Hp versus torque question
#1
Hp versus torque question
I got my car on the dyno last week. I was surprised at the end when i was showing more torque then hp. Max torque was 287 and max hp was 245. Why is this? I was expecting the torque to be lower but maybe i am off. Plus is it normal for an s5 turbo to not be able to hold 14PSi up to 5500 rpms? Boost was dropping down to like 10psi with a MBC. Thanks...
#2
Originally Posted by Smoken'
I got my car on the dyno last week. I was surprised at the end when i was showing more torque then hp. Max torque was 287 and max hp was 245. Why is this? I was expecting the torque to be lower but maybe i am off. Plus is it normal for an s5 turbo to not be able to hold 14PSi up to 5500 rpms? Boost was dropping down to like 10psi with a MBC. Thanks...
The boost drop is normal, especially on s5 turbo's.
#3
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depends on how high you revved during the dyno run hp won't pass torque until you pass 5,252 rpms. however, if the torque peak is significantly higher than the torque at 5,252, then it'll be very difficult to get the peak HP numbers near the peak Torque numbers. and with boost falling off like you described, it makes a whole lot of sense.
Last edited by fstrnyou; 07-25-04 at 09:50 PM.
#6
Originally Posted by RETed
Exhaust system too small.
-Ted
-Ted
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#11
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Originally Posted by Smoken'
Ted, i have the Racing beat turbo back exhaust, at least i think i do. Somebody was telling me that the catback portion of the exhaust system looked a little bit small, so maybe your right. IS the tubing on the catback supposed to be 3"as well?
Are you running the stock turbo?
-Ted
#12
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Originally Posted by OverDriven
Maybe you accidently left a V8 under your hood?
-Joe
-Joe
#13
Originally Posted by RETed
Can you verify this or are you just telling us what the previous owner told you?
Are you running the stock turbo?
-Ted
Are you running the stock turbo?
-Ted
I bought the exhaust used. A buddy of mine that also has the racing beat turbo back exhaust, saw my exhaust b4 i put it on the car. He said that the cat back portion of the system looked a little smaller then what he had put on his car.
The turbo is an S5 one off of a j-spec motor with aproximetly 53k miles on it. I ported the wastegate b4 i put it on there.
Is it possible that there is something wrong with my MBC?
My intake mods are K&N cone filter, 3" TID, TB modification with secondary throttle plates removed, match ported upper intake.
Steve
#15
[QUOTE=VietFC]if it really is the racing beat turbo back exhaust... i don't believe there's any other cat back system in the world that would bolt onto it.[/QUOTE
I dont see why any other catback wouldn't bolt right up. Its just a header, presilencer and catback...
Steve
I dont see why any other catback wouldn't bolt right up. Its just a header, presilencer and catback...
Steve
#16
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Originally Posted by Smoken'
I dont see why any other catback wouldn't bolt right up. Its just a header, presilencer and catback...
It just plain would not fit.
-Ted
#18
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Originally Posted by Smoken'
Would a regular racing beat catback bolt up to the header and presilencer from a turbo back system?
RB just recently redid this particular exhaust, so this could've changed.
-Ted
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