I'm trying to get my car into the high 13s. I don't know what I run because I've never taken her to the track. But check out my current mods. I have a ZZ9 cam I'm thinking of putting in but not sure.

I just want to know everyone's mods, 1/4mile, and if they have stock heads on there.
thanks

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'92 Formula
305 TPI 5speed
1LE package
Mods: SLP headers,SLP catback,SLP air foil,ported plenum,Crane AFPR (42psi),MSD6AL,homemade cold air,K&Ns,3:73s,JET fan switch, Macewen white face gauges...ZZ9 cam (i still have to install it )

with stock heades

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92 b4c 305 t-5
ported plenum
58mm TB
dynomax headers
msd coil
adjustable fuel regulator
air foil
K&N
TB coolant bypass
smog pump bypass
worldclass t-5
custom built y pipe
hi-flow cats
flowmaster
hurst shifter
3.73 rear

13.87 @102mph

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92 b4c 305 t-5
ported plenum
58mm TB
dynomax headers
msd coil
adjustable fuel regulator
air foil
K&N
TB coolant bypass
smog pump bypass
worldclass t-5
custom built y pipe
hi-flow cats
flowmaster
hurst shifter
3.73 rear

What! Those are awesome times boyyyy!

You had the stock cam too?

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'92 Formula
305 TPI 5speed
1LE package
Mods: SLP headers,SLP catback,SLP air foil,ported plenum,Crane AFPR (42psi),MSD6AL,homemade cold air,K&Ns,3:73s,JET fan switch, Macewen white face gauges...ZZ9 cam (i still have to install it )

My times and mods are in my sig. I also have 102,000 miles.

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1988 Formula 5L/5sp 3.45 gears, SLP cold air kit, MAS gutted, TPIS air foil, TPIS AFPR, MAC headers, Mac under drive pulleys, MAC cat back, Relocated MAT.
Best ET street tires 13.85
Best 60 FT street tires 1.930
Best MPH street tires 99.29

Well im not running 13's yet but my best time I just got yesterday is pretty good for the little amount of mods i've done to my 305. look at my sig.

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88 Iroc 305 TPI 5 speed
Performance Resource Chip, Flowmaster American Thunder cat back exhaust, B&M Ripper shifter, MSD coil, TB bypass, TPIS MAT relocation kit , TPIS 170* t-stat, Richmond 3.73 gears, March Power & Amp pullies Home made Ram Air
Best et: 14.338
Best mph: 96.97
Best 60': 2.106

Isn't the 58mm TB waaay too big for your car??? I ran a all time best of 14.6 on saturday..All I did was buy tires and I gained 3 tenths and 1 MPH!!! It was a 14.68 at 93.9

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-Red '88 IROC 5 Speed 305 TPI w/3.08
-Dual Friction Centerforce Clutch
-Accel 300+ Racing Ignition
-Accel 300+ Pro Sleeve Plug Wires
-Accel U-Groove Plugs
-Flowmaster Force II 3 Chamber Cat Back Exhaust
-Hypertech Chip
-Hypertech Airfoil
-Removed, Then Re-installed (out of fear) MAF Screens
-Gutted Air Box
-Best E/T 14.90, 60 ft. 2.17, 1/8th mile 9.61(bald tires, Code's 34,36)
-Best MPH 92.7(bald tires)

The below tome is w/o headers, sfc's!



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1992 Texas DPS B4C 1LE FE2 5.0/5spd:
Intake and Plenum Ported
Fully Ported Corvette Heads
TPIS Tricks ,No Smog Pump, NOS FI Fuel Pump
K&N's Adj. Fuel Pressure Regulator
Alston SFC's, Energy Supension Hyperflex system
MSD 6AL, SLP 1 3/4" SS Headers
3.73's with 275/55/16's out back...blew those now 2.73 one legger
My complete back seat
encompases my RF tunes...

