# What a good port and polish can do **URL:** \ **Category:** NYSpeed Automotive\ **Created:** [May 16, 2007, 2:04pm UTC](https://forums.speedlife.net/t/what-a-good-port-and-polish-can-do/29398 "2007-05-16T14:04:02Z")\ **Posts on this page:** 13\ **Page:** 1
**Author:** ![dezod](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/dezod/32/7467_2.png) [@dezod](https://forums.speedlife.net/u/dezod)\ **Post date:** [May 16, 2007, 2:04pm UTC](https://forums.speedlife.net/t/what-a-good-port-and-polish-can-do/29398/1 "2007-05-16T14:04:02Z")
We have been tinkering with the Honda D17 for years and just decided to do a Port and Polish on a head. Well we where floored at the results and I figured we would share. **Baseline:** 164whp and 142ft/lbs on 5 PSI with an auto tranny; tuned 11.5:1 **Addition:** PnP Head, 577CC injectors (from 310cc), Walbro 255 in tank (from stock), retuned 11.5:1 **New numbers:** 208whp and 211ft/lbs on 5 PSI with an auto tranny; tuned 11.5:1 **Gain:** 44whp and 69ft/lbs! :headbang::headbang: ---
**Author:** ![Locutus](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/locutus/32/7574_2.png) [@Locutus](https://forums.speedlife.net/u/Locutus)\ **Post date:** [May 16, 2007, 2:06pm UTC](https://forums.speedlife.net/t/what-a-good-port-and-polish-can-do/29398/2 "2007-05-16T14:06:27Z")
thats awesome :tup: ---
**Author:** ![oneslowdsm](https://avatars.discourse-cdn.com/v4/letter/o/8491ac/32.png) [@oneslowdsm](https://forums.speedlife.net/u/oneslowdsm)\ **Post date:** [May 16, 2007, 2:09pm UTC](https://forums.speedlife.net/t/what-a-good-port-and-polish-can-do/29398/3 "2007-05-16T14:09:43Z")
nice work ---
**Author:** ![93dx\_hatch](https://avatars.discourse-cdn.com/v4/letter/9/90ced4/32.png) [@93dx\_hatch](https://forums.speedlife.net/u/93dx_hatch)\ **Post date:** [May 16, 2007, 2:13pm UTC](https://forums.speedlife.net/t/what-a-good-port-and-polish-can-do/29398/4 "2007-05-16T14:13:39Z")
good numbers but there were to many other variables changed to say that the port and polish gave you a 44whp and 69ft/lbs, gain. How long ago was the baseline number? Regardless, nice gain and good numbers ---
**Author:** ![Slopoke](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/slopoke/32/7248_2.png) [@Slopoke](https://forums.speedlife.net/u/Slopoke)\ **Post date:** [May 16, 2007, 2:14pm UTC](https://forums.speedlife.net/t/what-a-good-port-and-polish-can-do/29398/5 "2007-05-16T14:14:44Z")
wow nice job!:tup: ---
**Author:** ![dezod](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/dezod/32/7467_2.png) [@dezod](https://forums.speedlife.net/u/dezod)\ **Post date:** [May 16, 2007, 2:16pm UTC](https://forums.speedlife.net/t/what-a-good-port-and-polish-can-do/29398/6 "2007-05-16T14:16:11Z")
[quote=“93dx–hatch,post:4,topic:29398"”] good numbers but there were to many other variables changed to say that the port and polish gave you a 44whp and 69ft/lbs, gain. How long ago was the baseline number? Regardless, nice gain and good numbers [/quote] No other changes. Same boost, same 93 Chevron octane, same log manifold, same E50 turbo, same dyno. Baseline was 2 weeks ago. 😃 The fuel injectors (310cc) where running 85% duty on the car with the previous power. When we put on the head, it was making the same PEAK power at 3 PSI of boost and at 4K RPMS instead of 7500 RPMS, and we could not add anymore fuel. So we swapped the injectors and the pump for good measure, otherwise bye bye motor because it was ran stupid lean. There was about 10 hours of flow bench testing into this head. The CFM gains are there, hence the power 73.5 CFM total over stock ---
**Author:** ![psphinx81](https://avatars.discourse-cdn.com/v4/letter/p/e9a140/32.png) [@psphinx81](https://forums.speedlife.net/u/psphinx81)\ **Post date:** [May 16, 2007, 2:16pm UTC](https://forums.speedlife.net/t/what-a-good-port-and-polish-can-do/29398/7 "2007-05-16T14:16:46Z")
:tup: ---
**Author:** ![mycarsux](https://avatars.discourse-cdn.com/v4/letter/m/898d66/32.png) [@mycarsux](https://forums.speedlife.net/u/mycarsux)\ **Post date:** [May 16, 2007, 2:24pm UTC](https://forums.speedlife.net/t/what-a-good-port-and-polish-can-do/29398/8 "2007-05-16T14:24:06Z")
sweetness, too bad its an auto tranny. ---
**Author:** ![Adictd2b00st](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/adictd2b00st/32/7625_2.png) [@Adictd2b00st](https://forums.speedlife.net/u/Adictd2b00st)\ **Post date:** [May 16, 2007, 2:43pm UTC](https://forums.speedlife.net/t/what-a-good-port-and-polish-can-do/29398/9 "2007-05-16T14:43:20Z")
impressive :tup: ---
**Author:** ![Bacon](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/bacon/32/7230_2.png) [@Bacon](https://forums.speedlife.net/u/Bacon)\ **Post date:** [May 16, 2007, 10:22pm UTC](https://forums.speedlife.net/t/what-a-good-port-and-polish-can-do/29398/10 "2007-05-16T22:22:02Z")
[quote=“mycarsux,post:8,topic:29398"”] sweetness, too bad its an auto tranny. [/quote] Nothing wrong with an auto, depending on the purpose. 😉 ---
**Author:** ![Carnut](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/carnut/32/7590_2.png) [@Carnut](https://forums.speedlife.net/u/Carnut)\ **Post date:** [May 17, 2007, 6:07am UTC](https://forums.speedlife.net/t/what-a-good-port-and-polish-can-do/29398/11 "2007-05-17T06:07:03Z")
Not to put it down but like Dan said there are way too many variables changed to honestly attribute the power gain to the head work. Good job on power gain none the less. Crank the brooost ---
**Author:** ![Zer0DazE](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/zer0daze/32/7624_2.png) [@Zer0DazE](https://forums.speedlife.net/u/Zer0DazE)\ **Post date:** [May 17, 2007, 6:58am UTC](https://forums.speedlife.net/t/what-a-good-port-and-polish-can-do/29398/12 "2007-05-17T06:58:29Z")
i dont know man, those D17 heads looked like poop. its kinda believable, especially on a boosted engine. ---
**Author:** ![dezod](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/dezod/32/7467_2.png) [@dezod](https://forums.speedlife.net/u/dezod)\ **Post date:** [May 18, 2007, 8:30am UTC](https://forums.speedlife.net/t/what-a-good-port-and-polish-can-do/29398/13 "2007-05-18T08:30:40Z")
Finally somone speaking from experience of looking at one. :bloated: [quote=“Zer0DazE,post:12,topic:29398"”] i dont know man, those D17 heads looked like poop. its kinda believable, especially on a boosted engine. [/quote]