Subject	Rob's effective compression should be right at 8.5:1
Posted by	Ash's Z on November 16, 2005 at 12:34 AM
	This message has been viewed 244 times.
In Reply To	what about Rob's pistons having slightly lower compression? posted by Shawn300zTT GT28R MD on November 16, 2005 at 12:23 AM
Message	he has stock cams, so it improves the effective comrpession over a car that has longer duration camshafts with the same pistons. [ ashspecz.com ] [ agpowers@bellsouth.net ] Enthusiasts soon understand each other. --W. Irving. Are you an enthusiast? If you are out to describe the truth, leave elegance to the tailor. Albert Einstein
Follow Ups	WOW -=Sport500 vs. Sport600w/extrude hone manifolds=- - Ash's Z 16:00:18 11/15/05 clearly sport 500's are teh heat :) (n/m) - Adam (NoVA) 16:07:31 11/15/05 Not sure what you mean there, but the Sport600's are - Ash's Z 16:09:42 11/15/05 Needs to learn to read ------------------------> (n/m) - Adam (NoVA) 16:12:02 11/15/05 Needs to learn to spell "teh"------------------> - Gold Z 16:27:16 11/15/05 actaully no - Adam (NoVA) 10:44:21 11/16/05 I said it over a year ago .. rant rant rant... - Slowninja(The Devil's Z) 20:52:07 11/15/05 All I have heard people saying is Sport 600 has too - Ricerdaddy 16:15:15 11/15/05 No complaints here - SilverTwin(OH) 18:14:23 11/15/05 I can attest to that... lag wasn't bad at all. (n/m) - PennStateZ 18:54:49 11/15/05 Agreed. They are a little laggy but doesn't bug me >> - Greg (Dallas) 19:35:42 11/15/05 C'mon Ash, your killing me with all this dyno stuff :-) - DAYTONAZ 16:24:40 11/15/05 LOL, its the buzzzzz. - Ash's Z 16:36:32 11/15/05 Looks like apples to oranges to me (n/m) - bankruptedz 16:49:43 11/15/05 i think that's the point (n/m) - PennStateZ 17:44:17 11/15/05 I was impressed with Joel's dyno and spool also. Any more - sfarrah 16:59:23 11/15/05 My sport 600 dyno from the turbo comparison in the FAQ - SilverTwin(OH) 18:20:38 11/15/05 Is that a pump fuel run? do you have the tq curve? - sfarrah 16:45:35 11/16/05 Is that Sp500 dyno representative of all sp500. I find - AzHeat 17:06:53 11/15/05 Stock manis are not that bad if ported properly - Gunter_Prien 17:14:13 11/15/05 Thanks Haken (n/m) - AzHeat 17:18:15 11/15/05 Sorry but this is bad information. Please do a search on - Milo (San Antonio) 18:34:42 11/15/05 Sport 600's dead below 2500 RPM (n/m) - Hawk 17:52:54 11/15/05 That's just where the pulls began... - Ash's Z 17:55:38 11/15/05 And.. what? Who races below 2500 rpms? (n/m) - Kenny 17:57:05 11/15/05 we going to fix my profile one of these days ;) - chris@boostpro.net 19:22:14 11/15/05 Do any of us really care about anything under 2500 RPM! (n/m) - Ricerdaddy 18:00:09 11/15/05 um yes (n/m) - CollegeBoy 19:30:47 11/15/05 then stick with stock turbo or sport 500. (n/m) - Ricerdaddy 22:33:06 11/15/05 Sell the Z and get a diesel (n/m) - BillZ2+2 23:33:34 11/15/05 already have one (n/m) - CollegeBoy 08:55:13 11/16/05 both sp500 charts are very similar to mine. Mine comes into - Ghozt 18:14:23 11/15/05 Here's my Sport600 dyno (also with extrude honed manis) >> - Greg (Dallas) 19:33:58 11/15/05 and i always thought those