I just bought a '89 WS6 with a TPI 305, T5, 3.73 Posi, Flowmaster Catback, and Hurst shifter. I figure as the car is right now it will be like a mid-high 14 second car??? I'm not sure but thats my guess anyways. I want to run around a 13.7 or so in it without doing too much major stuff. What needs to be done to run this speed? I was thinking of doing ud pulleys, a chip, headers, bigger tb, larger plenum, larger runners, and 1.6 roller rockers. Would this get me close to my goal? If so, where can I get all these parts at? I don't want to go changing the cam yet if I can avoid it as I have plans to eventually make it a turbo car so then my cam needs would change and whatnot, but thats pretty far off in the future so for now I at least want to make it run a little better.

Anyways, I appreciate any input.

Thanks,

Shawn

 

13.7 is your goal huh? LOL well you will be pleased to look at my sig then. I think my car has a 13.50 in it but i am not good at launching it yet.

 

I've seen your sig, but like I said I don't want to do a cam just yet and I definately don't want to do heads. Thats why I was asking if the mods I was thinking about would get me there. And where can I get the mods. Other than like summit or jegs I have no idea where to order parts for these cars.

Also, I am usually pretty good at launching cars, I don't know what it is but I just get used to cars fast and can cut good 60's. My buddy was cutting 2.2-2.3 60's in his '94 Mustang and I jumped in the car and after 3 passes I was down to 1.9's... I'm thinking I won't have any problem getting 1.9 60's with the car with a little practice. I cut 2.0's in my GP if the track has any prep at all and that car is way harder to launch than an f-body. So I'm planning on being able to cut AT LEAST 2.0 60's with no problem.

Shawn

 

dbtk2,
This'll get you to your goal:
a higher stall convertor (2800)
Headers
port plenum,
shift kit
1.6 roller rockers
good tires or slicks

I would not change the cam unless you are putting on better heads.

I am sure Summit or Jegs would supply all these parts, look on their site.

 

Its a T5 car, so no convertor or shift kit for me. I also want to do it in complete street trim so probably no slicks, but I will be looking into some nice street tires. But basically you are agreeing with me that what I listed above (ud pulleys, a chip, headers, bigger tb, larger plenum, larger runners, and 1.6 roller rockers) will get me to my goal?

Shawn

 

A 13.7 with a bolt on 305 tpi is wishful thinking. I think your going to need full bolt ons, along with a better cam. I am not saying its not possible though anything can happen.

 

1MeanZ's car looks to be running normal times for the engine and the mods. I do think a 13.5 would be possible in good conditions, with a good launch.


dbtk2- I think you will have to dig a little deeper than you want to get 13.7's.

 

just kinda FYI.

you may or may not recall "project blue thunder" that gm high ttech did. they got the 305 into the 13s without no2. you may want to review the article for ideas.

just go to gmhightech.com and do a search and you can print the articles out. they did about 2 or 4 if i recall correctly.

good luck!!

 

They did not use nos but they did the heads and the cam.

 

89IrocZ350TPI you took the words right out of my mouth.

I dont think anyone has ever gone faster than low 14s in with a stock heads and cam LB9, 5speed or not. The fastest stock 5speed I have ever heard of ran a 14.4. I highly doubt you will go below 14.1 with rockers, ported intake, and exhaust, and that is assuming your car is already in the mid 14s! Most stock early 5 speed cars are about 14.70, so good luck dropping .8 sec with rockers and exhaust. You just gotta dig into the motor if you want to go that fast.

And yes Project blue thunder went 14.70 stock, and they did cam, heads, aftermarket intake, headers and exhaust, and I think it went high 13s then before it blew up.

 

See sig for running under 14's witha stock bottom end 305.You will need to upgrade the peanut cam

 

n20

 

Your best bet would be to pull the top-end of the motor and do some porting. Bowl blend $ gasket match the heads and put in a decent cam. (Competition Products has 3 different hyd rollers for $150, 2 of which would be in your range). As for the intake, gasket match the base and smooth the entry from the runners, and port the plenum(do a search, many have done it). Headers are a must, runners would be a plus. Past that, look into suspension. Subframes, Lower control arms, and a torque arm. You should be able to see 1.9 60' stock, but getting to 1.7's would really help you attain your goal. - A 305 can do it. The only differnece is bore, and I've seen plenty of 305's that could easily be mistaken for 350's. W/ these mods you'll be seeing 13.5-13.7. Even if/when you go turbo, most of this can be used over, the pieces you don't use you can sell for more than enough to offset what you got out of them in use.

p.s. - get a new set of valve springs while your at it. - CP has the Z28/LT1 .510 lift springs for around $35 w/ spings, retainers, and locks...

 

that'd work too...

 

I believe you can reach your goals with your list of mods. When my car was a 5 speed i ran 14.23@ 96mph with a 2.07 60ft. The only mods on the car at the time were edelbrock headers and a dynomax catback. You can make a 305 run (check sig below) it just takes a little time.

