Ok stupid question.. but can you do it? Say with after market heads, runners, and larger jets?

 

you will need either 350 injcters or an adjustable fuel pressuer regulater.

 

I am running one currently with no problems.

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86 Trans Am 355 TPI Rebuilt 700R4 with Corvette servo, modified valve body, and a B&M Torque Converter (2000 rpm stall w/ lock up), 87 350 block bored .30 with new crank, bearings, rings, and magnafluxed rods. Reworked 305 heads with 3-angle valve job. Added in the rebuild was an SLP TPI cam, BBK 58mm Throttle Body,SVO 24# injectors,MSD 6A, Hypertech Power Coil, 1.5 Crane roller tipped rocker arms, SLP Intake Runners and Port matching in upper intake including fully ported plenum, TPIS adjustable fuel pressure regulator @ 46psi, Hooker shorty style headers w/ Thermotech heat wrapping, Custom 3” exhaust with Flowmaster muffler and chrome quad tips, Hypertech Thermomaster Computer chip, K&N open element cone filter on modified MAF per TPIS specs, MSD Wires, removal of A/C hardware and a 1LE firewall cover installed. Also there has been a PST front suspension kit with Hotchkis strut tower brace
http://geocities.com/SunsetStrip/Garage/9548/kyle.html

Kills:
95 Talon TSI, 96 Probe GT, 91 T/A L98, 89 RS, 86 Mustang GT, 88 Mustang LX 5.0, 92 Thunderbird V8. couple or ricers that I think were Civics or Preludes not sure what year, 95 Celica GT-S, 94 Chevy 1/4 ton 350, one of those NASCAR F150's

 

The hardware is identical. The only difference is the injector size. 19lb 305 injectors, and 22lbs 350 injectors.

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1991 Camaro Z28
5.7L 5-Speed
13.25 @ 107.18 MPH
Southern California
Member: SoCal 3rd Gen F-Bodies
Webmaster: SoCal F-Bodies
Webmaster: ICON Motorsports

 

Don't forget the knock sensor is different too

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1992 GTA (226 made), 1 of only 18 "Dk. Jade Gray Met. Primar" 92 GTA's, Window Sticker, 305 TPI, 700R4 4-Speed, T-Tops, Grey Leather, every option except rear disk brakes (Oh well, makes it 1 of a kind), and CD.
Current Mods: 80 Series Dual Outlet Flowmaster, TPIS Air Foil, Quaker State HyPo Synthetic 20W-50, and a K&N Oil Filter. THAT'S IT! 98% STOCK!
Future Mods: Subframe Connectors, OE Replacement K&N Air Filter, and Gold Tips.

"If it ain't broke, fix it til it is!"

[This message has been edited by 92GTA (edited July 25, 2000).]

 

If you say so... I used my same one. Part numbers I've checked say 85-89 TPI use one knock sensor, 90-92 TPI use a different one, irregardless of engine size.

 

is the MAF sensor the same? so the only diff. between 305 TPI and 350 TPI is injector size? does this include MAF sensored camaros (like my 85 Z-28 305 TPI) or just speed-density equiped camaros??

I am VERY interested!!!!

James

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1985 Z-28 305 TPI
215,000 mi. Original Eng.

 

Kevin,
I don't know about the MAF cars but on the speed denisty cars, to my knowledge, the knock sensor is different for a 305 vs. 350.
I was not only told this by a local dealer but also by just about every auto parts store I called in this area when I did my 305 to 350 swap.
James, MAF is the same.

 

I bolted my 305 set up on a 350 with no problems. Then I went on to add other mods. Yes you will want to get a fuel pressure regulator, but you dont need it. I didn't change the knock sensor, didn't need to change the MAF. The MAF would probably be better to run a 350 anyways. MAF is easier to mod... its less sensitive to cam changes and the such. If anyone wants to argue me on this I will go into more detail about it.

------------------
86 Trans Am 355 TPI Rebuilt 700R4 with Corvette servo, modified valve body, and a B&M Torque Converter (2000 rpm stall w/ lock up), 87 350 block bored .30 with new crank, bearings, rings, and magnafluxed rods. Reworked 305 heads with 3-angle valve job. Added in the rebuild was an SLP TPI cam, BBK 58mm Throttle Body,SVO 24# injectors,MSD 6A, Hypertech Power Coil, 1.5 Crane roller tipped rocker arms, SLP Intake Runners and Port matching in upper intake including fully ported plenum, TPIS adjustable fuel pressure regulator @ 46psi, Hooker shorty style headers w/ Thermotech heat wrapping, Custom 3” exhaust with Flowmaster muffler and chrome quad tips, Hypertech Thermomaster Computer chip, K&N open element cone filter on modified MAF per TPIS specs, MSD Wires, removal of A/C hardware and a 1LE firewall cover installed. Also there has been a PST front suspension kit with Hotchkis strut tower brace
http://geocities.com/SunsetStrip/Garage/9548/kyle.html

Kills:
95 Talon TSI, 96 Probe GT, 91 T/A L98, 89 RS, 86 Mustang GT, 88 Mustang LX 5.0, 92 Thunderbird V8. couple or ricers that I think were Civics or Preludes not sure what year, 95 Celica GT-S, 94 Chevy 1/4 ton 350, one of those NASCAR F150's

 

You will need new fuel injectors unless you want your 350 to run REALLY lean.

------------------
1987 Chevy Camaro IROC-Z
L98 TPI 350 (5.7L)
TH 700R-4 Transmission

Current Mods: Edelbrock TES Headers, Hooker Cat-Back System, Performance Resource Chip, 160* Thermostat, Accel 8.8mm Ignition Wires, K&N high flow air filters, gutted air box, gutted MAF sensor, Throttle Body Coolant By-Pass, Homemade Ram-Air, Falken ZIEX Z-Rated Tires.

1/4 mile times without chip:
Best ET: 15.7 @ 89MPH
Best Corrected ET: 14.5 @ 96MPH

 

I completely disagree with that lean statement, Dan87IROC-Z. Fellow here has a ZZ3 350 w/TPI, high flow aftermarket intake (extrude honed the intake and the heads together) and runners, big cam (bigger than the ZZ3), dual cat w/3" catback exhaust, AFPR, custom chip. He had 24 lb injectors in last year with a 58 mm TB, but needed to pass emissions this spring and put the 19's back in and the 52 mm TB back on. Passed emissions, went out to the track, and with no other mods except adjusting the fuel pressure up, promptly recorded his best time ever.

With the 24's in, he'd pass black smoke at every shift and most of the way through 3rd at the track, even with the fuel pressure backed down. With the 19's, no smoke, better times. Granted, this is at 5800' Bandimere, where the air is thin.

The AFPR is the key, as kjgroen said.

 

FYI: the higher the pressure, the more volume
is sprayed with each pulse. Also, TPIS claims
they got a better spray pattern on a 350
using 305 injectors.

-- Joe