First off, Howdy! This is my first post here, found this place while Googling the casting numbers from my stock intake mani.

Ok, so. I've got a '89 Firebird that was TBI, switching over to carbed. The intake mani I ordered (Weiand Stealth, don't have part # handy) didn't fit. I deduced from this that my car's got the 87+ cast iron heads, as the center 4 bolts are angled differently than the outer ones. I don't want to enlarge any holes, I want a direct fit manifold. The part numbers I got from Holley for intake manis are 8024 and 300-64, but neither really tickle my fancy as a replacement. I've looked, but I can't find any other manifolds that will bolt directly up. Need some suggestions

 

http://www.summitracing.com/parts/WND-8170/

 

Only difference I can see for sure is where the distributor bolts down. My stock mani only had one bolt hole, this one's got two. And I can't tell if the center bolts match or not. The guys at Weiand said they only carried two manis for my car, the two mentioned above.

 

It will fit its for an 87 and up sbc. And the pic they have might be a generic pic of another manifold.

 

SBC? And any idea how summit does returns, if I do have issues? I know you guys prolly know your stuff, but I've been having a lot of fitment issues with parts I bought prior to finding these boards and it has left me leery of taking advice without actually comparing what came off the car to whats going back on.

 

SBC= Small Block Chevy. You can return it but your paying for it. If you want to talk to someone call there tech line and verify the part to your car.

 

Ah. And I talked to Weiand, they said the 8170 wouldn't fit. Was told 8024 again, so I guess I'll be going with that. Gonna call Summit though, still probably ordering from them. Want to get that intake mani and some longtubes for my '98 TA

 

The 8024 uses the stock quadrajet carb (spreadbore) the 8170 uses holley (squarebore). Thats the only difference. Since you never specified a carb i went with the 8170 since you where doing a tbi to carb swap and you probably ditched the computer.

 

The Performer intake from Edel (off my head, I think it's 2104). Fits your years and it's carb pad is drilled for both square and spreadbore.

 

Manifolds that fit 87-up bolt pattern heads:

Weiand 8024. Fits QJet or Holley (use w/ squarebore adapter plate if using Holley-style carb to prevent a vacuum leak). Also sold for a few bucks less under Summit's house brand part number 226016.

Weaind "Street Warrior" 8126. The ONLY modern computer-designed intake manifold made for 87-up heads that I'm aware of.

Edelbrock 2104. Edlebrock's direct competitor to the 8024.

Edelbrock 3706. Same as 2104 but with EGR valve provisions.

There are also some Holley manifolds that fit 87-up heads, but you're not likely to find them new, since Holley sells all it's intakes under the Weiand brand now. The 300-70 is a particularly good one since it's the only high rise dual plane in this group. It's rated for 1500-6500 RPM range, similar to a modern Performer RPM and has similar dimensions.

 

Also says in the notes that you will probably need an adapter plate for the 8024 if useing a holley for it to seal right. In other words yes the extra holes are there but, the intake is for a spreadbore. My bet is still on the 8170

 

Carb's an Edelbrock 600CFM. Also, I'm quickly falling in love with this site. I used to hang out on the Hideout, but there seem to be less people posting there than there used to be. Got more help in a day or two here than several more over there.

 

http://www.amazon.com/Holley-300-70-.../dp/B000CMHQBM

This? If so, it'll be the one I go with.

 

The photo ain't right (300-70 is squarebore/Holley carb flange only), but the part number and specs are. So, yes, that should be the intake. Make sure it's got the right part number cast into it when you take it out of the box to confirm.

 

On another subject..... regarding that Weiand 8170 manifold that 84 Z28 posted about....

He's absolutely right. Must be a relatively new addition to the Stealth line from Weiand. They didn't have it listed on their website last time I checked. So today I checked and he's absolutely dead-on with his info.

It's a modern computer-designed high rise intake (a direct competitor to the Edlebrock Performer RPM, if they offered that manifold in 87-up intake bolt pattern, which they currently don't). All the goodness of modern computer flow-modeled design runners but but in the bolt pattern you need.

It will accept any square-bore carb (Holley or Edlebrock) and would probably offer the highest performance potential for a moderate to high performance street motor of any of these intakes.

Probably a better intake overall than the 300-70. Given that the prices are almost the same, it's probably the one I'd select as well.

I just added it to my "big spreadsheet of small block Chevy street intakes". If anyone wants a copy, just shoot me an email.

 

Its a very good intake. I run one with a special 1" HVH carb spacer and i have no complaints.

 

Awesome! About to place my order now, along with a set of Pacesetter LTs for my TA

 

I've ran into a snag. While some friends and I were taking the car apart, nobody marked the distributor's position. I *am* changing it out, since I'm going from TBI to carbed, so I might have had to redo the timing anyway, but whats the proper procedure? I've never done it before, and I don't wanna try to do it by trial and error and break something.

 

Put the #1 cylinder to tdc and point the distributor at #1 cylinder.

 

Whats the easiest way to accomplish this? Use the starter to turn the motor before I start putting the motor together so I can see into the #1 cylinder, then leave it 'til I get everything together and re-install the distributor and point it at #1?

 

pull the plugs and you can do it by hand useing the balancer or use a flywheel tool.Forgot to add something. Make sure your on the comperssion stroke when doing tdc.

 

Will I be able to look to get a good look at the valves to tell which one its on? Sorry for all the questions, this is the first car I've ever owned with a distributor ^.^

 

Got the car back up and running. Well, mostly. I've still got to tune the carb. However, I've run into a snag and can't see an easy way past it. The cables that attach to the carb don't reach, and I dunno any way to extend them. Other than that, I think I'm done. It isn't the cleanest or best looking job I've seen, but it suffices for now.

As I said, though, the car will run if I've got someone under the hood to manually play with the throttle control on the carb. Timing is right and all that good stuff, but the car still won't idle. Figure this is because the carb isn't tuned right.

 

I just ordered an 8170 a few minutes ago for my 92 Firebird I'm working on.. I have to research the carb again but I have Holley 0-80783C (4150 650CFM w/ electric choke, vacuum) scribbled down from a few months ago I'll probably grab..