What year and make 2.8L came with al. heads?

 

correct me if i'm wrong, but didn't only fwd 2.8's come with aluminum heads?

 

Whats the difference in the FWD and RWD 2.8L?
Are the heads interchangeable?

 

ive heard of someone modifying fwd heads to work on a rwd 60* engine, but its something i wouldnt attempt to do.. if u really want alluminum heads, check out http://www.engine-parts.com/GMV6/28strokergpl.html


-mike (loomdog)

 

They wont work with our intake manifolds- MPFI

 

Will the heads and intake off a fwd fit on a rwd block?

 

yes and no, they will fit the block, but thats it

in short, dont bother with swapping parts from RWD to FWD 60*V6 and vice versa because most parts wont interchange

 

What if you took everything from the heads, computer, harness everything from a fwd and swapped it on to the rwd block?

Aren't these two engines very similar?

 

i'll let you think about if its worth the hassle or not


with a FWD intake, there will be no distribuor hole
the FWD intake would have to face the rear of the car- think about the way the FWD 60* V6's are set up
so you would in fact have to swap over the entire harness and DIS

you'll also need to custom fabricate exhaust manifolds or headers, because i believe the FWD heads are angled differently

you also need to figure out if you will have adequate compression, i believe the FWD heads use a larger combustion chamber......(not sure, somebody please correct me on this if i am wrong)

hey- if you have unlimited time and money- ANYTHING can be done
doesnt mean its nesacerally worth it though

 

the external blocks themselves are slightly different also
the FWD block has its starter on the opposite side (as compared to the RWD block) to clear the transaxle

also the motor mount mounting places are different, because the FWD engine uses dog-bones, where as the RWD engine used conventional frame mounts

 

Yep, teal is right... the throttle body would be against the firewall, and you would have to convert the entire electronics as well. Before going to all that trouble, go get you a set of Iron 2.8 liter heads from the junkyard, have them ported and worked over, then drop them on. It would save you money and time, if you are wanting more power. Just my advice.

 

well if people would read the discriptions, they so say that they WILL WORK WITH RWD blocks. BUT< you have to use a different intake system, Look on the next page for that.

 

? I thought thats what I said -"Won't work with OUR intakes"

Anyway, If anyone is curious, Supersix has completed their GM 3.4 performance package for $1700 but that includes a ported 3.4 intake manifold and cam with the ported heads.

They are offering the ported heads alone for $850 per pair which includes a $100 refundable core charge and free shipping anywhere in the U.S.

The 1.8 intake valve modification will be an extra $200 per pair option.

They are currently looking for anyone that will assist in dyno testing of the complete package and will sale the entire kit for half price if you want to be a test guinea pig.

 

what do the flow numbers for the heads look like?

 

This chart is without the larger 1.8 intake valves so flow will be better with them.

http://www.supersixmotorsports.com/PDF's/93-95GM3.4PowerPakDataSheet.pdf- This isn't working, let me link another page and them click on '93-'95 GM 3.4 on the left hand column. It will load a PDF file.

http://www.supersixmotorsports.com/

 

well, i just put it all through dd2000 for kicks:

201HP@5000
232ft. lbs.@4000

 

i should add thats with a 3.4

so thats 40+HP
and 30+TQ.

 

That'll beat the crap out of a heavier 305 v8 car.

 

if its stock and non-TPI, yeah it'll be close
it'll prolly be a mid 15 sec car, cuz those numbers are dead on to the newer 3.8 V6 f-bodies

 

I have a high 15 sec- 16.0flat car right now as I stand with a fairly stock 2.8 in it but have a fully modified drivetrain and suspension. I should plug into the 14's when I get this 3.4 done with all of the extra goodies I have- Just need smog legal full length headers.

 

unless you have a factory freak,
you'd be lucky to pull a 16.5-16.9 stock
times are usually in the low 17's

 

Quote me correctly or please don't quote me. I stated "fairly stock" wink,wink. Plus the drivetrain is fully modified which includes a full race trans- not the stock POS. It puts what power I do have to the pavement properly. The 2.8 in it now is also a brand new motor (not rebuilt) that has less than 20K on it with a few goodies bolted in it.

 

would you mind telling what kind of "goodies"?

 

Custom windage tray and baffles in the oil, pulleys,roller rockers, bumped up fuel pressure, stock headpipe reworked, high flow cat and catback, 178* running temp(Still remains in closed loop)w/ custom radiator, high flow MAF, heavier flexplate, Camaro dualsnorkol airboxes cutout, full aftermarket ignition includung 10.4 taylor wires... where do I stop... it has the best of everything for a fairly stock 2.8. The 3.4 will have fully ported heads, fully ported plenium & manifolds, 62mm TB, aluminum 1.6 rockers, and (Praying) smog leagal headers someday- if not i'll just have to throw in one of my two full length header sets and blackmarket smog it(The only reason I haven't gone this route is because I did this with the Vette in the late '80's and then lost my connections for blackmarket smog because things got real sketchy here in Calif. around that time. The car sat in my garage till '93 an only saw track time.

