I will like for somebody to explain me what are the differences between 3.8 series I y II engines.Why series II makes more power than I ,is there a difference in cylinder heads, valves ,cam, intake or ECM; would appreciated a lot of details.

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" My intention is to " give a different point of view ", not to offend in any way; peace."
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Internals of the motor.. and I believe the Series II are more balanced all around, my dads friend who helped out putting mine in gave my dad the whole run down on differences between the Series 1 and 2.

The ECM's were OBD 1 up until I think 96? The people I've talked to said there isn't much difference from OBD 1 and 2, just the issues of getting past it and programming it is more difficult.

I'd go into the motor more but I'm a tad bit whipped.. there were little things that kept changing every year.. superchargers and what not that give the Series 2 the HP it has.

No one answers it, I'll be back after I take a nap

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88 5spd 3800 Series II SC Formula Yes it whines... do you?

[This message has been edited by LoW_KeY (edited 10-17-2003).]

Thanks, i'll be waiting for more info.

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" My intention is to " give a different point of view ", not to offend in any way; peace."
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Ok I lost the page that listed everything.. grr, but I'll list what I have there are differences in these motors like crazy!! I know the newer ones (series III) they changed the connecting rods, blower, and TB.

I do believe the series 1 used a different blower from the L67.. and of course like I said internals can't really list it all, its a bunch.. I'll keep looking around cause I had a detailed page that went through it all, but lost it since I formatted the puter heres a list below to show you how much they've changed over the years...

1987 to 1988 Normally Aspirated Engine - 150
HP Vin Code - 3

1988 to 1991 Normally Aspirated Engine - 165 HP. Vin Code – C

1992 to 1994 3800 Series I Normally Aspirated Engine - 170 HP. Vin Code - L

1995 to Current – 3800 Series II Normally Aspirated Engine - 205 HP. Vin Code - K -

Big Brother Versions of the 3800 Series I and Series II Engine (Supercharged )

1992 to 1993 Supercharged - 205 HP. Vin Code - 1

1994 to 1995 Supercharged - 225 HP. Vin Code - 1

1996 to Current Supercharged - 240 HP. Vin Code - 1

Different blower (M62 vs M90), better heads (much like ported S1 heads), better rockers. There are other differences but they don't contribute directly to the increase in HP and torque.

S1 was 225HP/270 ft-lbs in 95 and S2 was 240HP/280 torque in 96. A slight gain. The torque specs vary depending on the publication.

One nice thing about the S2 is the M90 is turned slower so you can crank it up and get more HP. Other than that, the difference aren't all that cosmic.

quote Originally posted by LoW_KeY: Ok I lost the page that listed everything.. grr, but I'll list what I have there are differences in these motors like crazy!! I know the newer ones (series III) they changed the connecting rods, blower, and TB. I do believe the series 1 used a different blower from the L67.. and of course like I said internals can't really list it all, its a bunch.. I'll keep looking around cause I had a detailed page that went through it all, but lost it since I formatted the puter heres a list below to show you how much they've changed over the years... 1987 to 1988 Normally Aspirated Engine - 150 HP Vin Code - 3 1988 to 1991 Normally Aspirated Engine - 165 HP. Vin Code – C 1992 to 1994 3800 Series I Normally Aspirated Engine - 170 HP. Vin Code - L 1995 to Current – 3800 Series II Normally Aspirated Engine - 205 HP. Vin Code - K - Big Brother Versions of the 3800 Series I and Series II Engine (Supercharged ) 1992 to 1993 Supercharged - 205 HP. Vin Code - 1 1994 to 1995 Supercharged - 225 HP. Vin Code - 1 1996 to Current Supercharged - 240 HP. Vin Code - 1

Everything listed is correct except for a few minor corrections.

87-88 engine code 3 is known as a sequential port 3.8 and 150 HP

87-91 engine code c, the first engine known as a 3800 and 165HP

Good luck

Phil

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87 FIERO GT 2.8 5spd
0-60 in 6.8 seconds!
If you found my advice helpful, please take the time to give me a positive rating. Thanks

quote Originally posted by GTDude: Everything listed is correct except for a few minor corrections. 87-88 engine code 3 is known as a sequential port 3.8 and 150 HP 87-91 engine code c, the first engine known as a 3800 and 165HP Good luck Phil

Phil, do you know the difference between the B and 3 engine?

Ok,good info guys,thanks.
Now what makes the NA series II produce more HP than NA series I.Does Series II have differents heads, cam,bigger valves or just the ECM.

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" My intention is to " give a different point of view ", not to offend in any way; peace."
Link to car pictures of PFF members: http://fieroz.com/photo.html If you would like to include your car pic,send it to this email address: webmaster@fieroz.com

The main difference between the original 3800 which was introduced in MY 88 and the earlier engines is the balance shaft. From then until my 95 the differences were incremental. The series II is a different block entirely with reduced height for packaging purposes, higer rpm potential. You can immediately identify a Series II by the aluminum plate on the back of the block behind the flexplate, and also the side bolts for the main bearings. NO previous block used these parts.

Yes, B engine is the 1986 equivalent to the 1987 3 engine.

Phil

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87 FIERO GT 2.8 5spd
0-60 in 6.8 seconds!
If you found my advice helpful, please take the time to give me a positive rating. Thanks

quote Originally posted by LoW_KeY: 1992 to 1994 3800 Series I Normally Aspirated Engine - 170 HP. Vin Code - L

I have a chance to buy one of these already installed. Does anyone have the torque on this one? I am especially interested in comparing this with the 93-95 pushrod 3.4 that I already have in a Formula.

I would think roughly 205 torque?

I know the motors with 205 HP were looking at 230 torque.

can't find any specs online or nothing

Did you use the SEARCH function on this board? I have responded to several threads like this one with a long list of specs and information.

If you want specs on the new stuff try: http://www.media.gm.com/division/powertrain/index.html

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power corrupts. absolute power corrupts absolutely.

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