Cams for 3.4

Oversteer · Post by **Oversteer** » Thu Nov 10, 2005 11:48 am

Then purchase the 272 and revert back to a distributor. Easy as pie.

willie · Post by **willie** » Thu Nov 10, 2005 11:53 am

Oversteer wrote:Then purchase the 272 and revert back to a distributor. Easy as pie.

Uh...negatory on the pie, I'm afraid - the engine is mounted too close to a firewall to fit a distributor (remember, this is in a 1957 MG).

I don't want to go notching anything I don't have to, like the firewall (we've already been doing surgery on the front frame crossmember - that is one BIG mother front pulley) - I'd rather pay a few extra bucks and get a cam that works, or have mine ground.

donk_316 · Post by **donk_316** » Thu Nov 10, 2005 11:57 am

Keep the DIS but DITCH the SFI! SFI for what? Slightly better gas mileage assuming your cruise under 3000rpm? Not worth the hassle.

Get the cam of your dreams and run DIS then program your heart out.

allWorkNoPlay · Post by **allWorkNoPlay** » Thu Nov 10, 2005 12:20 pm

Why would you swap a heavy iron GM motorthat doesn't make much power?

I mean, once you're swapping engines, you might as well put in a good motor.

willie wrote:
Uh...negatory on the pie, I'm afraid - the engine is mounted too close to a firewall to fit a distributor (remember, this is in a 1957 MG).

donk_316 · Post by **donk_316** » Thu Nov 10, 2005 12:30 pm

allWorkNoPlay wrote:Why would you swap a heavy iron GM motorthat doesn't make much power?

I mean, once you're swapping engines, you might as well put in a good motor.

willie wrote:
Uh...negatory on the pie, I'm afraid - the engine is mounted too close to a firewall to fit a distributor (remember, this is in a 1957 MG).

You cant say that without giving your opinion as to what a "good motor" is....the correct term is ENGINE!!!!! lol! sorry pet peeve

willie · Post by **willie** » Thu Nov 10, 2005 12:34 pm

donk_316 wrote:Keep the DIS but DITCH the SFI! SFI for what? Slightly better gas mileage assuming your cruise under 3000rpm? Not worth the hassle.

Get the cam of your dreams and run DIS then program your heart out.

OK, but then that gets me into a hybrid set-up using an earlier ECM like the Fiero unit, and I'd have to figure out what impact that has on the DIS....argh...my brain hurts!!

willie · Post by **willie** » Thu Nov 10, 2005 12:38 pm

allWorkNoPlay wrote:Why would you swap a heavy iron GM motorthat doesn't make much power?

I mean, once you're swapping engines, you might as well put in a good motor.

Because I LIKE the GM V6 and because it fits fairly well. I agree that if I wanted something a bit more technically satisfying I'd be measuring it up for a Honda S2000 driveline.

My buddy is doing a Nissan 240ZX swap into a 61 Triumph......

Besides, I could always turbo the GM engine as I did in the Fiero, but I really don't NEED all that power in a sub-2000 lb. car, do I?

donk_316 · Post by **donk_316** » Thu Nov 10, 2005 12:40 pm

No you dont need the Fiero ecm.. Get a 7727/ 7730 ecm. It will run your V6 on DIS with no probs.

Available on almost every gm v6 from 88-91

Shaun41178(2) · Post by **Shaun41178(2)** » Sat Nov 12, 2005 4:54 pm

I am guessing you are tryignto use a OBDwhat 1.5 or 2?

I say get a OBD 1 like a 7730 and plug it in Might have to repin but it will run it flawlessly and then just have to do some minor tweaking to get it perfect

Screw SFI. Its a joke and does nothing for power. Who cares if you get an extra 2 mpg pn the freeway. And besides that, if you do 70+ on the freeway you are prob above 3k rpm anyways or darn near close to it.

Can you reprogram the computer you have now to not have the SFI code so it doesnt' look for that cam signal?

Talk to sinister fiero on here. He reburns chips and might be able to help you.

willie · Post by **willie** » Sat Nov 12, 2005 5:17 pm

The 93/4 Camaro uses OBD1.

I understand that there are people around that can flash program the PCM.

