ok basic info i need to know. 1st ive been looking everywhere for throttle bodies for the 2.8 cant find one. would a 3.1 or 3.4 bolt up to my 2.8? second, would vortec heads fit on my 2.8 if so werent vortec heads only made for the 4.3? not to sure if this would work. most of my mods are going to be top end. no camshaft, port and polish heads and intake and a custom filter assembly. also going for a set of pacesetter headers. i was thinking about going v8 but i dont have the facilities to do that. so im just gonna play with what i got. almost forgot. if i do any bottom end work how far can i bore? i believe the bore right now is 3.5 inches could i take it up 3.75 or 4?

A good upgrade for the bottom end is just getting a 3.4 out of a 4th gen Camaro. Everything bolts up. There are no other heads that fit the 2.8 unless you go with aluminum heads but those require intake and pistons not to mention something fabbed up for ignition. The 2.8 and 4.3 are completely different motors anyways som nothing interchanges. Your best bet to make everything simple would to just P&P the heads/intake and TB for a good growth in power.

The 3.1 or 3.4 tb's will bolt up, but it makes no difference since they're essentially the same. Headers are a good place to start, check out the last page here www.thirdgen.org/techboard/v6/386343-after-market-parts-60-a-2.html (after market parts for 60* motors). The max you could bore it out is .06", boring is meant as way to resurface the cylinder and not so much as a performance mod.

Yeah, the 3.1 is just a 2.8 with bigger stroke, but that would mean getting an aftermarket stroker crank, that a lot of bottom-end work
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In know someone who's gotten about 300 hp out of his 3rd gen v6, but it required a lot of tuning and mods and, yes, a new cam, engine probably won't last too long either, but that's just my opinion, very cool though.

I am looking to try and get around 225 hp out of my 2.8 MPI. Any suggestions guys? I've looked into Universal turbo kit through STS (cause I can't seems to find one for our application), but their like $3K. I've already done all the normal crap (K/N, Filter Box Holes, MSD 6AL Box & Coil, etc). Is going into the bottom end the ONLY next step?

You won't get 225hp naturally aspirated on your 2.8.

I was told the cable mounting on the 2.8/3.1 is different. I know it is on a 3.4 is different. I belive the bolt pattern is different as well.

They are the same bore. But about everything else is different. IAC's, TPS'.

What's wrong with the OEM 3.1 crank?

Oh and a lot of 660s that have been built/forced are or have made over 300 HP and last quite a while. I didn't quite make it there, I was about 250 HP untuned (never was able to get all the equipment before taking it apart) at the crank, and mine held together just fine.

this is a little off subject, but i saw some "electric superchargers on ebay that were selling for about $70, has any one heard about it, used one, or seen on been used?

they are poop... maybe on a tiny honda or somthing might make slight difference.

but at high rpms i bet the fans arent pushing enough air, and the engine will have to force thru it. thus draining power

I remember posting about those electric super chargers a long time ago, and the unanimous (spelling?) response was...They're a joke.

Don't buy those things. They don't work and are a gimmick.

So would you guys recomend a turbo or supercharger? And where can I find a supercharger?

Really the only supercharger are the Faegoel SC. They are out of business and is really rare. There was a guy on here who was selling one not to long ago but wan't able to sell it. Really the only way to go would be a turbo.

Says who? Go talk to firstfirebird, or better yet go do a quick search on 60degreev6.com, many guys are making atleast 250 crank hp n/a.

The throttle hookups are different between the 3.1/2.8, but it does bolt on. Don't know about the 3.4.

I'm thinking he meant that you really can't make 250 on iron heads. There is a guy pushing 300 NA with a 3500 IIRC. 250 with aluminum heads is possible but would be difficult with the 2.8. Look for firstfirebird, he's building a very strong motor.

So no internal(maybe a Cam) whats the best I can hope for HP/Torque?And where should I start(as staed before I've done most of the basic upgrades already)? Heads? Distributor?

The stock heads are your biggest restriction right now. You should research doing a 3x00 top end swap, otherwise it's like beating your head against a wall. You can make a dent, but iorn heads just can't compare to 3x00 heads.

Do me a favor and break it down kiddy style. 3x00?

3100, 3400, and 3500. The 3500 won't work because the bore is different. The 3100 and 3400 are the right heads to use. Get a set from a 99+ FWD vehicle for the larger valves, and they flow better. On top of that get the intake and pistons for them too and fab something up for ignition.

2.8 rs, (i need to remeber the "quote" thing) what would be a good turbo?

Heck if I know. All I know about turbos is that they make the car faster, There are others who know all about turbos. Check the "how to fab a turbo kit" or whatever stickey at the top of the page for some information.

"Basicaly" a turbo charger sucks more air into the engine. More air holds more fuel giving you the hp boost.

If I were to say F*&% it to my 2.8 and convert to a 3.4, and follow in firstfirebirds steps will in bolt up to my T5?

Oh yea KSITH this is your TB that you wanted:
MRZ Big Bore Throttle Body - 60MM or 62MM - 2.8/3.1 V6

Yes it will bolt to your t-5.

Selecting a turbo is a little more detailed than finding a 'good one'. It needs to be the proper size for the amount of power you want to produce, the rpm you want it to occur at and it's intended application. There's a decent tutorial of the basics of turbocharging at www.grapeaperacing.com in the tech article section.

Any Idea on if the 4.3 bolts up to to a t5? I've seen superchargers for 4.3 for a reasonable price.

90deg engines will bolt to most 90deg bellhousings and 60deg v6's will bolt to 60deg bellhousings. The 4.3 is a 90deg engine.

