will my stock 89 tuned port intake bolt strait on to a zz4 fast burn crate motor

 

The Fasturn heads have raised intake ports the same as the vortecs and they won't work with your stock tpi setup.

 

how about the zz4 355 non fastburn?

 

You would have to elongate the two center bolt holes on each side of the intake to make it work on the base ZZ4. The ports will line up.

 

Fast Burn heads have an intake flange capable of running either a Vortec or a conventional cyl head. As such, it has dual bolt patterns- Vortec and conventional. However, the conventional pattern is the pre-1987 one, in that the holes are perpendicular to the flange. Your 1989 manifold has the revised angle on the four center hold down bolts. Like gixxer9 said, you'll have to elongate those holes to make it work. I believe Edelbrock has a tool to do just that.

 

A standard chev sb intake will not work on Fastburn heads. Yes they are drilled for both but they standard intake runners won't even cover the intake ports on the Fastburns. When the HSR first came out I tried to put one on my Fastburns but when set in place you can still see about 1/4" of the intake port on the heads above the outermost part of the intake.

You must use a vortec style intake on those heads.

 

Like I stated, the BASE zz4 (l98 style heads), can use the standard intake manifold, but the center bolt holes must be elongated to be compatible with the bolt angle. Fastburns are just fancy vortec's, therefore, using the vortec pattern.

 

I have a ZZ4 350 CID and did not have to elongate the center intake bolt holes. The heads on a ZZ4 are L98 style aluminum heads from the Corvette.

 

so you bought the zz-4 crate motor and your stock tuned port intake fit on it wit no mods?

 

Yep, no mods needed.

 

sweet!

 

just get it..... dont think about it just hit submit

 

Hey Jmiller,
I know I am late getting in on this but the ZZ4 does not use L98 corvette heads. The corvette heads are 64cc, the ZZ4 has 57cc. I have both motors. Just FYI

Cheers

Richard

 

88gta305:
I thought they were the same. Years ago when I bought my ZZ4 from Scogin/Dickey, that's what they told me. Could the 58CC be the only difference???

 

what other crate motors pusing 325-450 hp can i find that i can stick my stock tuned port on without any mods?

 

I believe that aluminum L98 Corvette heads are 58cc.

 

I agree with you, I know their 58CC, but I also thought they were Corvette Aluminum L98 heads. That is what was told to me by Scogin/Dickey when I bought my ZZ4. It also is described in the GM crate motor catalog as having Corvette L98 alum heads.

 

They are L98 Corvette heads, I promise.

 

ROH IS RIGHT.... IF THEY'RE ALUMINUM, THEY'RE VETTE HEADS.

 

ALUMINUM L98 heads (CORVETTE) = ZZ4 heads = 58cc

IRON L98 heads (FBODY) = probably the 64cc version

 

I would suggest that you buy an intake rather than different heads. The "Fast Burn" heads are good for more power than the ZZ4 cam can put out. The cam will only pull "hard" (emphasis on HARD) to 4800-5K with the stock stuff, actually I always had the Edelbrock base with the ZZ4 cam..... You will gain a minimum of 500 rpm of MUCH HARDER pull with the aftermarket intake and runners. In fact, it will pull much harder from 4500 rpm on.

GM and Street and Performance both make Vortec/Fastburn TPI intakes. I would go that route first. Later you could add 28-30# injectors, SLP runners, 52MM Throttle body and a much larger fuel pump. I do not reccomend the Buick GN fuel pump for that motor or even a stock motor. No one I know has had a lot of success with it. Most guys I talk to with fairly stock motors are finding the 286 LPH Mustang (UGH!!!) fuel pump does wonders for their acceleration. I am changing my fuel pump later on myself. I just don't have the time to do it right now (Do have a LARGE Bosch pump).

Bottom line: Plan well, take your time, Do it one step at a time if money is short, don't get too carried away and have to redo everything twice or thrice......

:werd:

 

Yea money is real tight so i am trying to build the cheapest setup on paper that will upgrade my power.does anyone know about what setup would be perfect for power and price i want to stay tuned port. please post recomendations of engine/iduction/exaust combos 4 as cheap as possible.