Hi All

I am new to the site, I am going to put the new Chevy 3.4L crate engine into my car, I am putting the Edelbrock Performer 4V manifold. 390 Holley carb. I am staying with the cam that come with the crate engine because it is just about the same as the Edelbrock's. I am going to have to get a distributor any suggestions. Any thoughts and suggestions on my whole set up.

Thx.

 

GO with a bigger cam. And port those factory heads, you'll love the results.

 

Well said!

 

Actually, the crate cam is the largest 6/60 cam I have seen. It is designed for s10s and lots of torque, but not much top end.


I dont see where your going "wrong".

 

ON a carb'd 3.4 4bbl setup, I'd recommend a cam with about 224/232º @ .050" lift, and about .550" lift - make sure the springs will handle it! Port the heads, as well!

 

YA SCORED A 3.4 CRATE ENGINE
YA GOT ONE OF THE LAST ONES AS THEY NO LONGER EXIST!
IF IT WAS ME, I would UPGRADE ON THE ROCKER RATIO to make the cam, "better". Either use 1.52 aftermarket or score 1.6.
I do know several here have done that "trick" & pleased with result & cost involved.
Next
Distributor
Go find a 1982-1985 S-10 Blazer distributor.
FEDERAL VERSION ONLY!!!! CA version is electric just like your F Body now.
S-10 Blazer distb. IS VACUUM ADVANCED and that is what ya need to make your conversion seamless.
NEXT IS the fuel pump!
What year is your F Body platform?
The 3.4 mills do not have a mechaincal mounted fuel pump provision.
IF ya use an in tank pump, it'll kick out too much pressure (like 45PSI!!).
Carbs need only 5-7PSI.
I'VE READ ABOUT a pressure reducer/regulator for the FI pumps.
In my Blazer swap (I have a 1985), I mounted a Carter electric fuel pump 5-7PSI. It works well in my situation, as I stuck the factory 1985 2SE carb stuff onto the 1995 3.4 mill.
Hope these are good clues.

 

PS just noticed ya have a stick set up
YOU NEED SCORE A 3.4 FLYWHEEL
Others can answer exactly WHY BUT
Ya do need score a 3.4 flyheel
It has to do with balancing/vibration issues.
3.4 balancer & flywheel (auto or stick) are matched items!, to be used together or else ya get vibration issues.
CAN YA CONVERT THE 2.8 flywheel to 3.4 usage?
Let others chime in on that detail
My two 3.4 swaps involved auto trannys & used what ya got with the 3.4 crate mill.
ALSO WATCH OUT FOR YOUR OIL FILTER HOUSING
YOU MAY need reuse your original vehicle platform 2.8 oil filter housing.

 

You didn't say what year vehicle you were putting the crate motor into. If it already has a tbi add tthe 4.3 injectors and save yourself some money,or you can use the larger tbi off a 4.3 engine. The difference between the cratecam and the crane is the LSA ,the cratecam makes it's power in the midrange,the crane makes it on the top,max rpm is the same.I'd stick with the cratecam because with the weight/power ratio you'll need the torque provide by the cratecam.

 

3rd Gen F Bodies never came with 4.3
3rd gen F Body V6 never used TBI.

The 3.4 Crate engine cam and the assembly line issued 3.4 cam, underhood of the 1992-thru Dec 94/Jan 1995 3.4 engine in the 4th Gen F Body, the cam was designed by Crane.
It's identical.
States this in the GM Performance Parts Book.
GM Legal Dept would not allow this detail to be printed unless it was true. They'd be sued so fast by Crane.........serious this detail is true
Crane Cams designed the 3.4 cam. Crate engine, production line engine, identical cams.

 

Sory KED, know were friends, but I disagree with this one.

The cam in the 3.4 crate is different the the cam issued in 93-95 3.4 fbodys.

Crate cam is designed for torque with carb injection, lots higher lift, differnet duration.

 

Do you have smog check?

 

Dumb question, what is smog check?

 

Is the vehicle subject to a smog inspection?

 

Typing my reply based upon information supplied in the GM Performance Parts book....
GM Crate engine part number 12363230 (the 3.4 mill)
Cam specs- 204/216 @.050" lift

GM Part number 12363220, Group number 0.519-.539 Camshafts, Camshaft kits & bearings

The following camshaft KITS were DESIGNED AND MANUFACTURED BY CRANE CAMS CO. (r) FOR GM SERVICE PARTS DIVISION. THESE CAMSHAFT KITS INCLUDE (1) CAMSHAFT & (12) TAPPETS
This performance flat tappet hydraulic camshaft is used in the new 3.4 engine conversion package (P/N 12363230) & is also applicable to 2.8/3.1 litre engines. Designed to increase mid-range torque & HP, this camshaft is ideal for daily performance usage. The duration at .050" lift is (intake/exhaust) 204*/216*, while the valve lift is .427"/.454". The basic RPM range is 1500-4500RPM & the lobe separation is 107*.

HP of 3.4 is 160 @ 5000 RPM and torque is 194 foot/pounds at 2700 RPM. That spec from GM Perf Part Book.

Anyone want to guess what is the published HP/Torque specs offered in the General Motors 1995 Firebird brochure?
Try 160 HP at 4600 RPM & 200 foot pounds at 3600 RPM.

I dare say the cam(s) is identical to the assembly line 3.4 used under the 1992-95 V6 F Body rides.

Dale you are still numero uno compadre!

 

I have found the crate cam as:

204/216, .427/.454, lobe112, IC 109


stock 3.4 cam as
196/203, .394/.410, IC 109

:shrug:

 

I cannot account for the information you've offered Dale.
I offered the sources for my response.
Not making this a "duel of words!!!",
KED85

 

These post is very old, but I put the engine with a Tremic 5spd

into a 71 TVR