Currie 9" on the way with 3.70 gears

Adam

13.9 @ 99MPH
Make/Model/Year of Vehicle: 1987 Tpi Firbird Formula
Year of Motor: 1987
Year of TPI intake/runners/plenum: 1987 (SLP Runners)
Motor displacement (ci or liters): 305
Estimated Horsepower/Torque: 285
Aftermarket parts
1) Cam = Comp Cam Part # 08-305-08 intake 214 (510 lift) exhaust 220 (510 lift) lobe separation 114 (matching valve springs)
2) SLP intake runners
3) SLP Headers and Y-pipe
4) Flowmast 3inch exhaust
5) March power pulleys Crank Alternator
6) Crane adjustable Fuel pressure regulator set at 50psi
7) Jet fan switch
8) K&N Filter
9)SLP Intake Runners
10)Coolant Bypass
11)Maf de-finned
12)Intake plenum ported
13)160 degree them
14)Rear Gear Ratio: 3.27 (BW 9bolt)
15)Fuel Injector size: 19
16)Base timing degrees: About 10 degrees BTDC.
With these mods 13.9 at 99mph (with wheel spin)
I know with deeper gears and a aftermarket chip I should be in the low thirteens (with stock heads.
When I change to the votec heads I am hope to break the 12 second mark. witha stock bottom end 305

I am convinced I can get a 13.99 with all bolt ons..AND 3.08 gears. This may sound nutty but I am 6 tenths away and I think I can do it. Read this bolt on list and tell me what you think.

AFPR @ 49 psi
Hi-flo cat
Larger Injectors
Headers
Pulleys
Cold Air with K&N
Ported Plenum and maybe SLP Runners
Fix my Error codes

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-Red '88 IROC 5 Speed 305 TPI w/3.08
-Dual Friction Centerforce Clutch
-Accel 300+ Racing Ignition
-Accel 300+ Pro Sleeve Plug Wires
-Accel U-Groove Plugs
-Flowmaster Force II 3 Chamber Cat Back Exhaust
-Hypertech Chip
-Hypertech Airfoil
-Removed, Then Re-installed (out of fear) MAF Screens
-Gutted Air Box
-Best E/T 14.686, 60' 2.205, 1/8th mile 9.461, 1/4 MPH 93.91
-Best 60' 2.17

I don't know how much of it is in my sig, but for $850 in engine work, here's what my little engine can do.


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Daniel Burk
http://www.isthq.com/~dan/fcar.html
'84 Trans Am WS6/L69
KB SFC, Moser axles, Torsen Diff. PST suspension, Braided stainless brake lines, Koni struts, 11-inch rear disks,Spohn Adj. torque arm,
Ported 305 heads w/1.94"intake valves, Comp Cams XE262H, Griffen alum. radiator,
Turbine Technologies 2500 stall converter, underdrive pulleys, Crane Hi-6 & more.
1.05g skidpad verified.
New best E/T! 14.039 at 100.82 MPH in 41 degree air at Stanton, Michigan.

The only 305 TPI 5 speed I helped with,,, a friend bought a new 305 TPI 1LE 5 speed back in the late 80's early 90's (not sure which year model). Best I remember (long time ago),,, show room stock (street tires and all)it ran a high 14.80 something (via my Vericom - me in the car). This was about .35 - .4 seconds faster than a bone stock Mustang would read on my Vericom with me in the car. We installed a 160 stat, K&N filters and just took out the air deflectors - not a gutting, bumped the TPS and the timing, bolted on 26x8.5 slicks, took it to the track, slid the clutch at 4500,, rode it hard,,,, and I know it ran one 13.98,,, and a couple 14.0's!!! - before the stock clutch started a vacation. So,, depending on the shape / wear and tear of your engine - if it's in good shape,,, with your mods and sticky tire,, I'd think you should have little to no problem busting in the 13's.

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86 IROC - 9.8:1 - 355, TFS twisted wedge heads, 218/228-110, fully ported GM base and plenum, SLP runners, 52mm BBK, 24# SVO, 1 5/8" Headman headers, 2.5" Dynomax, TH350, 2200 stall, B&M Megashifter, 3.23 peg leg, 245/45ZR17s on 212 Eagles

Bad SS, whatd you bump the timing up to and what do you mean by air deflectors.

