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Old 10-18-2012, 09:22 AM   #26
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Originally Posted by AngelSpeedFreak View Post
Would you be able to take a few pics of the access door? After changing out my tank twice, I would gladly cut the hole for easier access. Make a 5-6 hour project into 15 minutes sounds great....

Thanks.
Angel this is not for everyone, but I am so glad I did it to my car. With the tool it takes me 15 min to replace the pump.

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Old 10-18-2012, 09:34 AM   #27
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hmmm with some spray foam after your done around the seam or sound deadner like most of us have done in our vehivles This is very conceivable
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Old 10-18-2012, 09:54 AM   #28
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hmmm with some spray foam after your done around the seam or sound deadner like most of us have done in our vehivles This is very conceivable
I seal it with black latex caulk, once the seat is on you don't see or hear anything.
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Old 10-18-2012, 10:11 AM   #29
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Quote:
Originally Posted by Jayrcr3 View Post
You add the ZR1 MAP sensor and it tells the ECM when you are in boost which increases the PW to the pump. I have the BAP also.
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I am at 665 rwhp with the ZL-1 fuel pump and the BAP off. Fuel pressure is perfect. I am also glad I installed an access door under the rear seat. If I ever have a problem or want to up grade my fuel pump it will only take 15 minutes.


OMG, I'm sooooooo doing it that way.

Assuming there is not structural weakening.
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Old 10-18-2012, 12:23 PM   #30
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Sorry to confuse you. I have a BAP installed, but to be honest it may be turned off. Mike Norris did the install, and the BAP came with the whipple kit. I know it's in there but I don't know if it's doing anything. He also installed a ZL1 pump at my request. If you would like, shoot me a PM or give him a call. He told me that I have no fuel delivery issues with the setup, which was my concern. He said with my mods I already had, the stock pump would be questionable. It's also my understanding that when you I nstall the zl1 pump and a ZR1 map sensor it increases the pulse width on the pump under boost to increase the volume and pressure. Our cars do this already, but the stock MAP sensor doesn't have the range to allow for boost.

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Old 10-18-2012, 12:52 PM   #31
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Quote:
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Sorry to confuse you. I have a BAP installed, but to be honest it may be turned off. Mike Norris did the install, and the BAP came with the whipple kit. I know it's in there but I don't know if it's doing anything. He also installed a ZL1 pump at my request. If you would like, shoot me a PM or give him a call. He told me that I have no fuel delivery issues with the setup, which was my concern. He said with my mods I already had, the stock pump would be questionable. It's also my understanding that when you I nstall the zl1 pump and a ZR1 map sensor it increases the pulse width on the pump under boost to increase the volume and pressure. Our cars do this already, but the stock MAP sensor doesn't have the range to allow for boost.

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I do have a ZR1 MAP sensor but need to get a ZL1 fuel pump.

So have we figured out wether the ZL1 pump needs to be tuned for?
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Old 10-18-2012, 01:41 PM   #32
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If I read everyones comments correctly, sounds like adding the ZL1 pump can be done as a plug and go with no retune required. If you replace the stock MAP (which the maggie install re-uses) with a ZR1 MAP you would have to retune to take advantage of the new 3bar MAP sensor.

Correct?

By the way, thanks for all of the input. Pieces of this discussion has appeared in other areas but I appreciate the info you guys are providing, especially how well the changes appear to be working.
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Old 10-18-2012, 02:27 PM   #33
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If I read everyones comments correctly, sounds like adding the ZL1 pump can be done as a plug and go with no retune required. If you replace the stock MAP (which the maggie install re-uses) with a ZR1 MAP you would have to retune to take advantage of the new 3bar MAP sensor.

Correct?

By the way, thanks for all of the input. Pieces of this discussion has appeared in other areas but I appreciate the info you guys are providing, especially how well the changes appear to be working.
You are correct.
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Old 10-18-2012, 02:37 PM   #34
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They do have to adjust the MAP scale in the tune for the ZR1 MAP sensor.

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Old 10-18-2012, 03:02 PM   #35
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Quote:
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They do have to adjust the MAP scale in the tune for the ZR1 MAP sensor.

