I have seen some people on here using 3400 to describe the 3.4 TDC/DOHC engine as well as other engine misnaming. I would like to offer my knowledge of the automotive world to put the correct names to the correct engines to try to limit confusion...

3.1L -- Three versions were made by GM, all equipped with hydraulic, flat-tappet cams:
-3.1L MFI - Camaro/Firebird iron head engine
-3.1L TBI - FWD Minivan iron head engine
-3.1L MFI - FWD GM car aluminum head engine

3100 V6 -- Two versions made my GM, both equipped with hydraulic roller cams and aluminum heads:
-3100 Early - standard rocker arms
-3100 Late - roller rocker arms

3.4L -- Two versions made by GM
3.4L MFI - Camaro/Firebird cars with iron heads and might have a roller cam (I am not sure)
3.4L Crate - Available from GM Performance Parts for use in carburated S-truck platforms and equipped with iron heads

3400 V6 -- One made by GM, one camshaft, OHV
3400 V6 - Equipped in FWD car and van applications and all equipped with roller cams and aluminum heads, I am not sure all had roller rocker arms but most did.

3.4 TDC/DOHC -- Three versions made by GM
3.4 TDC Early - No cam sensor and one crank sensor, one piece upper intake plenum with integrated throttle body.
3.4 TDC Late - Two crank sensors and one cam sensor, one piece upper intake plenum with integrated throttle body.
3.4 TDC 96-up - Two crank sensors and one cam sensor, Two piece upper intake plenum with seperate throttle body and different exhaust ports/manifolds/heads than previous engines.

Hope this clears things up...

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1987 Pontiac Fiero Coupe #18,838
3800 Series II SFI; 4T60-E Trans w/ 3.33 final drive; Terminator exhaust; 4 wheel vented disc conversion; Walbro 307 fuel pump; W-body air box w/ K&N filter; Rear 32mm sway bar; 134a functioning A/C; GM CD player w/ factory location sub; much more and...a stock GN's TURBO on the way!

Conversions Performed:

1985 SE 3800 Series 1 SC 4T60-E

1987 Coupe 3800 Series II 4T60-E

1987 SE 3.4 DOHC 5-speed (under construction)

http://dtcc.cz28.com

Do you know the HP rating for each engine? Just curious.

Can you tell me if the TDC motors used a steel billet flywheel, or a cast flywheel?
Thanks

I believe the flywheel we got for the DOHC was cast iron.

1999 and up 3100 SFI LG8
175 hp, 195 ft-lbs

3100 SFI LG8 Specs

[This message has been edited by Mick (edited 11-21-2002).]

Cool, thanks mick; if anyone else has some updated information, please post it here as my info is not complete and current...

Hey thanks. How about the break down of the 3800 series motors?

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87 Fiero GT (Rotrex Supercharger)
Fastest ET so far: 14.5 @ 94 mph
WW.ANGELFIRE.COM/PA5/DAVIDFIERO

http://www.gm.com/automotive/gmpowertrain/engines/gmpow/index.htm

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steve@digitalfusion.on.ca

The 3.4 pushrod engine in 93-95 f-bodies and the 3.4 pushrod crate engine are the EXACT SAME ENGINE, except the crate motor is only a long block. GM switched to the 3800-II as the base engine in 1995 F-bodies midway through the production year, but had a full year worth of 3.4 engine production. Those crate engines have been warehoused as leftover 1995 production and could only be sold publicly for a truck application since that is the only place it is a direct bolt-in and needs no modification, and there's a large market for it there too (bonus). Since you have to modify the block to fit it in our beloved cars, there's no way they're going to list it for our application. The camshaft isn't "intended" for a carb like some have argued, it's the same cam as in the '93-'95 SFI system.

Dave

quote Originally posted by DaRkLoRD: http://www.gm.com/automotive/gmpowertrain/engines/gmpow/index.htm

excellent link!

quote Originally posted by Darth Fiero: 91-92 3.4 DOHC 210HP / 215TQ (manual trans) 91-92 3.4 DOHC 200HP / 215TQ (auto trans) 93-95 3.4 DOHC 210HP / 215TQ 96-up 3.4 DOHC 215HP / 220TQ

91-92 3.4 DOHC 210HP / 215TQ (manual trans) GM named TDC
91-92 3.4 DOHC 200HP / 215TQ (auto trans) GM named TDC
93-95 3.4 DOHC 210HP / 215TQ GM named TDC
96-up 3.4 DOHC 215HP / 220TQ GM switched name to DOHC