Just got back from the track yesterday, cooler air but I still suck at launching this thing. Just thought some of you guys might like to see some results. mods in the sig.

 

Great accomplishment. It is always fun to kick a little *** with a 305. Gotta love showing up guys that are supposed to have fast 350s. I beat a truck that had a "built" 350, wasn't that "built" I guess. Anyway good to see great times from fellow 305 owners.

For everyones reference, my 312 TBI would probably be running those numbers if it wasn't stuck in a 5,300 lbs G-Van. I've run a 9.89 @ 69.08 in the 1/8 with a 2.19 second 60' time. I may have to swap to a TPI intake I have laying around with SLP runners, ported plenum, and ported base, with a 58 mm TB, just to see what the difference is at this power level. We can find out if TPI really is that much better.

The left lane was a stock newer VW beetle with a 2.0/ 4 cylinder/Automatic.

 

That is impressive!

The only run I ever made with my Camaro was 13.7 @ 102.
That was the 355/SuperRam on a stock tune and failing fuel pump.

 

Good numbers bro

 

Thanks guys. It was a good time. As usual though, there was only one other thirdgen there. It was a tube chassis race car in the 8s. For some reason there are almost no thirdgens in this area, and the few that there are are mostly junkers. At the camaro superfest this summer I was really dissapointed at how slow most of the thirdgens were, mine was the fastest one there! thats pretty sad honestly.

 

Nice dude, your mph shows that your makin some good power. Good times

 

how much lift does that cam make? how big of valves are on those vette heads and how much work is actually done to them?

 

That's pretty good, beat my mph by 1.

 

Smurfin Z28,

my cam specs are as follows...
214/224 .442/.465

My sig is actually misleading, I really should change it. The vette heads have the stock 1.94/1.50 valves (not even a 3 angle job on them ) The intake ports are gasket matched to a stock size intake gasket and simply smothed a bit, same with the bowls. The combustion chambers are polished and the exhaust ports are simply smoothed and polished. What I am saying is there was no real port work done, just a clean up of the heads as they came. I also used the .050" thick factory L98 head gasket.

I only got to make 4 passes saturday, the last 3 passes had 100.28, 100.37, and 100.48 mph respectively. Hopefully I can get my launch technique down a little better next spring and knock down some 13.50s. I know lower gears would make a difference but I kinda want to keep the 3.23s for autocross.

I know that TunedPort335 and mw66nova have turned quicker ETs naturally aspirated than me but they are running automatics and cutting 1.8 60ft times. Tim Burgess apparently ran in the high 12s but I know next to nothing about his combination except that he has a 305. Does anyone on here have a stick car in the mid 13s NA? I am sure there are I just cant think of anyone right off hand.

I am also wondering at what point the stock intake will become a hinderance. mw66nova is carb'd, TunedPort335 and myself are both running stock intakes, how much farther can we go?

 

My car has a standard and is in the low 13s but I have a little different motor

Seems like there was a guy either here or at cz28 a while back that had a 305 5 speed car running in the 12s.

 

Dang, I'd like to find these guys and see what they are running. I can see the search button getting a workout already. My main question is what intake are they running. I would imagine they have to have low gears to get that ET out of a displacementally challenged 305.

 

with good traction it seems that 10X.xx mph nets 12s ETs easily Seems to me with a lil' more lift (maybe even just some 1.6 roller rockers) and some more work to those heads you could be there. What kinda tires you running? I am also traction challanged. I dont think my T5 and center force clutch are helping me in that department.

 

I still think we have alot left. You definitely have good MPH, you just need to get some tires on that thing in order to launch it.

I know my 13.4 runs were far from "perfect". i had a full size spare 215/65/15 and jack in the back of the car. 3/4 tank of gas and letting off the throttle a little bit for each shift, and hitting the rev limiter at the top of 2nd

I have since lightened the car a bit an added more fuel. i'd like to think i can crank a 13.1 or faster when i get the 3.42s in it. still on stock untouched 081 heads and TPI.

 

well I had Drag radials on it, but I am an idiot and cant launch properly. I either did a good burnout and bogged the motor by dumpin the clutch, or I did not do a good enough burnout, slipped the clutch hard and spun the tires, hence the geriatric 2.1 60ft. I was suprised that this thing will really cook the 275/50/15 DRs even when they are aired down unless they are good and warm. I only got 4 runs so I am confident with a few more runs I would have gotten it dialed.

TunedPort335 I am amazed at your untouched heads. I suppose some of your power is a result of the extra cubes but dang there are guys with aluminum L98 heads on 350s that cant run your times. Oh well I suppose there are also people that dont believe that i am still runnin the stock chip.

BTW, didnt mw66nova run like a 12.95 a while ago? He has since hurt the engine however....

 

Where can I get me a set of aluminum vette heads and what year will fit my 86 tpi 305?!?!? Dang man, if 13's are that easy, I'm all about modding my 305 a little.

 

you dont need vette aluminum heads to do 13s. All you need is bolt on LB9 5-spd car or a bolt on auto lb9 with a converter and a cam asumming you can get good traction. I dont imagine that 2.73 gears help much either.

 

PneumaticTire: The heads you speak of are found on 87-92 corvettes, they #113 casting Aluminum heads. These heads are also known as ZZ4 heads, you can buy them brand new still.

Vette heads are not required to go in the 13s, I just did not want to port my iron heads. As Smurfin stated it is reasonably easy to get an LB9 5speed car in the high 13s with bolt ons. Automatics will have more difficulty getting there without gears and a converter. For some reason my car only ever trapped 96.5mph with the automatic, now it has ran 100.5mph with the only changes being an Edelbrock cat back and the 5 speed trans. Getting deeper into the 13s takes a bit more work than just bolt ons in most cases. TunedPort335 has stock heads but he has more cubes. mw66nova has converter, gears, ported heads i believe, and his car is light.

 

- time for some suspension work...My stick car is cutting 1.67 60's on 315/35/17 Nitto DR's. I do have a big stereo system in the trunk though, so that helps w/ over hang weight...

later, justin...

 

wait a minute... why is it i ran 14.481 at 101.46... does that mean im getting no traction whatsoever?

 

Yeah, if you have a TPI car and are trapping at 101 mph you should be in the mid 13's at least. More like low 13s.

 

well that makes me feel a lot better!

 

Your trap speed is pretty good, my LT1 when I first bought it was trapping at 100 or 101 mph. I was running 13.80s/13.90s in stock trim. So you should at least be in that territory. Generally TPI cars get up to speed very quick, but only have 305 cu in's to feed with that intake you may have more linear power delivery above 4000 rpm. So you might not run the same ET as a 350 car trapping at the same speed but you should definately be in the 13s.

 

Knock another 10th off that short time and you will pick up 2 10ths in the big end. That would net you a 13.5 Not too shabby for a little 305.

 

Damn our Et and MPH are almost exact...
13.7-8 @99.5-100.5 mph 2.05 60' average

stick, Ported stock heads, 2030 CompuCam, Edelbrock shorties 2 3/4" ex, all free mods, March pullys 255whhp 352ft-lbs torque

Going to port stock Base to Accel runners and see the difference.

 

Great times and I'm hoping to improve on my 13.909 tonight at Cecil County with my auto 305 TPI

 

Dang thats wierd. with my automatic my car made 230 whp and 280 wtq.

 

not stock it didnt

 

No it made that power in May before the automatic took a crap.

 

cool, thats what I figured, the way I read it was it did it stock...I was like ummm no...

I've been looking pretty hard to find one of these cars so far no luck but I anticipate a long search