C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

BBK 52mm

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Old Feb 23, 2008 | 07:53 PM
  #1  
raeke1's Avatar
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From: cost texas
Default BBK 52mm

are the worth a I have a tpis thorttle bodies 52mm is the bbk more to spec. this tpis when i cleaned it the idel went up to1200
in p the minimum idlle speed adout 1000 on good timing temp 220 at 6 btdc I have no base idel no vam leak check it white B12 and propane
check egr all good and p/m switch
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Old Feb 23, 2008 | 08:30 PM
  #2  
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Huh? Try again in english using complete sentences and punctuation.
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Old Feb 23, 2008 | 09:04 PM
  #3  
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all I can say is wow
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Old Feb 23, 2008 | 09:06 PM
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I have no idea what's going on.

I have heard that BBK TB's are not the best quality, if that's what you're asking...
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Old Feb 23, 2008 | 09:40 PM
  #5  
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Maybe!
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Old Feb 23, 2008 | 09:50 PM
  #6  
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I think he has a vacuum problem.....
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Old Feb 23, 2008 | 10:27 PM
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Since the original question does not resemble English I'll try this for an answer:

52MM TBs are a waste of time on these motors. You need about 500CI before it becomes an issue.
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Old Feb 23, 2008 | 11:34 PM
  #8  
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Default let try it agend

Are the BBK 52mm thorttle body in spec? On my 85 now is a tpis came
with vett. Cleaned it. NOW idel is high.
Check .
1. vacuum leak with
B12 & propane no leak.
2. Timing 6 BTDC
3. EGR valve & Control Solenoid
4. P/N Switch
5. ICA try a minimun idel speed aujustment to high about 1200
RPM in Park & Drive about 850 nogo.
SO I think my TPIS has gone south.
I do not want to pay $350.00 for A POS!!!!
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Old Feb 23, 2008 | 11:38 PM
  #9  
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can not find a stock 48mm thorttle body!!!!
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Old Feb 23, 2008 | 11:45 PM
  #10  
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I have heard good things about Holley TB's. I just ordered a rebuilt unit off of eBay for $180 shipped. Has been bored to 52mm and new bearings inserted for the shaft. If all goes well, I'll be very happy with the price.
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Old Feb 23, 2008 | 11:47 PM
  #11  
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Originally Posted by raeke1
can not find a stock 48mm thorttle body!!!!
To suit what year model.
Always for sale on TGO.
http://www.thirdgen.org/techboard/en...rters-3-a.html
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Old Feb 24, 2008 | 12:42 AM
  #12  
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Default Maybe this will help in the future

Since I'm a first generation immigrant myself, I'm going to translate this into what I think he said since this approach used to help me personally. I'm NOT making fun of your writing but I hope this helps you in the future.

Let me try this again

Is a BBK 52mm throttle body worth the money I would spend on it?

I have a 1985 corvette which came with a TPIS brand throttle body.

After cleaning it, the idle is now higher than it was before.

So far, I've checked the following:.

1. I looked for a vacuum leak using B12 (??) & propane and found no leak.

2. I set the Timing to 6 BTDC

3. I checked the EGR valve & Control Solenoid (how?)

4. I replaced the P/N Switch (that shouldn't affect idle)

5. I reset the idle air control valve (IAC not ICA) and after doing that I ended up with an idle speed that was 1200 RPM in Park & around 850 RPM in gear . this is not good

SO I think my TPIS has gone south.

I do not want to pay $350.00 for A stock throttle body (which is not normally POS)

Jeeze I feel like EFI-CFI but again, this is meant to help so don't get upset.
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Old Feb 24, 2008 | 01:51 AM
  #13  
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Originally Posted by 96GS#007
Huh? Try again in english using complete sentences and punctuation.
You have entered a forum. Not to be confused with a chat room.
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Old Feb 24, 2008 | 09:19 AM
  #14  
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From: cost texas
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How did I checked the EGR valve & control solenoid?
With a vacum pump & Helm 85 shop manual.
Chart C-7 page 6E3-121
sorry adout the spelling I know it suck
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