So How Big

[kessler]

How big are the stock throttle bodies, cuz im looking through summitracing.com and i found this. Think its worth the money

http://store.summitracing.com/defau...earchinresults=false&N=0&target=egnsearch.asp

 

[kessler]

Re: So How Big

Ok nevermind my link didnt work anyway i found a twin 58mm throttle Bodies are they bigger then the stock Sy/Ty

 

[jjorgensen52]

Re: So How Big

yes they are. Factory size is dual 52mm blades. What brand / what price is it? I know Race Proven Motors carries the BBK 58mm throttle body (which I just bought, very nice :tup: ). I think that Turbo Time may also carry them, but not sure. Anyway, hope this helps

 

[nallj92]

Re: So How Big

im pretty sure factory is 48mm

 

[dgoodhue]

Re: So How Big

im pretty sure factory is 48mm

:boink:

 

[JKsSyclone]

Re: So How Big

Is this the one you were looking at?

58mm. $309.88 from Summit

 

[jjorgensen52]

Re: So How Big

:boink:

I fail to understand the meaning of this :lol:

f you have tried adapting a LT1 style throttle body to your SyTy you know they are different. BBK now makes a Syclone/Typhoon specific throttle body with twin 58mm, blades vs. the stock 52mm

 

[typhoon92]

Re: So How Big

Is this the one you were looking at?

58mm. $309.88 from Summit

That looks sweet!!!! I'm going to have to get one of those since my stock one leaks from the throttle body shaft.

 

[blk00z28]

Re: So How Big

how much hp gain are we talking about getting from this?

I can think of another way to spend $300 then on a TB thats only 10mm bigger.. :roll: :dunno:

 

[dgoodhue]

Re: So How Big

I fail to understand the meaning of this :lol:

It supose to be nodding smile. I can assure you its 48mm Throttle body, RPM site is wrong.

 

[dgoodhue]

Re: So How Big

how much hp gain are we talking about getting from this?

I can think of another way to spend $300 then on a TB thats only 10mm bigger.. :roll: :dunno:

It actually dual 48mm and dual 58mm throttle body openings, the stock one can usually be bored out to 52mm and sometime 54mm (Never do that in boosted application, the metal is too thin in few places). If you take the area 48mm and 58mm diameters, its 54% larger.

Having said that in the SBC world, I have seen some pretty good numbers put in by 350 running stock throttle bodies and even some with streetable stroker kits. Among those who are knowledgable, most people don't recommend 52mm throttle bodies until they have a stroked SBC, and 58mm are only recommend to the most radical of builds. I have seen a couple 11's sec N/A 383 Corvette make less hp with a 58mm vs 52mm (They often cause throttle tip in issues as well)

 

[Try Me]

Re: So How Big

what are the differences in the lt1 as opposed to the syty specific? Also, does anyone remember seeing a "monoblade" throttle body that was like 70mm? I think it was from arizona speed or something like that. I think once my stroker is done w/ the aluminum heads etc i might benifit from a little larger unit if i dont go to a different style intake manifold...

 

[dgoodhue]

Re: So How Big

TPIS does/used to sell a Monoblade (I want to say it 63mm), you would need a 89-92 TPI style throttle body. A dual 58mm throttle body is pretty large, its equivalent to ~82mm circular Throttle Body.

I am not sure the Monoblade will help, I personally think their is a bigger restriction where the upper intake necks down just before it bolts to the lower intake.

 

[Loeryder]

Re: So How Big

Stock is 48mm for sure.

There is a company that will bore a stock TB out to twin 52 for less than $200.
***Edit-***** here is his NEWEST site!
http://www.xtremefi.com/QA.htm

Also, his site says he will do a group buy on anything more than 3 units.
If there are enough folks interested we could probably get a better price.


That is the route I am gonna go.

TurboTime does sell the BBK TBs for a sweet price.

 

[DynaGlide]

Re: So How Big

http://users3.ev1.net/~thor10/tbodytest.htm

You can get in contact with the HPGuy here. Good luck. I have one of his units... good stuff.

 

[kessler]

Re: So How Big

So let me get this straight, The recomandation is not to get the 58mm Becuz its to much? Cuz Im building my TY right now and i have a good build on my hands i think,

Vortech heads with 2.02/1.60
Comp 415 cam
Pistons rods
PTE-63
3k stall
Built tranny
Front Mount
50lb injectors
Mega Squirt
pluse a few small things

So do you all think that its a little to much for what im running.

 

[jjorgensen52]

Re: So How Big

My build is more or less the same, and I've got the 58's ... but, haven't got it finished yet so I can't help you yet

 

[NecroWolf]

Re: So How Big

not to hijack it but i hope to see a good write up on the megasquirt install

 

[dgoodhue]

Re: So How Big

The recomandation is not to get the 58mm Becuz its to much? Cuz Im building my TY right now and i have a good build on my hands i think,

Vortech heads with 2.02/1.60
Comp 415 cam
Pistons rods
PTE-63
3k stall
Built tranny
Front Mount
50lb injectors
Mega Squirt
pluse a few small things.

I wouldn't do a mono blade (I think they flow 1300cfm vs 58mm which is supose to 1000cfm)

My comments are really from apply 350 Throttle body info. You may want to try a 52mm, but I am really only speculating. I haven't seen anyone do back to back testing with throttle bodies on SyTy. With a larger throttle body, you also need to port the intake opening to match the throttle body or you wasting your money. Some of the faster trucks may have better info results or comparisons.

 

[kessler]

Re: So How Big

Well i know JLOW on here and his is going to be the first MegaSquirt install so im sure either myself or Justin will let everyone know and ill be sure to get all the Specs for a base set up.