Hey

I just want to know what kinda mods u 305 TPI guys have and how they worked out for you.

Thanks

 

I modded my old 305 with an L98 cam, WP 305 Torquer heads, Edelbrock headers, etc. Couldn't get better than 14.9 in the 1/4 mile and got tired of getting my azz kicked...

Then I gave up and modded it with a replacement 350, sold the 305 to some guy who just needed to replace his current 305 and we were both happy.

 

my 305 auto with peanut cam and 2.73's has done a best of 14.9@90mph with 2.0 60' on street tires. my only mods are SLP 1 3/4 headers, SLP cat back, hypertech chip and free mods.

 

I on the other hand have had great luck with modding my 305. I've droped a full second of the stock time. With the stall and 3.73s that are do to be install here shortly I'll beat over 80% of the 350 cars on this board. There are guys running even better than me right now with 305's. Dont give in to the hole get rid of the 305 get a 350 cry that seems to be the main mod for as 305 around here. Take your time do your home work and amake the 350 guys cry as you post better times than they do. The only thing I'll say is if you spend the money on a 305 the amount of cash on a 350 will pay way more in the end. Thus the only mods short of the LT1 cam I have will transfer to the new motor (383), mainly gears, stall, and suppention mods. But, I'm going to run 13's in a 305 before the new motor goes in. Why would I put 8.2:1 comprestion on my new motor?

 

15.4 @90 stock, w/muffler, air filter, 5spd 3.45 gear 3600lb w/ driver '89 MAF car 77K miles

15.1 @ 93 w/ edelbrock headers $320

14.6 @96 w/ SLP chip and homemade cold air 96K miles

14.3@96.8(different track(slower/higher) cam/1.6RR, siamesed base, underdrive pullies, AFPR, 3" exhaust and no tuning 108K miles

I feel 14.0/high 13s @99+ will come with a custom chip and a run at the same track as 14.6 run.

Best mods are exhaust(headers/3") and chip. The cam wants a differet intake and definately wants a custom chip BLMs range from 120s to 150s at different rpms

The cam did give the car a new attitude pulls hard to 5500 rev limited and runs fastest shifting at 5500(as high as the SLP chip allows)

 

look at my sig. for my mods & my best time with street tires,
a 2.4 60 ft., & a reaction time of .9

 

Yup, I see a lot of 305 owners talking in the future tense...my car <i> will </i> be fast, etc...but they don't seem to follow up with results.

Speaking on behalf of the other 20% of the 350s here, good luck to ya.

 

Thing is I have the stuff and as is take quite a few of the 350's all ready. I have followed everything I've done with track times. But, you do agree that MOST (not all) of the L98 cars are stuck at best in the 13.8 range with mods. Why do you ask, putting the power to the ground. Go fast motor and no chassie or suspention work.

 

EXACTLY! You have to get your 60 ft times down to 1.6-1.8 in street trim. The guys out here don't know what hit them when they get a "OK" looking monte carlo SS next to them with a little bit of rumble(most think i have a modded carbed 305!) Good suspension tuning keeps the RPMs lower and where TPI wants to be. It is a trip to hole shot people by a length or 2.

 

as for the only go fast engine mod...k&n filter in which i didnt feel a difference in. I say I'm in the neighborhood of 14.1-14.2.

 

My mods and times are in my sig.

 

YEah Yeah, everyone builds a 350, 355, 383 and 400sb. Bla Bla 305s are crap get a 350.

SHUT DA HELL UP

LEt me state this, if you are pissing money in the wrong places you will never make your 305 go anywhere. I watched a friend spend 8000 on his LO3 TBI 305 now that was a waste his best time was 14.6

LO3, agreed its a POS and not great.

LB9 305 TPI, yes its worth it. Why?

Because 305's are great at producing torque... look at the figures..

I'm running 14.6 with a stock engine, only mods are in my sig. I have not installed the cam or the headers. As my car was recently smashed.

What got me to 14.6? Rebuilt motor, ported heads, shift kit, bigger gears, d/r's, upgraded my ignition, 3inch exhuast and cold air intake.

Car is suppose to run low to mid 15s stock, so I here from all you around here.

Alright now, better heads that are ported, SLP runners, cold air, 58mm throttle body, a new cam, full exhuast headers and 3 inch all the way back high flow or no cats, good ingintion, some drag radials, a few supsension compents and you could start seeing mid 13s.

Don't doubt it. It is possible, but I have seen to many people pee their money in all the wrong places making the monster the wrong way.

Want to see a 305 that can hang with an ls1? Ask willie over on the power adder board.

I think i can reach my goal of low 13s high 12s for under 4000$ and still have my cars orginal 305tpi.

But yes i know for 4000 I could buy a crate 400hp motor from GM. whatever its been over done in my opinion. Besides my motor was rebuilt, blueprinted, forged internals... Its ****ing new with only 35000 some miles

Don't doubt a 305, doubt the person who mods the car...

MY .02 cents

 

Best upgrades for your 305 as seen by looking at peoples sigs on this board with 305s running below 14secs...

HEADS & CAM, heads are prolly the most benficial upgrade for the 305.

 

pennylessz28
The 58mm throttle body is way to big for a 305.


I can tell you that the 305’s do not put out the torque that the 350’s do.
With just an MSD 6al, airfoil, Hotchkis suspension and drag radials on the Z I went 13.851. There is no way that the B4C that I have would run that fast, might have got it to run 14.3 but it would not have gone into the 13 with the same mods that the Z has. The Z has 350, 3.23 gears, auto and the B4C has 305, 3.43 gears, 5-speed.


I am still working on the motor right now and hope to have it running in the next 2 months. It's the 305 out of the B4C.
This is what I am doing.
Bored it out .020, honed with hone plate, decked the block and line honed the mains and balanced the rotating assembly.
*Edelbrock headers, SLP runners, World Torquer heads + porting, porting the intake, *Flow Master cat back, Accel injectors and Comp Cams XR 264HR-12 cam + some other odds and ends. I do not know what it will run but I will post after I get it broke in and tune the chip for it.
*= Already on the car when I got it.

 

I know Willie personally, have seen his car , seen him run, and he is an excellent example of what a 305 is capable of. 12's

Another great example is Tim from the electronics board, He also owns a 12 second 305 TPI , I also know him personally hehe.

they are my inspiration.

 

I do have to remember that my engine is bored and honed .20 over with new internals from the previous owner, so I am sure that has helped my 305 some.

 

Great, so when you lose big-time at the strip you can tell them how fast Willie's car is and they'll bow in awe.

 

Hahaha

(had to)

 

did I say that you F'ing *****....

I dont need to say anything to anyone when I race. I've beat everyone I have raced so far EXCEPT, one of my friends. wich would be 20-21 races total at the track & a few street races.

get to know who I am before you accuse me moron.

 

I know you


Can I accuse you?

 

you can acuse me anytime roc . were on the same wavelength

 

Well, I'm about to begin working on a 383, but in the mean time I do have a fast 305 (that hasn't been to the track in ages). I have an 89 GTA (which means the 305 is a G92, 5 spd, etc) with SLP 1 3/4 shorties, 3" flomaster exhaust, Accel 300+ignition, some suspension work, and a few other things.
Nothin special, but I'm sure it's high 12's or low 13's.

Oh yeah, and I forgot about the ATI procharger

Jon

 

I didn't accuse you of anything, I accused your 305 of being slow, which according to your sig it is. Referencing other cars with faster 305s doesn't make yours faster.

Now go take your Ritalin.

 

riddlin