 

to do high 13's your gonna need 95-96mp traps. thats stock L98 power. so your gonna need to up the ponies a few and raise the torque alot.

its very doable with full bolt ons

i'd do all of that, long tube headers if possible, a great flowing catback exhaust/true dual setup, aftermarket base. the 48 mm stock throttle body should be more than enough on a 305. use that money on a base. portmatch it all. get a adjustable fuel pressure regulator and crank it up. try 46-50psi and see what works best. 1.6 rockers is a must if your gonna hit high 13's.
i think your car has the L98 cam already since its a stick car so thats a added bonus

also if you can, ditch some stuff..save some weight.. AC/smog/air... all that can go and save weight if you can afford to lose it. get a fiberglass hood maybe.

since its a stick car, your gonna be well on your way to possible 13's if you can drive. throw on a set of slicks and launch the hell outta that thing and hope the 10bolt will hold. i think it will.

you cut 1.7 60 foots on slicks and bang those gears, your gonna see good ET's.

 

chikn305 - that's one movin' 305. - what's your 60? I went high 11's all motor w/ a 1.66 60'...also, what tires?

 

Shagwell............YOU BEAST!! 11s!!! OUTSTANDING!!!

Shaged a few LS1s have we?

also, please not that the mention of the blue thunder article was for reference and to GET IDEAS.

 

My 60's were in the mid to low 1.50's with a best if 1.53. All those were on 275/60/15 M/T et radials.

 

Dont forget your air intake set up. SLP makes a nice aftermarket set up for Pontiacs. Get rid of that coffee can on the side of your car.

 

an 89 could have the same intake as the SLP set-up stock. basically anyway(same ducting, different air box)

 

I love the look of"mommy, you didn't buy me a fast enough car...and...I thought those were slow..." - Most people don't seem to expect a 3rd gen to be fast... - I hope M/T releases a 315/35/17...that'd be great.

 

Ya third gens need an aftermarket hood + exhaust to look and sound fast. Then again it does say 5.7 L on the back of the L98 cars which draws attention to some.

 

I've got a Ram Air hood, long tubes, x-pipe and true duals w/ maxflow(straight thru) mufflers...not hiding much here...

 

I like my hood on my car. And if you look at the TPI horse power rating for 1987. 5.0L with 210hp. The 5.7L with 215hp. Not a whole lot of difference. The biggest thing like everyone is saying is headers and a nice exhaust. Thats #1.

 

LOL "straight thru"

you would think they could HEAR you coming

i know i have embarrased MANY cars since the 350 went in. the outside is completely stock, even the wheels. (just a little fatter with the 255s)

the best feeling (besides whoppin the SS ls1) was pulling an 04 cobra until they missed 2nd and disappeared in my rear view.

don't know if i could have kept pulling but it was fun while it lasted. never forget hearing that blower whine in my window.

keep up the good work

 

Yeah, I figured the 5 speed is definately a major advantage to my setup. IMO I am pretty good at driving. I want to try to do it on street tires just because I think it would be cool to do, but I will probably eventually end up getting some slicks, might as well take advantage of the 3.73's and Auburn gear.

The car is pretty damn loaded (leather, t-tops, power everything, etc...) so weight is a big problem. I will look into seeing what I can gut on the car but I'm not removing the a/c.

I was reading some stuff on the fpr and I think I will probably put one of them on and raise it up a few psi. I definately want to do the 1.6 rockers, chip, and headers.

I appreciate all of the input so far. I know it won't be the easiest thing to do to run 13's without changing cam/heads, but I think it can be done with a little work, and some good launching.

Whats the best chip to get for a setup like this and where can get one? I don't even know where to start.

Shawn

 

Would most people accept that a 97-98mph 1/4 mile car with a 1.8ish 60' would turn high high 13s?

If so, My bolt on LB9 T5 Z could be there this next season pending some chip tuning and practice lauching the nittos I have. I really dont think my thinking is way too wishfull But I am not planning on 13.7 either.

 

Whats the best chip to get for a setup like this and where can get one? I don't even know where to start.

Shawn [/B][/QUOTE]

Shawn I have a tpis chip that I used in my car whem i had the mods you're looking to do. Pm me and we can discuss a price

 

TPIS makes a pretty good chip.

 

do a search. you may want to learn how to burn them yourself.

there is also i guy on ebay who does custom chips. i have been talking with him but have not let him do one yet. not becasue of him but because i am not ready yet. (ebay search under TPI)

he will send you a lap top to download info if you will pay him a deposit or you can tell him what you have and he will give you his best from what you provide.

he sounded pretty knowledgeable and has owned TPI cars before and is building an engine for his 91 z now.

hope this helps and let us know how it turns out!!

 

I got one of those "custom chips" at a cost of $400.Friend of mine who used to mod this board burned me one that put the custom chip to shame.What a waste of $400.

