Your opinion please: anything wrong with this downpipe design?
#1
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Your opinion please: anything wrong with this downpipe design?
Do you see anything wrong with this downpipe? Is it too restrictive? The wastegate outlet seems too small and angled to me? Is it going to affect anything?
#7
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Thanks guys. It's 2.5" from here onwards. I will get it redone.
I posted a separate thread on missing 60bhp.
https://www.miataturbo.net/engine-performance-56/where-my-top-end-power-60335/
Other than what was suggested in the thread, could this be the reason? Does it make that much of a difference between a shitty outlet and a well designed one?
I posted a separate thread on missing 60bhp.
https://www.miataturbo.net/engine-performance-56/where-my-top-end-power-60335/
Other than what was suggested in the thread, could this be the reason? Does it make that much of a difference between a shitty outlet and a well designed one?
#9
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No it was a different downpipe that flows a lot better. But there we other variables such as changing headgasket and running cops.
I will check my cams, check my exhaust for collapse and they are both fine, then I will redo this. Thanks.
I will check my cams, check my exhaust for collapse and they are both fine, then I will redo this. Thanks.
#10
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You are losing power from 5000rpm up - the worst downpipe in the world won't cause that. You have something mechanically wrong with your setup - either a big boost leak, incorrect cam timing, or something of that sort. It has nothing to do with design of parts or anything like that.
#14
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In my current setup, the waste gate can fully open. But whether if it is flowing fast/smooth enough is another question.
#15
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well, you'd make MORE power if the wastegate wasn't opening
You sould look how my T3 wastegate opening merges with the DP and then complain.
This is what the openings look like:
and the merge within a VERY tight area out a signle dump tube:
You sould look how my T3 wastegate opening merges with the DP and then complain.
This is what the openings look like:
and the merge within a VERY tight area out a signle dump tube:
#16
yeah, if anything, that dp will either prevent the wastegate flapper from opening all the way, or just severely limit flow out of the flapper opening. in either case, you would be seeing boost creep (tons, in the case of it not opening all the way).
also, as has been pointed out, that wideband bung is approximately 12 parsecs too close to the turbine outlet... plug that up and relocate the wideband further downstream. a decent amount further.
also, as has been pointed out, that wideband bung is approximately 12 parsecs too close to the turbine outlet... plug that up and relocate the wideband further downstream. a decent amount further.
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