As this runs SFI, why not let it continue to do so? Assuming I can get a cam, of course.

If the cam proves to be a problem, I'll look into your suggestion - keep the OBD1 box but reprogram to fire the injectors as batch rather than sequential - thus allowing the use of a regular cam.

Shaun41178(2) · Post by **Shaun41178(2)** » Sat Nov 12, 2005 5:27 pm

If you want a larger cam without going with a silly regrind that limits your options, then you will need to have the computer reflashed or rechiped as you will. No otehr way around it.

SFI is ghey. Ditch that bitch.

The Dark Side of Will · Sat Nov 12, 2005 8:40 pm

Shaun41178(2) wrote:Who cares if you get an extra 2 mpg pn the freeway.

More like 0.5 mpg.

The Dark Side of Will · Sat Nov 12, 2005 8:42 pm

willie wrote:The 93/4 Camaro uses OBD1.

I understand that there are people around that can flash program the PCM.

As this runs SFI, why not let it continue to do so? Assuming I can get a cam, of course.

If the cam proves to be a problem, I'll look into your suggestion - keep the OBD1 box but reprogram to fire the injectors as batch rather than sequential - thus allowing the use of a regular cam.

Actually, it ought to revert to batch fire on its own if you just don't supply it with a cam sensor signal. However, it will also throw a code. This code may do things like disable long term fuel trim learning... or it may not... look it up. If it doesn't do anything but tell the driver there's a problem with the cam sensor, just have it disabled.

willie · Post by **willie** » Sun Nov 13, 2005 11:04 am

Alright, another direction I could go - has anyone had experience with Simple Digital Systems here in Canada?

After market management system to replace OEM - converts to batch fired injection, does away with little problems like defeating VATS anti-theft, programmable without chip replacement.

Anyone tried this?

The Dark Side of Will · Sun Nov 13, 2005 10:45 pm

Cheaper to program your own 7730. GM computers are more sophisticated as well.

BigRedDeckSpoiler · Post by **BigRedDeckSpoiler** » Mon Nov 14, 2005 11:53 pm

This is probably too little, too late, but the part number for the Camaro cam is 10166324.
It specs out identical to the Fiero cam. .394/.410 intake/exhaust valve lift.
If you use 1.6 rockers, you'll get .420/.437.
The only difference between the two is that stupid tab for the cam sensor.

The cam for the 3.4 crate motor is 12363220, or 12364059 (complete kit.)
It's the Crane H-260-2, with a GM part number.
Specs are .427/.454 or .455/.484 with 1.6s.

The 272 is .454/.480 or .484/.512 with 1.6s.

---------------------------
From the Department of Redundancy Department.

willie · Post by **willie** » Sat Nov 19, 2005 5:47 pm

OK, finally made a decision. Rverted to batch fire but retained DIS, so can use any cam.

Decided to use the Crane 272, but with 1.52 rockers (are the 3.4 rockers 1.6 stock, unlike earlier 3.1 and 2.8, which are 1.52?)

Reason being that I can easily get springs that avoid coil bind at a .480 lift, but getting them for over .500" is a bit more challenging.

Went with Comp Cams rockers, springs etc. which I like.

Will start rebuilding engine once we get the engine mounts built.

Another questions. The Camaro flywheel is....generously dimensioned, especially compared to the flat Fiero unit.. How much weight have any of you removed? I like something like 18 - 20 lbs. on the street.

And I don't suppose you Fiero types know what lightweight ministarter (like the minivans use) works on the Camaro mount (right side, unlike the left side mount of the Fiero and other transverse engined cars).

donk_316 · Post by **donk_316** » Sat Nov 19, 2005 6:39 pm

Any 3100/3400 is the "mini starter" that works on all other 60 v6 engines.

Series8217 · Post by **Series8217** » Sat Nov 19, 2005 7:24 pm

willie wrote:And I don't suppose you Fiero types know what lightweight ministarter (like the minivans use) works on the Camaro mount (right side, unlike the left side mount of the Fiero and other transverse engined cars).

donk_316 wrote:Any 3100/3400 is the "mini starter" that works on all other 60 v6 engines.

I dont think there was a 3100/3400 used in a RWD setup.. the Camaros used 3800s after the 3.4 pushrod.