03-31-2009, 02:04 PM | #15 |
Enlightened
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Good luck man. I'll be following this project quite closely. Just don't get your hopes too high.
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03-31-2009, 02:49 PM | #16 | |
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Read the works cited. Everything is documented there. Along with dyno charts. - Xanthos
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03-31-2009, 03:13 PM | #17 |
Drives: Audi A4 STG3, Porsche 914 v8 Join Date: Oct 2008
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Dyno charts show everything piece by piece. Putting them all together doesnt yeild you with the same results.
Doing mod A plus mod B doesnt equal A+B in terms of power. A+B=C... The weak link on the full exhaust dyno was that it needed to be opened up a little. Opening up the exaust more and more will not give you a continuous positive result. Your going to find that once you find the couple of week links in the engine your going to run into a hurdle to get over certain power goals. How long have you been building cars? How many cars have you had a hand in modifying and dynoing? Im just saying not to be discouraged once you get to the dyno and realize that when your looking for 360whp that you only hit 330whp. PS: you shouldnt say fwhp (which means front wheel horse power) you should say whp or rwhp (rear whp) BTW how old are you? |
03-31-2009, 04:29 PM | #18 |
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Very doable. GM has said that the 3.6 is good for 370 factory hp. Who knows what that involves but I am sure its nothing too drastic from the current set-up.
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04-01-2009, 12:16 AM | #19 | |
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- Xanthos
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04-01-2009, 12:32 AM | #20 |
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CHP is typically what is used for crank horsepower. FWHP can be determined as front wheel or flywheel and can be very misleading when talking on a forum.
Oh and super were not talking about a mere 65hp increase. Were talking about a whole 120hp increase. Without an increase in compression, displacement or other internal modifications, or radical change in timing I dont believe that getting above 370~ crank HP is going to be doable by the general public. (This excludes forced induction). |
04-01-2009, 01:05 AM | #21 | |
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Why did you ask my age, anyway? - Xanthos
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04-01-2009, 11:41 AM | #22 |
Drives: Audi A4 STG3, Porsche 914 v8 Join Date: Oct 2008
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I was curious. I've seen a lot of teens and young boys talk about doing mods and say "this was proven for this much this was proven for this much, add it all together and I should be at X hp. When they finally get to proving it, its about 1/2 the increase they had calculated.
I see it all the time... |
04-01-2009, 11:55 AM | #23 |
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i doubt you'll get much at all from replacing the cats. On my supercharged cobra, the typical gain is 5-7 rwhp or so going from the stock 4 cat pipe to an off road x pipe. And 20 rwhp is very optimistic for the long tubes... Maybe on an LT1 with what looked like crush bent exhaust manifolds. It's probably closer to 10-12 rwhp.
Last edited by THE EVIL TW1N; 04-01-2009 at 03:03 PM. |
04-01-2009, 11:08 PM | #24 | |
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04-02-2009, 02:36 PM | #25 |
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04-02-2009, 05:08 PM | #26 | ||||
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Quote:
doesnt always add up the same, sometimes its more power in the end as some parts complement each other more than others. I know too many people who go out and buy a generic cam, then go buy a set of p&p heads and arent putting out the numbers that they "should" because that particular combo doesnt work well together. but others who do their research before jumping in on the aftermarket bandwagon, will go at the overall setup to match components to complement each other. as for fwhp... it only means front wheel horse power when you are talking about a front wheel drive car. Quote:
this is how hotrodding got started. a regular guy and a wrench. not a multimillion dollar corportation. Xanathos' plan has hot rod written all over it. granted he's not fabricating the whole thing from the ground up, but he's building HIS setup. however, you are right about the hp #'s that get thrown out there. I pointed that out with a few other members when we were discussing 4th gen exhausts. another member posted up IIRC SLP loudmouth exhaust and it had a higher power number than the other exhausts... but they also had an intake kit on the car they tested. which nullified the results of any gains. thats why you run the purge line into a hidden port lol
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04-02-2009, 06:00 PM | #27 | |
Drives: Audi A4 STG3, Porsche 914 v8 Join Date: Oct 2008
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I understand that modifications often compliment each other.
Also were not talking valvetrain matching and head porting here, were talking about a freeflowing exhaust and an intake. Many times when doing these bolt ons there will be an initial big increase in HP due to the large increase in flow on either the exhaust or intake, however continuing to increase the flow gives exponentially less HP increase until finally it becomes a determent to the system. However that will never happen when he's still running the stock tubing. Also please realize im not telling him that he shouldnt do any modifications, I simply gave him my input on his numbers and told him he should increase his timing somehow to account for water injection. I fully support him doing these mods, but he shouldnt be frustrated if he only nets half his goal HP from simple bolt ons (I do think he will hit about 3/4 of his HP goal though). Im 22, however I've been building v8's and dyno tuning turbocharged cars since I was 14. My first car was my 914, which 2 years later I threw in a 350sbc. Quote:
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04-02-2009, 06:37 PM | #28 | |||
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I really want him to hit his mark before going mechanical FI. tho if he does run a few hp shy... a 50 shot of nitrous would surely put him to where he wants to be....
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