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BHP of a bolt-on and tuned car?

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Old 07-15-2007, 01:31 AM
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Default BHP of a bolt-on and tuned car?

I wasn't sure if I should put this here, or over in the dyno forum, but here i am... Anyway, I've found myself talking to a few people recently who aren't the biggest car people, so they don't know the difference between RWHP and BHP, and they've asked me what I have for HP now that I've done the stuff to my car that I have. I didn't really know what to say. I know they are looking for BHP number since that's what cars are advertised with. I would like to know what my car probably has realistically now after the stuff i've done. I myself have also been wondering how mine compares to the LS2 cars with 400hp. I have done all of the bolt-ons except the UD pulley and an electric water pump, and I just recently got a great tune by Green Light Motorsports, and it feels a lot better now than it did before. If you had to make an educated guess at what i can tell me I have for BHP now, what would you say I have? (also, I've never even been on a dyno, so I have no idea the RWHP numbers even... I should be in the 12.8 range next time to the track on a decent day though)

Thanks for the help
Old 07-15-2007, 12:01 PM
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Anybody have any ideas?
Old 07-15-2007, 04:37 PM
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guess not o_O. lol
Old 07-15-2007, 07:27 PM
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what did you put down on teh dyno?
Old 07-15-2007, 08:18 PM
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If it was a good tune, you are probably in the 360-370 at the wheel range. using the standard 15% translation, that puts you somewhere in between 410-420 crank (bhp). So not having any proof, if it were me, i'd just call it at 405-410 to be on the safe side.

Keep in mind this is highly speculative and based on averages. You could dyno your car and be way above or nowhere near these numbers.
Old 07-15-2007, 10:53 PM
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From what I've read on here mostly all bolt on cars don't go much above 350rwhp so I would say 360-370 would be a little high.
Old 07-16-2007, 12:02 AM
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Maybe I'll just say 405 so it sounds like a Z06 . haha.
Old 07-16-2007, 01:28 PM
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Originally Posted by 99RebelZ28
From what I've read on here mostly all bolt on cars don't go much above 350rwhp so I would say 360-370 would be a little high.
I've personally seen three in the 360-370 range with full bolt-ons. In fact I haven't seen any under 358 with same. I do recognize, of course, that this is just my experience, which consists of 5 cars total. So i'm not saying anyone else is wrong.
Old 07-16-2007, 03:30 PM
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i got a friend that had an 02 ta... he had full bolt on's and would beat HC cars on the track... it all depends on the car since they are all different
Old 07-16-2007, 04:21 PM
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I put down 342hp w/ cut out opened, no cats, stock exhaust manifolds. But that is w/ M6. With the A4 you should get a high stall converter, w/ good traction you will be deep in the 12's.
Old 07-16-2007, 08:06 PM
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I retract my statement. I didn't realize we were speaking of an A4 car. Yeah it's not going to be as high as I said.




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