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Forced Induction This section for the traditional Pontiac V8

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Old 04-09-16, 01:03PM   #1771
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So the bigger wheel means you have to mess with the down pipe. I remember how close it was with the current set up.
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Old 04-09-16, 01:43PM   #1772
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it works ive had this A/R on once already.. Just checked the oil filter and it was clean of all debris. Im real happy about that because I turned it up 500 rpm for the dyno....
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Old 04-09-16, 02:16PM   #1773
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I have the pressure gage hooked up to check the back pressure at 30 34 and 40. So hopefully I will have some high numbers to justify changing the A/R and the decrease of hp in the increase of the added 5 pounds of boost form 34 to 40 compared to 30 to 34. 57 hp vers 6 hp @ 40.
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Old 04-09-16, 02:45PM   #1774
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Who's dyno was that? Mustang magic?
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Old 04-09-16, 03:27PM   #1775
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Quote:
Originally Posted by JSPONT View Post
Who's dyno was that? Mustang magic?
Yes
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Old 04-09-16, 04:30PM   #1776
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Results r in. @ 30 back pressure is 38.Thats 1.26 ratio. 8+ more .Air temp went from 50-148=98 rise

35 psi BP was 46 11+ more. Ratio 1.31 Air temp 57-162 105 rise. 7 more then 30 psi run.

39.4 psi BP 56 18+ more . 1.43 ratio. Air temp 51-170= 119 rise.
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Old 04-09-16, 04:59PM   #1777
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What does everyone think? Think the 18+ BP pressure is taking the power gain away here ?
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Old 04-11-16, 12:35AM   #1778
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Bunch of old info was some cars had 2 to 1 ratios
Where are you getting the backpressure reading?
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Old 04-11-16, 10:36PM   #1779
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6" before the turbo flange
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Old 04-11-16, 10:38PM   #1780
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with the new .81 A/R 30 psi went from 38 bp to now 32. 34 psi was 44 now 40 . 40 psi was 57 bp now 50. I think it was a good change. Now I have to log some runs to see if the intake temp lowered.
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Old 04-11-16, 11:09PM   #1781
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Go back to the dyno. Let's see what the change did.
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Old 04-11-16, 11:10PM   #1782
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lol wish I had the money right now and I would..
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Old 04-11-16, 11:11PM   #1783
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https://www.youtube.com/watch?v=1_ffem_eQgs

heres some vids for you

https://www.youtube.com/watch?v=dgWucgbuQl0
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Old 04-12-16, 12:54AM   #1784
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I love how it that 4 cyl idle turns into a screaming nasty powerhouse!
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Old 04-12-16, 09:26AM   #1785
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I like the high pitch whistle it makes..
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