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Just got back from the dyno and am completely disappointed. Did the tuner mess up or is this all I am going to get? A4 car
parts list:
fast 92 w/ speed density and slp lid
fast fuel rails
42lb injectors
2.5 5.3 prc Texas speed heads
ms3 cam 238/242
1 3/4 headers straight piped
it does have a loose converter
dyno shows 347hp & 340 torque
Last edited by Road_House; Jun 5, 2018 at 05:45 PM.
something is seriously wrong, parts? combo? tuning? not sure, but that is just barley above stock HP/TQ..
Cam is a little too big imho - you dont need that much duration on a stock compression ls1, lose too much dynamic compression..
Also i'd run 1 7/8 headers and tru-duals
I'd run a smaller cam and find a different tuner.
i made 400/400 on a stock short block ls1 with LS6 heads and Ls6 intake with a 224 cam.
Last edited by SRT8.Acelleration; Jun 5, 2018 at 06:29 PM.
something is seriously wrong, parts? combo? tuning? not sure, but that is just barley above stock HP/TQ..
Cam is a little too big imho - you dont need that much duration on a stock compression ls1, lose too much dynamic compression..
Also i'd run 1 7/8 headers and tru-duals
I'd run a smaller cam and find a different tuner.
i made 400/400 on a stock short block ls1 with LS6 heads and Ls6 intake with a 224 cam.
I was thinking you meant that, but thought id ask to be sure lol. Yeah thats odd. How does it run, idle, etc?
runs ok, when idling it gets down to about 600rpm. When I gassed on it, it redlined to 6500rpm and stuck there for a second or two, doesn't seem to shift when it should be under wot
something is seriously wrong, parts? combo? tuning? not sure, but that is just barley above stock HP/TQ..
Cam is a little too big imho - you dont need that much duration on a stock compression ls1, lose too much dynamic compression..
Also i'd run 1 7/8 headers and tru-duals
I'd run a smaller cam and find a different tuner.
i made 400/400 on a stock short block ls1 with LS6 heads and Ls6 intake with a 224 cam.
has 10.8/1 -11/1 compression, forget which. Also the 1 3/4 are true duals
Well, this could all be BS, if the dyno was not set up properly then your readings will be wrong, either high or low. This could be just a miscalibrated dyno.... garbage in, garbage out...
find another shop and try again, there is noway that vehicle made that low HP/TQ unless something is really wrong..
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Bad dyno tuner? 