Don't know if I have ever mentioned it but this is the wife grocery getter and she likes zipping around town in her little hot rod. Alot of you guys I'm sure think I'm arrogant because I'm a little older than most here (36) and have a little bit of money because of my age to tinker with cars more than most of you- most of you will be able to more also when you get older if you still choose to. With that said, I promise all that I am the most diehard V6er on these boards----why?---- because I could easily afford to buy a V8 car but choose the V6 because it is different, rare to hotrod, and lightweight so in corners on rails and stops fast.

 

ok, now i have an easier time believing low 16's

 

A 200hp 3.4 with a 100 NOS shot would kill.

 

yeah it'd prolly see low 14's then

 

Yes, 1991teal.. is O.K.

I' ve a FWD 1988 2.8 V6. (Chevrolet Celebrity Eurosport)

Stock engine have:

Aluminum heads, large intake valves, polished ports, good heads/intake ports matching, stock compression = 8.9:1 with dished piston (it can be 9.5:1 with flat top pistons), double roller timing chain, aluminum intake manifold with 6 holes for injectors (MPFI), electronic ignition module with 3 coils (distributorless), with MAF and MAP (updated to Speed Density at the factory), a 1227730 ECM with a spark advance table similar to Camaros and Firebirds.

Into a RWD car the exhaust will be at the passenger side. the air intake will be to rear, no hole for distributor and the coolant connections will be in direction to the driver's front wheel (you will needs large coolant hoses to the radiator). Finnaly, I don't know how could be the engine wiring harness changing the engine location.


Regards,

Denis V.

 

BUT

you CAN turn the FWD intake around. and the distributor hole IS there on the block, its just got a plug. its tapped for the hold down and all - just drop it in and go. dunno if anyone has checked but the distributor on the 2.8 MPFI goes straight into the block, not thru the intake(got 3 of these motors sittin in the garage). the exhaust manifolds or headers from a RWD 60* motor WILL bolt on and work.

therefore, if you use the FWD aluminum heads, the FWD intake(lower and plenum), throttle body, valve covers, and rails with injectors, you can make it work. and work with your stock wiring. you may need to swap some sensors on the TB - but i doubt it. and just plug the injectors in the right plugs on the harness and away you go.

now, you MAY run into a little crap with accessory drive belt gettin in the way of the thermostat housing, but im not sure of that.

what i'm doing is using a FWD 3.1 and converting it over to use in a RWD, by turning the intake around, and using the water pump, timing cover, and accessory drive from a RWD camaro 2.8 motor.

IF you have a T5 in your car, you could even just drop in a whole front wheel drive motor(with your distributor, sensors, accessory drive, oil pan, the intake flipped around) - the bellhousing is all set up and ready for a drivers side starter - someone at GM was thinkin ahead there.

if anyone wants any pics of the motor with the intake rotated, where the distributor goes in the block, hell if you want ill even throw a distributor in there and take pics. but it can and has been done before.

in fact, here's some pics of a 94 camaro where he used the later 3100 FWD heads and intake on his 3.4 RWD block

http://camaro.adwire.com/engine2/engine.html

 

Can't get away with that setup here in Calif. We are suject to a visual inspection as well as emission test-- The 2.8 MPFI has to be there.

Yeah I know some things really suck living here.....But you must remember, we can go surfing and snowskiing in the same day

 

all we need to do in ohio is the sniffer - they arent even allowed to ask if they can look under the hood. the farthest they are allowed to go is to use a mirror to look for a cat.

thank *** on that - my lumina used to have a little 3.1 - now its got a dohc 3.4(now - someone should put one of THOSE in a camaro! )

oh ya - on that 94 above - its got the 94-up 3x00 intake. the earlier 2.8/3.1MPFI FWD intakes are a little different, mainly the thermostat housing is all the way over to the left of the intake base - not in the center like his. the TB still exits top front and center of the motor on the 2.8/3.1 intakes. hell if you wanna try it that bad theres a grand prix in the yard here that i could snag all the stuff off of. i believe with the fwd heads your compression will jump a little too.

 

Yes, the distributor hole is on the block. I can see it. Only is covered with a seal and a litlle bolt. No a big deal to open this hole.

My 2.8 intake manifold is bigger than the 3.1 shown in the picture: The passenger side runners (air passages) continues and finish over the head. It's very difficult the valve adjustments whit this strange design. I don't know what was the GM idea with this 87-89 2.8L intake manifold.

 

Do I ever second this comment. This motor is the biggest pain in the *** to set the valve train. Rocker oil splash tabs will not fit under the manifold with the motor running.

 

ya all the gen1 mpfi FWD 60* motors were like that(2.8 and 3.1).

last time i pulled a head for repair on a 3.1, i didnt touch the rockers. left em on the head, left the pushrods in the block, and when i was done i just sat the head back on and got the rockers back onto the pushrods as i set the head down.