i really didnt see a thread like this and this should be a sticky of what tpi's can do....i love tpi and im sticking with it..alot of people dog tpi's.... i wanna see what people are using with tpi... when set up right tpi's can be potent... its not all about horsepower...... here is mine... my list is long but its pretty nice setup..... ENGINE MODS...... fresh 355 bored .30 over 4 Bolt Main Vortec Block 10243880 Gm cast Block Blueprinted Performance build ( bored with thrust plates) 9.7 to 1 Compression Milodon Main Cap Bolts Eagle 5140 Forged Steel "SIR" Lightweight Connecting Rods ARP Rod Bolts Eagle 4340 Forged steel crank Upgraded Clevite 77 H Bearings Kieth Black Hypereutectic -12cc dished pistons dura-bond hi performance coated cam bearings Pioneer heavy duty brass freeze plugs Internally Balanced Eagle rotating assembly (rated at 650 horsepower) Elgin Lifters Heavy duty flywheel New harmonic balancer LT1 mini Starter Highflow radiator High flow water Pump ARP headbolts Rebuilt L98 heads with manely springs, retainers, screw in studs SA performance double timing chain GM LT4 HOT Cam 218/228 .492"/.492" 112 LSA Comp Cams 1.5 roller tip rockers INDUCTION/FUEL DELIVERY MODS..... Fully ported and Siamesed Plenum, egr walls grinded down Fully Ported and Siamesed SLP Runners port matched to Plenum Edelbrock Ported Highflow Intake port matched to runners SLP's CAI with K&N air filter and SLP's special modded intake hoses IAT relocated to SLP CAI box 48mm throttle body with Airfoil 180 thermostat SVO 24lb Injectors Heated O2 sensor Crane's AFPR set at 43psi OIL SYSTEM MODS..... Melling 10553 Oil pump hardned pick up L98 Oil Pan SUSPENSION/CHASSIS MODS...... WS6 suspension 36mm front sway bar with poly bushings 24mm rear sway bar with poly bushings new poly sway bar links Front K-member Braces UMI Steering Brace BMR Strut Tower brace BMR weld in outer subframe connectors Alstons weld in Inner subframe connectors BMR non adjust Torque arm poly bushing hotchkis Non adjust Panhard bar poly bushings J & M Street non adjust Lower Control Arms BMR bolt in lower control arm relocation brackets Transmission Mods........ Built 700R4 (rated at 500 hp) 2300 Stall converter tranny poly mount Corvette Servo Hardened beast Sun Shell 5 pinion front and rear Planet Gears heavy duty sprags High Energy Clutches High energy Band B&M Shift Kit Tranny cooler Rear End mods......... built 9 Bolt Borq warner 3.27 Gears (rated 385hp 416Tq) TA performance aluminum rear end girdle Cover 1/2 pint fluid increase 15 degrees cooler operating temp ARP rear end Girdle cover Bolts aluminum driveshaft Neapco brute force u-Joints EXHUAST MODS...... Hedman longtube Street headers Custom 3" y-pipe Catco highflow Gutted converter Flowmasters 80’s series 3.5 inch catback IGNITION MODS...... New distributor MSD 8.5 super conductor wires accel Super coil MISC MODS....... 2 seater conversion 150lb weight reduction tuned by PCMforless rev limiter set at 5500rpms New belt Tenisoner and pulley AC delete pulley New delco Alternator Throttlebody Bypass delete Oil Cooler delete diverter valve delete cruise control Delete Washer fluid Delete Cold Start Delete Cat Delete AC delete EGR delete Heater valve delete Air delete smog delete Vats delete

Engine
355ci L98
GMPP Vortec Heads
GMPP 1.6 Rockers
Edelbrock Vortec TPI Base
SLP Runners
Ported Plenum
LT4 HOT Cam
52mm Electronic Throttle Body (Drive by Wire)

Electronics
LS1 PCM (using 2003 Corvette calibration)
LS1 Ignition Coils (distributor-less)
Tuned with EFILive and Moates.net RoadRunner PCM

Transmission
4L60E

nice... i like how you intergrated the ls1 wiring onto the gen 1 blocks....... we have the same setup minus heads...

Original Owner
Factory ordered from GM December 1988 delivered May 1989 in Vancouver, Canada.

Purchased As
1989 GTA, 5.0 liter TPI engine, T-5wc transmission and 9 bolt 3.45:1 differential
T-Tops with metallic flame red paint and beachwood tan cloth interior

Current mileage approximately 241,000km

MODIFICATIONS
Engine
New GM replacement 5.0 liter engine at 186,628km
Comp Cam extreme energy XR258HR camshaft

Ignition & Electrical System
MSD HEI pro billet distributor, blaster coil and super conductor spark plug wires
Bosch duel electrode platinum spark plugs
Optima battery
Wilson gear reduction starter

Fuel/Air Induction System
FMR EV-1 19lbs/hr fuel injectors
Holley adjustable fuel pressure regulator
Holley air foil
K&N air filter
BBK 255 LPH fuel pump
Ported plenum
Throttle body coolant bypass
Modified stock air filter canister

Exhaust
Hedman Hedders shorty style headers
Walker super turbo muffler
2.5" to 3.0" intermediate pipe to muffler

