85T/A?

hey guys i just got my 305 out of a 77 camaro into my 85 bird to replace the blown up v6. its rated at 145 hp and my v6 was rated at 135 hp. right now it has an edelbrock EPS intake on it and a holley 650 vaccuum secondary. it has full exhaust and an electric fan. my budget isnt a big one so i have small hopes for this little motor. my stock cam specs are: 179/195@50 on a 109 LSA, 106 intake centerline .234/.257 lobe lift. my plans for this thing is:

1.7 roller rockers ( which brings my lift to .265/ .291)
under drive pulleys
750 dp holley carb
my posi unit (wont give me hp but more fun to drive lol)
MSD 6AL ignition box
aluminum driveshaft

with all thats done to it already plus the things that i plan on doing how much power should i expect out of this combo? i put this together myself so if you guy/gals have any better ideas on how to save my money or get more bang for my buck be my guest. thanks in advance!

CamaroRS_92

A good cam is key with a small block, don't go crazy though. A mild Edelbrock will do just fine. Be careful though with a 750 dp. That's a lotta carb for a 305. You don't want to overcarb and bog. Plus too, you'd have to step up the fuel pump too and possibly install a pressure regulator. Friend of mine has a 305 that's mildly built that we put an Edelbrock 600 or 650 Thunder Series on and it's proven to be a good match. 3.73 rear gears will be a nice help too.

InfernalVortex

iTrader: (4)

Really, really not worth teh trouble. The compression is too low to go too big on the cam. Just save the money and build yourself a 383 on the side with some nice aluminum heads and a roller cam. You'll spend way too much on that 305.... Even a 3rd gen LB9 305 is a much better starting point than that.

Im not saying it's a bad motor or anything, but you're never going to see even 200hp out of it without spending $1000+ on it. Just put a nice exhaust on it, let it sound like a v8 and tune it well and enjoy it.

Ignition mods (MSD) are not going to gain you anything. MAYBE a little bit of fuel mileage... MAYBE. Underdrive pulleys are not going to be worth the trouble for what little you gain from them. A holley 600DP is going to be WAY better than a 750dp for you. I'd stick with a qjet if possible. You're barking up the wrong tree putting giant carbs and fancy ignition on a smogger 305. No amount of fancy parts outside the engine are going to change the fact that it has a tiny cam, terrible heads, and low compression, and that will always hold you back.

85T/A?

i have 3.42 gears on it and im still undecided on bumping that up but i avoided doing the cam because im not to familiar with puting one in and taking them out. if i knew how that would be the first thing i change because i like the lope. but if im not mistaken they came stock with quadrajet 750's. at least my buddys 85 monte did and he also had a 305

InfernalVortex

iTrader: (4)

A quadrajet at 750 cfm is a way different thing than a 750 double pumper. The qjets are vacuum secondary carbs, so they only open as much as the engine needs. A double pumper will open up in response to the gas pedal ONLY. That means it's going to be a LOT harder to tune and a lot harder to keep responsive. Not only will it run worse, it will give you ZERO power gain on your engine. Stick with a qjet. You could get a 750 ish cfm vacuum secondary carburetor, but why bother when the General already designed the perfect carb for you?

You cant go very big with the cam anyway, not with the low compression you have. If you got a cam big enough to lope your car would probably make less horsepower than it does now.

3.42's are perfect. Get a posi. Have fun with it.

85T/A?

I have a 350 on the back waiting to be worked with so it sounds like ill be building that then. I have full exhaust on there now so I'm headed somewhat in the right direction. I only wanted underdrive pulleys because I thought it made sense when I put new polished aluminum ones on lol but sounds to me like its not even worth fixing. Thanks guys for not letting me spend the money I don't have anyways haha

CamaroRS_92

Much agreed, which is why I said mild cam earlier. Stock compression is like 9.5:1 on a 305. Qjet or edelbrock/weber style with avs would be best. If you have 3.42s then leave em alone. Like it was said above make it sound good and just enjoy it. My friend spent entirely too much having his 305 machine, bored to a 309 and forged pistons, crank, edelbrock intake n carb and msd ignition and it really doesn't make much more power than my 305tbi stock.

OrangeBird

iTrader: (1)

Speed = Cubic inches X Cubic Dollars , Squared .....

InfernalVortex

iTrader: (4)

He said it was a 305 from a '77. That most likely means an early LG3. Allegedly they were 8.5:1 in '77, which is better than I expected, still not great. Maybe something close to a stock cam from a 92 L98? 202/207, .420-450 ish lift range. Thats just not gonna be worth the trouble or cost of installing it.

Get yourself a roller 350, put the money into that. if you do ANYTHING to the car as as it sits, make a decent exhaust system. Some good shorties and a 3 inch catback. If at some point you get a nice 350 or 383 in there, you'll need to buy that anyway. And it might improve your fuel mileage too.

cuisinartvette

1.7 rockers will give you more hassle than its worth
Better check your pushrod length check for binding and get a good spring on there youre going to need it.

85T/A?

thanks guy i appreciate this. i have flowtech headers into a 2.5 inch flowtech y pipe increased to a 3 inch catco highflow cat to a 3 inch flowmaster right now.


in the video the timing was a little off. ill have to get a better video of it out of the garage. the timing is set at 8*. can i up that more or should i leave that alone considering its just about stock? and believe me that 350 in the back corner of the garage would be in the car if it wasnt only a bottom end and it lost oil pressure