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Hey guys, I'm looking for dyno sheets with similar modifications except for the ports. I'm attempting to build an engine with as much torque as possible... but still make decent power (based on an S5 13B-T)
Currently I'm leaning towards stock ports with the runners cleaned up a bit.
I agree with you. Look up greddy turbo dynos. A guy used a very similar setup but street ported and retuned. Gained some hp (~20 iirc) but lost at least that much torque as well...
I agree with cleaned up stock ports. Look up greddy turbo dynos. A guy did a dyno then street ported his motor searching for hp and lost a good bit of torque. Gained some hp (~20 iirc) but lost at least that much torque as well...
Stock port s4 With t04s t4 divided 60-1 p-trim turbo (Should be easy to find à streetport t04s dynosheet). We delayed the boost alittle and thereby tourqe not to break the unpinned s4 keg.....this is à low boost 15psi pump gas run on à safe tune
Last edited by rx7jocke; Jun 26, 2015 at 03:32 AM.
That dyno isn't going to help except to illustrate this point.
We delayed the boost alittle and thereby tourqe not to break the unpinned s4 keg
If you want low end power on a turbo rotary, step one is spool the turbo. Getting to 15psi at 4,000rpm is not conducive to making low end power.
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Here is my smaller .60AR T04B compressor cover (10% less flow) 60-1 @12psi boost on my ported S5 TII with S4 8.5 rotors. Porting is near stock closing, early opening intake and stock closing, early opening exhaust ports. Full boost @ ~3,500rpm whatever boost was run.
It makes ~20hp more at 3,000rpm than rx7jocke above, probably only because it was spooling harder. On 14psi boost it made same 380rhwp as rx7jocke.
Because of my porting the 60-1 stopped making peak power at 16psi/390rwhp and just filled in area under the curve with more boost added after that. More engine flow = less boost per turbo flow.
This turbo spooled much better before I ported the manifold/exhaust housing up to the WG runners huge to stop the boost creep it had.
Last edited by BLUE TII; Jun 26, 2015 at 04:35 PM.
Thanks for the equations, but I hope that was for clarification to others.
Blue TII was correct...
I guess I percieved intent behind the question wrong.
Where I live, people tend to think torque is king and HP is a useless number (truck country!).
I told a customer one time "If I apply 20 ft. lbs of toque to a wrench and a bolt doesn't move, I have made no horsepower and no work has been done" and that dude just stared at me, lol. He was asking about what I thought about exhaust modification and whether I thought torque or horsepower was more important.
silver88 something has a ported s5 with s360 turbo. I have a non ported s5 with same turbo. Issue.... I tried to go 15 psi on 93 pump and now i have low compression. SO i dont have a full 15 psi map to compare only a 7 psi. althought my 15 psi map shows boost curve and was stopped at before redline. gotta post with phone
I guess I percieved intent behind the question wrong.
Where I live, people tend to think torque is king and HP is a useless number (truck country!).
I told a customer one time "If I apply 20 ft. lbs of toque to a wrench and a bolt doesn't move, I have made no horsepower and no work has been done" and that dude just stared at me, lol. He was asking about what I thought about exhaust modification and whether I thought torque or horsepower was more important.
I understand. I live in an area like that as well, but Im not in that same category. Thanks for clarifying to others that may read this thread though.
