This is my first TPI car, so...
Ya think gears, exhaust, AFPR, dyno tune, and drag radials will get me high 13's? Then what about a 100shot of some go-go-juice

The car only has 39K miles on it, so its not worn out at all. Id like to be able to say "its only a 305" then run a high 13 on motor, or low 13 on spray. Possible?

 

It is not easy to get a 305 into the 13's. My 350 with the list of mods below ran a best of 13.7@98. So you are not going to get into the 13's with bolt ons. To get into the 13's you will need lots of bolt ons,and then you will have to dig into the motor such as heads and a cam.


1989 Chevy Iroc-Z350TPI 51K orginal miles.
FlowMaster Cat-Back w/high flow cats from Cat-co
EdelBrock TES Headers
EdelBrock High Flow TPI Intake Manifold
EdelBrock High Flow Intake Runners
EdelBrock Air Foil In Throttle Body
Throttle Body Bypass
TPI Intake Manifold and Runners Ported by TPIS
TPI Plenum Ported
TPIS Adjustable Fuel Pressure Regulator
TPIS- ECM Reprogrammable Chip
K&N Intake System
K&N High Flow Air Filter
ACSD 82-92 Camaro IROC Turbo Hood
HyperTech Chip Stage One
HyperTech 160 Degree Thermostat
Re-mapped Injectors
MSN Ignition, Blaster Coil
Accel High Performance Rotor,Wires
Beefed up Alternator
Mass Air Flow Sensor [cut out fins]
ARP Engine Fastener Kit
GM Special Order Crome Valve Covers
Synthetic Motor Oil [every 3 months]
3.42 Rear End
245/50/16 Series Tires w/Iroc-Z Rims

Other Mods
Viper Alarm System
Pioneer Radio w/DEI 4/6’s & 6/9’s
Kenwood Amp
Cregar Rear Louver
Chevy Race Style Floor Mats

 

Motor

 

I know of alot of L98's in the 13's with what you have, some with not even as much. Gears, exhaust, AFPR, dyno tune, and drag radials should probably put me at what them, low-mid 14's? Then of course 13's will be easy if I use nitrous. Im gonna get some tracks of the car in a couple weeks, Im expecting it between 14.9-15.2 The lo3 Camaro I had went 15.8, and this T/A definetly feels faster.

 

my 305 tpi with ported and polished heads, cam, k&ns 255/16 goodyear eagle tires and 110 shot ran 15.584 with a ****ty 2.348 60' on the motor and 14.481 with a ****ty 2.413 60' on the spray

 

weight reduction! get creative so it doesn't take away from the overall streetability of the car. my car has full interior and sub and weighs 3260 with my 250lbs butt in there. mine is carbed, but my 305 has gone 13.08 @ 102.74mph on motor alone. get full exhaust(hooker 2055's with !cat and 3+" catback of choice), stall converter(2500-3000), gears(3.73:1), and sticky tires(m/t has a really nice Drag Radial they just recently came out with). that will get you REALLY close.

 

SLP IROC-Z ran a 13.9 @ 97 with free mods and weight reduction. Untouched motor, T5 tranny, and 3.08 rearend. Its not that hard to do with a 5 speed car. Automatic is a different story though since they came with the tiny cams

 

http://gmhightechperformance.com/tech/0403htp_chip/


Maybe this will help. It shows what it takes to get a 305TPI Trans Am into the high 13's

 

Now just what is there to remove for weight reduction? Id need to shed like 100 pounds just for a tenth of a second. And I have a set of M/T ET Street P275 Drag Radials. After I sell my Camaro I think I'll buy a nitrous kit to finish the job.

 

13's in a 305:

3.42 gears
Shift Kit
2800 Stall
SLP Runners
Drag Radials
Hooker 2055
Catco Cat
Hooker Catback
AFPR
Prom

 

fiberglass hood, ac delete, complete smog equipment delete, drum brake rearend with aluminum drums, take your sound deadening material out, go to manual seats (fourtgens if you can swing it, even lighterweight!), drag wheels front and back (ie draglites/prostars, ect.)

 

I guess there is a huge difference between the '85 having the small cam in it and my '88 5 speed car that got the L98 cam.

With 188,000 miles on an untouched longblock and just some free mods (No cat, chambered muffler, cut out airboxes, gasket matched lower intake, siamesed runners, cleaned up pleunum, and 10* initital timing) on drag radials I ran a 15.11 @ 92.12 with a 2.21 60'.

This is with 3.08 gears, car is a hardtop with AC and power everything, wieghs 3460 with me in it and nearly full gas tank.

I'm sure some headers, gears and aftermaket runners might put it in the mid to low 14's but it'd need some head work and a bigger cam to hit 13's without gutting the car.

Or I may just piece a "kit" together and try it anyway.

 

mw66nova u have a 310 LOL

first a good running late model l98 should run high 13's with a converter and full exhaust/air box mod. mines there with 2.77 gears and street tires on factory rims. gettin some new times this weekend with teh 3.27's


a late 305 is rated at 210hp/285 torque. you need to bump those numbers up a bit. a better cam would help. the manual 305's with the G92 option got the L98 cam and made 230/300. those numbers are good for mid 14's driven right.

so with that said, ur gonna need a converter, probly 2800stall. gears, drag radials, some bolt on TPI mods, full exhaust-header back with high flowing muffler, AFPR, and a tune would help. that should do bottom 14's and if ur lucky, i see a high 13 second run.

if that doesnt do it, step up to a mild cam like a L98 cam or something just abit bigger, something with 210 degrees duration and .470 lift. that should gain another 20rwhp-30rwhp easy and get u high 13's fairly consistantly.

a manual trans would help too to cut down on power lost thru the drivetrain, but thats not a big deal. the auto will get it done

 

does having 5extra cubes all of a sudden make my motor magical? LOL! musta shaved off .6 of a second with those extra cubes, eh?

