TBI Throttle Body Injection discussion and questions. L03/CFI tech and other performance enhancements.

Grinding TBI

Thread Tools
 
Search this Thread
 
Old 08-19-2005, 08:24 PM
  #1  
Supreme Member
Thread Starter
 
vorgath's Avatar
 
Join Date: May 2005
Location: San Diego, CA
Posts: 1,701
Likes: 0
Received 0 Likes on 0 Posts
Car: 1991 Camaro RS
Engine: LO3
Transmission: 700R4
Axle/Gears: 3.42 LS1
Grinding TBI

Doing the Ultimate TBI mods right now ... maybe 1/3 done after 5-10 minutes... since I cheated and used a bench grinder to grind down the sides

Will post some pics once I'm done
Old 08-19-2005, 10:46 PM
  #2  
Junior Member
 
STRIFE69's Avatar
 
Join Date: May 2005
Location: tampa florida
Posts: 65
Likes: 0
Received 0 Likes on 0 Posts
Car: 91 camaro
Engine: 305TBI
Transmission: 5 speed
Wouldn't say that was cheating just using available tools around you. Good luck on the rest of your TB.
Old 08-20-2005, 12:36 AM
  #3  
Supreme Member
Thread Starter
 
vorgath's Avatar
 
Join Date: May 2005
Location: San Diego, CA
Posts: 1,701
Likes: 0
Received 0 Likes on 0 Posts
Car: 1991 Camaro RS
Engine: LO3
Transmission: 700R4
Axle/Gears: 3.42 LS1
hrrrmmmmm

*mumbles something about lousy grinding stones*


But in order to finish it I gotta get some better grinding stones ... *lol* ...


Oh btw.... how strong is the TBI .. really ? Because I noticed I don't have a lot of thickness right in the area where I need to grind the TBI in order to move the injector housing up a little bit ... so the fuel lines will clear

Reason I'm asking is.. I saw a TBI at the junkyard... snapped.. in half !! *lol* never seen one like that before *lol*
Old 08-20-2005, 02:42 PM
  #4  
Supreme Member
Thread Starter
 
vorgath's Avatar
 
Join Date: May 2005
Location: San Diego, CA
Posts: 1,701
Likes: 0
Received 0 Likes on 0 Posts
Car: 1991 Camaro RS
Engine: LO3
Transmission: 700R4
Axle/Gears: 3.42 LS1
Part 1

http://www.geocities.com/olafpodolak/TBIpart1.jpg


Still got a bit to go before I'm done
Old 08-21-2005, 04:08 PM
  #5  
Senior Member

iTrader: (2)
 
weberflorida's Avatar
 
Join Date: Mar 2003
Location: Hughesville MD
Posts: 539
Likes: 0
Received 0 Likes on 0 Posts
Car: 1991 Camaro Z28
Dude that is looking sweet. I have been thinking of doing them myself. So let me know how much of a difference it makes. Sorry I have not responded in a while I just got back in town from Seattle.
Old 08-21-2005, 04:49 PM
  #6  
Supreme Member
Thread Starter
 
vorgath's Avatar
 
Join Date: May 2005
Location: San Diego, CA
Posts: 1,701
Likes: 0
Received 0 Likes on 0 Posts
Car: 1991 Camaro RS
Engine: LO3
Transmission: 700R4
Axle/Gears: 3.42 LS1
Not yet

Not done yet ... been having problems with my dremel attachments ... *lol*

I want to grind it some more though ... almost like half between boring out and chamfering


Garage's a mess so I can't find half of my tools *lol*
Old 08-21-2005, 07:37 PM
  #7  
Supporter/Moderator

iTrader: (7)
 
ShiftyCapone's Avatar
 
Join Date: Feb 2001
Location: Cincinnati, OH
Posts: 13,207
Likes: 0
Received 375 Likes on 288 Posts
Car: '90 RS
Engine: 377 LSX
Transmission: Magnum T56
Your progress looks good so far. I wouldn't grind anymore but instead take some sand paper and smooth out the rough edges. That will improve its asthetics a bit. I beilive this mod increases flow by 4% or so but your motor isn't air limited at this time. You therefore won't feel any difference in the but dyno.
Old 08-21-2005, 08:17 PM
  #8  
Supreme Member
Thread Starter
 
vorgath's Avatar
 
Join Date: May 2005
Location: San Diego, CA
Posts: 1,701
Likes: 0
Received 0 Likes on 0 Posts
Car: 1991 Camaro RS
Engine: LO3
Transmission: 700R4
Axle/Gears: 3.42 LS1
Yup

Agree.. I got some nicks and nacks there ... need to do some serious sanding ..... may have to do it by hand though because I don't have a the mandrel for the longer tapered sanding cones ya use for porting heads and manifolds
Old 08-21-2005, 11:31 PM
  #9  
Senior Member

iTrader: (2)
 
weberflorida's Avatar
 
Join Date: Mar 2003
Location: Hughesville MD
Posts: 539
Likes: 0
Received 0 Likes on 0 Posts
Car: 1991 Camaro Z28
good luck
Old 08-22-2005, 04:37 PM
  #10  
Supreme Member
 