T3 is a good 1. stay away from diesel truck turbos. feed your need for turbo knowledge @ http://www.homemadeturbo.com/tech_pr...ech/index.html

Getting very close to 350 crank HP N/A here.. almost 300 WHP.



a 3400 SFI top end swap with a cam will get you close to your goal. Stroking it to a 3.1 will help out a bit as well.

hey if your looking for 2.8 performance stuff, ive got a set of custom heddman longtube headers im trying to get rid of ,they have never ben installed an i sprayed them black hight temp 1200 degre ceramic paint , they have a few scratches but are in excellent shape, still in the originall box, i paid 300 2 years ago for them ill let go for 150 plus s&h unless youde prefer to pick them up , i can email you pics at request , i cant figure out how to load them on here , oh i also got a k&n air filter for a 2.8 ill let got for 15 plus s&h its got less than 2000 miles on it freshly recharged to
i was going to use this stuff on my 2.8 but i got a hell of a deal on a sweeeet 350 so i went for more of that ground trembling sound, lol

OK I can see the ones on Ebay are a joke. 1-3 psi? Please. But has anyone seen these:

http://www.electricchargers.com/?gcl...FQgYegodAUgv-g

They look the same, but these say they're fully adjustable and go up to 8 psi. Probably same company, but selling their low end stock off. Just a theory. But these come with a EPROM Chip too. Anyone have experience with the ones from the website? An ACTUAL experience?

BTW these are a sponsor for the website. Just check out top of page.

OK So from what I've been able to find is there's only one electric super/turbocharger on the market that works. Your can find it here:

http://www.boosthead.com/home.php

It's only for drag is the problem though. Not a application for constant use. Says can it can be used on daily drivers if you don't mind carrying around an extra 90 lbs or so. Not really for me, but you guys might be interested.

Link updated

Link don't work kscamaro89. I wouldn't buy an electric suercharger until I saw the dyno charts to prove it.

Sorry bout that 2.8 RS. Link is good to go now.

$2500 for a motor attached to the compressor side of a turbo?

It's better than a leaf blower I guess

forget the turbo/supercharger and motor work. if your looking for the best bang for your buck you want 2 words..wet nitrous. your stock bottom end might not like it that long if you run a big shot/spray a long time but it would be a good learning experience and its pretty much the fastest way to make power. Start with a shot of 50 hp

OK so I'm finally starting to get what cross's over when I come across this webpage:

http://en.wikipedia.org/wiki/GM_60-D...ne#3.4L.2F3400

Now I'm no engineer, but I don't think some of these will bolt up to a T5. Or am I incorrect? Cause if I can get a LQ1 (Dual Twin Cam) DOHC 3.4 to work in my car then all my problems would be solved with an engine swap.

What's wrong with diesel turbos?

You can swap a DOHC 3.4 into your car, it's been done before.I forget what his name was, but someone on here had done it and called their car 'elanore' or something like that. If you do a search you should be able to find something about it.

These engines will put up with a 100 shot of nitrous, maybe more with some of the electronic gizmos out there. But for reliability the best idea is to build it up.

there's nothing "wrong" with diesel turbos, but were talking about a 6 cylinder. diesel turbos are big, and i don't think the average 2.8 could really make good use of one.

ok i cant find any info online so i'll ask here. anyone know the valve size intake and exhaust for the 2.8, 3.1 and the 3.4 heads. also whats the combustion chamber size? i was thinking about porting and polishing my 2.8 heads and increasing the valve size and combustion chmaber size. but if its cheaper to just buy a set of 3.1 or 3.4 heads im gonna go that route. i'm also gonna go ahead and custom make a uim. i have an idea that will most likely increase flow.

2.8/3.1/3.4 heads are all the same. Early 2.8 heads are smaller, I believe 85 and earlier. After that they are all the same.

Intake valve is 1.6" exhaust is 1.3". Porting iorn heads is really a waste of time. Why would you want to increase the cc size? That would lower the c/r. You should look into a 3x00 top end swap if you really want better heads.

thats what i was wondering. how involved would a 3.4 top end swap be. im not new to engines and i found a garage i can work at. just gonna cost me 3 dollars an hour for a flat bay and 4.5 for the lift bay. still cheaper then having someone else do it eh.

you need to search the site for "firstfirebird"

That guy is doing it now. The only hard part is making an ignition system work. If you use a 3.4 froma 4th gen, you have a place for the crank sensor. The 2.8/3.1 engines use a distributor. You can't use a distributor with the 3x00 top end swap. So......

You'll need a 3x00 complete top end, wiring harness and ignition coil pack set up. You'll need wiring diagrams, and the PCM from the 3x00 car as well.

You'll also need lots of patience!

You can do it, just don't give up.

You mean a 3400 top end. 3.4 refers to the iorn head 3.4, 3400 reffers to aluminum head fwd engine. Depending on the year of your car you'll want to switch to a better ecm as well because there's not much info on the maf ecm's.

so is there any way to make the 2.8 throw down 200 HP with engine mods alone.. Nos is the anwser for us v6 ers because putting a turbo or a supercharger is jsut too much money and it will take too much time and in the end you still dont have that much power. I think a wet shot of nos right into the intake is the easiest method cuz it will take less than 2 hours to install an you gain 50-75 hp instantally

N2O is the fastest and easiest way to get power but you really should tune for anything above a 50 shot and you can easily fry your motor with stock internals. For 200 Hp get a cam, port the heads, and get some new pistons to bump up compression a little bit.

N2O isn't for a daily driver though unless you've got a built up low end. I've had a ZEX kit for a 1 1/2 yrs and I personally won't do it till I go through the whole engine. Just my 2 cents. Oh yeah you could mill the head too.
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This is there search I am on too. I have talked to ALOT of people including 2.8RS and it'll be a little $$$, but MIGHT be possible. To come close is real posiblity and more in my pocketbook range.