
The car feels a lot stronger, and hits earlier, so I'm hoping I can run low 10s in my barge when it's all said & done. I'll post some numbers tomorrow. And new track times after Friday (tho I probably won't push it until the following week).
Initial results seem promising. I was making 549/612 at the tires with the P @ 8 psi at 6700 rpm. With the new setup I was making 10 psi @ 6k, 12 @ 6300 & 14 @ 6500 during tuning runs. (& smoldering my Hoosier DRs) I hope to dyno it tomorrow, but without the Alky system that Julio is sending me later this week, I figure I'll only be around 600/675. After I get that kit & re-tune, I'm hoping to hit 650/725.
Right now I can't go past 14* of timing @ WOT. The IATs are reading below 120*, but I doubt it's accuracy where it's installed in the alum ATI plenum. I need to get the 85mm MAF installed to get the IAT into the airstream. The good news is the Racetronix fuel pump & 60lb inj's are keeping up.
The car feels a lot stronger, and hits earlier, so I'm hoping I can run low 10s in my barge when it's all said & done. I'll post some numbers tomorrow. And new track times after Friday (tho I probably won't push it until the following week).
08-07-2006, 11:13 AM
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The upgrade is right at $1300, & includes a new impeller, bearings & seals.
And I'd be VERY pleased if I gained that much power kp. Since I picked up ~150 with 8 psi, I figured 1/2 of that again at 12 psi would be reasonable. I ordered a 3.85 pulley to replace the one I destroyed, but ATI didn't send it to me. So I ended up with a 3.45", which was all I could find locally on a Saturday afternoon. And I have the ATI 7.5" (or is it 7.75?) crank pulley on my SFI damper. So 6500rpm is my upper limit now, tho my engine made power to 7k with the small blower.
And I'd be VERY pleased if I gained that much power kp. Since I picked up ~150 with 8 psi, I figured 1/2 of that again at 12 psi would be reasonable. I ordered a 3.85 pulley to replace the one I destroyed, but ATI didn't send it to me. So I ended up with a 3.45", which was all I could find locally on a Saturday afternoon. And I have the ATI 7.5" (or is it 7.75?) crank pulley on my SFI damper. So 6500rpm is my upper limit now, tho my engine made power to 7k with the small blower.
08-07-2006, 01:31 PM
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Yeah, that 3.4x is kinda spooky. It spools up pretty quick! 
But I'll just have to control it with eng rpm until my 3.85 gets here (ATI is shipping it now....)
But I'll just have to control it with eng rpm until my 3.85 gets here (ATI is shipping it now....)
08-07-2006, 04:53 PM
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Originally Posted by kp
4 more lbs of boost should get you 100 more rear wheel HP or so, that will help 
What size pulleys are you running?
What size pulleys are you running? Trending Topics
08-07-2006, 05:21 PM
#8
Originally Posted by Funkybird
Is that just a general rule of thumb or is that including the upgrade to a d1sc? Because I want to do the same thing but go from 6psi to about 12-15
Now taking a P1 and overspinning to get four more PSI probbaly wouldnt see half that. Best thing to do is just try it, cant go wrong there
08-08-2006, 05:43 AM
#10
It's good to see you got your head unit back! Keep an eye on fuel pressure, we norammly see twin in tank pumps handle approx 600 rwhp, after that we have to add larger fuel lines and fuel rails. Bob
08-08-2006, 07:40 AM
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Thanks for your help Bob! And I will keep an eye on the fuel pressure. When you put in duals, do you have to mod the bucket? Mine sucks dry now if I go WOT with less than 1/2 tank of gas! What does that setup with the rails cost? I don't see it on your site.
And yes, I have an Aero 1000 boost referenced pressure reg, with the ATI in-line pump. Not sure that pump really does anything, but it's working, so I'm leaving it alone. The pressure is around 70 at idle, drops down to 55 or so at max tq, and then climbs back up to around 60 at redline.