Benm109's Avatar
 
Join Date: Feb 2004
Location: Greenville, SC
Posts: 1,231
Likes: 0
Received 1 Like on 1 Post
Car: 1991 Chevy Camaro
Engine: 305 TBI
Transmission: 700R4
Axle/Gears: 3.42
need to do some serious sanding
It actually doesn't take as long as you might think. It only took me about 2 hours and some light sanding with 220 grit to get all the nicks, cuts, and imperfections out, and have it all nice, smooth, and shiny .
Old 08-22-2005, 08:32 PM
  #11  
Senior Member

iTrader: (2)
 
weberflorida's Avatar
 
Join Date: Mar 2003
Location: Hughesville MD
Posts: 539
Likes: 0
Received 0 Likes on 0 Posts
Car: 1991 Camaro Z28
Two hours is not bad. How did that help your performance?

Bill
Old 08-23-2005, 12:04 AM
  #12  
Supreme Member
Thread Starter
 
vorgath's Avatar
 
Join Date: May 2005
Location: San Diego, CA
Posts: 1,701
Likes: 0
Received 0 Likes on 0 Posts
Car: 1991 Camaro RS
Engine: LO3
Transmission: 700R4
Axle/Gears: 3.42 LS1
*lol*

Well I got some serious cuts in it *lol* but yeah I may just do it on a lunch break or something *lol*
Old 08-23-2005, 04:13 PM
  #13  
Supreme Member
 
Benm109's Avatar
 
Join Date: Feb 2004
Location: Greenville, SC
Posts: 1,231
Likes: 0
Received 1 Like on 1 Post
Car: 1991 Chevy Camaro
Engine: 305 TBI
Transmission: 700R4
Axle/Gears: 3.42
How did that help your performance?
My performance? Not much, to be honest. With the ultimate TBI mods, injector spacer, and FP slightly increased, I felt a little difference in the top end, but that's about it. But, as we all know, the butt dyno isn't very accurate.

And of course, the ultimate TBI mods won't make much of a difference on a stock or low performance engine. I still think it's worth doing though, if you have the tools and the time.
Old 08-23-2005, 07:43 PM
  #14  
Senior Member

iTrader: (2)
 
weberflorida's Avatar
 
Join Date: Mar 2003
Location: Hughesville MD
Posts: 539
Likes: 0
Received 0 Likes on 0 Posts
Car: 1991 Camaro Z28
Yeah right on man. I have thought about doing them just haven't had the time to take the car off the road. I am considering getting a junkyard piece and working one of those though then when it is done swapping it on the car in a few minutes.
Old 08-24-2005, 03:54 PM
  #15  
Supreme Member
 
Benm109's Avatar
 
Join Date: Feb 2004
Location: Greenville, SC
Posts: 1,231
Likes: 0
Received 1 Like on 1 Post
Car: 1991 Chevy Camaro
Engine: 305 TBI
Transmission: 700R4
Axle/Gears: 3.42
I have thought about doing them just haven't had the time to take the car off the road.
I highly recommend doing it that way. That way you can really take your time with it and not have to worry about breaking anything, losing or missing parts, time-constraints, etc. And, you'll also have extra parts just in case you do break something.

I have 2 spare complete TBI units in the garage just for parts and/or just tinkering with.
Old 08-24-2005, 05:30 PM
  #16  
Supreme Member
Thread Starter
 
vorgath's Avatar
 
Join Date: May 2005
Location: San Diego, CA
Posts: 1,701
Likes: 0
Received 0 Likes on 0 Posts
Car: 1991 Camaro RS
Engine: LO3
Transmission: 700R4
Axle/Gears: 3.42 LS1
Yup

I need to go and get me some spare parts .. like 3-4 IAC's and TPS's *lol* keep them around just in case .. besides they uhmmm are real cheap at junk yards due to their size
Old 08-24-2005, 06:17 PM
  #17  
Senior Member

iTrader: (2)
 
weberflorida's Avatar
 
Join Date: Mar 2003
Location: Hughesville MD
Posts: 539
Likes: 0
Received 0 Likes on 0 Posts
Car: 1991 Camaro Z28
What do you think they would cost? I mean like junkyard or ebay?

Thanks

Bill
Old 08-24-2005, 07:38 PM
  #18  
Supreme Member
Thread Starter
 
vorgath's Avatar
 
Join Date: May 2005
Location: San Diego, CA
Posts: 1,701
Likes: 0
Received 0 Likes on 0 Posts
Car: 1991 Camaro RS
Engine: LO3
Transmission: 700R4
Axle/Gears: 3.42 LS1
junkyard

20-30 bucks at a junkyard

30 some bucks for the rebuild kit
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
InfernalVortex
Electronics
10
04-20-2021 11:31 AM
Falcon50
DFI and ECM
81
08-22-2020 03:26 PM
armybyrd
Carburetors
3
10-20-2015 03:57 AM
rs_z28_vert
Engine/Drivetrain/Suspension Wanted
6
09-30-2015 09:47 PM
Gordonr1973
Electronics
0
09-29-2015 11:59 AM



Quick Reply: Grinding TBI



All times are GMT -5. The time now is 10:21 PM.