Fuel Pump Upgrade! Dual Walbro 400s
#22
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Thunder550 had a thread on this years ago. I cant remember what the conclusion was, but IIRC his was due to low-impedance injectors. I think he lower FP 1bar, and raised IDC 10%.
I think I went to small on my injectors as well.
I think I went to small on my injectors as well.
#26
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I redid my fuel bucket using an 07 bucket and some 3/8 pipe fittings from mcmastercarr. I think the way I had it before might have been leaking and bleeding off pressure, and this way is cleaner anyway.
![Name: IMG_3451Custom.jpg
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![Name: IMG_3455Custom.jpg
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![Name: IMG_3458Custom.jpg
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I also thought this was really interesting...here are the 3 different style fuel buckets from 99 to the current gmt900 body style:
![Name: IMG_3452-CopyCustom.jpg
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Size: 136.7 KB](https://www.performancetrucks.net/forums/attachments/fuel-systems-210/124947d1501306026-fuel-pump-upgrade-dual-walbro-400s-img_3452-copycustom.jpg)
There are a lot of differences between all the years. If you look back at my bucket, youll notice Im using the 07 top, with the 03 lower bucket, and a 99 level sensor![Icon Lol](https://www.performancetrucks.net/forums/images/smilies2/icon_lol.gif)
The bucket of the 03-06 is much taller than the 07, which is why I wanted to use it.
![Name: IMG_3451Custom.jpg
Views: 2119
Size: 107.3 KB](https://www.performancetrucks.net/forums/attachments/fuel-systems-210/124944d1501306026-fuel-pump-upgrade-dual-walbro-400s-img_3451custom.jpg)
![Name: IMG_3455Custom.jpg
Views: 2323
Size: 91.0 KB](https://www.performancetrucks.net/forums/attachments/fuel-systems-210/124945d1501306026-fuel-pump-upgrade-dual-walbro-400s-img_3455custom.jpg)
![Name: IMG_3458Custom.jpg
Views: 2380
Size: 140.7 KB](https://www.performancetrucks.net/forums/attachments/fuel-systems-210/124946d1501306026-fuel-pump-upgrade-dual-walbro-400s-img_3458custom.jpg)
I also thought this was really interesting...here are the 3 different style fuel buckets from 99 to the current gmt900 body style:
![Name: IMG_3452-CopyCustom.jpg
Views: 2834
Size: 136.7 KB](https://www.performancetrucks.net/forums/attachments/fuel-systems-210/124947d1501306026-fuel-pump-upgrade-dual-walbro-400s-img_3452-copycustom.jpg)
There are a lot of differences between all the years. If you look back at my bucket, youll notice Im using the 07 top, with the 03 lower bucket, and a 99 level sensor
![Icon Lol](https://www.performancetrucks.net/forums/images/smilies2/icon_lol.gif)
The bucket of the 03-06 is much taller than the 07, which is why I wanted to use it.