Throttle Body ?'s--->TONY????? - Toyota Nation Forum : Toyota Car and Truck Forums

racerhex · 09-26-2003, 07:39 AM

Hey I was wondering since Tony is the only one I know that did this....can I bore/hone my TB like you did on my 3vz? Did you run across any probs? Feel any gains? How did you come up with your size to bore it to?

Also you have to get a larger flaper(butterfly valve) right? If so where did you get it?

Just a bunch of questions because I was thinknig of doing the same....I would really appriciate it if you could hook me up with this info. thanks!!!!

Any one else is welcome to answer if you know it!

racerhex · 09-26-2003, 12:37 PM

come on Tony!!!!

***zoni*** · 09-26-2003, 01:29 PM

get a bigger one bro... ive heard of people getting infinity i30 ones i think... when i do mine im gonna grab a mk3 supra throttle body, and just adapt it to work, however i need to.

racerhex · 09-26-2003, 01:30 PM

Yeah I would feel more secure using my origonal parts though!!!!

***Tony the Tiger*** · 09-26-2003, 01:51 PM

Hey Racerhex, you can go to almost any machine shop and they can bore out the TB and fabricate a matching butterfly. The prices are different from shop to shop, but the average price should be about $280-$350 CAD. The only possibly problem that can happen with an overbored factory throttlebody is the throttle plate sticking when it is fully closed. Some machine shops might not do as good of a job when fabricating the plate and sometimes the clearance between the plate and the throttlebody opening is too little --> The throttle plate will get stuck closed or gets very notchy when the car is cold. My Camry's TB was done very well, but my Integra's would sometimes stick during the winters.

Mine is bored out to 68mm... which is pretty big already. I find no benefits of swapping throttlebodies from another car or buying an aftermarket piece because there will be a million problems assosciated with swapping TB's. Idling issues and TPS issues are enough to drive you nuts (I speak with experience...haha )

racerhex · 09-26-2003, 02:14 PM

Well we are going to do it at my sponcers shop because he has a honing machine. Would u suggest boring myn at the same size or from experience would you go bigger or smaller? Also would making the flapper out of lighter material be benificial due to less weight to move? Also is there any adjustments that will have to be done to the cable or anything related to the TB change????

Also what other mods have you experienced as good gainers for the lil cash spent....like the TB mod???? Now that I have a shop at my dispense Im edgie and looking for lil gains to keep me busy till turbo is ready!

BTW Im cutting out un needed wait every where this is what keeps me on my toes!!! LOL... I feel some gains for every 50lbs or so...not enough to be a huge thing but Im going on around 400 lbs taken out...so hopefully I will see an improvment at the track!

xtychx · 09-26-2003, 08:37 PM

hey tony,

what kind of gains you feeling from the TB being bored out? You think it was worth the price?

-xtychx

Deuce · 09-26-2003, 10:49 PM

RacerHex

I checked your site and noticed your SE's weight is 2900 lbs. If its like my 93 DX it started out around 4100lbs right? What did you do to lower the weight almost 1200lbs?

phatboy555 · 09-26-2003, 11:09 PM

4100lbs...sick! i thought camry's were only in the 3000lbs range

and i read in another thread that he has maybe 400lbs taken out

Deuce · 09-26-2003, 11:13 PM

Quote:

Originally posted by phatboy555
4100lbs...sick! i thought camry's were only in the 3000lbs range

and i read in another thread that he has maybe 400lbs taken out

Yeah I was surprised when I checked the door panel on mine and saw 4137 lbs. I hope I read it wrong, especially since most other 4 door midsize imports weigh a helluva lot less than that for that model period.

TypeZer0 · 09-26-2003, 11:21 PM

maybe you read the weight of the car plus fuel plus 4 adult passengers of average weight....just a thought. i think they should be 3100 to 3300 pounds

***Ratko*** · 09-27-2003, 12:18 AM

Just wanna make it clear that without the driver - the Camry isn't over 3,200 pounds give or take a bit depending on trim and options.

***Tony the Tiger*** · 09-27-2003, 03:00 AM

Hey Racerhex, my TB was basically bored to the largest size possible. The throttle plate must be machined to perfect clearances... that's the main concern. A lighter plate will do nothing, unless you have such a weak left foot that you can't even crack open a throttlebody

You are better off changing to a lighter retracting spring if you want a lighter throttle feel.

Other than that, everything should bolt-up just like a stock throttlebody. The TPS will have no change at all, and everything will work like stock.

You are more likely to gain engine response rather than overall power after a throttlebody upgrade. This increase in engine response will help your engine accelerate faster between shifts or during sudden mash of the gas pedal --> faster acceleration times

Don't expect too much though because your motor is still relatively stock.

Anyway, taking out 400 lbs out of the Camry will put it to 2500-2600 lbs... That would be quite hard to achieve. A 2500 lb weight is the weight of an EK Civic hatchback and lighter than an Integra Type-R, and that isn't going to happen with a 4 door midsized Camry and a V6 motor.

Weight reduction is very simple at its initial stages.... spare tire, seats, unnecessary items and tools, and basic bolt-one (intake pipe vs stock intake and junk, lighter exhaust manifolds vs stock cast steel, etc...) Those are the easy 100-150 lbs and you can definitely feel a difference in all categories -- acceleration, traction, braking and steering response.

Next step would be gutting the sound deadening. Afterwards, it will be interior -- remving door panels, sound system (speakers), and interior panels. Those are the harder, but still free 50-60 lb weight saving.

All the above items are roughly 200-250 lbs or so. After shedding those easy pounds from the items above, there isn't really much left. In my opinion, stripping 400 lbs off the Camry isn't possible unless you get into lightweight parts -- lexan windows, lightweight seat, forged wheels, no side impact beams, and bumper reinforcement. etc... But after removing those safety components, you will need a rollcage, which adds 120-200 lbs back into the equation. It's not easy stripping big chunks of weight, and 400 lbs is A LOT for a 3000 lb car to start with!

racerhex · 09-27-2003, 07:01 PM

THanks so much for the help Tony I will hopefully get it done next weekend because I really want it but the guy had a show to go to this week so we had to stop progress on my car.

About the weight though I would have to disagree. With taking all sound equipment, ac, all seats, the large spare tire, all car panels, and verthing else I have plus when I get ready I will be cutting out floor metal and replacing with CF.....only in places where it will not weeken the structure. I guaranty that 400lbs can be done. And im almost there but then again the roll cage will add a bit more if I decide to go that route. But I will have proof of the weight soon!

Thanks again man and I will let you know how it goes!

phatboy555 · 09-27-2003, 08:33 PM

and tony, you forgot to mention the seats and what not you can take out and/or replace with lighter racing seats...

a fully gutted interior should be able to let you lose more than 200lbs, 400 is really pushing it but from what i remember, racerhex is the one who is going to weld his back doors shut so i don't think he really worries too much about daily driveability as this will be a racing car...i fully believe it can be done

and if the EK hatch is the 6th gen hatch, those are by far the fattest hb's...the 5th gen hatch (eg maybe) are the ones who are the light weight contenders (stock vx and cx only weigh in at 2000lbs (cx little more cause of different wheels))

lets not get started on those 1800lbs crx's though