killacamaro

iTrader: (5)

I Have been talking to a few people on helping me choose the right intake for my car. i right now have an 91 rs with stock 305. my plans are headers,exhaust lt1 cam, and go from tbi to carb. i am stuck on what manifold to chiooose. can u guys point me in the right direction.
some are saying this manifold wieand X-cellerator and some are saying the edelbrock rpm. what should i go for? please help me

xpndbl3

iTrader: (5)

performer rpm air gap

Sonix

iTrader: (1)

I like the plain performer RPM, but the air gap works well too. Check hood clearance and whatnot.
Don't bother with the straight performer, that won't get you anywhere.

killacamaro

iTrader: (5)

why should i not get the weiand x-cellerator???? and why go with the performer?

xpndbl3

iTrader: (5)

i personally like the edelbrock manifolds, the performer rpm and rpm air-gap are both proven intakes thus why i'd recommending them. The air-gap is an even more updated design and "should" fit under a stock hood.

killacamaro

iTrader: (5)

do u know anything aboiut the wieands? or the exellerator?

xpndbl3

iTrader: (5)

yea i know they've been around for 25 years probably unchanged and no one local that races uses them compared to edelbrock, I recommended you an intake, you are set on the other one, so take that for what it's worth.

F-BIRD'88

The accelorator is a single plane manifold. You do not want any single plane manifold. It is a mismatch to your planed other mods.
A dual plane hi rise type manifold is the best choice for you.
Wieand and Holley have many to choose from. eg Holley #100-36
www.holley.com
www.professional-products.com
http://www.holley.com/index.asp?division=Weiand
eg Weiand action+plus #8120

Any of the dual plane manifolds wil make more power than a single plane manifold will in the rpm range you will be using with your 305.

killacamaro

iTrader: (5)

what is the part # for the edelbrock rpm?

Sonix

iTrader: (1)

7101 IIRC for the square bore, 7104 for the Q-jet style. That's for non-vortec pre 1987 style though.
Look it up on summit, this isn't nearly as hard as it sounds.

racer J

Why are yall giving him manifolds for PRE 86 heads? He told yall he has a 91.

Codename 47

iTrader: (4)

Those manifolds will work on 86 and up heads. Just not the vortec heads. Vortec heads have the vertical bolts.

Go with an Air Gap. In fact, you could probably use the "crosswind" which is the knock off of the air gap. It's cheaper.

killacamaro

iTrader: (5)

why do i not want a single plane manifold? and why is the performer soo much better then the weiand?

racer J

No, no they will not. Look at their site. Every 8120 manifold listed is for pre 87 heads.

killacamaro

iTrader: (5)

http://store.summitracing.com/partde...6&autoview=sku

that is the manifold that people have told me to get. what is wrong with that? they say it will give me more power then the performer

426 Wedge

Looks like a great manifold for an aggresive cam, oval track, and a 7 grand rev limit. What size cam will you be using? Have you considered what cam works well in a 305? BTW What are your intentions for your car? Is that really the right manifold for a 305? I'm looking for an intake too.

killacamaro

iTrader: (5)

Why do u say this intake is for OVAL TRACK? i would think its for street/strip no?

i wanna do ultimate tbi mods, 3" catback exhaust, headers, lt1 cam. and sum new rear end gears. i have msd ignition box, wires and distributor coming, i have spec stage 2 clutch kit, and 19lb flywheel coming, and underpulley set. Taking out the smog pump and mb delete the a./c those are my mods soo far that im gunna do. so does that intake sound like the 1 for me?

jstoltz

iTrader: (16)

I would listen to xpndbl3 and sonix they both know what they are talking about. Single planes will be a big let down on a basically stock 305 maybe with a .550 lift cam and a power adder and forged internals and lightweight valvetrain components you Might be happy with that intake. The Edelbrock Air Gap stuff is a preference for alot of engine builders and the professional products crosswinds as mentioned are also good (not as good in my opinion)
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you want to utilize your mid range rpm. unless it will basically be a strip car which in that case you better get a better motor that a stock compression 305.

killacamaro

iTrader: (5)

thanx js for the info. just soo confused on this bs

jstoltz

iTrader: (16)

no problem. just my

426 Wedge

Well, Have you red the description in the Summit link you provided? Says "Oval track"

Sonix

iTrader: (1)

I wouldn't lose sleep over what they say the usage is, that's more as a reference for RPM. Match the RPM, and how "good" the manifold is. Ie, a Torquer 2 might say it's right for your RPM usage, but it's a POS... The quality is something we can advise on.

Anyway, the amount you save by using a professional products manifold isn't really worth it. Do a search, some members have posted pictures on the quality. The ports aren't a consistent size, etc etc. For maybe $20? bah, skip a few big macs and you're there

On second thought, (after re-reading this thread more carefully)...

-mildly modified 305 TBI engine
-wants to go carbed
-sticking with TBI heads

Basic performer might be your best bet. You'll never get over 5000RPM in a 305 with TBI heads eh?

Codename 47

iTrader: (4)

..

killacamaro

iTrader: (5)

sonix thanx for the info and all your help, i will guess be going with the performer. do you think u can tell me a model # performer fromm summit to get, there are a few to choose from and i dunno what to get.

http://store.summitracing.com/partde...4&autoview=sku is this rite?

http://store.summitracing.com/partde...4&autoview=sku or this?

xpndbl3

iTrader: (5)

don't listen to sonix....he means well but his info is not correct. Performer rpm is the one you want, not the basic performer, it will make on average 10hp more at least even at low rpms over the basic performer. go on summit and get the performer rpm for the 87-up style heads, which shouldn't be hard to find.

