305 to 350 emissions
Thread Starter
Joined: Aug 2006
Posts: 12,804
Likes: 103
From: Central NJ
Car: 86 Trans Am
Engine: 408 stroker sbc
Transmission: TKO600
Axle/Gears: Moser full floater m9, 3:70 trutrac
305 to 350 emissions
anybody here pass emissions with a 350 tpi swap in a original 305tpi car? Preferably in NJ?
curious about a future project
thanks
-Phil
curious about a future project
thanks
-Phil
Last edited by //<86TA>\\; Jan 11, 2009 at 08:58 PM.
Member
Joined: Jan 2008
Posts: 129
Likes: 0
From: nor cal
Car: 87 Z28
Engine: 89 tpi soon tpis big mouth & tubes
Transmission: 700r4
Axle/Gears: 3:43
Re: 305 to 350 emissions
About three months ago my lb9 (305) was smogged, he in cali. It passed then I noticed the guy had it set to 350 When I asked him about He clamed it wad the V8 default. I not sure if thats true but if it's so, Maybe NJ the same way. As long as every thing is there & working, shouldn't be a problem. As long as the 350's fairly stock & running good.
Joined: Jul 1999
Posts: 10,950
Likes: 26
From: Orange, SoCal
Car: 1990 Pontiac Trans Am
Engine: 355 TPI siamesed runners
Transmission: Tremec T56
Axle/Gears: 12-Bolt 3.73
Re: 305 to 350 emissions
NJ law is pretty similar to CA smog law. You can replace an engine with another engine that was offered in the vehicle with no problems. So yes you can replace a 305 TPI with a 350 TPI. I did it 8 years ago with no problems.
Senior Member
iTrader: (2)
Joined: Nov 2005
Posts: 600
Likes: 1
From: Old Bridge, NJ
Car: 1992 Camaro RS
Engine: 383 SuperRam
Transmission: 4L60
Axle/Gears: 3:23 Posi
Re: 305 to 350 emissions
I did a swap from TBI to TPI on a 305 and had no problems passing emissions in NJ before I swaped out for a 383. I dont know if the 383 will pass but Im not going to find out I went with collector registration.
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