MPFI 3.4 crate, all I see are truck carb crates online.

MPFI 3.4 crate, all I see are truck carb crates online. Lot of good deals out there on 3.4 crates but all of them say for trucks and for carbed motors. I can assume they have the wrong cam for the MPFI and would the number they claim for power go up or down with a MPFI. would anything else be different in the motor, if its made for carbed???

im will to spend the 2grand but I want it to drop right in. well; for the most part

 

Come ON!
What engine do you think I have used
TWICE!!!!
I used exactly what ya are reading.
IT'S THE EXACT SAME THING IN THE CAMAROS/FIREBIRDS
AND I EVEN PASS CA SMOG TESTING WITH IT.
Notice the copy states not for CA vehicles?
BECAUSE GM WOULD HAVE TO SPEND MONEY TO SAY 50 state legal.
INSTEAD, ya just say (like I do)
NOTHING!
What other questions ya want answered?
Happy to help ya get more power & spend money!
BARGIN FOR THE ENGINE FROM YOUR LOCAL DEALER.
WALK IN WITH $1600 cash & say I want to buy this engine. NOW. Sale price includes state sale tax. Here's my vehicle to dump it into the back trunk!
Honest, it's exactly the same thing in F bodies.
Honest.

 

Karl, you used a truck 3.4? I'd think Gumby's right, the cam would probably have a different grind, one for low rpm torque, instead of high rpm horsepower (street car)...?

 

i'm reading a pace parts catalog and it says it will work on mpfi it even comes with a new ecm

 

Tom, I bought 1995 Camaro 3.4 for my 1985 truck swap.
I bought a 1995 Camaro 3.4 for my 1985 Firebird swap.
I am using the exact same 3.4 engine(s) as described in the GM Perf Parts catalog.
That OTC crate engine is the 3.4 from the F-body car assembly line.
GM would not make a single change for this engine.
It's an orphan engine.
3.4 RWD version is NOT USED IN ANY CURRENT GM PRODUCTION LINE VEHICLES.
Nor will it ever, I'll bet.
From now on, 3.4 long blocks only sold OTC or thru yards as a core.
No cam change at all.
And I will pass CA smog with my 3.4 swapped Blazer with ease!
I promise I'll tell everyone here ya can swap in a 3.4 & almost be guaranteed passing a smog test as tough as the CA smog tests.

 

Anyone know the stock cam grind(Int"?/Ext"?)for the stock 3.4's that cam in the 93-94 camaro's?

I'm curious if they used the same .262"Int/.273"Ext that the later 2.8 and 3.1 motors used in the camaro's.

 

in the gmpp, it lists specs for the 3.4 HO cam. this is what your looking for.

 

60* cams
2.8 Carb
for Citations, F bodies, Luminas & such is same cam as in the S-10 Truck series.
2.8-3.1
Cam for Citation HO - X-11, MPFI F-Body MPFI Luminas -same cam
2.8 Trucks TBI got something left on GM shelf, probably old carb's cam version.

3.4 cam is more aggressive.
valve lift (I/E) .427/.454
duration 204/216
lobe is 107*
Crane cams designed it for GM

 

It appears then that GM's 60*/V6 performance crate motor--the "HT3.4" is just a stock replacement motor for the 93-94 Camaro and it is offered as a performance upgrade for the older 2.8 truck motors.

I never realized that the cam profile offered in this "performance crate motor" is not actually hotter than what is already in a mass production street 60*/V6. I thought this motor had a little more umph that a stock 3.4, guess I am wrong.

 

someone the other day posted some good engine places. and they had soem good crate engines for under 2grand, about 2 with shipping. but they all said. 80something to 85 carbed truck.

two ones I found with a reasonable price.

I have no idea what GM offers on their site, I can only assume it too much from them direct.

http://www.goautocenter.com/34l__v6.htm

NEW 3.4 LITER/210 CID ENGINE REPLACES 2.8 LITER IN 1982-85 TRUCKS. 49-STATE LEGAL

ENGINE FEATURES:

100% New engine, emission legal (49- states) This 3.4 liter, 60-degree, V-6 is designed for 1982-85 S- trucks originally equipped with 2.8 liter V-6 engines. This engine includes a nodular iron crank, forged rods, 9.0:1 compression ratio, cast pistons, hydraulic camshaft, 1.72" intake valve, 1.42" exhaust valve, oil pump, oil pan, intake gasket, valve covers, harmonic balancer and flexplate.

*Optional 2 Year or 24,000 mile parts and labor warranty is available for purchase.

NOTES: This engine requires an electric fuel pump. 4-wheel drives will require a new oil pan and pick up screen. Manual transmissions require a flywheel and hydraulic clutch. Reuse existing manifolds, ignition system, emission system and water pump from original 2.8 liter engine. Installation instructions are included with engine.

