First off, did Walbro release a pump directly for our cars or are we still having to modify the intank assembly to make it work? Also, is an aftermarket FPR needed with the Walbro? Would there be any needed K-pro changes with the Walbro?

Lastly, I plan on running either c16 or water/meth injection...What do you guys see our motors limited to in regards to higher octane levels? Just curious what people think. Thanks

i believe that walbro released a pump for our cars, but the intank pump has to be modified slightly. You do not need an aftermarket fpr unless u are running a return line and are bypassing the stock fpr. Kpro may need to be retuned because u are increasing the volume of fuel and therefore your injector duty cycle may change, but if you're not maxing ur injectors out, u probably won't need a retune.

I honestly think that our motors can withstand boost levels of aprox 16-17psi in stock form utilizing c16 or water/alcohol injection as long as it has a good tune. Although i wouldn't rev the motor out to anymore than the stock rev limiter would allow. I've hit over 15 psi a few times on the stock motor with no adverse effects. I wouldn't recomend doing this on a daily basis however.

 

the walbro in tank pump sold on this site is specifically made for our cars, but because of our returnless setup, we have this crazy contraption in our fuel tanks that b-series/d-series/most other cars don't have...the walbro pump is made for our cars, but is slightly larger than the current pump (i'd think if they could have made a smaller one, they would have so this is probably as good as it'll get)...so slight modification to the stock assembly is necessary...it really isn't as big of a deal as it seems though, you pretty much just have to cut some plastic in order to make this slightly bigger pump fit

and you will probably want to do some slight tweaking on the kpro as the walbro pump will push out a decent amount more fuel pressure (i don't have a fuel pressure gauge in my car anymore though so i'm not sure exactly how much pressure it is pushing)

 

wow, 16-17 psi? At around 10 Im probably making 310-320whp right now....I cant imagine going any higher than 350whp, probably at 13-14 psi....

 

Get the GSS-317 which is a 255lph pump that maintains normal stock fuel pressure as opposed to the GSS-340 which is a high pressure version. You will not need to change anything in k-pro other than maybe slightly retuning the very top of the rev range under boost where the fuel pressure would have been dropping off with the stock pump. Basically the 317 will allow you to keep a consistant fuel pressure at higher volumes of fuel flow...if you got the high pressure pump, the fuel tables would need to be completely retuned, as there would be more pressure behind the injectors, therefore more fuel for each pulse...

 

Which pump do they sell in the CRSX store? I ordered it a few days ago.

 

yeah i ordered the crsx one and have had it but not installed yet.its the gss342 model.what kind is that? how does that one perform?

 

btw,this sucker is TINY!!!!

 

yeah i ordered the crsx one and have had it but not installed yet.its the gss342 model.what kind is that? how does that one perform?

That's going to be the high pressure version...