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Ok. But if mine has already been tuned with the ZR1 MAP sensor I can now just plug and play with a ZL1 pump correct?
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Old 10-18-2012, 05:30 PM   #36
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Ok. But if mine has already been tuned with the ZR1 MAP sensor I can now just plug and play with a ZL1 pump correct?
Yep!
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Old 10-19-2012, 09:55 AM   #37
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What did you use to cut the tank access with?
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Old 10-20-2012, 01:59 PM   #38
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ok I am lost....since I am not a learned as you gys. So let me : " you are saying with a zl1 map sensor and pump....u can run how much boost in that motor max, ...and with what injectors. Please clarify this for me. again I am not really to keen on it it.
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Old 10-20-2012, 02:23 PM   #39
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ok I am lost....since I am not a learned as you gys. So let me : " you are saying with a zl1 map sensor and pump....u can run how much boost in that motor max, ...and with what injectors. Please clarify this for me. again I am not really to keen on it it.
Well I am running a ZR1 (LS9) MAP sensor.

It's a 3 Bar sensor. Meaning it can be tuned for higher boost.

If I'm not mistaken a 'Bar' is 1 atmosphere at sea level. (14psi-ish) So a 3 Bar sensor can be tuned for boost levels two times the barrometric pressure. or up to 28 psi??? (The atmospheric bar or 'Barrometric Pressure' being one bar and the two bars of boost)

I bet I got that totally wrong. LOL
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Old 10-20-2012, 07:00 PM   #40
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Thanks so much for the pics Manny.... If I have to do anything else with the pump I am going to cut that hole. It looks so much easier and no one will ever see under the seat or even know its there but you.

Very very nice
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Old 10-20-2012, 07:45 PM   #41
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Thanks so much for the pics Manny.... If I have to do anything else with the pump I am going to cut that hole. It looks so much easier and no one will ever see under the seat or even know its there but you.

Very very nice
Angel your welcome, if you ever decide Pm me and I will give you messurements and some more Pic's.
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Old 10-20-2012, 08:11 PM   #42
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I dont understand why they wouldnt make an access to the fuel pump from the factory. I never thought about putting in an access, this might have to happen when I change my pump.
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Old 10-20-2012, 08:15 PM   #43
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Angel your welcome, if you ever decide Pm me and I will give you messurements and some more Pic's.
I have a ZL1 pump on the way. If you take those measurements I'd vey much be interested. I'll be cutting mine soon.
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Old 10-20-2012, 08:19 PM   #44
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Yes please
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Old 10-20-2012, 08:22 PM   #45
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Nice move cutting the access door, I dropped my tank to install the ZL1 fuel Pump. It's plug & play and doesn't need to be retuned just fir that addition.

The ZL1 Pump is supposed to be able to handle up to 650RWHP, if not more and so far it's doing it's job. I'm running a ZR1 3 Bar Map, ZL1 Pump, OD Cog Drive, 3.6 pulley, ALKY Meth, Kooks LTs with no cats & SLP Loudmouth II exhaust. So I think the ZL1 pump will fit your needs
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Old 10-20-2012, 08:28 PM   #46
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The hole has to be 7.5" X 7.5" to get the tool in. Take a look at the taped picture you can see the lines where I messured from.
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Old 10-20-2012, 09:07 PM   #47
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The hole has to be 7.5" X 7.5" to get the tool in. Take a look at the taped picture you can see the lines where I messured from.
Good enough. The 7.5"x7.5" is what I needed.

Thank you.

What did you cut it with?
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Old 10-20-2012, 09:45 PM   #48
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The Eforce uses the 3 bar map, correct? I'm also going to be running a 3.5" pulley with the eforce 60# injectors...

I already have the ZL1 pump in. Hope it's enough...
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Old 10-20-2012, 10:55 PM   #49
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Do you actually have to drop the tank. Someone said that there is an access panel under the back seat that allows you to access from above without dropping the tank.

Currently I am at 505 WHP and the 52 lb injectors that came with the Maggie. I just ant to get my AFR to the high 11 maabe 12 at WOT.


The engineers at Chevy were not smart enough to do that...
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Old 10-21-2012, 08:12 AM   #50
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The engineers at Chevy were not smart enough to do that...
They are smart... That way you have to go to the dealer and pay for all that labor.
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