RWHP estimate
Thread Starter
Instructor
Joined: Aug 2009
Posts: 204
Likes: 4
From: Clear Lake City Texas
RWHP estimate
Looking for RWHP and TQ estimates for my '02 Z06 (6 speed, Twin disk clutch):
stock bottom end LS6, BTR Stage IV came; 235/242 .050" & 620 lift, Under drive pulley, LG 1.75" LT's, no cats with Corsa Extreme exhaust, 42# injectors, Fast 102 intake and T Body, LME massaged 243 heads (flow 310 intake & 235 exhaust).
I am hoping for 450-470 RWHP next week in Houston (better weather!)
What numbers can i expect to see from the parts listed on my Z?
Thanks for your comments
stock bottom end LS6, BTR Stage IV came; 235/242 .050" & 620 lift, Under drive pulley, LG 1.75" LT's, no cats with Corsa Extreme exhaust, 42# injectors, Fast 102 intake and T Body, LME massaged 243 heads (flow 310 intake & 235 exhaust).
I am hoping for 450-470 RWHP next week in Houston (better weather!)
What numbers can i expect to see from the parts listed on my Z?
Thanks for your comments
Thread Starter
Instructor
Joined: Aug 2009
Posts: 204
Likes: 4
From: Clear Lake City Texas
HP numbers are back from tuner: 465 RWHP AFR = 13.44
Got the numbers back from LMR in Houston, their Dyno the car made 464.81 RWHP, pleased with the parts on my car. The car sounds healthy or bigger at idle with the worked 243 heads and Fast 102 & TB.
The air fuel ratio was 13.44 (assuming this number is the average throughout run).
? - is this a good safe air fuel ratio for the street? I haven't picked up the car yet so i haven't driven it to get a seat of the pants opinion yet......
Thanks for your comments on the AFR.
The air fuel ratio was 13.44 (assuming this number is the average throughout run).
? - is this a good safe air fuel ratio for the street? I haven't picked up the car yet so i haven't driven it to get a seat of the pants opinion yet......
Thanks for your comments on the AFR.
Last edited by mikeb64; Nov 5, 2015 at 09:07 AM.
Le Mans Master
Joined: Aug 2007
Posts: 6,475
Likes: 297
From: Orange Park FL
Got the numbers back from LMR in Houston, their Dyno the car made 464.81 RWHP, pleased with the parts on my car. The car sounds healthy or bigger at idle with the worked 243 heads and Fast 102 & TB.
The air fuel ratio was 13.44 (assuming this number is the average throughout run).
? - is this a good safe air fuel ratio for the street? I haven't picked up the car yet so i haven't driven it to get a seat of the pants opinion yet......
Thanks for your comments on the AFR.
The air fuel ratio was 13.44 (assuming this number is the average throughout run).
? - is this a good safe air fuel ratio for the street? I haven't picked up the car yet so i haven't driven it to get a seat of the pants opinion yet......
Thanks for your comments on the AFR.
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Thread Starter
Instructor
Joined: Aug 2009
Posts: 204
Likes: 4
From: Clear Lake City Texas
Pit man- on the bottom of the dyno sheet, it is showing 13.44 on the far right. I am assuming it is an average AFR for the pull as I can see the AFR lower at slower speeds on the left side of the graph. I am not sure how to post the dyno graph on this site, could I email it to you?
what should be a normal or average AFR for this car with the mods it has?
Thank you
Mike
what should be a normal or average AFR for this car with the mods it has?
Thank you
Mike
Le Mans Master
Joined: Aug 2007
Posts: 6,475
Likes: 297
From: Orange Park FL
Pit man- on the bottom of the dyno sheet, it is showing 13.44 on the far right. I am assuming it is an average AFR for the pull as I can see the AFR lower at slower speeds on the left side of the graph. I am not sure how to post the dyno graph on this site, could I email it to you?
what should be a normal or average AFR for this car with the mods it has?
Thank you
Mike
what should be a normal or average AFR for this car with the mods it has?
Thank you
Mike
Boosted is a lot richer...11.xxx
Thread Starter
Instructor
Joined: Aug 2009
Posts: 204
Likes: 4
From: Clear Lake City Texas
Le Mans Master
Joined: Aug 2007
Posts: 6,475
Likes: 297
From: Orange Park FL
Safety Car
Joined: Aug 2011
Posts: 4,454
Likes: 412
From: Portland OR
Target is what makes the best power with NO knock retard.
My guess is they use a tailpipe sniffer.
They will show leaner than a sensor screwed into the exh pipe after the headers.
For instance, my C5 likes 12.2:1 at the torque peak leaning to 12.5 or so at 6500. At least that produced the best ET.
No clue what power it makes.
FWIW, on the dyno I don't see a big diff in HP when moving the AFR a few tenths of a point.
Timing has the biggest effect, but is tricky because you get into KR.
And lastly, the dyno AFR doesn't always hold true on the road......
Nice numbers. And nice guess Pitt!
My guess is they use a tailpipe sniffer.
They will show leaner than a sensor screwed into the exh pipe after the headers.
For instance, my C5 likes 12.2:1 at the torque peak leaning to 12.5 or so at 6500. At least that produced the best ET.
No clue what power it makes.
FWIW, on the dyno I don't see a big diff in HP when moving the AFR a few tenths of a point.
Timing has the biggest effect, but is tricky because you get into KR.
And lastly, the dyno AFR doesn't always hold true on the road......
Nice numbers. And nice guess Pitt!
Last edited by RonSSNova; Nov 6, 2015 at 01:20 AM.