87350IROC

iTrader: (2)

Hey guys,

I just picked up a 58mm throttle body from TPIS. The workmanship on it looks really nice, so I thought I'd share some pictures. There aren't enough quality product pictures on this site.

I'll have this thing installed in a few weeks and will let you know what I think.













The throttle body polished up real nice too. I'll have some pics of it polished soon.

Tony89GTA

iTrader: (7)

Must say I'am quite impressed

Shadygrady

iTrader: (3)

The TPIS TB is a nice looking TB but for what it is you could have had one for much cheaper.http://www.summitracing.com/parts/SUM-227703/?rtype=10.
I realize the summit one is cast but its hard to argue with the price when it performs the same function as the TPIS one for more than $100 less.
What other mods do you have to go with this TB?If its basically stock engine you prolly wont see/feel much difference,if any.The stock TB is good for 400 hp or more.
Not trying to burst your bubble or be a jerk.just saying...
It even says on TPIS website that the TB works great on engines making 480-600 hp.Thats A LOT more power than your average thirdgen is making.

87350IROC

iTrader: (2)

I feel I get my $140 difference worth. The way I see it I'm paying for:

Made in USA
Billet construction quality
improved styling
hopefully better throttle action
integrated TB coolant delete (very cool feature, no more capped ports)

I can understand why some people don't think these features are worth $140. Call me particular.

I think it will help wake up my stock 305.

87350IROC

iTrader: (2)

I spent about 20 minutes last night hand polishing this thing. I'm happy with how it came out.

Shadygrady

iTrader: (3)

To each his own.

So you have a 305?Your profile says 5.7?Well,plus your name lol.I cant see it helping either.I just think you could have bought something that actually helps make power.I`ve heard of quite a bit of tuning issues with the 58 as well.

It is a nice piece however.

87350IROC

iTrader: (2)

I was kidding. Based on my calculations, the increase in throttle body size should net about 5hp on my engine.

This is on a fairly healthy 350.

Shadygrady

iTrader: (3)

I`m really not trying to bust your b@lls im just having a tough time understanding.For about what you spent maybe a little more I could add 150 hp to my engine.Thats what im having a tough time wrapping my head around.

87350IROC

iTrader: (2)

I assume you are talking nitrous. First of all I seriously doubt you can put together a nitrous setup for $400 with new parts. Regardless, nitrous is useless to me. My car serves two purposes to me:

Weekend street car
Track day car

Nitrous doesn't help me achieve my goals for either.

Have you ever seen the look on a Vette, 911, M3 driver's face when you pass them at the track in a very stock looking '87 Camaro? I have, its priceless. That is what this car is all about. Hopefully this TB will help me get a little closer to my ultimate goal of 996 TT track performance. I have exhausted most of the easy HP mods other than FI.

I also appreciate a very clean looking engine bay. This piece certainly does a better job in that regard than the stocker.

Shadygrady

iTrader: (3)

I understand.My car looks like a very stock 87.What other mods are you running since N2O wont help you.I did say a little more than you paid.This one, Nitrous Oxide Systems (NOS) 05151NOS - NOS EFI Nitrous Oxide Systems , should put me well into the 1/4 mile times your talking about for about $170 more than the TB.Why buy new when used works just as well.Guess were just in 2 completely different tax brackets though.I`ve never raced a vette,911 or M3 at any of the tracks here.I`d just like to see n/a 12`s and whatever i can get off the giggle juice.
I was mainly trying to help on the expense thing but if your not on a budget thats cool.If you can pass a Z06 ora 911 996TT in a tpi 3rd gen MY HATS OFF TO YOU!

luvofjah

iTrader: (2)

The part looks nice...

That being said, I will never spend another penny with that company...
They lied to me repeatedly about my order & even yelled at me over the phone....

87350IROC

iTrader: (2)

I'm pretty much already there in the turns, its the long straights where I need some extra help to keep up with the big boys.

My engine is a pretty typical 355TPI. Trickflow heads, edelbrock intake manifold, AS&M runners, SLP headers, ZZ4 cam, ect.

That and I've pretty much replaced every suspension, steering, and brake part on the car.

I'm not married, i don't have kids, no car payments; that allows me to sink more money into the hobby the most. No always the smartest thing to do, but its fun.

87350IROC

iTrader: (2)

Interesting, I have had a good experience with them so far.

ls1>*

iTrader: (32)

i thought they were anodized from tpis in black now?

87350IROC

iTrader: (2)

They are anodized what they call Plutonium. Which looks like a blue-gray to me. Anyway, I didn't like the color, so they sold me one in raw billet.

383RAT

I would disagree about it being worth the savings. I bought the summit throttle body and I wish I didn't. The machining tolerances are quite poor. The part even had a disturbing safety problem. At wide open throttle the spring tip end would wedge under the throttle body linkage stop which would hold it wide open momentarily. Also the top plate holes did not line up well with the main body.

I do agree 58 mm is really not needed until 400 plus HP

87350IROC

iTrader: (2)

Depends what you're after. If you're trying to squeeze every last HP out of an engine, then its worth it. Plus why not get the 58 if you're buying an aftermarket TB anyway.

ls1>*

iTrader: (32)

i plan on doing a 58 mm just because i dont ever want to have to buy one again... I will port the crap out of the intake and open it up... It wont make much more power and im aware of it, but if i ever go crazy with the engine, I wont have to sell a throttle body and buy another.

and i will do the tpis unit. Ive seen some of the problems mentioned above.

ls1>*

iTrader: (32)

was there any price difference in doing the raw billet?

87350IROC

iTrader: (2)

Same price.