turbos were really laggy (n/m) - CollegeBoy 19:36:24 11/15/05 impressive spool for its size - Max865(ATL) 20:21:25 11/15/05 Not sure. Probably just differences in when they - Greg (Dallas) 21:05:59 11/15/05 Ash, U think the BC is dialed in properly?? (n/m) - racer2fst 19:36:35 11/15/05 Yes, it isn't your BC - your boost response is typical for - Ash's Z 20:00:23 11/15/05 Hey Rob! (n/m) - Joe(NoVA) 20:12:28 11/15/05 Hey Joe, how u been? How's the car? (n/m) - racer2fst 21:26:55 11/15/05 Thanks Ash I knew I was not going crazy when I looked at - Agner.S 19:36:48 11/15/05 Here is my sport 600 dyno prior to my gt28rs turbo upgrade - Slowninja(The Devil's Z) 19:56:38 11/15/05 How much boost on those runs? (n/m) - Greg (Dallas) 20:12:31 11/15/05 why did ur lag so much more than Ash's dyno's? - Rickytl (MA) 20:35:30 11/15/05 Dee's is more normal for a sport 600 car - Joe(NoVA) 22:22:25 11/15/05 Hey Ash, could you overlay joels and my dynocharts - Joe(NoVA) 20:07:42 11/15/05 Or maybe all three? rob's, joel's and mine :-) (n/m) - Joe(NoVA) 20:13:10 11/15/05 Here is Dee, Joel, Rob, and Joe's cars >>>>> - Ash's Z 20:29:59 11/15/05 Nice job, Ash. - SactoTodd 20:53:36 11/15/05 Wow, thats pretty crazy, turbos inside - Joe(NoVA) 21:09:57 11/15/05 I begin to like those sp600's with ported manifolds - Max865(ATL) 21:37:28 11/15/05 I'm still baffled how Joel's car out spools Dee's car? - sfarrah 17:00:49 11/16/05 If you look at these dyno charts.... - Zluster(Sir Sam) 20:30:45 11/15/05 You go! It would be nice to see you do this on Dee's - Ash's Z 20:36:32 11/15/05 Ok can do... - Zluster(Sir Sam) 20:49:21 11/15/05 hm... someone skilled in C++ could make a program. - PennStateZ 21:20:28 11/15/05 well the only problem is you still have to input the data - Max865(ATL) 21:50:33 11/15/05 Yes exactly. - Zluster(Sir Sam) 22:04:41 11/15/05 yeah, ask for some actual dyno data points, should have them - Max865(ATL) 22:17:29 11/15/05 Re: yeah, ask for some actual dyno data points, should have - Zluster(Sir Sam) 22:55:41 11/15/05 Re: Re: yeah, ask for some actual dyno data points, should h - Zluster(Sir Sam) 22:58:26 11/15/05 sum of all the power produced correct? (n/m) - Max865(ATL) 23:09:03 11/15/05 Re: sum of all the power produced correct? - Zluster(Sir Sam) 23:56:31 11/15/05 laggy supras or dyno queens should still have more - Max865(ATL) 23:08:03 11/15/05 it depends... - Zluster(Sir Sam) 23:43:52 11/15/05 Actually... - PennStateZ 12:33:35 11/16/05 Ti-89 to the rescue :-) (n/m) - Max865(ATL) 21:42:54 11/15/05 Nope, I use a Ti-82, its about 15 years old now. (n/m) - Zluster(Sir Sam) 22:06:00 11/15/05 did the same thing w/ a 6th order polynomial. all the - red TT (STL) 22:32:31 11/15/05 thats a little too rough of an estimate - Max865(ATL) 23:01:19 11/15/05 my sport 500 regression overlaid on the original - red TT (STL) 23:26:03 11/15/05 yup, we'll comapre results once i get some tabled dyno data (n/m) - Max865(ATL) 23:30:02 11/15/05 Ya we need some data tables.... - Zluster(Sir Sam) 23:46:11 11/15/05 tables would be awesome, especially in .25k rpm increments, - red TT (STL) 23:58:56 11/15/05 Re: tables would