-------------------------------------------------------------

http://www.sdpc2000.com/cart.asp?act...id=120&pid=116

"Upgrade your tired 2.8 V6 with the bolt in HT 3.4 replacement. Designed for the S-10 ("82-"85) and Blazer, the HT 3.4 is the best thing going. This engine meets 49 states' emission standards and with 194 ft/lbs of towing torque the HT 3.4 will make your truck feel like new and pull loads better than ever."
Horsepower:
160hp @ 5,000 rpm

Torque:
194 ft/lbs @ 2,700 rpm

Compression Ratio:
9.00 to 1

Block:
Cast Iron, 3.620" Bore

Crankshaft:
Cast Iron, 3.310" Stroke

Heads, Chamber Size:
Cast Iron, 3.4L, N/A

Valves (I/E):
1.720"/ 1.420"

Camshaft, Lift (I/E):
0.427"/ 0.454" Hydraulic

Dur. @ 0.050" (I/E):
204/216 degrees

Intake:
Not Included

 

How about these people

here's another thing, sincce these motors are being advertised as 2.8 replacements, what hp & tq increase would there be when hooked up w/MPFI?

 

Doesn't work that way.
The person writing copy for the brochures (any of them) all uses the same provided by GM specs.
That's the way it works.
And the advertised specs are from the 1993 SAE testing session for 3.4 SFI HP/Torque figures.

I am going to prove the copy wrong by having this 3.4 mill pass with ease the CA smog test.
And I will post results, too.

It comes down to a fine hair, I do always say I have a 49 state S-10 Blazer version.
It's true!
Open door & there's a tag from VIN tag from Alabama Highway Patrol.
Couldn't care why it's there.
I've owned this truck this way for 12 years.

 

same thing, as th two above. but it even says " This is for engines with carburetors only, not released for TBI usage."

Tired of that tired 2.8 V6 in your S-truck? It's time for a major upgrade, GM Performance Parts style. The HT 3.4 is a bolt in replacement for the 2.8 V6 in your 1982 - 1985 S-10 pickup or Blazer with automatic transmission. And it's emission legal in 49 states (Yes, you guessed it, California said no.) But for the rest of us, the HT 3.4 is the best thing going. With 160 horsepower and 194 Ft. Lbs. of torque your truck will feel better than new, and tow better than ever. The heads have large 1.72" intake and 1.42" exhaust valves and combustion chambers that yield a healthy 9 to 1 compression ratio. The camshaft is a high lift, short duration design, developed to produce lots of strong low end torque and mid range horsepower. With .427" intake and .454" exhaust lift, the cam ensures a strong pull to 5000 RPM. Doesn't sound like your 2.8 V6 at all does it? It isn't, when GM Performance Parts develops an engine we focus on making power. But not power for the sake of power, but power where you need it. For great drivability, towing performance and maybe even a little off road fun. The HT 3.4, a serious upgrade for your favorite little truck. With 40 more horsepower than your 2.8 V6, why would you even consider rebuilding that old 2.8? The induction system, ignition system, exhaust, emission controls, water pump and other parts required to bolt in your new HT 3.4 are already on your truck. Sounds like a weekend project or talk to your GM Performance Parts Authorized Center, they can install it for you.

Technical Notes: This is for engines with carburetors only, not released for TBI usage. This engine does not have a clutch boss on the side of the block for standard transmission application.

 

don't believe everything you read.

 

So GMpartsdirect.com is lying??? im sure you know more than GM??? go smoke another one. If they say its only for carbed, thats what it means. it has the wrong cam and **** for MPFI /TBI

 

I dont want no 82-85 truck 4x4 crate engine, that all wrong for a sports car. you can put one in your car if ya want, Ill buy a used 3.4 4th gen motor first.

 

If you're around in a few more months, you can read the results of this 3.4 swap CA smog test in the Blazer.
I passed my CA smog test in the 3.4 Firebird with flying colors.
Again, all anyone is inputting is the same copy provided by GM in their publications.

Again, I've got these same engines you are reading about.
Honest, I wouldn't BS anyone here.
I don't need aggrivation.
AND several here have seen my swap projects too.
Especially the Firebird.

Why do you think I seeked out my option (used running low milage complete engines)?
I pay less than 1/2 price of the OTC engine & I get more stuff in deal.
And it all works perfect in my CA Smog legal swaps.
Carb platform or MPFI.

 

I know what you mean it will work but its built for trucks. I dont care about any smog stuff, i want a performance 3.4

a truck one will work but it was designed for carbed trucks/ 4x4 not hi reving sports cars. When the designer sat down to pick parts and make a crate they were thinking trucks. hwn it hit the dyno the number they were after were for trucks. I want a performance 3.4

dont the stock 3.4 aro have like 200hp stock?????

