Stock flex fuel pump. How much flywheel hp can the pump support on pump 93 octane? Thanks

 

About 650 rwhp is maxing out the flex pump.

 

That sounds like great news as I'm building a 2013 Sierra Denali 1500 AWD 6.2L and the goal is 650 flywheel so if it's good for 650 rear (all) wheel (assuming though an auto) that's a good margin. Thank you. I'll be writing up a post on the build soon.

 

Sounds like a fun build keep us posted on it.

 

probably limited by the stock flex injectors before the pump

 

The injectors aren't relevant to this equation. Magnuson ships the blower with shitty "no room to grow" 50 pound injectors and I don't feel like playing eff eff so I'm going straight to ID1050X. Overkill I know, but they no longer offer anything smaller, I know they'll be as good as it gets and will NEVER have to worry about fuel again. I just didn't know how capable the Flex Fuel pump is.

 

I said the same thing when I did my 1050’s. I’m am now out of injector on E85. Lol. Going to 1500 next.

 

Yeah no chance of that happening for this truck as we don't have E85 for at least 500 miles. I'm sure at that point I'd be doing an entire fuel system, which I'm definitely going to avoid. Just got a call this afternoon from the engine builder that the engine (long block) is ready. They ran it on the engine dyno for break-in, leak checking, and retorquing etc. Naturally aspirated, they slapped a stock LS3 intake on it with 90mm throttle body and 1-7/8 header it made 564/530. Sounds pretty good to me especially considering the new pistons brought the compression down a little. Stock displacement and BTR PDS Stage 1 cam, Should be pretty easy for the TVS1900 to make the 650 flywheel. Lots of parts are coming in daily, now the wait is headers to be built 1st week of July and then sent to Jet-Hot where they say about 5 weeks, meanwhile I have to send the trans to Circle D as I put a down payment to get in line last week and they were saying 8 weeks.

 

when you say 650 rwhp, is that with some tuning of the FSCM? Or is that leaving the FSCM untouched? Thanks
Here is the after break-in. Obv. this is naturally aspirated form, they threw on an LS3 intake/90mm TB. 9.9:1 compression.

 

There was tuning involved. Truck made 630 tire with fast injectors and stock pump.