Can I run a Walbro 255 on the stock system?

[chriso]

I just bought a Walbro 255 fuel pump and was wondering if I could install it and run everything completely stock until I pass smog and then proceed with my upgrades (Lex AFM, 550's, AFPR, etc...). I just don't want to overload my stock regulator, hoses, etc... and throw off my AFM while trying to pass smog. Will the stock regulator handle the added flow from the new higher flowing pump?

 

[shaeff]

drill out the J-pipe, and you should be alright. you *MIGHT* run a little more rich with the wally, and no way to adjust it.

your stock regulator will be ok.

-shaeff

 

[boost fiend]

i run a walbro and stock injectors. no problems here. that is untill im gettin on it and shift then POP! you hear it backfire between shifts sometimes. (atmospheric bov). im getting rid of the j tube this weekend! dont forget to make the return hole in the tank a lil bigger.

 

[theDon]

i run a walbro and stock injectors. no problems here. that is untill im gettin on it and shift then POP! you hear it backfire between shifts sometimes. (atmospheric bov). im getting rid of the j tube this weekend! dont forget to make the return hole in the tank a lil bigger.

ha, exactly what I have seen running walbro with stock fuel system and Bosch BOV lol. But in my case I also had full 3" catless exhaust which also helps that along.

and also you could just bypass the J-tube all together rather than drilling it - accomplishes the same thing.

 

[TurboStreetCar]

i run a walbro and stock injectors. no problems here. that is untill im gettin on it and shift then POP! you hear it backfire between shifts sometimes. (atmospheric bov). im getting rid of the j tube this weekend! dont forget to make the return hole in the tank a lil bigger.

the tank return hole needs to be enlarged too?? i thought the j tube was the only thing???

 

[shaeff]

the only thing that needs to be enlarged/bypassed is the j-pipe.

-shaeff

 

[jmcboost]

i run a walbro and stock injectors. no problems here. that is untill im gettin on it and shift then POP! you hear it backfire between shifts sometimes. (atmospheric bov). im getting rid of the j tube this weekend! dont forget to make the return hole in the tank a lil bigger.

I have not ever heard of making the return hole bigger, what is that process?

 

[boost fiend]

sorry, was not thinking clearly. all you really need to do is bypass the j tube. ive heard that some supra's return line in the tank needs to be opended up a lil more. so i have heard.

 

[gixxer750]

just take the j tube plate completely off, go get a SBC fuel pump blockoff for like $5 from your parts store. Then run some 5/16's hose from the nipple coming off the fuel rail (pressure regulator) to the fuel tank return on the lower drivers side of the engine bay.