Guest V8Z Posted August 14, 2006 Share Posted August 14, 2006 I am in the middle of installing a 1987 TPI fuel injection intake on my 1972 240z with a 350 smallblock 5 speed. I need a high pressure fuel pump to get me 38-47 psi to operate the TPI. I really don't want a external fuel pump due to the noise they make, so I was looking around and found out that a 280z fuel pressure is 36-38 psi. Would that be close enough???? If not, will a turbo model z make more fuel pressure? Or is there a in-tank fuel pump out there that would work easily and cheap? It just seems like if the 280z tank is a intank pump that it would be perfect for my needs since it would already have the return line there and it would hopfully fit. Let me know what you guys think. Thanks,Paul Quote Link to comment Share on other sites More sharing options...
RB26powered74zcar Posted August 14, 2006 Share Posted August 14, 2006 None of the 1st gen Z cars (70-78) came with intank fuel pumps. I've seen guys use modern plastic fuel tanks from the donor cars they got their LSx motor from. As to which one, I can't say for sure.... Quote Link to comment Share on other sites More sharing options...
Administrators RTz Posted August 14, 2006 Administrators Share Posted August 14, 2006 I am in the middle of installing a 1987 TPI fuel injection intake on my 1972 240z with a 350 smallblock 5 speed. I need a high pressure fuel pump to get me 38-47 psi to operate the TPI. I really don't want a external fuel pump due to the noise they make, so I was looking around and found out that a 280z fuel pressure is 36-38 psi. Would that be close enough???? If not, will a turbo model z make more fuel pressure? Or is there a in-tank fuel pump out there that would work easily and cheap? It just seems like if the 280z tank is a intank pump that it would be perfect for my needs since it would already have the return line there and it would hopfully fit. Let me know what you guys think. Thanks,Paul First, The 280Z's fuel pump is external. Second, I would assume you'll be using the TPI Fuel press. regulator (mounted to the pass. side rail, aft) so no worries on proper fuel pressure. Third, I once installed a '75 tank in a 240 ('77-'78 are larger) and it 'sorta' fit. The thing that I remember most is that the strap 'embossments' are in a slightly different location, so the strap brackets required some tinkering. Looks a litte funny as well. HTH, Quote Link to comment Share on other sites More sharing options...
Guest V8Z Posted August 14, 2006 Share Posted August 14, 2006 Well thats no good..... I can't hear the fuel pump running on my 280z so what if I took a 280z fuel pump and mounted in line, would it make enough pressure to run the TPI system? I know my buddy has a 280z pump somewhere at his shop. If the 280z pump was ran without a regulator what would it be? 50psi, 75psi, 100psi.... as long as it was 50psi and up that would be fine cause the TPI system has a fuel pressure regulator on the fuel rail. But I would still have the problem of the return line going into the tank. Quote Link to comment Share on other sites More sharing options...
Administrators RTz Posted August 14, 2006 Administrators Share Posted August 14, 2006 Well thats no good..... I can't hear the fuel pump running on my 280z so what if I took a 280z fuel pump and mounted in line, would it make enough pressure to run the TPI system? Yes, TPI is typically 40-42psi, 280Z typically 38-40. No worries. I know my buddy has a 280z pump somewhere at his shop. If the 280z pump was ran without a regulator what would it be? 50psi' date=' 75psi, 100psi.... as long as it was 50psi and up that would be fine cause the TPI system has a fuel pressure regulator on the fuel rail.[/quote'] Be careful with this line of thinking. The more pressure you ask from a pump, the less VOLUME you will get. At 40psi, the stock Z pump should flow enough to run a stock TPI motor. But I would still have the problem of the return line going into the tank. There are plenty of vent lines in the 240 tank to get fuel back in but, you have a bigger problem than that... if you do not run a baffled tank or some sort of swirl pot, you'll uncover the pump pick-up under accel/deccel/cornering, causing very unpleasant surges. Quote Link to comment Share on other sites More sharing options...
strotter Posted August 15, 2006 Share Posted August 15, 2006 BTW, the external pumps aren't noisy if you use rubber-isolation mounts. Mine was driving me crazy, then I found rubber isolators (I think from some Harley supply shop, but they're available lots of places). Now I can hear it if I *listen* carefully when I first turn the ignition on, but there's no way I can hear it when the car's running (and I have "neighbor-friendly" mufflers on). Quote Link to comment Share on other sites More sharing options...
Guest V8Z Posted August 15, 2006 Share Posted August 15, 2006 Well, I don't have "neighbor-friendly" mufflers and if you can't hear the fuel pump with your mufflers I know I won't. I guess I will go with a aftermarket external fuel pump like from holley, unless I can find a OEM external fuel pump in the local salvage yards that will make the pressures I need. BTW, I went and bought all new sensors for my speed density TPI today......170.00. WOW! And I still need the wiring harness and the ECM. This is getting expensive! I think me selling the intake, carb., and breather off my car now should cover the price of the harness and the ECM. Quote Link to comment Share on other sites More sharing options...
strotter Posted August 16, 2006 Share Posted August 16, 2006 When you're looking for ECUs, you'll have your choice of a number of different units. My personal favorite, and one that is well understood and well documented is the 1227730. It can run a variety of "masks", or control programs, including the excellent $8d - probably the best-documented ECU mask there is. Mostly used on Camaro/Firebirds and Corvettes, it was also used in a number of other cars including: 1987 2.0 L4 TBI “1†LL8 1988 2.0 L4 TBI “1†LL8 (early) 1987-89 2.8 V6 PFI “W†LB6 (exc. “W†body) 1988-94 3.1 V6 PFI “T†LH0 (exc. “W†body) 1990-92 5.0 V8 TPI “F†LB9 1990-92 5.7 V8 TPI “8†L98 (“F†body) (from http://www.cruzers.com/~ludis/p4xref.html ) AUJP1350 90-92 V8 TPI, 1227730 AUJMV 89 5.7L TPI Camaro automatic BAFL 93 LT1 TPI Camaro automatic AZTY 92 3.1L MPFI Camaro "T" AMAS7004 2.8L Auto ASMJ0692 88 Beretta/2.8L/Speed Density ADRY2642 87 Cimarron/2.8L/DigDash/Non-SD ADRY3193 87 Cimarron/2.8L/DigDash/Non-SD ARDC4468 88 Cimarron/2.8L/DigDash/Speed Density ADRR3163 87 Corsica/Beretta 2.8, 3spd auto, Federal emissions, 3.18:1 final drive, without Z21 The easiest to find is the Corsica/Beretta - I gave $25.00 last time I picked one up at Pick 'n Pull. For your V8 application, you'll also need to get the Memcal for your particular motor, or something close. GM Parts Direct has them for about $45.00 (last time I checked). You can find harness diagrams all over the place, a good one being http://chevythunder.com/ Good luck and have fun. Quote Link to comment Share on other sites More sharing options...
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