Those are awesome times man

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'92 Formula
305 TPI 5speed
1LE package
Mods: SLP headers,SLP catback,SLP air foil,ported plenum,Crane AFPR (47psi),MSD6AL,AC delco cold plugs, Bosch O2sensor, homemade cold air,K&Ns,3:73s,JET fan switch, Macewen white face gauges

theformula, we bumped the base timing to 10 degrees. I say "air deflectors",, it's the thin plastic and removable deflectors that's directly under the air filters,, in the air box. They're held in there by screws. Depending on who had the car before you,, they may have already been removed,, or your air box may have already been "gutted". The trick if anything to his times was in the launch. Holding the rpms at 4500 and slidding the clutch,, adding gas,, keeping the rpms at 4500rpm,, with the rpms never droping below 4500 in first gear. Takes a while to "master",, and it's EXTREMELY hard on the clutch,, but made for very good times,, while the clutch lasted!!!!!

My best naturally aspirated time is a 14.07 with a 1.80 60-footer. This is with mods selected for a supercharger, but run without one. This would include:

52mm throttle body,
ported plenum,
TPIS large tube runners,
TPIS "Big Mouth" base,
ported/polished Corvette aluminum heads,
Pete Jackson quiet gear drive,
Stewart water pump,
Crane 2032 cam,
Crane Gold 1.6 rockers,
SLP 1-3/4" headers,
dual cats,
3" catback,
Pro Torque 10.5" 2,600 stall converter,
Stock 700R4 (with massive amounts of overlap),
GM 3.73 gears, &
Auburn limited-slip, plus
all the "free" mods.

Granted, many of my mods are really not compatible with my 305 and I'm probably slower than I should be, but I selected these mods with a supercharger in mind.

This was run with 38-degrees total advance.
My MAF airflow readings maxed out at 190 g/s. In comparison, it reaches its physical limit of 255 g/s with the supercharger creating 6 psig boost.

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Willie

Supercharged 1987 305 IROC-Z, Daily-Driver, Emissions-Legal.
12.57 @ 111 mph.
12.04 @ 114 mph (50-hp nitrous).
http://members.optushome.com/au/downunder1/rides/willie/willie.html

1987 "20th Anniversary Commemorative Edition" Z28 Convertible -- Super Chevy Show Class Winner, 1998.

[This message has been edited by Willie (edited December 02, 2000).]

I run a 14.2@98-99, with the parts below, before I shaved a few more 1/10s off in the 1/8 so it would be in the 13's if I had not messed something up :-)

2200 stall
corvette servo
flowmaster
compucar cam(was peanut cam)
SLP runners(no port work on intake)
Eldebrock headers
3.73 posi
homemade ram air
hypertech chip
NOS

9.08 @78 NA
8.01 @88 w/ 125shot

Oh and unless you plan serious more mods down the road the 3.73 will not help. It actually slowed me down a little

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1986 305 TPI
8.0 @88 in the 1/8
**Soon to be 355

I ran a 14.4 @ 94mph on an all stock engine. I think I woulda hit 14.3 but I was on 89 Octane when I ran my 10 BTC, my best 1/4 mile time was on 89 Octane with 8 BTC. This also was done with tiny bit of wheel hop cause my shox and struts are shot to hell. With my new SLP 1 3/4 headers, 2 new cats, afpr, underdrive pulleys, edelbrock RPM series catback, and a rear suspension kit from Hotckis Performance I should hit around 13.9 or 13.8.

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90 Iroc LB9 5spd G92
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Dual Cats, 3.42 Borg Warner w/Posi, TPIS Airfoil, K&N, 160 Thermo, Mobil 1 Extreme Formula 0W-30 Synthetic Motor Oil, Home Made Ram Air, ACDelco Plugs, 8.8mm 300+ Accel "Race" Wires, Accel Cap And Rotor, Ported and Gasket Matched Plenum, TB Coolant Bypass, Advanced Timing To 10 BTC
Best ET(Not Corrected): 14.4 @ 94mph with 2.022 60ft
My 3rd Gen Web Page