dyno results hurt!!
dyno results hurt!! went to ed wright auto in tulsa. and tuned and dyno ran for about 6 hours. results are unsatisfying for me and ed. ed definately knows his **** though. i will put that out there for anyone needing to know a good lt1 tuner
---383ci LT4 with AFr 220 heads and lt4 RPM intake
---ATI procharger at 10psi
---3500 stall
---4l80e manual valvebody trans
---moser 9" with 3.60 gears and locker
---aeromotive fuel system
---hooker long tubes
ed did tell me to hook my wideband up and definately adjust spark gap down to .035 from .045.
we definately know it is not running out of fuel
from the dyno chart it definately doesnt look like a misfire would be occuring. doesnt sound like a misfire. but i know for a fact that a stock 383 will make 400 RWHP.
with my combination already with that information should be enough to tell everyone that i should be making more than 375RWHP and 378RWTQ please any input would be greatly appriciated please post or email pyronotic138@yahoo.com or catch me on aim pyronotic138.
---383ci LT4 with AFr 220 heads and lt4 RPM intake
---ATI procharger at 10psi
---3500 stall
---4l80e manual valvebody trans
---moser 9" with 3.60 gears and locker
---aeromotive fuel system
---hooker long tubes
ed did tell me to hook my wideband up and definately adjust spark gap down to .035 from .045.
we definately know it is not running out of fuel
from the dyno chart it definately doesnt look like a misfire would be occuring. doesnt sound like a misfire. but i know for a fact that a stock 383 will make 400 RWHP.
with my combination already with that information should be enough to tell everyone that i should be making more than 375RWHP and 378RWTQ please any input would be greatly appriciated please post or email pyronotic138@yahoo.com or catch me on aim pyronotic138.
Last edited by pyronotic138; Mar 17, 2009 at 01:15 AM.
Sounds like you're a solid 100rwhp off to me, anyways, with that Procharger. I think you're right that on motor you should be near the 400 mark, but you are running through one heavy-***, power-robbing drivetrain. It's almost like the blower is just there for looks.
thats what sucks. heh. he told me that i should be in the upper 500 to even upper 600. which is why i built it like this. and now i cant get anything out of it.
any idea of what to do
any idea of what to do
the only reason i did this combo is because of the amount of power that this WAS supposed to have. lol. i will definately do a compression check. when we were at eds though. he got the AFR perfect for the running conditions. but anywho. any other opinions
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Did Ed tune it, or did you just go there to dyno? Were you logging the runs? We had AK95ta's car on the rollers last year and the knock sensors were picking up the blower. It was pulling 14 degrees of timing. We could see exactly when it happened in the log. We knew that the motor was in good working order, and played with the knock retard settings. It went from like 390 to 500+. He is on here if you want to ask him about it.
Edit:Reading comprehension owns me. I re-read the op and saw that Ed tuned it. Sounds like it's time to move on to a mechanical issue.
Edit:Reading comprehension owns me. I re-read the op and saw that Ed tuned it. Sounds like it's time to move on to a mechanical issue.
Last edited by jmill96Z; Mar 17, 2009 at 04:23 PM.
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What cam did you install and did you degree it in to verify the VE's? I would make sure you do not have a blown head gasket or any vacuum leaks. Are you sure your rings are sealing? Maybe a couple injectors are not firing. Does everything sound oK?
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From: Gateway International Raceway
What was the optimum AFR that you mention? +1 on knock causing or other cause, pulling timing, something to check regardless. Locked converter? 1:1 gear pull on the dyno (which gear is 1:1 in a 4L80E, 4th?)? If not then could be that the dyno ran in the wrong gear.
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From: Gateway International Raceway
Danggg. Something is off. +2 to the timing issue, and the only thing that could possibly rob your combo of more hp would be a th400. Take her to the track and see what she runs? Your combo should put down some bad *** times!!!
-Shane
-Shane
specs are as follows.
hydaulic roller comp cams-- .532 intake .546 exhaust
duration at .050----------- 232 intake 239 exhaust
114 LSA
cam installed at 110 degree centerline
1.5 roller rockers
8.0 static compression
383 CI LT4
10psi ATI P600B
AFR 220 heads 74cc combustion chambers
2.08x1.60 valves
-28cc dished pistons
please let me know if you need anything else spec wise. also attached is the dyno
dyno run was made in 3rd gear at a 1.1 ratio gearing on the 4l80. hits 10psi boost at 6000rpm
hydaulic roller comp cams-- .532 intake .546 exhaust
duration at .050----------- 232 intake 239 exhaust
114 LSA
cam installed at 110 degree centerline
1.5 roller rockers
8.0 static compression
383 CI LT4
10psi ATI P600B
AFR 220 heads 74cc combustion chambers
2.08x1.60 valves
-28cc dished pistons
please let me know if you need anything else spec wise. also attached is the dyno
dyno run was made in 3rd gear at a 1.1 ratio gearing on the 4l80. hits 10psi boost at 6000rpm
you and me and ed and all my friends all thought that. which is mind boggling. like i said if anyone has input. highly appriciated. i will try some **** on it though that i have read up so far. and thanks to the ones that have put something down already