Sonix

iTrader: (1)

The two you listed - the more expensive one was the air gap one. If you think it's worth it, go for it.

xpndble - yea, if it was me, i'd use the RPM too, but I'd hate to hear him saying that his car feels lazier at the low RPM after the swap. I'm not sure anyone *really* loses anything in the low RPM, but just in case...

In 1987 or thereabouts they changed the angle of the center two intake manifold bolts, that's the reason they have pre 1986 and 1987 and post, intake styles. You can use a die grinder and/or special washers to correct this, but if you don't have to...

I also never heard what carb you were going to use. A holley (squarebore) or a q-jet (spread-bore style)?

Ya know what? I couldn't find it just now. ?!? Did they not make it for post 1987 engines??

xpndbl3

iTrader: (5)

EDL-2604 $259

I doubt a dual plane would feel soggy down below, and the performer is more restrictive than the performer rpm either way

Sonix

iTrader: (1)

That's what he just listed above there. Dual plane yes, but not performer RPM. That's just the plain jane performer, albeit air gap. So

Just so everyone else is all on the same page, Performer and Performer RPM are both dual planes, Victor Jr and higher (or other brands) use single plane, typically associated with higher RPM usage.

xpndbl3

iTrader: (5)

hmmmm yea you're right not an rpm, i can't find it online, i know i've seen them before.

killacamaro

iTrader: (5)

soooo wat do i want for an manifold?

jstoltz

iTrader: (16)

just go with a performer rpm
http://store.summitracing.com/partde...1&autoview=sku

or if you have more to spend this one.
http://store.summitracing.com/partde...1&autoview=sku
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if you can find either one on Ebay for cheaper go for it. they are both 86 and down intakes. easy mod needed to use for 87 and up. if you don't feel like trying to mod it yourself most machine shops will do it for around $30.

Sonix

iTrader: (1)

You still haven't said what carb you're going to use. You need to get the right manifold for your carb (or later you buy the carb that you need for that intake eh?)

The performer RPM is a good one as mentioned, just mod it. Or get the Performer air gap that you linked to before. Just make sure you've got the right carb for it eh?

BLACK ICE

I myself am going with the professional products crosswind intake. It is the lower priced ripoff of the airgap I have had both intakes and cant tell a diffeence with the butt dyno airgap/crosswind best intakes for sbc imo and for carb I would recomend a speed demon

426 Wedge

What heads will you be using? An upgraded manifold is useless without them. You won't see any performance advantage with just a manifold and carb.

killacamaro

iTrader: (5)

i think im gunna just buy the manifold and stick wit TBI just get an adapter plate for the TB. people are saying to do that. but i dunno im new to this TBI **** and know a lil about carbs. soo what do u say i should do? do u think its worth changing the Intake and using my TB? or should i just replace the intake and go carb? ill be using stock heads for a while until i get sum more cash for better heads. mb go 350 who knows

xpndbl3

iTrader: (5)

why not just not mess with doing things twice and just save money until you can afford to drop in a 350 and just enjoy your good gas mileage while it lasts

jstoltz

iTrader: (16)

I second that or get the carb and intake now whatever you want to do. the intake swaps right over to the 350.

killacamaro

iTrader: (5)

well i really dont wanna do a swap,. i rather keep this engine. cuz i dont have the tools to do the swap. how much will it cost to do a swap? Also do u think its worth to get a carb intake manifold and use a TBI adapter and use the TB?

Codename 47

iTrader: (4)

I don't see any big gain for the money and time. And buying a carb for a 305 isn't a great idea, since it will then be too small for a 350, so you're wasting your money.

Maybe you said you have the exhaust done already, but if you don't, buy some headers and a catback system.

killacamaro

iTrader: (5)

yeah i got a flowmaster 80series muffler. i am getting shorty headers and custom y-pipe then doin straight pipe to muffler. also wanna get an LT1 cam. but im still wanting to knowk about intake. as in what i should do.

Codename 47

iTrader: (4)

I wouldn't waste your money on it. Save for a 350. The swap isnt difficult and you buy the tools as you go.

killacamaro

iTrader: (5)

i guesss illl save, thanx again.

creepingdeath

I bet you could get used 350 heads and block for the price of a edelbrock manifold. a mild 350 is way better than a maxxed out 305.

killacamaro

iTrader: (5)

Hey how much do you think a complete 350 is? Ur talking about just the block n heads. Don't I need all the parts to go wit it? I can't rebuild an engine lol. I kno sum stuff not all tho.

jstoltz

iTrader: (16)

just look in a trading post or call a junkyard you can find stock 350's for around $300

Codename 47

iTrader: (4)

I found my rebuilt, running carb to pan 400 small block for 600 bucks. Had maybe 200 miles on the rebuild. That's one nice thing about Chevys. There are always good deals around if you look. Get on a local racing board and I'm sure there is good stuff for sale.

Hell I bought a non running complete intake to pan 350 for 24 dollars. Needed a rebuild to be reliable.

Just gotta start meeting people in your area. Everyone knows someone who knows someone. That's where the good deals are