383RAT

Well in a stock TPI motor an oversized throttle body shouldn't cause much problem in a mass air flow equipped 3rd gen. The ECM should be able to over come any issues since it does trim the fuel based on the measurement of the actual density of the air.
Now in the 3rd gens with speed density control the behavior of the vacuum changes a little bit with a oversized throttle body. Since the fuel in a speed density is set up on vacuum chart inside the ECM the feedback control of fuel trim parameters in the ECM may not be sufficient to get injector pulse correct for an ideal air-fuel ratio, BUT in general fuel injected cars are very tolerant of oversized throttle bodies. The worst thing I can for see is a very slight under performance at very low rpm and / or emissions being out tolerance at low rpms.
So in conclusion is it needed for a car under 400 hp No
Does it really cause a problem for this person to use such a large throttle body IF his motor is still stock Not really
Is it a good idea to buy such a large throttle body now and use it if you have plans to do more performance upgrade Yes

87350IROC

iTrader: (2)

Guys,

I didn't intend this to start a discussion of the value of a 58mm TB vs stock. I merely wanted to provide my experience with this product.

With that said, my engine is hardly a stock 350. I would not consider spending hard earned money on a TB for a stock engine. In fact this is the last piece of my engine that was stock.

Its easy to calculate the HP you are losing with you current TB. Use this information to decide if an aftermarket TB is worth it to you.

383RAT

It is a very nice looking throttle body I have there mini-ram intake myself. Probably should have bought their throttle body too. I wonder if they still make that 1000 cfm single vane throttle body

Shadygrady

iTrader: (3)

Good to know.Were you able to correct it or return it?I would guess the trickflow tb would have the same issues since trickflow and summit seem to be one in the same.The funny thing is summit has the trickflow in their latest catalog but it will not come up on the website if you put in the part number.

Ive also just heard too many bad things lately about tpis quality,customer service after the sale ,and standing behind their products with unhappy customers.The TB does look to be a very nice unit.Post up your results after the install.

Sorry to the OP for jacking his thread or getting it off course.Was just trying to help with a cheaper alternative and didnt realize you had exhausted most other bolt on mods.I`ve just seen a lot of guys try this for one of their first mods in which case the money would be better spent elswhere

MotorMouth

It's 1250 cfm now. http://www.tpis.com/parts/view/46

1989GTATransAm

iTrader: (3)

That is a nice looking throttle body. I can see why you bought it with future mods in mind. By the way it won't hurt a thing on what you are now running.

RevItUpZ28

iTrader: (1)

That polish job looks awesome! I really like that IAC housing also.

ls1>*

iTrader: (32)

i agree... makes me think about if i want one the same way... but then that means im polishing an intake and runners

irocman88

Nice looking tb man.... Oh and just to put my .02 in on this discussion.... Back when my car had the tuned port 305 in it, I did a 58mm TB, ported the plenum, and put slp runners on. Definitely noticed a seat of the pants difference. Yes, there's other stuff you could do for the money... but if you don't want to spray your car or tear into the engine, getting air in is just as important as getting it out

DJP87Z28

It will make a nice paper weight.....

87350IROC

iTrader: (2)

If you are implying its useless as a TB, then I need you to elaborate.

If you're just being funny, and mean it WOULD make a nice paper weight, then I agree.

DJP87Z28

Both of your replies......

87350IROC

iTrader: (2)

Come on DJP, if you have some information I need to know, please share.

burnout88

Thanks for posting the pic's. Looks like a really nice high quality piece. I have a stock TB that was ported by TPIS to 52mm and it was very nicely done. Based on the quality
I would say that is definitely worth the money!!

There is a very weird attuide on this board that bolt on parts are all worthless and I have no idea why. I think it is all the kids on the board who just cannot afford any actual parts and most of there cars are barely worth $400.

87350IROC

iTrader: (2)

Guys I finally got this thing installed about 2 months ago along with a T56.

The TPIS TB lugs do NOT line up well with the early style throttle cable. It is obviously optimized to be used with the later "barrel" style throttle cable. So I swapped my throttle cable for the newer style and it works much better. With the newer style cable, it does raise the gas pedal position slightly. This is actually good for me since it eliminates the sensation that the gas pedal is flat on the floor at WOT. A better feel for me.

It has not negatively affected idle or low rpm operation. I notice no difference here. As for more power? Hard to say since I swapped in a T56 at the same time. It can't hurt thought. I have no remorse with this product.

383RAT

[QUOTE=Shadygrady;4709522]Good to know.Were you able to correct it or return it?

I decided to just fix the problem myself with a file. The spring no longer sticks into the full open stop. Now that the car is running I can not get it to idle bellow 800 rpm with the throttle blades fully closed and the IAC fully closed. Thought I had a vacuum leak so I pulled the intake to inspect. I found nothing unusual. I put the intake back on same results. I guess the throttle body lets a lot of air through even a full closed.

SixSeriesCSi

iTrader: (11)

I saw some photos of this Throttle Body on a LS1Tech and was SOLD! I stumbled across this thread after some searching and it really helped to reaffirm my purchase.

Me too!

I can't understand how some people don't think those features are worth the money, Made in the USA!

Hand Polish, WOW!

The one I saw over at LS1Tech was also Raw Billet so I ordered mine the same way! Say No to 'Carbon Black' Anodizing.

I'm going to have mine polished too! I had a TPIS Billet IAC Housing installed on my 52MM AS&M Throttle Body.

DAMN! That's Nice!!

Spark Plug Wires are nicely routed with clips, what brand are the Spark Plug Wires? Valve Covers accentuate the Plenum and vise-versa, Very Nice Touch! I really like how all the Wires and Vacuum Lines are nicely wrapped, that's probably my favorite little touch.