So guys i been between the idea of just swaping to a carb or try and inproving my TBI, but damn with my limited budged and really no space to perform swaps like this i wonder if its really worth going to a carb for lets say 280-310 fwhp wich is why im looking at getting out of this 305 , is a TBI system capable of this ? I wanna mod the motor with cheap parts, a pair of vortec heads, this things are as cheap as they can be, litteraly junkyards are full of 1500 chevy trucks and suvs with vortec 350 on them, an Lt1 cam or equivalent , some roller rockers and a nice intake paired with a 454 tbi unit from a bigblock , to make it all work im going to buy the EBL flash system thats advertised on here and tune the car myself , this is going to be a first on both things. I think my 305 should be enough for those numbers, i dont want more out of it, the day i want a 500 hp monster ill just swap it all to a 350 stroker with all the goodies , if i can ever afford it :> , but for now those numbers should be enough for me to have fun with the car, take it to the track on the weekends while still being able to drive it anywere i want while maintaining acceptable fuel milage.

 

Could simply follow fast355's budget build sticky for a 340hp 350 vortec.

The LO3's stock TBI with 25-28psi fuel pressure is capable of 280hp, but you already know heads, cam, exhaust, fuel and tune must be upgraded.
For 280-340hp a "ported" 46mm TB should be anogh, 65,68 and 80lb injectors with correct fuel pressure will work.

A 305 with good heads, ehxaust, cam, fuel and tune should get you were you whant (carb, TPI, TBI, HSR,... as long as its tuned doesn't matter) cheap? probably not.

EBL to tune and use a VRFPR will save some money by wasting less fuel.

 

Yeah thats what i wanna do, i know its not going to be super cheap but not really expensive, u think a 454 tbi TB with 350 injectors tuned and with proper preassure could work good ? Ofc with good heads and cam.

 

What? 340hp 350, 310hp 305 or 280hp 305?

 

Yes, & I think you are on the right track w/EFI.
A carb & some used parts might be a little cheaper to get going, but I would NEVER make that compromise.
&
The EBL is NOT advertised here, just lots of happy customers. It's that good.

 

The 305, i want to atleast hit 280-320 HP to the crank on this 305, with those parts i think the little motor can do it.

 

What heads and what cam? Stock LO3 shortblock? How high are you willing to rev the engine? What cc are the pistons in the LO3? Are you going to keep the stock ECM and flash the chip?

 

Right now everything is factory, stock l03, motor runs strong also , has nice idle a pulls hard for what it is. My plan is a pair of Vortec Heads, Lt1 or lt4 cam or equivalent, a nice intake, wichever is the best that would fit vortec, maybe ill be getting a rebuilt 454 TB from ebay or try my luck on junkyards , 350 injectors or wichever are recommended for that power range, ill be getting the EBL ecm first and will install it in the car before i even start bolting on stuff, i will ofc will be getting a better fuel pump , a stock TPI replacement would be good enough i think.

Look i dont want a monster or anything , just a nice DD with some nice power , take it to the track some days etc, im planning on swaping a manual tranny after all of this is done to make it all work right.

Hey im happy if i can get 260ish rwhp out of it, thats good enough power for what i want it to do.

 

U have a nice build there yourself so if u can recomment me stuff that would be great, i know urs is a 350 but a 305 is fine also, my idea is just getting this 305 to make some nice power and keep it until the thing blows up, then when that happens if it ever happens, then ill just get a 350 and swap all the parts over to the bigger motor.

 

Ok so basically like in fast355's budget build sticky for the 350 vortec, but with a 305.

Could try to save $ at the beginning and reuse the stock TB with ultimate porting mods, datalogs will show if it is restricting.

 

I removed the walls on the TB that are next to the injectors, thats one of the Ultimate TBI mobs.

 

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I didn't mean to word it like that. Yes there is differences, but it's not worth it unless you build a very stout tbi motor. Big heads, cam, etc cause it will flow way to much fuel with those injectors

 

OK.. good advice, avoid the 454 unit & it's injectors unless your engine is built to require them & you have the ability to tune.

He is gettin an EBL dave & I really like his plan to install it on the stock engine to first learn tuning on a known platform.

 

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So a 454 unit is a bad idea ? U think my stock TB could handle the amout of power i want from my engine ? Yeah i guess i would need bigger injectors if its needed. And yes the first thing im going to do before i even start bolting on stuff is buying the EBL and putting it on the stock motor, learn how to tune the motor when in stock form so when all the better flowing stuff is in it i will know what to do instead of being loss. Also what im thinking of doing is leaving my stock ECM as it is and get a new one to install the ebl board into, you know just incase things dont go well i would be able to just slap the stock computer back on , since this is my DD car i kinda of also needed to drive me around lol. I will be buying all the parts i need first and when the day comes then everything gets done fast.