I am building a 305 for my 82 Pace Car (I want to keep original motor) and am looking for high 13's without NOS.

Tell me about what you guys are running and what your mods are?? I want to keep it stock appearing (except maybe headers) and it is a carb car.

Thanks in advance

Tom

 

I'm not sure exactly how much the "original motor" part is really worth, other than being able to say, "It's the original motor."

But, some suggestions. See my sig - do everything in it. You'll need flat-top pistons to raise the compression (mine already had them), better heads or at least extensively ported stock w/1.94" intake valves. You'll probably need to modify your carb to get the secondary AV to open all the way (detailed in tech article).

If I had 3.73's, traction improvements, a tranny that does everything it's supposed to do, perhaps a better converter, I'm confident I'd be running at least 13.99 at sea level. Without a higher stalling converter, you'll be a dead duck off the line, so consider a Vigilante or Continental. And, as I think about it, you probably have a TH200, so you're going to need steeper gears (bye-bye to highway cruising) or put in a TH700.

If you're really fixated on keeping the orginal block, a 334 stroker kit would also help achieve your goal. Of course, anyone who knows enough to look for the VIN in the block s/n will also recognize the externally balanced damper.

 

Heads, cam, headers.

 

Go to chevyhiperformance.com. Click on the link that says...ummm...it's either "feature stories" or "specials" or something like that...look for the "my generation" series...it is a series of five atricles about their buildup of a thirdgen camaro with a 305.

 

Except they didn't get into the 13's until they sprayed it.

 

The My Generation Camaro was a weak performer to base your buildup on. Maybe if they used a bigger cam.....

 

I was going to try the Vortec heads and go with about 9.5-1 compression. I definately want to be able to drive this car anywhere!! I guess I am looking for some idea on which camshaft to go with?? I was thinking maybe like a 268 or 270 duration???

Thanks

Tom

 

I guess I just don't get it.

You want to keep it a 305 and stock appearing, but you're willing to go with Vortec heads and the required special intake manifold with the mount bolts sticking at a "funny" angle for a SBC, and you have to use center-bolt valve covers with those heads. You'll have to shave them to keep compression up to factory, use flat-top pistons to reach your stated goal; use self-aligning rockers, replace the truck valve springs with some real performance parts...

Why not put a 350 block with World S/R Torquer heads, perimeter bolt valve covers, stock or stock-like intake, a cam like mine, headers (you already said you're willing to do headers) - that will look more "stock" than what you're proposing (externally, you can't tell the difference between a 305 and 350 block without checking casting numbers), and run a bunch better - much more likely to obtain that 13-second timeslip of which you dream.

 

I guess I want to build one because it seems EVERYONE who builds a small block builds a 350. I have had about 15 350 motors and I have had them running 12's, now I want to try something different.

350's are EASY to get it the 13's, doesn't anyone like a challenge or to be a little different????

Tom

 

Hang on a sec...<b>you</b> did everything in your sig and only ran a <b>"Best 15.77 @ 90.1"</b>.

How's this going to get him into the 13's?

As for the whole "run a 305 and be a little different" thing posted later, I really don't get it. Running a turbocharged V6 is different, and you end up with a fast ride.

Throwing parts at a 305 and getting your butt kicked by other V8s is kinda hard to understand as a goal.

 

Amen brother.

Just remember to that you're not throwing your money away at the 305 because everything is interchangeable with a 350 (or almost any other SBC)

 

Know anything about atmospheric pressure?

Note that my sig also says "at 5800' Bandimere". That is five thousand, eight hundred feet above sea level. A typical day here will have an absolute atmospheric pressure of 11.9 pounds per square inch or less, vs. the "standard" sea level pressure of 14.7 psia. If you don't think almost 3 psi atmospheric pressure makes a difference in engine power, you need some education.

NHRA has a standard set of factors for correcting sea level times & speeds to observed times & speeds at a given elevation, which when applied to my times & speed produces 14.62 @ 97 mph. I say all that in my sig. That, by the way, does not include actual barometric pressure or humidity, and since all factors combined equated to almost 8000' the day I made that run, on a good day at sea level I may even do better than the corrected time.

