Dyno tune results....WOW
Race Director
Joined: Dec 2000
Posts: 19,304
Likes: 85
From: San Diego CA
Re: Dyno tune results....WOW (Carsnob)
Can someone explain this to me? I would have expected another 20-30rwhp from his mods.
I know all dyno's are different and altitude/temp may be a factor, but I have to ask... Are automatics really that much more inefficient than manual transmission cars? Is my car just really strong? OR does the auto not have a 1:1 gear to run in and have to run in a slight O/D condition?
Reason I ask is I put down those numbers with just a vararam and stingers while running a bit warm (about 200*). It was done in Mobile, AL (close to sea level) and about 75* outside.
Something just doesn't add up to me???????
I know all dyno's are different and altitude/temp may be a factor, but I have to ask... Are automatics really that much more inefficient than manual transmission cars? Is my car just really strong? OR does the auto not have a 1:1 gear to run in and have to run in a slight O/D condition?
Reason I ask is I put down those numbers with just a vararam and stingers while running a bit warm (about 200*). It was done in Mobile, AL (close to sea level) and about 75* outside.
Something just doesn't add up to me???????
Pro
Joined: Oct 2002
Posts: 522
Likes: 0
From: Ridgeland MS
Re: Dyno tune results....WOW (Dave68)
Not trying to hijack, but what is the conversion factor for STD to SAE corrected.
Reason I ask is a buddy of mine just got his 4.6 GT blown and puts down about 363rwhp/357rwtq (which seems low to me). We dyno'd on the same dyno. I would like to send his "corrected" numbers to him.
Reason I ask is a buddy of mine just got his 4.6 GT blown and puts down about 363rwhp/357rwtq (which seems low to me). We dyno'd on the same dyno. I would like to send his "corrected" numbers to him.
Safety Car
Joined: Nov 1999
Posts: 3,891
Likes: 2
From: Houston, TX
Re: Dyno tune results....WOW (c5 devil)
Hey C5 Devil,
Glad we could help and glad that we could get that much out of your car. I will try and get a scan of your dyno graphs today for you or at least take a digital pic of them to post.
These numbers are on a Dynojet Dyno and are SAE corrected. There is a good gain through the WHOLE dyno graph as you will see. The car has better throttle response now and more power at any RPM.
If you have any questions or would like talk about tuning your car, I would be happy to help. As was stated, we spent a few hours tuning his car. Unlike most shops, we will tune until everything is perfect, no matter how long it takes.
Glad we could help and glad that we could get that much out of your car. I will try and get a scan of your dyno graphs today for you or at least take a digital pic of them to post.
These numbers are on a Dynojet Dyno and are SAE corrected. There is a good gain through the WHOLE dyno graph as you will see. The car has better throttle response now and more power at any RPM.
If you have any questions or would like talk about tuning your car, I would be happy to help. As was stated, we spent a few hours tuning his car. Unlike most shops, we will tune until everything is perfect, no matter how long it takes.
Burning Brakes
Joined: Dec 2002
Posts: 977
Likes: 0
From: N/A
St. Jude Donor '06-'09
Re: Dyno tune results....WOW (c5 devil)
I have a question regarding tuning. When getting an engine which is basically stock (Blackwing and PRTs) tuned to get those last few HP out of it does this negatively affect the longterm reliability? And what about GM warranty? I was considering getting mine tuned, but these issues concern me.
Thanks.
[Modified by JNS, 5:01 PM 4/15/2003]
Thanks.
[Modified by JNS, 5:01 PM 4/15/2003]
Melting Slicks
Joined: Aug 1999
Posts: 3,452
Likes: 3
From: Spring, TX
Re: Dyno tune results....WOW (JNS)
The major adjustments for the tune is that the C5 runs pretty rich with the stock fuel curves. Tuning leans the fuel curve out, gets more aggressive with timing advance and I think it reworks the torque management parameters.
This does not affect the reliability of the car at all. In fact your fuel milage should go up. I have never heard of waranty claim denied because of computer tuning.
This does not affect the reliability of the car at all. In fact your fuel milage should go up. I have never heard of waranty claim denied because of computer tuning.
Pro
Joined: Oct 2002
Posts: 522
Likes: 0
From: Ridgeland MS
Re: Dyno tune results....WOW (JNS)
b
I wouldn't worry about getting your car tuned with that few mods done. Wait 'till you are close to the end of your plan. You don't want to spend that kind of money twice.
I have a question regarding tuning. When getting an engine which is basically stock (Blackwing and PRTs) tuned to get those last few HP out of it does this negatively affect the longterm reliability? And what about GM warranty? I was considering getting mine tuned, but these issues concern me.
Thanks.
Thanks.
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