# Walbro Pumps...Norm VS. High Pressure **URL:** \ **Category:** SON240sx Automotive\ **Created:** [July 25, 2005, 6:41pm UTC](https://forums.speedlife.net/t/walbro-pumps-norm-vs-high-pressure/87431 "2005-07-25T18:41:14Z")\ **Posts on this page:** 7\ **Page:** 1
**Author:** ![DarkForceJackal](https://avatars.discourse-cdn.com/v4/letter/d/b38774/32.png) [@DarkForceJackal](https://forums.speedlife.net/u/DarkForceJackal)\ **Post date:** [July 25, 2005, 6:41pm UTC](https://forums.speedlife.net/t/walbro-pumps-norm-vs-high-pressure/87431/1 "2005-07-25T18:41:14Z")
Are there 2 different kinds of Walbro 255LPH fuel pumps (S13b)…ie. high-pressure and regular pressure? ---
**Author:** ![SHIFT\_KA24DET](https://avatars.discourse-cdn.com/v4/letter/s/b9bd4f/32.png) [@SHIFT\_KA24DET](https://forums.speedlife.net/u/SHIFT_KA24DET)\ **Post date:** [July 25, 2005, 11:04pm UTC](https://forums.speedlife.net/t/walbro-pumps-norm-vs-high-pressure/87431/2 "2005-07-25T23:04:35Z")
Hi-pressure is what you need, the low pressure one is for Carbed cars. ---
**Author:** ![DarkForceJackal](https://avatars.discourse-cdn.com/v4/letter/d/b38774/32.png) [@DarkForceJackal](https://forums.speedlife.net/u/DarkForceJackal)\ **Post date:** [July 26, 2005, 5:05am UTC](https://forums.speedlife.net/t/walbro-pumps-norm-vs-high-pressure/87431/3 "2005-07-26T05:05:02Z")
Reason I ask is I just bought (and received) a fuel pump and kit from Truboost: [https://www.truboost.com/catalog/product\_info.php?cPath=26\_28\_67&products\_id=113](https://www.truboost.com/catalog/product_info.php?cPath=26_28_67&products_id=113) and wanted to make positively sure it was the supposed “high pressure” model. Is it? Thanks… ---
**Author:** ![DarkForceJackal](https://avatars.discourse-cdn.com/v4/letter/d/b38774/32.png) [@DarkForceJackal](https://forums.speedlife.net/u/DarkForceJackal)\ **Post date:** [July 26, 2005, 12:24pm UTC](https://forums.speedlife.net/t/walbro-pumps-norm-vs-high-pressure/87431/4 "2005-07-26T12:24:48Z")
For anyone interested, I managed to answer my own question. There are indeed two different 255LPH Walbro pumps available for 89-94 240’s: Part # GSS315-400-766 - Normal Pressure 255LPH Part # GSS341-400-766 - High Pressure 255LPH Fortunately, I have the latter as desired. This also may explain why some people using Walbros complain about running rich and others are fine. ---
**Author:** ![AmIdYfReAk](https://avatars.discourse-cdn.com/v4/letter/a/a4c791/32.png) [@AmIdYfReAk](https://forums.speedlife.net/u/AmIdYfReAk)\ **Post date:** [July 26, 2005, 6:35pm UTC](https://forums.speedlife.net/t/walbro-pumps-norm-vs-high-pressure/87431/5 "2005-07-26T18:35:05Z")
the loopback system could be Slightly plugged, Remember, The injector’s dont use Everything that that Pump is tossing at them… a large presentage is being looped back to the tank ( kind of a wase IMO ) Also, before any of you Jump down my throat, i know the injector’s will regulate the Flow, but older ones and etc will not do the Job Due to wear, and if fuel is being Pelted at it. You can pick it up from here 🙂 ---
**Author:** ![scribbles](https://avatars.discourse-cdn.com/v4/letter/s/bb73d2/32.png) [@scribbles](https://forums.speedlife.net/u/scribbles)\ **Post date:** [July 26, 2005, 7:31pm UTC](https://forums.speedlife.net/t/walbro-pumps-norm-vs-high-pressure/87431/6 "2005-07-26T19:31:38Z")
woo go 341 ! (I’ve got a bucket of these at work) althought the 342 seems to be more popular, prolly for civics and rice boxes ---
**Author:** ![SHIFT\_KA24DET](https://avatars.discourse-cdn.com/v4/letter/s/b9bd4f/32.png) [@SHIFT\_KA24DET](https://forums.speedlife.net/u/SHIFT_KA24DET)\ **Post date:** [July 28, 2005, 12:12am UTC](https://forums.speedlife.net/t/walbro-pumps-norm-vs-high-pressure/87431/7 "2005-07-28T00:12:28Z")
GSS250 190lph GSS278 190lph GSS315 255lph GSS317 255lph GSS341 255lph-HP GSS342 255lph-HP