 

ive spent 2 moths retunning an s10 with a 2.8 that now has mpfi. it was a carb motor and let me clue you in. the engine will run dead *** lean.i kow the ecm your dealing with the 1227302 how about this a screen shot of the ecm fuel table im calling

 

Okay... listen... I have already done this engine swap, I have a GMPerformance HT3.4 on my 88'bird... I put all of the fuel injection stuff from the 2.8 on it... it runs great...NO PROBLEMS WITH THE ENGINE...again here are the specs for the cam that comes in this crate motor

My camshaft: V6/60° - Camshaft - Performance flat tappet hydraulic camshaft used in the new 3.4-liter engine conversion package (P/N 12363230) and is also applicable to 2.8-liter and 3.1-liter engines. duration: at .050" lift (intake/exhaust) is 204/216, while the valve lift is 427"/.454". The basic RPM range is 1500-4500, and the lobe seperation is 107.

I love this engine it does make a great replacement for your tired 2.8 ... just like GM advertises...

 

so you got a better cam with it??? do they install it in the crate??? arnt most crate warranties void as soon as you open the motor up???

another reason I want a new crate, I want a warranty and dont want to void it putting on MPFi or changing the cam.

 

How do you bump the air/fuel ratio on the computer to even it out? I'm assuming this can be done with the prom?

I've heard that if you add larger injectors or bump up the fuel pressure, or both that it will only rich up a full throttle. Is this true?

I'm also going to add an air/fuel ratio gauge to my O2 sensor routing the gauge into the dash so I can monitor changes when I start to do engine mods.

 

Hey Gumby...

go to www.sallee-chevrolet.com
the GMPerformance HT3.4 (P/N 12363230) comes with this cam (P/N 12363220)...

 

the 3.4 HO cam is already installed in the crate motor. it is the "hottest" cam that gm offers for the engine in the gmpp catalog.

assumes KED85 voice- "Pick up the GMPP catalog, best $6 you'll ever spend"

 

Mine will be here next week.......... I got it thru GMMP

 

the engine is the same at every site, and they all say the same thing

"This is for engines with carburetors only. It is not released for TBI usage."

which mean all of you voided your warranty soon as you stuck your mpfi on there.

I want a warranty. I bet you gotta let a GM dealer inspect the car befor you could send a blown one back. soon as they see your mpfi they will point you too the door.

If im gonna spend that much I want a warranty that wont be void soon as I stick my mpfi on there. Ill buy used first.

 

I have 30 day warranty on my used long blocks. I return to the yard & he sees my work.
Haven't been back since I got them.
The same engine is in the same F body is the same engine they sell as the crate for the S-10.

Ask the Parts counter guys for the GM Warranty phone number for OTC engines.
Discuss your concern with them.
GM is only releasing & writing copy, WHAT THEY CAN LEGALLY SAY, when the testing was done.
When this engine was released, there were NEW 1993-95 3.4 Camaros on the sales floor. Would you write saying a brand new car, new motor is gonna blow, here use this when that happens?
Feel like a secure shopper investing in that vehicle?

Ask about the warranty if you install it in your 19xx year vehicle.
PS buy it used low milage.
All ya need do is rebuild guides on the heads. That part wears quickly.

 

I want the 24,000mi 24 month warranty they offer with it or im not buying new.

Ive never spent 2grand on a whole car let alone 1 part. most Ive ever spent was 1,100 and that was on my motorcycle.

im a cheap bastard

 

what about the far side. anyone make a race engine 2.8-3.4 banded in 39 states

 

Interesting Ked, no one seems to listen.

The engine that is listed truck only is the same I know because I bought one for my S10 "TBI" blazer. The funny thing is..... when I got the engine "same freaking part number" it came with a Fbody oil pan and timing cover from the factory, through the Chevy dealer. I dunno maybe chevy finnaly figured out that theres more intrest from truck guys wanting a "little" more power then from car guys and decided to to do a truck setup instead. $$$$
As far as induction goes, its your choice they cannot void any warenty unless the induction system is actually a power adder AKA blower/supercharger. LOL thats like saying GM is going to void a persons warenty on a 70 truck because they took the Qjet off and opted for a Holley.

 

goto www.winaldl.webhop.net and download the scanning software. make a cable as well. take some scans of the MPFI with the 3.4 im sure it will have BLM's in the 150 range. yet agian i am replacing your speculation of the actull function of your ecm with actul knowledge of your ecm. im sure you are lean especiall at WOT. the injectors on teh2.8 just dont flow enough fuel for a 160hp 3.4 liter engine.not to mention that the lv8 vs pulse width table isnt scalled for the fuel demands of th engine either.it might run it might feel like its running ok but i doubt its running anywhere nears it potential.

 

That's why I suggest strongly, obtain the 3.4 injectors.
It's a wise, very wise way to finish off the swapped engine package.

