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R

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Discussion Starter · #1 ·
I installed stage 1 and 2 intake pipes on my 2007 V last week. Prior to install I had the interior coated to reduce friction and eleminate any corosion threat. The install took about 3 hours. The engine cover will require modification to fit. To check HP increase a dynometer manufactured by Dyno Dynamics was used. The bench mark showed 356 RWHP (totally stock). After modifications the current rating is 394.9 RWHP. The engine sound is only slightly elevated at idle and up to ½ throttle. After that the supercharger can be heard. It is fantastic (if you like the whine of a supercharger). The improvement in acceleration is great. So far I am very pleased. I plan to open up the front like Bob did so it can breathe better. I will be taking it to the strip one day soon to see what the quarter mile time looks like. Lastly I want to thank all of the folks that came to RII for making me feel so welcome. The event was a real thrill.
Thanks
Terry
 
motorboat

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#3 ·
You guys got 443 hp and can get more, Thats not fair. :cry
I just wish there was something that would boost my mere 320 HP. :nodno
As we know right now there are no "chips" that will work without setting codes.
Maybe one day someone work on this motor.

Blaise
 
R

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Discussion Starter · #4 ·
redv said:
I installed stage 1 and 2 intake pipes on my 2007 V last week. Prior to install I had the interior coated to reduce friction and eleminate any corosion threat. The install took about 3 hours. The engine cover will require modification to fit. To check HP increase a dynometer manufactured by Dyno Dynamics was used. The bench mark showed 356 RWHP (totally stock). After modifications the current rating is 394.9 RWHP. The engine sound is only slightly elevated at idle and up to ½ throttle. After that the supercharger can be heard. It is fantastic (if you like the whine of a supercharger). The improvement in acceleration is great. So far I am very pleased. I plan to open up the front like Bob did so it can breathe better. I will be taking it to the strip one day soon to see what the quarter mile time looks like. Lastly I want to thank all of the folks that came to RII for making me feel so welcome. The event was a real thrill.
Thanks
Terry
Click to expand...
My final Dyno run (after cold air pipes and Dyno tune) showed 409.6 RWHP and 393.9 FP torque. Max torque was delivered at about 3800 rpm (pretty amazing). An XLRV was shown in the Sunday paper they called it "The Beautiful Beast", an appropriate name!!
 
P

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#5 ·
Given the 80% ratio between stock HP at the flywheel (443) and at the rear wheels (356) your 395 tuned HP at the RW means that the engine is now producing about 494 HP at the FW. That's a very cool 51 HP (or 11%) improvement.

Are you still using D3's plug-in ECM module or did you actually do a flash tune of the on-board ECM?
 
R

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Discussion Starter · #6 ·
Pegasus said:
Given the 80% ratio between stock HP at the flywheel (443) and at the rear wheels (356) your 395 tuned HP at the RW means that the engine is now producing about 494 HP at the FW. That's a very cool 51 HP (or 11%) improvement.

Are you still using D3's plug-in ECM module or did you actually do a flash tune of the on-board ECM?
Click to expand...

The cold air intake made such a dramatic difference in fuel/air and RWHP I felt it would be better for the engine to go with a conservative flash tune on the on- board system. After quite a few calls and internet search I was referred to a company specializing in GM tunes. I checked out some references and their shop and confirmed they had the software for the XLRV. Cost of tune $500. The resulting power and torque curves are very smooth. the tune added 10 RWHP for a total of 409.6 probably pushed the FW over 500. What a rush!!
 
deadringer

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#7 · (Edited)
redv said:
My final Dyno run (after cold air pipes and Dyno tune) showed 409.6 RWHP and 393.9 FP torque. Max torque was delivered at about 3800 rpm (pretty amazing). An XLRV was shown in the Sunday paper they called it "The Beautiful Beast", an appropriate name!!
Click to expand...
Wow! I got my D3 kit sitting on the floor here, and never installed it.... hoping I'd be able to get it dyno'd before I installed but, but now I don't think I'll wait.. sweet!
 
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#10 ·
D3 + Dyno Tune Results

I installed the D3 stage 1 & stage 2 intake and then had my car tuned on the Dyno, the results are: max hp at the rear wheels is 419.2 and the torque 398.9.
The temp was 90 with humidty 66%.
Needless to say I am very pleased with the results, as was the tuner who said he was quite impressed with the outcome. He used HP Tuner's software and when I dropped it off he said we should pick up 15 to 25 hp but after tuning he said this blowers really do perform well. This should equate to approx 524hp at the flywheel for a total pickup of 81hp.

larry

:party
 
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#14 ·
Larry:

Glad to hear that you achieved such impressive results after installing the D3 stage 1 and stage 2 intakes and had your ECM tuned using HP Tuners software.

A couple of questions (feel free to send me a private e-mail if you'd like):

1. Did you have a dyno run done after installing the D3 intakes but before tuning the ECM? What I'm interested in is how much of the improvement came from the intakes and how much came from the tune itself?

2. Do you know what adjustments your tuner made in specific areas such as air/fuel mixture, spark advance, shift patterns, etc.? I'm assuming he made several runs and made incremental adjustments to these and other factors to achieve maximum performance.

3. Did your tuner provide you with a copy of the file on a CD on your "base" tune as well as the file for the enhanced tune? Did you purchase your own copy of HP Tuners software?

4 Did you make any modifications in the stage 2 intake pipes - - specifically to coat or line them with any kind of rust inhibitor? I really wish that D3 would have fabricated their system out of aluminum, as they had originally planned, rather than steel.

It's great that we are finally starting to get some posts on this forum from people like you and RedV who are into the performance characteristics of this hot car. As we all know, the V comes from the factory with a very conservative tune and has much more potential than the stated 443 hp at the flywheel.

Thanks again and keep us posted.

Chuck
 
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#15 ·
D-3 intake & Dyno Tune

Chuck,

Sorry for the delay in responding to your questions pertaining to my 'V' with the D-3 intake and the Dyno Tune.

1. I did not do a base line on the car for Chuck had done his and I assumed it would be in the 354 to 356 range. We installed the intake pipes and didn't really want to spend the extra time to mess with just intakes and then have the tuner make the adjustments and Dyno again.

2. I do have the Dyno chart which does show the air/fuel adjustment but none of the other adjustments. I wanted a very conservative tune we were not trying to maxium everything as I didn't want to be on the edge of harming the engine or drive train.

3. I do not have a copy of the tune on a CD as we work with this tuner on all the Corvettes that we we add performance parts to. I did not purchase my own copy as he had a copy and only had to get HP to send him info for the Seimans computer as opposed to the Delphi that is on the Vettes.

4. I did not like the workmanship of the pipes as received from D-3 therefore I had them powder coated inside and out for when received they were alteady rusting on the inside. They state the are powdercoated but on the outside bur I feel the are simply painted for when we first powdered coated the original {paint} bubbled and we had to redone for a second time after bead blasting down to bare metal.

I am very pleased with the performance, as it now feels like a totally different car, probably cost me a couple mpg as it is impossible not to usr the extra powe and hear the slight sound of the supercharger.


Larry
 
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