Gunny Highway

iTrader: (1)

I should probably know this, but I'm going to ask anyways.

Is there a difference between the actual throttle bodies themselves between a SBC and BBC? I'm talking about the brackets and the castings? Now obviously the big difference is in the bore sizes, but other than that???

Same gaskets used?

Same FPR only with different spring rates?

Same positions for sensors?

Same cruise control bracket?

Thanks guys.

-The Gunny

DM91RS

Gunny

I thought I'd ask about your goals. Are you planning on a head swap with the cam and intake?

DM

Gunny Highway

iTrader: (1)

Actually I'm getting a whole new 350 motor. I'll probably end up selling the cam. If I'm not happy with the 320 HP and 400 lb/ft, then I'll upgrade the heads. I've posted about my future 350 for a while now. It's the 300 HP TPI motor at http://www.goautocenter.com

Those numbers are dynoed proven by Rich92RS350

DM91RS

Do you know what heads that engine comes with?

Gunny Highway

iTrader: (1)

I had that info at one point so I'll have to see if I have that somewhere, but the heads weren't anything special.

From what I can tell, it's the cam that helps make all that power. I used to know the Comp Cams and Crane equivlents, but I don't remember that anymore.

I'm really not sure what those kind of numbers are good for w/ 3.23 gears, but like I said, if I'm not happy with it, I'll just upgrade to some Trick Flow heads or something.

. . . does anyone know the answer to my original question?. . .

vjo90RS8

iTrader: (1)

the engine has swirl port heads, its just a 92-93 caprice L05 with a comp cams camshaft in it. It might be cheaper just to buy a new L05 from www.paceparts.com and then put in your own camshaft. There is a $400 price difference between the two.

Gunny Highway

iTrader: (1)

Nobody knows what the differences are between the 454 TB and the standard SBC TB?

ShiftyCapone

iTrader: (7)

Well besides the different injectors the 454 has a different IAC connection that will require you to get that plug off of the harness it came from. It also has a little different throttle bracket that has a small tab that needs some fab work done to it. My buddy is rigging up his 454 for his 305 and these are the things we have encountered thus far.

Gunny Highway

iTrader: (1)

Sh**ty

ShiftyCapone

iTrader: (7)

Ah don't sweat it man. It is just a little fabing here and there. Nothing a little grinding and welding and wireing can't accomplish. We are by no means skilled craftsman here and it should work out just fine.

seanof30306

iTrader: (4)

gunny, check this:

http://cgi.ebay.com/ebaymotors/ws/eB...K%3AMEAWA%3AIT

it's a stock throtle body bored out to 2".

i believe it's a better choice than a 454 tb for a number of reasons.

first, it's a direct bolt on (with the exception of the bore size itself). no problems with iac and tps or throttle linkage, etc.

second, i think it may actually flow more air than a 454 tb due to the cut down throttle shaft.

honestly, i'm a little skeptical of his flow numbers, but i think he arrives at them honestly. i spoke with him last summer and asked whether those numbers were at 1.5" hg or 3" hg. he said he simply took a holley 670 throttle body, put it on his flow bench, adjusted the bench till it showed 670 cfm, then put his throttle bodies on the bench and compared them. at least, i'm pretty sure that's how he described the process ... it's been awhile and a lot of airflow theory is over my head.

i don't need this much airflow now and won't for awhile, but when i do, this is the way i'm going. he has 124 feedbacks on ebay, 100% positive. that gives me confidence enough to give it a shot.

if you need even more air, i believe he bores 454 tbs out as well.

vjo90RS8

iTrader: (1)

i never seen a stock TBI bored to 50mm, thats pretty cool

ShiftyCapone

iTrader: (7)

I have sen it but it is rare. I wonder where they get the blades from?

seanof30306

iTrader: (4)

if i remember correctly, he said they machine their own.

vjo90RS8

iTrader: (1)

not a bad price either considering that turbo city wants 250 for their tbi that is only bored to 45mm or something like that, and you have to send them a core.

ShiftyCapone

iTrader: (7)

and they usually come warped. I have heard many horror stories of their turbo city tbi units.

25THRSS

That's pretty cool. About 495 cfm at 1.5 hg. Turbo city says you can only bore it to 1 13/16 max, but it looks like they were wrong.

seanof30306

iTrader: (4)

the more you look at it, the better it gets. "click the more information" link and read it. they're doing a complete refurbishment on them and correcting several design flaws; all for under 200 bucks.

you can find holley 670s used for between 150 and 200, but they're used, ahve the old style injectors and there are fitment issues. you can find used 454 tbis for between 125 and 200, but they're even harder to get to work.

this would appear to flow more air than either and bolt right up. makes we wish i was at a point where i needed one.

ShiftyCapone

iTrader: (7)

Now that I clicked around on his stuff he has been around for a few years. It looks like he i snow trying to create a little market with his stuff. What better time than right now where TBI modding is actually becoming popular. if I could find the right blades i would bore mine. My intake was a breeze and I can't see why the TBI unit would be nay different.

vjo90RS8

iTrader: (1)

i believe these are the same guys that used to bore stock TBIs out to 48mm, i remember being on there website a few months ago, looks like they stepped it up 2mm.

Gunny Highway

iTrader: (1)

Holy crap! Thanks man. Now that's what I would looking for. . . a stock style TB only with bigger bores. Besides I hate do "minor alterations" to things, because they never turn out to be minor.

Gunny Highway

iTrader: (1)

Well I purchased one.

Now the only thing I need for my 350 swap is the AFPR, 65# injectors and the motor .

Oh well, one step closer.:lala:

THANKS SEAN!:yourock:

seanof30306

iTrader: (4)

you're welcome, gunny.

lon at top down solutions has a vafpr kit with everything you'll need to do the installation. just click on the "top down solutions" link at the top of this page.

also, you can find those injectors on ebay all the time. just do a search on "tbi" in parts & accessories, air intake & fuel delivery (or something like that).

here's a link to the search. just save it to you "favorite searches"

http://search-desc.ebay.com/search2/...=100&query=tbi