infiniticrypto

I really appreciate your replies. Was that your truck that made 630 wheel on stock pump? Anyone know who manufactures the factory pump? I might have come up with a slightly better than factory option that's 100% drop in, still doing my homework.

smokinlmm

Yes it was my truck. The hellcat pump is almost drop in, will supposedly support 800 or more tire on 93. Stock flex pump is about equal to a 255 Walbro if I remember correctly.

infiniticrypto

I'm sorta pumped.....pun unintended! I think I found my out....in the cleanest way. I"ll just copy and paste from a post I just made elsewhere.

I've scoured the edges of the inner webz and have seen lots of solutions that entail ditching the FCSM and running hoses and going return style. Also the option of stuffing a Walbro 450 in the factory bucket with some rigging. My tuner mentioned the Hellcat pump (Walbro 525) I'm not certain on how the FSCM reacts to higher current draw. Poking around for a few minutes it looks like some GM vehicles with FSCM use a 20 amp fuse, I'm assuming that's the circuit that powers the pump. So you'd be limited. Another vehicle (CTS-V) possibly uses a 30 amp fuse, I went out and checked this truck and it uses a 25 amp fuse. I think I've found what I'm looking for though. I went to the TI Automotive website and found that they offer a replacement module (could very well be the GM source) but they also offer a High Performance version. If the factory one is going to end up being close....I think the High Performance version gets me there with not having to hack anything up on the truck. The truck has 110k miles, so I wanted to drop a new pump/module in it anyway so I'm going to give the High Performance version a shot. Here is a flow graph I found on TI Auto site, I'm quite sure it's for the module I'm referring to. TU4005HV High-Performance-GM-Truck-Module.pdf

So if as you say the stock pump is close and it's 255lph, according to my math the High Performance TI Automotive module is 340lph. Of course there are nuances like a pump rating gets reduced once in the module because some pumping get allotted to the venturi. So is a 255lph the rating of just the pump.....and it's actually a little lower once in the module.....but the High Performance version seems to be rated including the module. If that makes any sense. I'm probably clueless and splitting hairs.

dryesl

Im no expert but had the same scenario about a year ago. I make 600 all wheel hp with a 223/240 btr cam and a d1sc. I bought fic 1000cc injectors but my truck didnt have a return system (2012) so i was told that needed to be addressed. I called up deatsworks (probably spelled wrong) and they told me that the reason they say their 400 pump says it doesnt fit a flex fuel truck is because it would be a downgrade. Supposedly the dw400 will outpump a walbro 525, so i ran their return kit and hardwire kit (was told by DW that this is the combo to run to support my hp) but so far ive been on that setup for close to 2 years and so far so good

smokinlmm

I did the aremotive phantom series hat with dual 450’s but I’m running E85 occasionally. I also ditched the factory system completely and ran a return style.

infiniticrypto

If I'm going to do a write up/journal on the build, I wonder where I should put it. In here specifically for GMT900, or forced induction....or......

smokinlmm

Forced induction.