Ok, here is what I have,
--.040 over 305,
--9.5:1 compression,
--SLP cam part# 51002, Dur 258/264, Dur @ .050 206/212, lift 480/487 Centerline 112
--SLP 1 3/4" headers,
--SLP 3" cat back exhaust,
--1LE Aluminum driveshaft,
--Ported & polished Intake, runners, & plenum.
--3.73 Richmond Gears
--Boxed in control arms & pan-hard
--Frame connecters

I would love low to mid 13's.. or is fast never fast enough?


------------------
87 Formula 5.1 converted to TPI Yellow/Black
SLP cam, headers, cat-back exhaust
Ported & polished TPI intake
Gil Younger (no yo-yo) Shift Kit
Aluminum Driveshaft
3.73 Posi gear
Baer 12" brakes 4 wheels
Hotchiss strut tower brace
South side machine frame connecters
Custom reinforced control arms and pan hard bar.
Custom Leather interior

87 Formula TPI (5 Speed) Yellow/Gray STOCK

83 Camaro (Parts)
83 T/A (parts)

http://www.3rdgenformula.com

 

13s, I dont see why not with your cam and mods. But the headers are a bit big for a 305, I'd try some 1 5/8". Its funny - TPI motors - a 1.47" intake runner and a 1 3/4" exhaust tube thats backwards. Man they should have made the TPI 1 3/4" runner.

------------------
91 B4C 305 TPI - SOON TO BE 383
TREMEC 5-SP, STOCK 1-BOLT REAREAND w/342 GEARS, K&N, AIRFOIL
EDELBROCK HEADERS, DUAL CAT TO HOMEMADE Y-PIPE & 3.5" SINGLE PIPE W/ FLOWMASTER, CRANK PULLEY, MSD, FUEL PRESS REG, COWL HOOD, WELD WHEELS
14.1@ 98MPH
-------------
OTHER RIDE
67 CAMARO - STREET CAR, BIG BLOCK, PUMP GAS
350TH w/ATI 10", 12-BOLT w/373 GEARS
10.94@124.13 ON MOTOR - ET-STREETs w/MUFFLERS

 

I think you should see high 13s no problem, with good traction of course. You know of the only for sure way to find out though...... Let us know how it goes.
bsa

------------------
"If they do not run, Then they will die." - Stonewall Jackson
#3
'87 IROC, 355 TPI, Converted to SD, 700R4, B&M Megashifter, 3.42, Trick Flow Twisted Wedge Heads, Edelbrock Intake, Accel Runners, Comp Cam, Crane Gold rockers, Lucas 24# injectors, Edelbrock headers, Flowmaster 3'' exhaust, Mallory Ignition, Transgo Performance Shift Kit, Corvette Servo, 2,000 Stall Torque Converter

 

I agree on the headers being too big. 1 5/8 is the biggest that is recommended. I believe the 1 3/4 cuts low-end torque.(305s need all they can get) You didn't say what you were running in the 1/4 right now. Here's a few ideas--A custom burned chip,an adj.fuel pres.reg.(between 48 and 53psi works best)<--(try this before bigger injectors),better heads,long rod-short piston(gives much better airflow for 305s),52mm TB. This should be enough for mid to low 13s. Then there is always nitrous and blowers but, I think you were refering to a naturally aspirated setup. Hope this helped.

------------------
89 IROC-Z 5.7L
130,000 MILES
2.77 GEARS
K&Ns FILTERS
ALL FREE MODS
FLOWMASTER MUFFLER
PERFORMANCE RESOURCE CHIP
Best 1/4 E.T. 14.37 @ 95 MPH
Best 1/8 E.T. 9.22 @ 76 MPH
Best 60ft. 2.07

 

I agree, I ran best of 14.21@96mph (14.5 normally) with my 92Z28convt5spd 3:08 posi, hollow cat, coolant bypass, and ported stock plenum, intake and runners. Imagine if I had bumped the timing up a bit, added an Adj FPR, used drag radials vice stock Eagle GA's and had something other than the stock suspension.

------------------
Rob P
89RSconvtZZ4TPI
Edelbrock Hi-Flow Intake
SLP Dual Cold Air Intake
1 5/8" Headers
Semi-Siamesed Runners
MSD6AL/AdjFPR/IROC frnt@rear swaybar/wonderbar/steeringbox/alum drvshaft/ Alston SFC/3:23posi disc rear/MAC LCA/H.Adams Panhard Rod/KYB struts/ shocks/
92Z28convt5spd
71Impala convt 402BB
BETTER DRIVING THRU SUPERIOR HORSEPOWER!

 

My 92 Z28 convertible 305TPI auto and 2.73 gears with Edelbrocks base, runners, TES, Flowmaster cat back, March underdrive pulleys, K&N's, and 100 shot of NOS ran a 13.19 @104.4 MPH.

------------------
Convertible, L98, Mini-ram, ZZ9 cam, Comp Cams 1.6/1.52 steel roller rockers, Trick Flow 23* heads, K&N's with chopped airboxes, March underdive pulleys, Edelbrock ceramic coated TES, Flowmaster cat-back exhaust, Dynomax high flow converter, Accel box & coil, Taylor 409 wires, Fastchips custom chip, MAC sub frame connecters, Lakewood LCA & Adj. Panhard rod, SLP 2500 stall, 3.23 rear gears, 1LE aluminum driveshaft, white face gagues, and NOS!

 

Have a peek here and lemme know if a 305 is capable of 13's...http://home.earthlink.net/~tpi305/
hehehe too much is never enough!!

-Brian

 

I think my BIGGEST problem is I am only running an 86 STOCK chip, My next mods will be:
--better Cold air intake & filter than the 87 Stock crap , Thinking of RAM AIR .
--adj Fuel pres reg.
--Airfoil
--underdrive Pulleys
--Custom chip (Thinking of learning how to Burn my own)

If that does not work I am going for the $2100 Vortech 350 and ploping my TPI on it. it should help a little. That is actually why i went to the larger exhaust.

I find it frustrating because I can hardley break loose (not a bad thing to have traction though)

The car feels like it is pulling around high 14's low 15's right now. It seems to shift too soon and not hard enough, It shifted better with my LG4 before I did the conversion to TPI.

------------------
87 Formula 5.1 converted to TPI Yellow/Black
SLP cam, headers, cat-back exhaust
Ported & polished TPI intake
Gil Younger (no yo-yo) Shift Kit
Aluminum Driveshaft
3.73 Posi gear
Baer 12" brakes 4 wheels
Hotchiss strut tower brace
South side machine frame connecters
Custom reinforced control arms and pan hard bar.
Custom Leather interior

87 Formula TPI (5 Speed) Yellow/Gray STOCK

83 Camaro (Parts)
83 T/A (parts)

http://www.3rdgenformula.com

[This message has been edited by okfoz (edited June 12, 2001).]