 

My car without nitrous runs a 14.2

With the juice, my car runs the 1/4 at about13.5-13.6

Look at my mods

With a 2800 stall, I would be in the 13's with no juice

 

Im not gonna bother caming a 305. I can build a 383 or 400 for it over the next year. 2800stall seems high, but I dont know much about the LB9. Where dose its powerband start? And what should a stock one shift at? Mine is shifting in Drive at 5200rpm, in the red. Should I try reseting the TV cable? Or do I need to put a different servo in?

 

The cam I did as a 1st mod. Seems stupid, but I got the mechanic to do the intake gasket and while he was down there, he did it.

My power band starts about 2500 and shuts down at 5000.
Mine shifts at 5000, that is stock.

I wouldn't change the shift and the servo doesn't change the rpm shift change, the springs do.

The only reason why I am doing a 305 up in the 1st place is b/c I didn't have money when I started so I did the little bits.
But now, I am going till it blows and then biulding a 383 and moving the parts over.
Should be anytime soon the way I am going!!

 

Closest I came with my LB9 was a 14.30 w/ a 1.79 60ft. on street tires

'88 T/A WS6 (heavy, and I ran it WITH the swaybar)
CAI
TES
Gutted Cat
AFPR
Comp 1.6 rr's
Timing advance
MSD Coil
Airfoil
SLP runners
2800 stall
3.42's
SFC's

 

the 85 TPI didnt come with the peanut cam, and even if it did i already changed out the stock cam

 

WOW a 1.79 on street tires?

i'm at 1.88's and hope to get abit more... but know alot of guys in the 1.8's on drag radials.... thats a great 60 foot

 

my car 91 b4c 350 tpi ran a best of 13.89 1.98 60 foot timewith airfoil, collant bypass, and msd with 165,000 miles on origional drivetrain

14.00 with stock stuff

 

Since Ohio decided to start having its normal weather again , I havent gotten to the track yet. Hopefully this weekend. But last night I raced my friend in his Camaro. He went 14.3 on a hot and humid day. It was like 50* last night and we went from a 45mph pull. I pulled on him first, then he caught up, then we were side by side, dead even clear up 95mph. Then I went half throttle to let it shift into overdrive, then eased back to full throttle and it downshifted back into 3rd, so I let off then. He'd take me by 2 car lenghts from a stop though. So I think my lil 305 is runnin good. Mabey I will get that 14.99 with this nice cool weather.

 

I got a new best of 13.5 at 99. Stock the 89350 does 14.5's I believe if tuned properly.

 

Think it was a timing error, or luck lol. Happened once, every other 19 out or 20 runs was a 1.83 on the money.

 

13s are not too hard in a 305. I should go 13.6-13.7 with my slicks and 5speed. see the sig.

 

Sure, not with P&P heads and a big cam. Try it bolt on with street tires.

 

So far the weather channel says clear Friday night. That means Ill get it to the track. But its Ohio, so the forecast could change 10 times in 9 minutes...

 

So Im sitting in the staging lanes, waitin for Test&Tune to start running, but there are soo many cars thats its taking forever, then I get the phone call that 2 private planes had a mid-air collision in the area, me and my ground search&rescue team get out to it just to end up gaurding a plane engine sitting in some guys lawn all night. I left before I even got one run in, so I dont think Ill be getting a timeslip this year

 

heh, capitol raceway… we have a magic track where we can run better 60’s then everyone else on the planet with street tires (funny thing is that I’ve run the same times at 75&80 and MIR also

Blew up my tranny after making a few passes this weekend, unless I come up with something fast or decide to run my WS6 it looks like my season is done…

 

I will be shooting for that 13.99 this weekend

with some cool air and a decent sub 2.00 60' i dont think its entirely impossible

 

????? ???

I hate Capitol, the place is a sh!thole, but it's close. That's not a shot of the 1.79 run, I cut that 60ft. at Budds Creek

BTW, who are you? I may have seen you up at Crapitol.

 

 

I have all bolt ons with nitrous in a 88 L98 700r4 13.1 with a very severe traction problem. I have no doubt in my mind that if I had any form of street slicks or slicks I would run a high 12.

 

I’m usually up there with a beat up ’87 formula 350, silver with charcoal bottom stripes, occasionally I’ll have something else like my Black ’97 WS6, my old white ’83 TA or even my blue/green K1500 blazer (yes, 33” AT tires do decent burnouts and high 16’s are fast enough to hold back most of the diesels).

I’m usually up there with my brother that has a grey (used to be white), 84 Ford LTD LX 4 door that is usually running 11’s (302 with a custom blower setup)

People seem to recognize me when they see me also, no matter what car I have (I always have people walking up to me and I usually don’t remember or know where they know me from); I’m a big guy, brownish/blondish ponytail and beard, about 6’4’, 305# (most of it is in my chest and shoulders, about 58” chest and 38” waist, and most people don’t guess that I’m over the mid 2xx range unless you put me next to something).