 

Whats the difference between the two?

 

don't think we are talking about the same guy. this guy advertises $120 for a custom chip.

i also am not happy with the one some burned for me for $350 that's why i need a new one!!!

 

350$ !!?? you could be burning your own for that

 

I would burn my own if I knew how.

 

- time to hit that good ole "search" key guys. DIY prom tuning is much better than mail order. - Aftermarket ECU's maybe better still...the MS system is the less tahn some of the "custom" chips you guys have quoted n here.

 

agreed. when i bought mine was right after i put the engine in and didn't know any better.

having said that, if this guy will send me a laptop, take the info, and then burn a chip for $120 from the lap top info how much better would burning my own be?

 

How many times will you send the lap top back and forth? I find it hard to believe this guy can get a tune dead on every time with only one data log. I myself am just getting into this DIY prom stuff, but it is my understanding that it takes many revisions testings and datalogs to get it right.

 

When my car was a 305 I was able to run 13.85 at 100 MPH with bolt on's. I had the stock cam, heads, runners, and 3.45 gears. I also had all of the bolt on mods that are listed in my sig. It is possibel to run 13's with bolt on's but the 13.85 was the best run I had out of 100's of runs. On most days it ran low 14's.

The 305 dynoed at 237 RWHP and 327 RWTQ when it ran the 13.85.

 

Wow those are awesome times. Thats pretty close to what my 350 makes.

 

bj.............

WOW! one thing fer shure, you know how to get the most out of a tpi. simply amazing. i would hate to even think what you could get out of an ls1 or ls7.

got a 305 to turn 13s and a 350 to go mid 12s. VERY NICE!
teach us master!!!

 

I do want to learn how to burn them myself since there is pretty much no aftermarket for my GP at all and with all the stuff I've done to it my chip is way off. I just haven't sat down and figured out everything I need to get to be able to burn my own. Eventually I will be burning my own chips, for now I just want to start with a basic aftermarket chip and then once I have the ability to burn my own, I'll expand from that chip.

Thats good to know. What was the 60' for this run, and what was the weight of the car?

Shawn

 

The 60 ft was a 1.90 with street tires (perfect launch), the weight was 3575 with my 200 LBS in the car.

 

Stupid stuff to try if you havent is kn filters and a air foil for a nice cheap 10hp. Dont stop at headers and do the catback also (when done right youll get alomost 30extra hp out of that 305. Change the intake manifold and port the runners and plen for still some more. Throttle body will help a lot also.
Im currently running mid 14s with basically the above and a 277 rear so your rear end should make up the rest easy.

 

You really dont need a different throttle body until you start diging into the motor.

 

What kind & size street tires were they and did you have any suspension mods. I'm hoping to be able to pull off 1.9's pretty easily and I would like to dip into the 1.8's or maybe quicker on the street tires. I can cut 1.9's in my FWD GP on street tires (it is a very perfect launch though but thats an open diff, automatic, ~3700lb. car(with me in it)) so I would think a car that is lighter, with RWD & posi with wider tires should do that easily... (with some practice) I'll just have to see.

The car has only what I listed above, nothing else. So I haven't tried anything. I didn't want to waste any time/money on anything before I knew if it was going to do anything or not. I already have a flowmaster catback (listed in the first post & my sig) but I don't know if its not good enough since everyone is saying get a catback?

It also looks like most are saying not to get the throttle body yet, and since they are a bit expensive, I'll probably stay away from that for now and maybe get one later if I do more. We'll see. I want to get a baseline dyno run (I'll probably make ~4 pulls) and 1/4 mile pass (however many it takes for me to feel that I'm driving it to its potential). Then I'll start doing everything to it and we'll see where I end up.

Thanks for all the suggestions so far.

Shawn

 

well for me, i cut around 1.88-1.93 60's and i think i have more in it with more seat time.

i run stock 89 iroc wheels with Fulda Carat Extremo tires.... 245/50/ZR16's. they are a soft street tire. i love them. granted they are the only tire i ever ran on the car, but for 100 bucks a piece, you cant beat them. tread wear rating is like 180 and i get about 12-14K miles outta them normal driving. which is fine for me as the car see's less than 5K a year now.
they handle on rails and hook good at the strip. and i'm 2800 stall auto with LCA's and brackets at middle hole so parrell with ground, and a panhard bar. i got prokit springs and adjustable tokico shocks which are awesome. i cut 1.88 so far with a bad torque arm mount and a exhaust leak on a hot day. i even walked it outta the hole just abit before going WOT. never slipped a tire.

 

hey, Orr89RocZ, where did you get those fuldas? I have some on the front of my car and I wanted to see where I could get some more.

 

I wouldnt count on launching a t5 LB9 being even half as easy as launching and AUTOMATIC FWD car. All the wieght is up front on the drive wheels making traction much easier. I have a bear of a time trying to launch my T5 LB9. I need ALOT more practice