Subject	I really think there is an issue with his fuel pump or some
Posted by	Ash's Z on November 22, 2004 at 11:17 AM
	This message has been viewed 85 times.
In Reply To	im not worried about the rwhp numbers...just the posted by genic on November 22, 2004 at 10:55 AM
Message	other part of the fuel system. Maybe the pump is just old and worn and isn't keeping up anymore. I had this happen to me with my Z and after replacing the pump all was well again. However, 600RWHP on a stock pump is quite a bit of fuel and I really think we are beginning to tax the pump at this kind of power level. Anyone making this kind of power continually should probably invest in a better fuel pump - even if only making it from time to time it would be good insurance to upgrade. [ 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	New best 1/4 mile time for me and a recent dyno tune - aZiator 07:27:59 11/22/04 at least you're in the 11's - snack_machine 07:39:18 11/22/04 ROFL at the last pic. >> - Arnel@Z32racing.com 08:09:07 11/22/04 Please don't cut the x-axis on dyno charts - Technomancer 08:17:03 11/22/04 Sorry, I dont have a scanner. Best I could do taking - aZiator 09:15:57 11/22/04 You could have them send you the dyno files - EricTTZ 10:18:19 11/22/04 When you talk about the plug porcelain, what do you mean - RSR 08:52:24 11/22/04 Look at the pic of the plug, whatever that part is around - aZiator 09:15:07 11/22/04 I looked at the picture, but can't tell much. - RSR 10:01:06 11/22/04 Ryan, look where I circled - boileralum 10:09:59 11/22/04 Thanks. It looks like....... - RSR 11:35:05 11/22/04 It is a good point. I had a chance to look at the pictures - Ash's Z 10:52:24 11/22/04 Actually----> - Kyle(Houston) 09:07:32 11/22/04 I forgot you even said that, I was actually talking about - aZiator 09:11:11 11/22/04 You did loose 60 Ft/lbs of torque & A/F is not as smooth.... (n/m) - Kyle(Houston) 09:21:59 11/22/04 Z1's dyno. I can swear it always read lower than the 248X - Ash's Z 09:32:17 11/22/04 Isn't Rwhp calculated from Torque X RPM/5252??----> - Kyle(Houston) 09:45:24 11/22/04 No, other way around. A dyno only determines horsepower - Ash's Z 10:38:54 11/22/04 That is the problem with Inertia dynos's----> - Kyle(Houston) 11:28:45 11/22/04 No kidding... - Dallas DamonZ 21:20:37 11/22/04 A brake dyno directly determines torque, and calculates - Ash's Z 11:09:26 11/22/04 3rd, A/F should have been worked on before going for a # - nixit 10:28:06 11/22/04 It happened the other way around though. We hit the number - Ash's Z 10:43:15 11/22/04 he ran out of fuel with 740's due to the fuel pump? - genic 10:49:26 11/22/04 A good fuel pump, probably so. But I think there are fuel - Ash's Z 10:54:05 11/22/04 im not worried about the rwhp numbers...just the - genic 10:55:58 11/22/04 I really think there is an issue with his fuel pump or some - Ash's Z 11:17:15 11/22/04 So what d oyou recomend? - EricTTZ 11:37:44 11/22/04 I'm researching that myself actually. I dont really have - Ash's Z 11:43:22 11/22/04 did you get your motor running yet? (n/m) - aliaZ 11:58:02 11/22/04 SPLParts seems to advocate overdriving the fuel pump - Technomancer 12:24:39 11/22/04 Overdriving an already weak pump won't help much though (n/m) - boileralum 12:35:26 11/22/04 Wasn't trying to apply this solution to that particular case - Technomancer 13:06:59 11/22/04 Dunno - I'm bored so I'm just trying to make conversation ;) (n/m) - boileralum 13:19:00 11/22/04 you jerks make my screen have a horizontal scrollbar now ;) (n/m) - joel(PA) 16:08:10 11/22/04 smaller fonts and higher resolution owns you :) (n/m) - Jjzx (next-gear.com) 17:34:07 11/22/04 Re: New best 1/4 mile time for me and a recent dyno tune - DrDCanaceu 09:27:45 11/22/04 LOL...Sigo esperando los 10s. :P - TheTwinZ (Peru) 12:29:28 11/22/04 Congrats on the time sir. (n/m) - Milo (Sport Z Magazine) 09:34:42 11/22/04 So which is funner, the Chinook or the Z? - Ash's Z 09:41:09 11/22/04 What plugs are you using? That looks like platinum - AzHeat 10:05:40 11/22/04 Curious: what is the relationship between the removal - RSR 10:08:56 11/22/04 shorter plug , the boss would not expose the spark as well - AzHeat 10:16:39 11/22/04 Copper Iridiums do work well w heat range of #7 >600rwhp - jawz 10:26:33 11/22/04 Copper Iridiums? :confused: (n/m) - boileralum 10:33:29 11/22/04 I think he mean copper or iridiums not both . (n/m) - AzHeat 10:34:30 11/22/04 removing the spark plug boss allows the use of shorter plugs (n/m) - aliaZ 10:51:58 11/22/04 in light of recent post/replies, i'd recommend that you - ni[X]it 13:42:10 11/22/04 Agreed 100%. I think I have determined his problem >>> - Ash's Z 17:01:19 11/22/04 Would my fuel pressure gauge show a drop in pressure if the - aZiator 17:30:55 11/22/04 Is this documented somewhere that the ecu disengages the - AzHeat 17:36:03 11/22/04
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