I have a 98(I believe) 3800SC series II and the exhaust manifold on the backside(in the Fiero) is cracked. I have been looking today at a local junkyard and found 3 engines but the EGR was on the same side I need and the one I have, the EGR is on the other side.

I thought they were all the same. I dont know what model car my engine is from so I dont know what car to be looking for.

Any ideas?
EDIT: I just looked at the engine again and it has "3800 Series II" stamped on the block.

If the 91 manifold will not fit then they were wrong about the year of the car or I dont know what I have on there. Its the rear manifold and has nothing hooked to it,o2 , EGR or anything else.

Thanks, Steve

[This message has been edited by JumpStart (edited 12-27-2008).]

Just to be sure I understand you problem.

You need an exhaust manifold for a SC3800II conversion. The manifold you need is the one closest to the rear window.

You went to a local yard and found three SC3800II engines, but the exhaust manifold closest to the firewall on those cars had the EGR on them?

If that is the case, then get the front manifold (the one without the EGR) off of the junked car, and install it on the firewall side (the one without the EGR) of your engine.

The series II 3800 engines as well as the series III all have the EGR on the same side it is the series I's that moved it around.
For the series II there is three different manifolds for the rear side or in our cases the trunk side.
The 96 ones have smaller diameter out put for the exhaust and a different down pipe. With the 97's the location the out put pipe goes is in a different location then the 98 and newer ones which for the 97 and newer if your exhaust is already made up you need the proper one but if you have not built your exhaust yet any 97 and up 3800 SC or N/A manifold will work.
Easy way to spot the difference is the O2 sensor is between the two pipes on one and lines up with one of the pipes on the other. Dan

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Signature compliments of F-I-E-R-O
2003 3800SC series II powered
www.photosled.com/showgallery.php/cat/631
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The alignment of the downpipe outlet is determined by the car it came off of not the year. Also the 96's had smaller downpipes, but the manifolds are the same diameter.

The rear outlet on hbody's are more offset to the center, and wbodies are more offset to the left.

This is true for all series2's.

If you have trouble locating a stock series two front exhaust manifold, you might want to consider replacing it with a ZZ Performance powerlog that will be an upgrade as it flows better.

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87GT - 3800SC Series III engine, 3.4" Pulley, N* TB, LS1 MAF, Flotech Exhaust Autolite 104's Custom CAI 4T65eHD w. custom axles, HP Tuners VCM Suite.
87GT - 3.4L Turbocharged engine, modified TH125H
" I'M ON THE LOOSE WITHOUT THE JUICE "

I agree on the power log it is a direct bolt on and a large improvement over the stock manifold. I have used a few of them now on both series II and III engines with no problems at all.
I have yet to have a problem with any parts purchased from ZZ performance. Dan

It seems that a 91 Buick Regal has the front (back on the Fiero ) exhaust manifold I need with no o2 sensor or EGR.

If this is the case, you could use this front manifold and the rear from the other cars I had looked at with the EGR in the front (not sure the make/model) and would require no plugging of the deleted EGR hole.
Just a thought.
Steve

If the 91 buick manifold fits you do not have a 98 series II engine yours is much older then that most likely a 92 or 93 engine which is a lot less power then the series II for the amount of work it is to do the swap. Dan

any way to check the block? I know that it is a series II charger on it.

Thanks, Steve

block has series 2 stamped right in it.

Are you sure it is a series II SC not a series I SC, quick way to tell the series I from series II besides the SC is the exhaust manifolds on the series I you have two spark plugs side by side between two of the exhaust ports and the series II have evenly spaced ports. Dan

quote Originally posted by FIEROFLYER: Are you sure it is a series II SC not a series I SC, quick way to tell the series I from series II besides the SC is the exhaust manifolds on the series I you have two spark plugs side by side between two of the exhaust ports and the series II have evenly spaced ports. Dan

I just looked at the block again...it has "3800 Series II" stamped on it.

Maybe the guy at the junkyard had the year wrong on that Regal but the front manifold on it had no o2,EGR or anything else on it like the cracked one I have. The other 3 cars I had looked at had the EGR on the front manifold and the o2 on the rear one.
Steve

I am still confused on the engine that you have. I have seen series I and series II supercharged engines. Could you post a photo of your engine?
Here is a photo of a S1 and S2 blower.

S1 is on the top and S2 is the lower .

Heres one view from the top.



It is a series II

quote Originally posted by JumpStart: I just looked at the block again...it has "3800 Series II" stamped on it. ...The other 3 cars I had looked at had the EGR on the front manifold and the o2 on the rear one. Steve

You do realize that in the production cars the SC3800II come installed in that the front manifold (the one closest to the radiator) is actually the rear manifold (the one closest to the firewall) when it is installed in the Fiero, right?

The pic you posted is of a Series 2 engine.

[This message has been edited by topcat (edited 01-04-2009).]

quote Originally posted by topcat: You do realize that in the production cars the SC3800II come installed in that the front manifold (the one closest to the radiator) is actually the rear manifold (the one closest to the firewall) when it is installed in the Fiero, right?

Yes...Thats why in my previous posts I kept referring to front or rear in a Fiero as opposed to the donor car.

Unless you are turning the engine around, the front manifold on a production car is still the front manifold on a Fiero. The front of the Fiero is the firewall side. The rear of the Fiero is the trunk side. I think this is why some people were confused by your post. If it is a Series 2 engine then only newer 3800 would have the manifolds you need. A 1991 would definately not have the same manifolds, as everthing before 1996 was series 1 and had different exhaust ports.

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11.425 @115.60
Best 60' 1.543 seconds
3800 S/C 4T65E

so THIS^ really fits in a fiero? it looks HUGE. Do you have to tilt the engine or will it sit just like that?

Yes, it will sit in there just like that. No problems. Room wise,the only problem is with some of the alternators not quite clearing the deck lid on the fastbacks. From what I have read, you can either notch the deck lid on the inside or move the alternator to the power steering or A/C location.

Steve

quote Originally posted by red84fieroman: so THIS^ really fits in a fiero? it looks HUGE. Do you have to tilt the engine or will it sit just like that?

Only if you cut the frame rails, mount the water pump thru the fender well, use an adapter and .....Wait-That's for a V-8!!!!!!

The 3800SC fits into the Fiero like it was made for it.

The series 1 and series 2 have the exhaust ports in different locations, they wouldn't even bolt up. Series 1 have 2 spark plugs between 2 of the ports with un-evenly spaced ports,series 2 have 1 spark plug between each port - equal spread between each each exhaust port.


Series 1 head:


Series 2 head:

quote Originally posted by MstangsBware: The 3800SC fits into the Fiero like it was made for it.

Eh, I would say that it fits better than if it was made for it.

There is really tons MORE room in the bay with any variation of a 3800 in it.

quote Originally posted by LFiero67: The series 1 and series 2 have the exhaust ports in different locations, they wouldn't even bolt up. Series 1 have 2 spark plugs between 2 of the ports with un-evenly spaced ports,series 2 have 1 spark plug between each port - equal spread between each each exhaust port.

They are series II heads, evenly spaced with one spark plug between each port. The trunk side manifold in the Fiero has the EGR and o2 sensor and the window side manifold (which is the cracked one) has nothing on it at all.

Steve