Very Dissapointed with dyno results today...
05-08-2006, 06:22 PM
#81
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Originally Posted by The Dragon
Losing close to 20 on your set-up from the cats alone.
Gaining some back from the bump in compression.
Wait a minute . . . do you have cats or not??? O2'S deleted in the back??
Gaining some back from the bump in compression.
Wait a minute . . . do you have cats or not??? O2'S deleted in the back??
05-08-2006, 06:26 PM
#82
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Then they are giving you a LOT of restriction for no reason other than noise.
Something is definitely mechanically wrong; you aren't even above 350 tq except for 4700 to 5500 rpm's
Stick your head in the engine bay with the car idling; what does it sound like? Stand on each side of the engine.
Something is definitely mechanically wrong; you aren't even above 350 tq except for 4700 to 5500 rpm's
Stick your head in the engine bay with the car idling; what does it sound like? Stand on each side of the engine.
05-08-2006, 06:41 PM
#84
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Originally Posted by The Dragon
Then they are giving you a LOT of restriction for no reason other than noise.
Something is definitely mechanically wrong; you aren't even above 350 tq except for 4700 to 5500 rpm's
Stick your head in the engine bay with the car idling; what does it sound like? Stand on each side of the engine.
Something is definitely mechanically wrong; you aren't even above 350 tq except for 4700 to 5500 rpm's
Stick your head in the engine bay with the car idling; what does it sound like? Stand on each side of the engine.
The car isnt missing, runs great, sounds good, no abnormal sounds. The only code that was in the PCM when it was sent off was a heater performance code for the front O2's.
I dont know a lot of the details on the tune...but I do have the EFIlive file.
05-08-2006, 07:07 PM
#85
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I have edit and efilive but I normally tune with Edit. I could look at your file but I gotta figure out how to open it with the efi :o
What fuel pump do you have? I used Racetronix with excellent results.
What fuel pump do you have? I used Racetronix with excellent results.
05-08-2006, 08:11 PM
#88
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Josh,
The first thing I would look at is a data log from EFI live, etc. during a dyno run..... it should show approx 300 g/sec airflow @ 6000 RPM (about 9600 - 10000Hz maf freq.). If it doesn't, then you are not getting any air to move through the engine.... it's an engine/induction/exhaust problem. If it is that high, you likely have a parasitic power loss problem somewhere in the drivetrain..... diff/brakes/driveshaft/trans/etc.
Oh.... btw, I had a car here that dynoed w/ OK a/f but was out of inj.... when we put larger ones in, it picked up 10 HP. I know it's not the 60-80 we're looking for, but it's part of it.
Brian
HiTech Motorsport
The first thing I would look at is a data log from EFI live, etc. during a dyno run..... it should show approx 300 g/sec airflow @ 6000 RPM (about 9600 - 10000Hz maf freq.). If it doesn't, then you are not getting any air to move through the engine.... it's an engine/induction/exhaust problem. If it is that high, you likely have a parasitic power loss problem somewhere in the drivetrain..... diff/brakes/driveshaft/trans/etc.
Oh.... btw, I had a car here that dynoed w/ OK a/f but was out of inj.... when we put larger ones in, it picked up 10 HP. I know it's not the 60-80 we're looking for, but it's part of it.
Brian
HiTech Motorsport
05-08-2006, 08:29 PM
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Originally Posted by HTMtrSprt
Josh,
The first thing I would look at is a data log from EFI live, etc. during a dyno run..... it should show approx 300 g/sec airflow @ 6000 RPM (about 9600 - 10000Hz maf freq.). If it doesn't, then you are not getting any air to move through the engine.... it's an engine/induction/exhaust problem. If it is that high, you likely have a parasitic power loss problem somewhere in the drivetrain..... diff/brakes/driveshaft/trans/etc.
Oh.... btw, I had a car here that dynoed w/ OK a/f but was out of inj.... when we put larger ones in, it picked up 10 HP. I know it's not the 60-80 we're looking for, but it's part of it.
