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Wounding if the numbers are low or if I was just expecting to high
LQ9
799s ported/milled.030
LSX454 cam 236/246 110lsa
Fast 102 LSXRT
Cheap 1³/⁴ headers
42lb (ls3) injectors
Powerbond Underdrive pulley
the car made 400hp/311tq through a 4k yank 4l80e and 4.10s gears on a mustang dyno any thoughts open to all questions and opinions.
Thanks in advance.
Stall, gears and dyno are all working against you, but they do seem low to me. your tq is way low. How is the tune?
The tuner has a real good rep. He knows his stuff but I want to say I'm at 28* and the car runs great and drives fine, tuner did say that my valves might be a tad to long (7.375) but I don't know if that's costing me that much power
Take it to the track and see what MPH it traps. Itll tell the real story. Dynos are for tuning... not for real world performance.
Will do, I was close to buying a custom cam after seeing the numbers it put down. On the phone with the vendor and he said the same take it to the track if I can creep into the mid 11s n/a @117 120ish I'll be satisfied
The tuner has a real good rep. He knows his stuff but I want to say I'm at 28* and the car runs great and drives fine, tuner did say that my valves might be a tad to long (7.375) but I don't know if that's costing me that much power
Hopefully someone with more knowledge than me will chime in soon but I’m still surprised by that low tq number. Most LQ4/9 builds I see on here are 370+
Originally Posted by K!ssmySS
Will do, I was close to buying a custom cam after seeing the numbers it put down. On the phone with the vendor and he said the same take it to the track if I can creep into the mid 11s n/a @117 120ish I'll be satisfied
Whats your raceweight? It took the numbers in my sig to go mid 11s at 120 in a full weight fbody.
Plenty of cars out there that go the other way......Dynoed 475+ rwhp but trap 115 mph
I dynoed 396whp through a Yank Pt4000 but trapped 122 mph on a badly hurt tranny that would smack the limiter a couple times before each shift. Not a doubt in my mind it will trap 125+ this season. Full weight F-Body
Hopefully someone with more knowledge than me will chime in soon but I’m still surprised by that low tq number. Most LQ4/9 builds I see on here are 370+
Whats your raceweight? It took the numbers in my sig to go mid 11s at 120 in a full weight fbody.
Plenty of cars out there that go the other way......Dynoed 475+ rwhp but trap 115 mph
I dynoed 396whp through a Yank Pt4000 but trapped 122 mph on a badly hurt tranny that would smack the limiter a couple times before each shift. Not a doubt in my mind it will trap 125+ this season. Full weight F-Body
Time slip > dyno numbers
I hope she runs good at the track after a few motor passes I'll spray a 75 shot (all I can get away with) but on the street will see how the 150 makes it move
Cam is not a good match for your intake/combo imo.
I was looking a good shelf cam but hard to go aggressive since I have to worry about PTV with the heads being milled I called Smallwood to cut me a cam and he told me to run it first he thinks it's a good setup and will do well but a new cam is still in the picture as of now been looking at the ms3 or some custom options
You know my numbers are not much less than yours and we have a very similar setup. Mods in Sig, the torque number doesn't seem right at all to me though.
On a dynojet with an unlocked torque converter I made 380/373. I am going to make a post here in a bit in this if you want to see the graph and video.
You know my numbers are not much less than yours and we have a very similar setup. Mods in Sig, the torque number doesn't seem right at all to me though.
On a dynojet with an unlocked torque converter I made 380/373. I am going to make a post here in a bit in this if you want to see the graph and video.
yea thats no problem. I changed the pushrods out got some shorter ones and idk if it's me but the car sound better idles alot better I got the idle down from 980-1000 to a smooth 850 with no problem... waiting on a set of speed engineering 1⁷/⁸ LT's and my tuner to check everything over in the tune then back to the dyno
UPDATE!!! Sorry for the wait took some time off the car to 80e swap my tbss, took car to the track last night 1st pass 11.38 @119 1.69 60ft... 2nd 11.20 @118 1.54 60ft car is 3660 with me in it, I only could get 2 runs in but back to HP/TQ so after the track I used the ET calculator to figure out how much power the car supposedly has (using the 11.20 pass) like I stated above the car dynoed on a mustang dyno with drag radials if that makes a difference and only put up 400, the calculator came up with 460hp what are you guys thoughts on that. Does the times match the 460hp or is that about what a 400hp car runs at that weight
Thanks for your input
UPDATE!!! Sorry for the wait took some time off the car to 80e swap my tbss, took car to the track last night 1st pass 11.38 @119 1.69 60ft... 2nd 11.20 @118 1.54 60ft car is 3660 with me in it, I only could get 2 runs in but back to HP/TQ so after the track I used the ET calculator to figure out how much power the car supposedly has (using the 11.20 pass) like I stated above the car dynoed on a mustang dyno with drag radials if that makes a difference and only put up 400, the calculator came up with 460hp what are you guys thoughts on that. Does the times match the 460hp or is that about what a 400hp car runs at that weight
Thanks for your input
Exactly where you should be. You should NEVER compare one dyno to another, especially not one type to another. Mustang dynos can be calibrated, but historically they are known to be heartbreakers, which appears to be the case here. 1/4 mile HP using your #s, and the calculator has more data behind it. This one shows you having around 470 at the crank: http://wallaceracing.com/hpcalculatorquarter.php
Exactly where you should be. You should NEVER compare one dyno to another, especially not one type to another. Mustang dynos can be calibrated, but historically they are known to be heartbreakers, which appears to be the case here. 1/4 mile HP using your #s, and the calculator has more data behind it. This one shows you having around 470 at the crank: http://wallaceracing.com/hpcalculatorquarter.php
Good deal I'm happy with how the car runs and feels thinking about going with a 26" tire to brake in the 10s possibly
01-28-2021, 11:45 PM
H/C/I LQ9 low dyno numbers ? 
