Ok these are my last two questions and then i'm going to shut-up and drive!!!!

1. 3.1L and 3.4L engines HAVE the SAME cams CORRECT??????

2. Who makes 9.5 to 1 compression pistons for the 3.1L engine????

3. What is a good cam that is REAL close to the 3.4L / 3.1L cam but only tweaks HP a LITTLE???


There I'm done.
Just answer these questions, I already know enough about the 3.4L swap.

Thanks
Ryan

 

1. No

2.Ross


3.crane is about the only one who makes a computer compatible cam


computer compatible=mild

there you have it

 

Ok great then 3.4L cam it is.

Any other piston makers, I don't need a custom job just bolt on.

What is the CAM part number??

 

As far as cams go I would not be too sure that the 3.1/3.4 in fact do not have the sane grind. I challenge anyone to present specs for the 3.1/3.4 cams that verify that they are in fact different. And, please don't tell me that those specs are in the GM performance book, because they are not! Yes, the 3.4L upgrade engine offered bt GMPP has a different cam that is intended for S10 pickups, but IMO, the ones in the 93-95 Camaros are not as radical.

 

x55Cam
But it makes since because the 3.4L has more volume so you want the valve open a LITTLE longer.

 

Ryan_Alswede
There really are no set rules to follow when displacement is larger or smaller when deciding what cam to use. Whether it's a 2.8L, 3.1L or 3.4L, you can cam these engines identical if one (GM) is trying to meet certain guidlines for economy and efficiency for use in production type vehicles. GM had to be concerned in meeting emissions requirements when they decided to swith to the 3.4, since more cubes = more volume = higher emission levels. So why would they increase the lift/duration of the cam to a level that would possibly exceed the limits. With the GMPP 3.4L GM marketing wanted to make it very clear in making everyone aware that the motor was not legal in California because of emissions due to the type of cam being used.
Like I said previously, you'll have to come up with some specs comparing these cams to be sure that they in fact are different. I tried. GM parts persons, unfortunately, don't know jack.

 

There is a company called Mahle that has the pistons for the 3.1 (p/n 027250). I dont know the compression rations on them and I think they offer several different type, someone correct me if I am wrong. They also sell piston rings, rod, main, and cam bearing as well. Email me and I will give you a phone number to a retailer near you.

~Josh~ beangta@aol

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1992 Firebird
3.1 Liter V6
K&N Filter, everything else stock, for now!!!

 

x55Cam
Good project for you to work on, on finding out the specs of the 60 degree engine cams.

KED85 says the 3.4L has a BETTER CAM so he has used it so he would know....

O well
Ryan

 

Ryan, X55Cam and I have had abit of disagreement on this issue.
ABOUT THE EASIEST way to truly find out is to obtain a page from a 1993-95 F-Body HELMS book.
On that specific page, would be the 3.4 cam specs, F-body version.
Another way to find out is to ask Crane. They designed the 3.4 cam for GM.
X55Cam doesn't fully agree with the specs stated in the GM Perf Parts book. I have to side with his thinking, but, not the reasoning.

GM says the Crate 3.4 is 160 HP @ 5K RPM
194 Ft. Lbs Torque @ 2700 RPM

My Brochure for a 1995 Firebird states the 3.4 at 160 HP @ 4600 RPM
& 200 FT Lbs Torque @ 3600 RPM.

NOW FOR THE FUN!
1995 Grand Prix 3.4 DOHC!!!!(same brochure!!)
210 HP @ 5K RPM & 215 Ft Lbs Torque @ 4,000!

And the 3.1 engine (used in a Grand Prix) is 160 HP @ 5200 RPM & 185 Ft. Lbs torque @ 4,000.

NO, cam specs are NOT provided!

Draw your own conclusions.

PS Dual Over Head Cam.
NO THIS ENGINE WILL NOT FIT OUR F-Body cars.
Period. The end of that thought.
If ya ever saw a pic, you'd know why.
Honest.



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Chat Soon,
KED85
Karl
1985 Firebird 2.8 to 3.4 swap project for Smog Happy LA, CA

 

KED85 I say the 3.4L has a longer valve time because it needs to fill a larger volume.