Hi everybody. I knew that the best place to get the answers im looking for is from the experts themselves. I was wondering what type of power will I make with some parts I have lying around if I put them on my good ol' LO3.

Lt1 cam from a 97 Firebird
305 vortec heads with z28 springs
edelbrock performer RPM intake manifold with a tbi adapter
extreme-FI 46mm throtle body with 60pph injectors and adjustable fuel pressure regulator
1.52 rockers with roller tips
new stock replacement lifters from trick flow
hooker 2460 headers going into a single exhaust that dumps in front of the right rear wheel which consists of a 3" high flow cat and a glasspack muffler
cloyes double roller timing chain.
and a 255 lph fuel pump.

i would like to know what numbers to expect on a rough tune, decent tune, and a right on the money tune.

would like to know hp at the crank.
any answers would be greatly appreciated.

thanks in advance and you guys are the best.

 

You will prob be looking at 230-240 rough tune 260-270 with head work and with a spot on tune.

270 might be pushing it though. I would be looking more close to 240-250 realistically. These are numbers at the crank.

 

Really that's it? I thought 270 would've been easier to achieve. What would you recommend to increase my chances of reaching 270 280

 

You will need more cam and a lot more tuning. Everything comes down to the tune. With the stock tune, that combo will run worse than stock and be slower, bog more and eat gas. You will hate it. I would spend the money now on the tuning gear so that you are well versed in tuning before you add big mods. After that, your combo is sound, minus the heads. The performer intake will not mate up to the vortec heads. The 305 vortecs aren't the same as the 350 vortecs so I might look elsewhere. I am also not familiar with the throttle body you have picked out. Is that another form of FI that is not TBI?

 

Thats it? I would be happy with those numbers from the L03. Basically your stock motor puts down 170 at the crank. The cam comes out of a 350 with 285crank hp. you have a 35 your not gonna see the same amount of hp. You might get a 30hp increase if you are lucky. The heads if they are stock 305 heads you might see another 15-20. The intake manifold 10-15. Roller rockers maybe 10-15. With the exhaust you are just freeing up hp give yourself another 10-15hp. On a good day you could expect 265. these numbers are just averages. You should never expect the same as the gains from each component will change with the other parts you put on.

Do some head work, Mill, Port, Polish. Flow test.
More aggressive cam hydraulic roller
Electric water pump
larger aftermarket springs
aluminum rockers
hydro Roller lifters
Go for flat top pistons and higher comp ratio
lighter& stronger rods
True dual exhaust
Spend your money on a good tune

You could possibly expect 350-375 from the ol'305