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But what's the fun in that? It's more fun in taking the challenge in seeing what you can do with the cards you're dealt, right? Anyone can swap a Vortec or an LS but, can you build a TBI and tune it to get the torque and HP you want? Yes you can, enjoy!!!Though I hate to say it.
LS swap it.
300 hp easy and reliable.
i guess we need to redefine "stock" longblock?
Well, You don’t necessarily need 454 injectors, it depends on fuel demands. In my case, the 350 injectors couldn’t do the job, we had the pressure cranked to 26 psi - it worked but that’s not sustainable for road use. So 454 injectors went in, pressure came down and was eventually settled at 14psi.
It’s a smidge rich at idle, but perfect through the rest of the rpm range.
If you look up “ultimate tbi mods” you can see what all needs to be done.
Fortunately the dyno guy here is a very thorough dude. Bench flowed my tbi unit, then again with the pod spacer. We also ran with and without the tbi spacer. It actually did improve the Hp and tq numbers.
In your case if you just went with a stock vortec long block with appropriate intake, you likely would be fine with the 350 injectors and a bump in the pressure.
I did similar stuff with mine - the 61#/Hr injectors @ 18PSI were running a DC of 99% - 106% (meaning they were open all the time) at WOT in 2nd gear @5200RPM. Here's a screenshot from my EBL Flash2. I jacked it up to 28PSI and got my DC down to ~85% but they started dripping and caused a stumble @ idle.Well, You don’t necessarily need 454 injectors, it depends on fuel demands. In my case, the 350 injectors couldn’t do the job, we had the pressure cranked to 26 psi - it worked but that’s not sustainable for road use. So 454 injectors went in, pressure came down and was eventually settled at 14psi.
It’s a smidge rich at idle, but perfect through the rest of the rpm range.