Cooling System
New stock radiator
Edelbrock victor series water pump
Mr. Gasket 160 degree high flow thermostat
Converted air conditioning system

Computer & Sensors
New GM computer
Custom PROM from Wester's Garage
New Thick Film Transistor MAF sensor
New IAC, EGR and ICM sensors
Bosch heated O2 sensor

Brakes & Tires
New Raybestos rotors, calipers and ceramic brake pads
BF Goodrich Comp TA radials

Steering & Suspension
Moog front and rear end links and front sway bar bushings
TDS steering brace
Edelbrock strut tower brace

Transmission & Differential
Transmission professionally overhauled at 231,713km
New Luk clutch
Differential professionally overhauled at 232,965km
New Australian 9 bolt carrier from GM
Yukon 3.73:1 gears

Body
Ziebart rust protected and undercoated in May 1989
New metallic flame red paint
North Country fiberglass aerowing
Bosch halogen head lights

Interior
Original

Engine

Displacement: 406 cu in
Induction : Port Matched Siamesed Big Mouth Base/LTR's/Siamesed Plenum/58mm TB
Heads: AFR 195cc Comp. 68cc
Cam: 224/230 on XFI lobe profile 573/568 lift 113 lsa/1.6 Rockers
Compression 11:1
Ignition: MSD 6AL Module/Distributor/Coil/Wires
Exhaust: 1.75 Long Tubes/Catted Y-Pipe/HTP Catback

whats the point in this without track numbers or dyno numbers?

383 ci
Forged Eagle Stroker Kit
AFR 195cc, 65cc chambers, #1034
Comp Cams XFI 274 (224/230) .573"/568" lift, 113 LSA
TPIS Bigmouth Intake, Runners, and 52mm TB, ported plenum
Dyno Don's 1 3/4" headers, Flowmaster 3" cat-back
No times or numbers yet

This... Without a measure of performance what good is a list of aftermarket parts?

guess ill be the first to list numbers/times

SBE 880 vortec truck motor
stock vortec 906 heads with beehive springs
scoggin dickey vortec TPI baseplate
SLP runners
BBK52mm tb
edelbrock headers+y
comp roller tip rockers 1.6 ratio
SLP 210/214 cam "roller"
3.45 9 bolt
5speed trans

full weight formula, with all power options

299rwhp/401rwtq car ran a best of 12.20 on mickey thompson drag radials on motor, and 11.29@127 on nitrous with a terrible 60ft, and spinning into second..

car was tuned/setup for spray, an all motor tune woulda net a little more power

...................................................................................

same SBE 880 truck motor
ported vortec 906's
comp turbo cam 230/236"roller"
holley stealth ram
1.6 full roller rockers
edelbrock headers+y


363rwhp/420 something torque{i forgot} and this one hasnt been to track yet. LEAN tune of 13.8 afr{injectors maxxed}, and conservative timing 28* total

89fbirdformula, that's a start... With numbers it's easier to get an idea of how well it works in the real world.

Is this thread dying a quick death?

Ok, I will add mine. Numbers with old 355ci motor. New motor should be a significant improvement. See signature.

No, it was started a year ago and died peacefully. Now it's back in business.

Numbers/track times will definitely help this thread out though.

I'll post my new stuff after I get it dynoed.

Well here ya go!

Vortec 383 TPI- 1988 GTA-Pocket ported heads, smoothed and polished exhaust ports, ferrea valves and sized intake ports at the pushrod pinch (to prevent port stall). Vortec TPI intake, ported and sized. AS&M Long Tube runners. SLP 1 3/4 headers, 30# SVO injectors, welded and ported plenum. Custom CAI system. All induction components ported to proper CSA based on length and target peak torque RPM. 0411 PCM. Borla catback, dynotune, stock stall, 4L60-E. 10.4:1 compression. Typical bolt on mods. Makes 335 RWHP at 5400 RPM and 451 RWTQ at 4050 RPM. 30mpg@ 70mph. Needs more dyno time.

350 TPI- SLP siamesed runners, ported. Stock GM TPI base, ported. welded and ported TPI plenum. SLP shorties and borla catback. Stock rebuilt 350 TPI heads. 10.2:1 compression, LT1 cam. typical mods. Unknown how much power it made but it ran well before I pulled it.

382ci Tuned Port LT1
LE2 LT1 heads, Accel TPI conversion base, Accel runners, Electric water pump, double roller LT4 chain, 30# SVO injectors, typical bolt ons, 0411 PCM, 1 3/4" custom LT headers, custom firing order cam, Mounted in front of C5 torque tube and T-56 with custom crank spacer plate, not done yet so no dyno #'s since changes.

427ci TPI
Casting#183 Bowtie block, Offset ground 3.875" crank to 4" stroke with honda journals, custom firing order cam, FIRST TPI intake, ported aluminum heads to match. Waiting on parts from the machine shop.

335ci Tuned Port L99 (baby LT1)
similar to LT1 above but smaller. Waiting on parts to send to machine shop. I need more cash around here.

I've done lots of rebuilds and no buck/low buck mods and porting to TPI and LT1 engines. They are fun to play with.