 

I have bought bigger injectors a while back that I ll be using on my 3.4

 

Will larger injectors and higher fuel pressure fix this through the pedal range as well as WOT? or does it have to be corrected in the prom chip?

 

Did you ever try one of those DOS scanning programs? The laptop I have is ancient (bought 5 years ago for $60, it's a 386sx16 with 1 MB of memory!! ) and can barely run Windows 3.1, let alone 95 or 98. I'd like to think that the same cable I'd make for the winaldl program would work on other programs... true?

And I imagine the "only for use in TBI trucks" is because of emissions regulations. There might be a problem with selling that motor for multiport injection, or the Vortec CPI injection, and the federal government's standards for emissions. Or it might not even be the whole United States, but just for California. Don't forget, we use everything, including the intake, from our cars, for the 3.4 swap. Just like moving from a Qjet to a Holley...

 

tech@goautocenter.com wrote:
>
> If the fuel injection/ installation causes the failure of the engine it will
> void the warranty. This engine is not designed to work with fuel injection.

 

wonder how it actually is deseigned not to work w/fuel injection might just be better off finding the boneyard 3.4 & rebiuldw/forged pistons & whatnot for maybe even less.

 

... or build a 350 for 2000 dollars...

that way you know exactly what's in it... your own hands did the work, and your own eyes are your warrentee...

1500 dollars is my spending limit on my 350, and it will run at least 13's before I hit that barrier...

Used 700R4 core, free... rebuild: free... parts $560(TC = 230, rebuild kit 330 from summit)

old non-roller 350 block with internals ~300...

Decent summit cam with lifters, 72 dollars

305 heads ~ cheap as hell if not free...

full porting on 305heads, free, new seals and cleaning... less than 100...

carb induction (swap meet items) Holleys are a dime a dosen, rebuild kits cheap... carb manifolds also cheap... figure 75-100 dollars for the whole deal.

Vac advance HEI distrib 5 dollars from swap meet.

Right there is 1137... Which leave me $363 for other misc parts like motor mounts, fluids, last minute items and gasket... Then I can sell my 2.8 drivetrain and use that money to upgrade parts, used headers and y-pipes and I-pipes are also a dime a dozen at the swap meet... I can put a Performer RPM intake on it, maybe even have block work done depending on how much I can skimp on the block... Heck, for that price I could cut out the carb and buy a TPI setup... but who would do that? My goal is to get away from FI...

Even if I wanted this done perfessionally, if I give my machinist the heads up, he can have a 350 built to my specs, professionally done everything built right the first time for 1200 dollars... that still will only put me roughly 100 dollars over budget...

Sure I'm cutting corners, but there is no better way to spend money IMO... sure I'm spending a little bit more money than people who swapped in used 3.4's, but I will have something I can say I built myself... I will have something that will make me proud at the strip, I can be proud of my car after all...

Just my opinion...

 

yea you go for it. you can not build an engine right cheaper than buying a crate. you cant peroid.

unless you take all kind of short cuts on machine work and parts.

for under 2000 you can get plenty of nice crate v8s with a warranty.

go somewhere else and talk about your v8

 

Hey, I was very nice about the way I put everything.. threw in some IMO's too..

If you wanna play that way...

I'll see you in my rearview... with something I built myself...

 

if someone is close enough to the baltimore area i would take a stab a creating a new ECM tune for ethe 3.4 but the willing participant must have a 3.4. when finished if said person is satified we will discuss the avaiblabilty of the prom.i would most likely sell them for $25. time for me to burn and shipping. plus the cost of a blank chip. just need someone close enough to here with a 3.4 with 3.4 injecotors. also there would need to be a MAP and MAF tune. any takers ?? im 100% sure i can make it emmisions legal to. so whos got one of each ?


and XENODRGN why get away from EFI. its only the best driveability solver ever.maybe working with your efi would be the best solution.

 

funstick, I don't have the time nor patience... I had toyed with a TPI swap... but sensors going bad, injectors that need to be replaced, ect just doesn't cut it with me.... maybe I'm looking at it from a biased POV though, because I have hand NOTHING but problems with MPFI setup... I finally got all the sensors kind-of working, and I diagnose injectors that spray like a garden hose... I cannot justify 70 dollars to have them fixed and the labor to put new ones in, when I can save that money and buy a Holley and a rebuild kit for my new motor...

With a holley.. tune it for best 1/4 mile pass in the summer heat... richen it out a little bit and your done... RB expects I will see the same MPG out of my tuned 350 as do now with my leaking-injectors-exhaust-leak-ridden-POS-2.8 does now...

Right now I can put my headers on... with a y-pipe made for me for around 200 bucks... new injector I can do myself, cleaning will be right around 70 plus shipping... thats damn near 300 I can save and put towards a motor that will make me proud...

And whoever said Crate engines were cheap... cheapest 350 is 2 grand... already blows my budget without any accesories and without figuring in my trans...