Subject	NA fuel pump above 14 PSI bad, read inside---->
Posted by	Hawk on July 07, 2006 at 7:46 AM
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In Reply To	I have used a NA fuel pump since my swap without problems. posted by SlicktopTT on July 07, 2006 at 07:06 AM
Message	Here's an excerpt from Ash's "Dyno Dissertation" "When I converted my non-turbo to turbo, I used the non-turbo fuel pump. It worked great at ~14psi. However, when I raised the boost to 16psi on the non-turbo pump, as the RPM increased to around 5500RPM, I began noticing the fuel pressure falling off all the way down to 45psi! This is VERY BAD! The reason this occurred is because the non-turbo fuel pump was unable to keep up with the demand of fuel at higher RPM. It maintained ~65psi until around 5000RPM and then sharply fell off at 5500RPM down to 45psi at the fuel rail. This is a catastrophic failure waiting to happen because when the fuel pressure falls, so does the fuel delivery. This is not a problem with the fuel pressure regulator; this was simply the non-turbo pump falling short of what was needed. I corrected this problem by putting a twin-turbo fuel pump into my car."
Follow Ups	REAL TT conversion questions - KARaudio 03:51:02 07/07/06 Dump the FMIC and plan on sidemounts - Broke_as_**** 04:22:30 07/07/06 Re: Dump the FMIC and plan on sidemounts - KARaudio 04:25:05 07/07/06 Search "FMIC", for this has been covered heavily (n/m) - Broke_as_**** 04:25:55 07/07/06 "Really good results on what?" (n/m) - YugoBernie (NoVA) 08:17:45 07/07/06 "Plus I like the look" - Kenny 08:32:05 07/07/06 Was just thinking that myself. (n/m) - RAGTPZ 11:05:52 07/07/06 2nd (n/m) - spyhunterTT(nj) 06:56:25 07/07/06 Re: Dump the FMIC and plan on sidemounts - 300zx swap 07:54:53 07/07/06 In your profile, set "include original message" to NO. - TT XTZ 09:37:47 07/07/06 I really wish that was the default.... (n/m) - Seafordguy 10:14:22 07/07/06 2nd. (n/m) - TT XTZ 10:25:03 07/07/06 I have used a NA fuel pump since my swap without problems. - SlicktopTT 07:06:35 07/07/06 Re: I have used a NA fuel pump since my swap without problem - Fuzznutz 07:29:46 07/07/06 Dude, get your car dyno'd... - Shift_(ATL) 07:34:32 07/07/06 NA fuel pump above 14 PSI bad, read inside----> - Hawk 07:46:30 07/07/06 get a fuel pressure gauge asap (n/m) - spyhunterTT(nj) 08:00:11 07/07/06 2nd (n/m) - 300zx90 (CO) 09:35:28 07/07/06 all this an an NA fuel pump? - mousersix (San Antonio) 08:00:49 07/07/06 Yup. At the time I did my swap (one of the first to do it) - SlicktopTT 09:09:40 07/07/06 I had issues with my na pump - spyhunterTT(nj) 09:36:09 07/07/06 seems like a pretty stupid thing to skimp out on - mousersix (San Antonio) 09:39:09 07/07/06 If there's no difference why are there two different - BigTDogg (MA) 12:15:45 07/07/06 Logic would dictate that a higher flowing pump would cost - SlicktopTT 13:07:28 07/07/06 Well done, we're just looking out for ya man :) (n/m) - BigTDogg (MA) 14:19:13 07/07/06 2nd (n/m) - mousersix (San Antonio) 16:19:16 07/07/06 boom (n/m) - myzislow 11:26:48 07/07/06 I appreciate intelligent comments like this and Fuzznutz - SlicktopTT 11:59:47 07/07/06 ok... - myzislow 12:32:32 07/07/06 I detonated with my NA pump. No detonation after switching - Guapo 12:52:21 07/07/06 Did you notice any improvement in performance? (n/m) - SlicktopTT 12:57:07 07/07/06 Yep. I no longer detonated, and was able to turn the boost - Guapo 13:00:41 07/07/06 Right, but did your car feel faster or have more power - SlicktopTT 13:14:32 07/07/06 Given the same boost, not really. Granted, I did not run - Guapo 13:17:50 07/07/06 why would it be faster? (n/m) - myzislow 13:28:08 07/07/06 If the fuel pressure was dropping and causing detonation or - SlicktopTT 13:40:58 07/07/06 detonation sensor pulls timing and turn ons safety boost - SpecNATT (Houston) 23:03:52 07/07/06 tick tick tick tick - SpecNATT (Houston) 22:52:24 07/07/06 The holes I see. >> - Arnel 10:20:55 07/07/06 Jus curious..can you post your hard proof? ^ (n/m) - zxtuner161 10:26:02 07/07/06 Stop (n/m) - sfpearl300zTT 10:50:57 07/07/06 Read. >> - Arnel 10:51:46 07/07/06 interesting... - zxtuner161 13:24:25 07/07/06 We auto tranny guys trap lower. >> - Arnel 19:28:01 07/07/06 I didn't know why your's were so low - zxtuner161 20:49:30 07/07/06 you also had a POS fmic (n/m) - myzislow 11:27:51 07/07/06 Please elaborate. >> - Arnel 11:58:52 07/07/06 Re: Please elaborate. >> - myzislow 12:26:24 07/07/06 Yes, I had the Greddy 2-row and >> - Arnel 12:40:26 07/07/06 well - zxtuner161 13:28:44 07/07/06 Repeat after me, not on the Z, Again.. not on the Z (n/m) - BigTDogg (MA) 14:20:49 07/07/06 just making the point that - zxtuner161 14:31:28 07/07/06 Design isn't the issue, T0M's FMIC is the best design - BigTDogg (MA) 14:52:11 07/07/06 Ditch the NYX shaft, that company blows, stock TT - BigTDogg (MA) 12:19:07 07/07/06 Re: REAL TT conversion questions - KARaudio 14:39:35 07/07/06 Re: Re: REAL TT conversion questions - spyhunterTT(nj) 15:19:26 07/07/06 There's still time to sell the FMIC!! On the 740s - BigTDogg (MA) 16:57:27 07/07/06 Re: There's still time to sell the FMIC!! On the 740s - KARaudio 21:35:45 07/07/06 Acceptable choice :) (n/m) - BigTDogg (MA) 16:27:20 07/08/06
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