I also said in my response that I needed gears and traction, and perhaps a better torque conveter (as well as a tranny that shifts from 2nd to 3rd at WOT), to improve on what I've run. With those, THEN we're talking sea level 13's.

Do you understand now?

 

I understood the first time. To restate what I said previously, you haven't built a 13sec car...at either 5800' or sea level.

(lame bench-racing retort from five7kid to follow...)

 

If you understood, it wasn't clear from your post. If you want to make yourself feel better by putting down others, you're on the right track. Most of us are here to promote the exchange of information, however.

Indy, you obviously have more experience than was evident in your original post. We often hear statements like "You can make as much power from a 305 as a 350", and those kind of people need to be enlightened. You have another agenda.

Let us know what you decide to do. Those of us who have limited ourselves to a 305, for whatever reason, like to hear how others are doing with theirs.

 

I just posted this topic so that I could save a few $$. I understand everyone has their own opinion, lets just keep the negative stuff to ourselves. I have indeed built several engines in the past, but this is my first shot at trying to get some power out of a 305. I know it is easier and smarter to build a 350, 383 or even a 400 instead of a 305, and I know that they basically all look the same, but I am just experiementing with this motor.

Maybe someone out there stuck a certain camshaft in their 305 and it made great power, maybe someone else stuck another in and it sucked, I am just trying to hear some of you guys experience. Eventually some of these parts will prolly work there way onto different motors, maybe even 350's or the other sort, just trying to come up with a little combination of parts to give this 305 a power upgrade. I know that the basis is there for some high 13's sec quarters, just trying to keep costs at a minimum while trying to figure out the right combination.

I appreciate all your guys input!!

Thanks again

Tom

 

I just have a thing about people talking out their azz.

 

Edit: Never mind, not worth it.

 

Now we're talking...I put a used cam into mine; it came from a rebuilt 400 that was installed in a small motorhome. The only spec's I have are the lift, and those measure 0.420" at the valve for both intake and exhaust....not big by any means.
The engine is a low-compression 84 LG4 with over 225,000 miles on it - the heads have never been off. Stock cast iron intake and the Q-jet has a set od DR secondary rods and an 'N' hanger (for now). Hedman shorty headers and y-pipe with a Dynomax 2&frac34;" catback round out the mods. I recently ditched the stock engine-driven fan for an electric one.
With a T5 and 3.42 open rear on street tires, I've run a 14.494@97.61 with a 2.26 60-ft time. Link to the slip is in my sig...
I hit 98.69 mph later in the day, so I *should* have enough HP to hit 13's....I just need some chassis work to launch better

Good luck in your quest

Pete

 

Good to hear I'm not the only one interested in building up there 305. Its sad that a thread on building a 305 always becomes - Just build a 350 or why a 305 and other such

My suggestioned course of action would be:

Stock rebuilt bottom end with flat tops(9.5:1).
S/R Torquer heads (58cc)http://www.jegs.com/cgi-bin/ncommerc...41&prmenbr=361
or L98 aluninum vette heads about $600-800 used/e-bay
Performer intake or something similar
Rebuilt non CCQ-jet or 600cfm carb
Moderate cam. Suggest roller hyd. or solid.
Shorty headers(ceramic coated if posible)and Y-pipe
Cat-back exhaust
Straight pipe cat or High flow if absolultly neccesary.
Touque converter if auto.
3.73 posi rear
Upgraded suspention. Control arms($87), panhard rod($89) and torque arm($260).
Sub frame conectors
Relocate battery to trunk for extra traction and weight transfer.
And good tires on light weight rims.

That with some tuning should put you into the 13's easy. And if you change you mind latter on every thing will change over to a 350. Plus the 58cc heads produce lots of compresion on a 350 (10:1 dished 12:1 flat top???)

Keep us posted on how things go and good luck.

 

yeha, theres nothing wrong with a 305, if you want to build it up go for it, don't let the "build a 350 guys" get ya down. do soemthing different for once, i've seen many 305's running faster times than 350's on here, what's a few cubic inches,lol