Brian
HiTech Motorsport
The first thing I would look at is a data log from EFI live, etc. during a dyno run..... it should show approx 300 g/sec airflow @ 6000 RPM (about 9600 - 10000Hz maf freq.). If it doesn't, then you are not getting any air to move through the engine.... it's an engine/induction/exhaust problem. If it is that high, you likely have a parasitic power loss problem somewhere in the drivetrain..... diff/brakes/driveshaft/trans/etc.
Oh.... btw, I had a car here that dynoed w/ OK a/f but was out of inj.... when we put larger ones in, it picked up 10 HP. I know it's not the 60-80 we're looking for, but it's part of it.
Brian
HiTech Motorsport
Ill have to try my buddies 7.400" pushrods and see how it changes anything if any.
05-08-2006, 09:25 PM
#92
Originally Posted by The Dragon
Your statements are misleading.
His car is down close to 80 rwhp . . . maybe more with a proper tune.
If it's a fueling problem . . . then it's a problem with the injectors, pump, etc. getting into the chamber; not duty cycle.
Again, you mislead in your post. We're not just looking for his car to make the "most power" possible . . . he's not down 10 or 20 ponies here dude . . . +80 horsepower is a mechanical problem that is HUGE. Far more than duty cycle.
And 10 degrees of timing ain't gonna find that power
I've been tuning for over 5 years and moderate on a tuning site. He's got a problem somewhere.
His car is down close to 80 rwhp . . . maybe more with a proper tune.
If it's a fueling problem . . . then it's a problem with the injectors, pump, etc. getting into the chamber; not duty cycle.
Again, you mislead in your post. We're not just looking for his car to make the "most power" possible . . . he's not down 10 or 20 ponies here dude . . . +80 horsepower is a mechanical problem that is HUGE. Far more than duty cycle.
And 10 degrees of timing ain't gonna find that power
I've been tuning for over 5 years and moderate on a tuning site. He's got a problem somewhere.
05-08-2006, 09:27 PM
#93
Originally Posted by HOSS
Sewing machine sound? You need longer PR's
05-08-2006, 10:00 PM
#94
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Well looks like I have a lot of checking to do...heres whats on the list:
-Replace TR55's with TR6's gapped to .045".
-Perform cylinder compression test (cranking)
-Perform cylinder leakdown test
-Try 7.400" pushrods
-Do some logging to watch Injector DC, knock, and other parameters
-Replace TR55's with TR6's gapped to .045".
-Perform cylinder compression test (cranking)
-Perform cylinder leakdown test
-Try 7.400" pushrods
-Do some logging to watch Injector DC, knock, and other parameters
05-09-2006, 12:28 PM
#95
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If you checked with a PR length checker, and your pre-load is correct, it's not the PR's. I would double check a couple of them for pre-load again though.
I doubt the plug change will do anything for your problem, but a good idea to run the TR6's.
Do the compression and leak down test to rule out those items and do some logging.
If your TB is hitting the bump stop, your getting full WOT.
I doubt the plug change will do anything for your problem, but a good idea to run the TR6's.
Do the compression and leak down test to rule out those items and do some logging.
If your TB is hitting the bump stop, your getting full WOT.
05-09-2006, 12:49 PM
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Originally Posted by The Dragon
Losing close to 20 on your set-up from the cats alone.
Gaining some back from the bump in compression.
Wait a minute . . . do you have cats or not??? O2'S deleted in the back??
Gaining some back from the bump in compression.
Wait a minute . . . do you have cats or not??? O2'S deleted in the back??
Last edited by TeEnAgE pHeNoM; 05-09-2006 at 12:55 PM.
05-09-2006, 12:55 PM
#97
Originally Posted by DanZ28
If you checked with a PR length checker, and your pre-load is correct, it's not the PR's. I would double check a couple of them for pre-load again though.
05-09-2006, 01:25 PM
#98
Originally Posted by Abdullah
i would still try the 7.400" PR's just to rule them out if they are not the reason because 7.325" PR's seem to be too short.
05-09-2006, 03:55 PM
#100
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Originally Posted by WS6FirebirdTA00
do you know the plunger depth on those lifters?
I'm thinking the 7.400" pushrods wont do much for me....either way, I'll pull the valve covers off anyway and measure them again this weekend when I do the leakdown and compression testing.