let's say i can ever get this RS running...then i get a chance to swap out the tbi stuff for my tpi stuff...with maybe a $300-400 budget, what could i do to get it in the 13's?

it's a 1991 RS 305 5-spd., so it's a roller motor and all that good stuff...i have headers to get ceramic coated and put on (so it's not included in my budget).

if it's possible...i'd like to stay away from heads/cam stuff, just because i dont know that my dad would let me lol.

im about to start cleaning up the tpi stuff so i can port/polish and whatnot.

and one more thing...i can't remember if the heads/cams are different between 305 tbi and 305 tpi.

and if eprom/memcal tuning is gonna be a big part of this, i can do some of that myself (i hope, i havent messed witht he tpi stuff yet, just some tbi)

thanks,
mike

 

stock heads and cam 305 in the 13's?

nitrous is a bolt-on isn't it?

350tpi cars with bolt-ons in the 13's are rather rare and it'd certainly be significantly tougher with less cubes, close to impossible without at least a small cam upgrade

 

It is possible. Just choose the right combo for parts and it is accessable.

 

slim chance that you will hit 13s with that stuff!! you might get into the 14s

 

dump a 200 shot of nitrous on it and pray it holds and you may see 13's lol!

 

well...how bout them 14's then? lol.

i may be able to do a cam upgrade, not sure about heads tho (unless the heads for a tpi are different than for tbi-they arent tho are they?)
-and which cam would be a good one to choose. i see that a lot of people use a ZZ9 or an LT1/LT4 cam, but those are on the 350's. are they good for a 305 too?

i think i may just look at getting a stock cam if i can (just talked to my dad and for some reason he's gettin all mad because im talkin about puttin in another cam and how much of a paine tuning the chip for that will be and blah blah blah)...
haha some of yall might actually know who my dad is on here....
ZSRBEST

anyway...thanks,
mike

 

I think every 350TPI with the /right/ bolt ons should be in the high 13's. But to do this I'm considering a good 2800 stall a "bolt-on" and would definitely be a big help.

Back to topic I think it is possible, BUT your going to need to ditch the cam.

-ZZ4 Cam ($130 Ebay)
-LB9 heads - DIY port ($50 bucks for heads ~$100-200 for porting stuff)
-TPI setup $150-200 if you look around.

You already have the headers. Instead of coating them spend that money on a nice 2800 stall. Throw your rear end in the toilet and get one with a (disk prefered) 3.23 or higher and posi. Then you ought to be low 14's if your lucky you might get into the 13's???????

Oh, and learn to Tune your 730 ECM . That my friend, is where your power will ultimately lie...

 

he said he had a 5 speed...

 

OOPS, lol. Missed that one. OK use that money for gears... .

EDIT: I hate to throw the 350 arguement back into spin but that may be your best option due to the fact you don' thave an LB9 but the L03.

I was in the same boat as you and you know what, for $175 I picked up a 100k L98 Long Block. Add a TPI setup to that for the price mentioned above and do the gears and you will probably be in the 13's. With the money you have to spend, and the times you want to go - I believe that route would be the most "COST EFFECTIVE". (And I'm not jumping on the 305 guys here)...

 

My first original TPI 305 dipped into a 13.99.9 only once. In good air, with good traction. Normally the car ran in the 14.20 area. I say this as it too was a T-5 stick. It can be done! My 92 305 had bone stock heads. I just had everything else done except the heads, everything. By no means did this make my car a legit 13 sec. car. Just thought Id mention it can be done. Not easy, but nothing ever is.

 

just to clarify what i have already...(but not on/in the car lol)
-headers
-3.23 posi rear
-all the tpi/ecu stuff i need
-and tuning programs/prom burner (although i've never 'tuned' yet...just turned off vats and stuff lol)

 

my 91 z28 w/ only bolt ons ran a 13.7 a memphis motor sports part just about a month ago on street tires w/ a 1.9 60 ft. at 99 1/2 mph. 305 shouldnt be that far behind.
my list of mods were, accel superram intake, slp runners, port matched plenum, stock tb w. airfoil tpis, accel disty, and coil, ac delco rapid fire plugs, morosso 8.5 mm wires. k&n filters, shorty headers w/ y pipe ( hedman). 3 inch to flowmasters, stock stall n 700r4, 3.23 posi rear . car weighed 3630 w/ me in it. manually shifted the 700 at 6200 rpms and yes thats on the stock long block heads cam pistons rods N crank !

 

That makes a huge difference over the stock TPI intake though.

blackiroc - i dont know how deep you want to get into this but you could shave weight by removing the AC, EGR, and A.I.R.

It gets hot here in texas, so i kept my AC, but i got rid of the A.I.R. when I did the headers, and the EGR weights something like 30lbs (so im told.) Combine that with the weight of the AC (50lbs??) and A.I.R (less than 15lbs) and thats almost .1 second. Also your gonna get a little improvement with a shorter belt. Just something to think about i guess...but dont forget, removing EGR and AIR is illegal...

 

entirely possible. my 305tpi 5spd car hit 13.9 @ 97 with a mediocre 2.0 60ft. mods included, headers, off road y, catback, free mods, and a little weight reduction.

stock heads, stock cam, stock 3.08 gears.

to bad i didnt get to tune it, there was a decent amount of power to gain. with a bad maf it trapped 100mph because it richend the hell out of it which it needed badly.

 

your tbi heads are going to hold you back big time. the swirl port design creates decent low end torque, but don't flow for crap up high. you'll need to go to an 081 casting heads which were found on factory tpi 305 motors.

 

Maybe in Denver. My 350 TPI did 13.89 with headers and exhaust. Stock intake/longblock all the way back to the rear gears.

There've been a few 305's in the 13's around here, but they all had cams (and carbs.) I'd say with a cam (not a wild one, TPI doesn't flow up high) and some chip tuning you could easily get into the 13's.