The inj duty cycle tracks the pressure. When I go WOT it's around 60%, at max tq it's around 87%, then comes back down to 80. So I am right on the edge. Not sure what affect the meth kit will have (make it better or worse or no change?).
And yes, I have an Aero 1000 boost referenced pressure reg, with the ATI in-line pump. Not sure that pump really does anything, but it's working, so I'm leaving it alone. The pressure is around 70 at idle, drops down to 55 or so at max tq, and then climbs back up to around 60 at redline.
The inj duty cycle tracks the pressure. When I go WOT it's around 60%, at max tq it's around 87%, then comes back down to 80. So I am right on the edge. Not sure what affect the meth kit will have (make it better or worse or no change?).
Last edited by WAHUSKER; 08-08-2006 at 07:45 AM.
08-08-2006, 04:03 PM
#13
I'll be interested to see your new numbers. How do you make so much torque when most people are reporting higher HP numbers than torque, and you are making the opposite? Is it the 402?
Jim
Jim
08-08-2006, 04:11 PM
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Originally Posted by DeltaT
Is it the 402?
2000 Red WS6 A4
SDPC Forged 402, ATI P-1SC, Cam Motion Custom Cam, Ported 6L heads, LSX, Racetronix, 60lb Motrons, Speed Secrets 4L60E, Pro Yank 3200 Extreme, Moser 9" w/3.70s, Hoosier 335 DRs
549rwhp, 612rwtq SAE @ 7psi; 10.86@128.7mph, 1.5 60' @ 4000lbs
SDPC Forged 402, ATI P-1SC, Cam Motion Custom Cam, Ported 6L heads, LSX, Racetronix, 60lb Motrons, Speed Secrets 4L60E, Pro Yank 3200 Extreme, Moser 9" w/3.70s, Hoosier 335 DRs
549rwhp, 612rwtq SAE @ 7psi; 10.86@128.7mph, 1.5 60' @ 4000lbs
08-08-2006, 04:12 PM
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you know...after I posted the above, I realized that you may have just been asking if the 402 was the reason for the increased torque...if so...I apologize...
08-08-2006, 07:37 PM
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Originally Posted by DeltaT
I'll be interested to see your new numbers. How do you make so much torque when most people are reporting higher HP numbers than torque, and you are making the opposite? Is it the 402?
Jim
Jim
08-09-2006, 07:44 AM
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Originally Posted by XLR8NSS
Probably a combination of the 402 and a unlocked converter?
Yesterday I put down 598 rwhp & 728 rwtq!
And that is with some definite issues. The air inlet is certainly a restriction on a D-1SC @ 12 psi+ as Bob from EPP said it would be. And the fuel system has reached it's limit. The hp was climbing pretty good until 5000 rpm where it started to taper off. It was flat before it reached 6k, and over that it dropped.I figure the leveling off at 5k is due to the plastic ATI air inlet hat. If I hadn't had fueling issues I was going to pull it off on the last run & see what it did.
But at 6k my fuel pressure dropped from over 50 psi to 40. Enough said about that. I need to upgrade to either dual Walbro pumps or a big-a$$ single, and bigger fuel rails & lines.
All this proves is I built the car for the P-1SC. I never planned on upgrading to a D this year. If anyone is thinking about doing this be warned, it requires significantly more. So I'll have to re-do all that over the winter, and change some other stuff as well.
Anyway, I'll throw the 3.85 pulley on it (IF it gets here in time) and go see if I can run 10.50s on Friday. Maybe some 10.0s will happen next year.....
08-09-2006, 08:36 AM
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With the methanol from Julio you should be fine. You be able to drop you injector duty cycle down some and that will bring your pressure back up and then use the progressive gains on the controller to get you afr right. Methanol is so nice
08-09-2006, 08:44 AM
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Originally Posted by wicked_95z
With the methanol from Julio you should be fine. You be able to drop you injector duty cycle down some and that will bring your pressure back up and then use the progressive gains on the controller to get you afr right. Methanol is so nice