be awesome, especially in .25k rpm incremen - Zluster(Sir Sam) 00:05:08 11/16/05 i dunno. Ash, how much would you say a dyno typically varies - red TT (STL) 00:08:47 11/16/05 Typically, NONE, if you observe proper cool-down periods - Ash's Z 00:33:32 11/16/05 Wow, that is really close. (n/m) - Ash's Z 23:31:26 11/15/05 yup the greater the number of... - Zluster(Sir Sam) 23:50:36 11/15/05 That can be done, albeit, time consuming. - Ash's Z 23:57:06 11/15/05 ACTUALLY, just found the export utility. :) - Ash's Z 00:00:56 11/16/05 do you have a 250 rpm increment table? (n/m) - red TT (STL) 00:03:19 11/16/05 I did the one below in 50RPM increments. I can do any - Ash's Z 00:12:27 11/16/05 ohhhh sweetness.... - Zluster(Sir Sam) 00:04:16 11/16/05 Try this data: This is run #4 and run #11 1.4bar - Ash's Z 00:08:30 11/16/05 Someone else want to run them? - Zluster(Sir Sam) 00:16:23 11/16/05 run#4 = 1655.25, integrated from 2.25k to 7k rpms. - red TT (STL) 00:29:12 11/16/05 run#11 = 1414.73, integrated from 2.55k to 6.9k rpms - red TT (STL) 00:41:14 11/16/05 Do both of them from, say, 2700RPM to 6900RPM ? (n/m) - Ash's Z 00:45:10 11/16/05 run #4 =1561.63, run #11= 1404.89 from 2.7k to 6.9k - red TT (STL) 01:33:39 11/16/05 Mind telling me what program your using? - Zluster(Sir Sam) 01:37:26 11/16/05 i do the plotting & regressions on excel, integrate on my - red TT (STL) 02:22:56 11/16/05 Man, that's really awesome! - Ash's Z 01:42:38 11/16/05 Dont think so.... - Zluster(Sir Sam) 01:54:51 11/16/05 it doesn't, but it will generate the 6th order polynomial - red TT (STL) 02:26:54 11/16/05 The integrating part is easy.... - Zluster(Sir Sam) 02:38:43 11/16/05 Re: The integrating part is easy.... - red TT (STL) 03:48:55 11/16/05 Ah gotcha... - Zluster(Sir Sam) 11:02:40 11/16/05 also, here is an overlay of the previously listed 6th deg. - red TT (STL) 04:30:21 11/16/05 I would say thats good enough. - Zluster(Sir Sam) 11:06:53 11/16/05 that's damn close for a simple comparison... - PennStateZ 12:37:03 11/16/05 here are the numbers - Max865(ATL) 19:35:33 11/16/05 Well why dont we just arbitraily .... - Zluster(Sir Sam) 00:45:27 11/16/05 are the tables avaliable in excel format? - Max865(ATL) 09:39:50 11/16/05 Ok cool. - Zluster(Sir Sam) 00:02:15 11/16/05 what about Rob's pistons having slightly lower compression? - Shawn300zTT GT28R MD 00:23:19 11/16/05 Rob's effective compression should be right at 8.5:1 - Ash's Z 00:34:58 11/16/05 isn't stock 8.5:1? - Shawn300zTT GT28R MD 00:54:09 11/16/05 Not unless you specify otherwise when ordering the pistons, - Ash's Z 01:06:33 11/16/05 oh okay, gotcha. I do know that Dee's compression - Shawn300zTT GT28R MD 01:17:28 11/16/05 8.8:1 CR according to a good source --> LINK - Z-Jay (Edmonton, AB) 09:46:28 11/16/05 I meant, *static* compression. (n/m) - Ash's Z 01:07:55 11/16/05 my car has a built bottom end w/ 8k miles on it - Z32POWER.com 06:04:14 11/16/05 those are zemaestros manifolds, stock and heavily ported (n/m) - jawz 09:55:54 11/16/05 check your yahoo email please (n/m) - Z32POWER.com 14:13:30 11/16/05
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