The Freak

Hello everybody! I have a 1992 Camaro Heritage Package Camaro, Engine's getting worn out and leaking head gasket and chugs and all so i bought another engine w/ same block casting same year and everything with only 77K miles on it and ran fine and no smokes whatever.. im planning on rebuilding it, I WANT around 350 Horsepower! I know 305's Tiny compared to those 350/454's but hey doesnt hurt to try.. SO CAN YOU ALL HELP ME OUT HERE? with details/ what pistons, cam, and all those internal stuffs, i want to keep the exterior stock looking since theres a guy with a 1997 Trans Am who mocks our poor 305's betting 1500 bucks on a race.. So LET ALL PUT OUR HEAD TOGETHER, AND SEE IF IT'D REACH 350 OR MORE HORSEPOWER.. let me know Thanks guys!
Blake

Heres the car that's gonna be worked up.. and help it achieve to wipe the egostical 4th gen bird!

90FormulaWS6

you have no shot hitting 350 hp naturally aspirated w/ a 305tbi... sorry to burst your bubble

The Freak

i thought so, but just didnt hurt to try to ask, since Possible somebody out there might hit something High enough.. something w/ specific piston ratio, rod length and all..

DLV555

iTrader: (1)

I don't know if anyone has made that much NA on a TBI 305, but there have been some impressive numbers around here. You could build a pretty stout 305 and then give it a little bit of goofy gas to get that extra bit you're looking for. Although it will take a lot of time as well as money to get it there. As anyone here will tell you, you're gonna need to get really comfortable with ECM tuning to get big HP numbers from a TBI 305.

The Freak

true ive noticed some ppl get amazing horse power such as 275.. but just that ive seen a 260 horse power Honda Civic and it only has 4 cylinders when the camaros got 8, and should have the ability of increasing much more, thats why im up for it trying to increase it to some kind of number that'd be very respectable on the street such as 350 horse..

STOLEN RS

yeah,unfortunatally those hondas have us beat in volumetric efficiency.i say use forged pistons and spray the hell out of it!!! there are 334 stroker cranks for 305's,but if your gonna go that far i'd just do a 350,or 383...

TigerZ

hondas use OHC and DOHC

so theres really no comparison on motors


chevy finally took a hint for the LS10

ive also seen 347 stroker kits too. forget where the link was though

itd be pretty unique

roots style blower???


lol

but for real
heres a link on a naturally aspirated 305 without any kits

http://www.mainstreamtopics.com/foru...showtopic=3266

he pulled 324bhp at 4800rpm

350 shouldnt be that crazy to acheive, and if you shove nitrous in that thing youll easily hit over 350 hp

r0nin89

Fast355

iTrader: (2)

300 RWHP @ 6,300 from 312 CID through open exhaust, NA, and TBI!

I attached a desktop dyno screenshot of my 300 RWHP 312 setup. It made 300 RWHP which is around 370 flywheel hp (assuming 20% loss @ peak HP) through the cutouts, this simulation predicted 385 @ 6,500. Could actually be making those numbers though, because I have no idea the drivetrain loss of a van vs. F-body.

BMmonteSS

You guys are making this way too complicated...first off sell the 305. Buy a crapped out 350. You can get one for less 100$ at junk yard and then build it from there.

A vortec headed motor with mild 218* cam will get you to your HP goals with the proper bolt ons. I assume your goal is to make about 320 HP at the wheels and run low 13's to high 12's so you can outrun an LS1 firebird? aren't 97's LT1's ? If it's an LT1 then high 13's will get you to your goal and you'll only need to make around 275 to the wheels.

Any way you look at it it's going to be much cheaper and easier to run that fast with a 350, and no one will ever know it's a 350 unless you tell them.

No offence but your knowledge of cars seems pretty basic, which tells me you haven't built a motor before. I hate to see you put 2500$-4000$ into a nice motor and blow it all over the pavement because you didn't have the expereince to do it right. A crate motor might be a better route for you. Check out the GM HO 350, it makes 320 hp and will run you mid to low 13's.

The Freak

Ive rebuilt motors before but usually 400's over such as pontiac 400/olds 403 for 2nd gen trans ams and 454's those can easily get 375.. So im up for the challenge of rebuilding a small motor such as 305 into a higher power.. nothing wrong w/ asking for help isnt there?

True no one would know its a 350 unless i tell them you're right but yet somewhat id like to let it have a matching number for the heck of it with some kind of power underenth it

BMmonteSS

Absolutely nothing wrong with asking for help.

You'll be wasting money and driavability not to mention power by going with a 305 over a 350. I just can't wrap my mind arround the whole "number matching" thing......I just can't see these cars being worth as much as the old muscle cars of the past.

Any ways the key to making 350 hp with a 305 is going to be heads, cam, and learning to tune your ECM. Please....Please listen to me and others when we say that you shouldn't even begin to pick up a wrench unless you have solid understanding of tuning your ECM yourself. Mail order crap won't work at the level you want to be at.

Your going to need a pretty big cam and your power band is going to be up there so plan on a 6500 rpm redline and all the necesary hardware to make it turn that fast reliably. Also do you have to pass a smog test? That will play a huge role in what you can do. Also what is your budget for this project, your in deep dodo if you only want to spend 2g's.

TigerZ

hahah the only reason im posting on this old-*** post is because i found it on google while searching for something else lol


you should just drop a turboed 383 in it and call it a 305

:P

IMO

FreeLoader

okay first, it's NOT impossible to get 350 out of a 305, but doing won't be easy or cheap, you're talking about replacing everything but the block and the crank, at that point(and you might as well change the crank).

you'll never pull those numbers off of ported stock heads, I'm sorry, no matter how well people can make them flow, they still just can't compete with good set of vortec, e-tec, dart I.E's, hell, truth be told, s/r torquer's would still probably do you better.

you'll want bare minimum lt4 hot cam specs, if not better than that for your cam.

you'll want to at LEAST get the holley 670 tbi.

at least port your intake manifold, but more likely replace it.

upgrade all other parts of the engine, lighten what you can, and raise the compression a bit if you can.

then...tune, tune, tune.

in fact, before doing any of that, do a few test setups similar to what I'm talking about on a simulator (desktop dyno, others of the like) and see what you come up with, you'll get a better idea from there.

btw, BMmonteSS is right, don't even approach this project unless you've got some serious hours of tuning on your shoulders, this kind of thing could take literally months to tune properly, and that's assuming you've got some real good equipment to work with.

FreeLoader

oh, and so you fully understand the weight of what you're taking on, you're also gonna want to replace your distributor with a billet msd one, your radiator, msd coil, 8mm superconductor wires(or any decent variation), at that point those are gonna start becoming very important as to how much power you're making.

and fuel pump, fuel pump will need to be changed.

you'll also need to figure out a decent "other than stock" air intake setup.

I'm not trying to dissuade you, I'd love to see more true n/a muscle 305's on the boards, but you have to understand that with these engines, it's not as easy as slapping a set of heads and a cam on it, making a few screwdriver adjustments to the the carb, and driving away.