Any scan results for ported TBs with MAF post removed? - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


Performance, Brainstorming & Tuning Talk about modifications, or anything else associated with performance enhancements. Have a new idea for performance/reliability? Post it here. No idea is stupid! (please use Detailing and Appearance for cosmetic ideas)

Reply
 
 
 
Thread Tools Search this Thread
Old 02-23-2007, 12:31 PM   #11
Junior Member
Posts like a Ricer Type-R
 
Join Date: Aug 2002
Posts: 10
Thanks: 0
Thanked 0 Times in 0 Posts
willwren is on a distinguished road
Default

Wow. I missed this one.

IF you have a 99 or newer MAF you may get away with it. My L67 did NOT like this mod at all. It flowed more than the stock MAF sensor could even read.

Throttle response is greatly improved by simply shaving the shaft flat on both sides and using counter-sunk screws. This kills some turbulence and opens up flow BEFORE the MAF sensor.

I still have my Maf-supportless TB from Zilla'* old Gen2 setup. It'* a good paperweight now.
willwren is offline   Reply With Quote
Old 02-23-2007, 12:37 PM   #12
DINOSAURUS BOOSTUS

Expert Gearhead
 
BillBoost37's Avatar
 
Join Date: Mar 2005
Location: Enfield, CT
Posts: 41,391
Thanks: 0
Thanked 0 Times in 0 Posts
BillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of light
Default

I'm thinking the 97 vs 99 are different to factor in the lack of support in the airstream. Wonder if anyone has the frequencies and we can get a comparison.
BillBoost37 is offline   Reply With Quote
Old 02-23-2007, 12:44 PM   #13
Junior Member
Posts like a Ricer Type-R
 
Join Date: Aug 2002
Posts: 10
Thanks: 0
Thanked 0 Times in 0 Posts
willwren is on a distinguished road
Default

Sounds like a custom tune to get the most out of it.
willwren is offline   Reply With Quote
Old 02-23-2007, 12:48 PM   #14
DINOSAURUS BOOSTUS

Expert Gearhead
 
BillBoost37's Avatar
 
Join Date: Mar 2005
Location: Enfield, CT
Posts: 41,391
Thanks: 0
Thanked 0 Times in 0 Posts
BillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of light
Default

Someone holler "Thomas" loudly..

Ben..I'm sure he'* seen some experience in the GP community.
BillBoost37 is offline   Reply With Quote
Old 02-23-2007, 12:59 PM   #15
Senior Member
True Car Nut
Thread Starter
 
Join Date: Jun 2004
Location: Glendale, AZ
Posts: 3,459
Thanks: 0
Thanked 1 Time in 1 Post
big_news_1 is on a distinguished road
Default

Lol... we don't need to pull Thomas in here yet. I know he has the capability to tune any TB I throw at this car, because he has a wideband O2 that we can put in the exhaust to get the A/F ratio down perfectly. So that'* not a problem. I just wanted to know if anyone had scanned their car before and after a ported TB and noted the MAF frequencies. Honestly I doubt the frequencies changed at all, but I thought it would be nice to check. It'* good to hear that Mike was able to dial in his LTFT after a heavily ported TB because it means overall the fueling was good despite the MAF being out of calibration. But like Bill W. mentioned, it does no good to outflow the MAF because you end up with a car sucking more air than it knows how to use.
big_news_1 is offline   Reply With Quote
Old 02-23-2007, 01:09 PM   #16
Junior Member
Posts like a Ricer Type-R
 
Join Date: Aug 2002
Posts: 10
Thanks: 0
Thanked 0 Times in 0 Posts
willwren is on a distinguished road
Default

Ben, one of the ZM test cars will be doing this very shortly. He already has on of my ported TB'* on the car, and stated he would be willing to go back to stock for some numbers.

Another L27 test car will be doing this shortly. MAF gm/sec data at 3 or 4 different rpm levels with the OEM TB, then swap and repeat.

Unfortunately, The other test cars haven't tested, but all did report a snappier throttle response. It'* interesting that the NA cars seem to have responded more, and feel they gain a bit on the top end at WOT. My own car wasn't tested for this, as I did a ported/polished SC and LIM at the same time as the 2nd 'test' TB. I still have that TB around here somewhere as well.

My Gen3 setup also netted no quantitative results, as I did other work at the same time.
willwren is offline   Reply With Quote
Old 02-23-2007, 01:18 PM   #17
Senior Member
True Car Nut
Thread Starter
 
Join Date: Jun 2004
Location: Glendale, AZ
Posts: 3,459
Thanks: 0
Thanked 1 Time in 1 Post
big_news_1 is on a distinguished road
Default

That would be great, Bill. I'm anxious to get a different TB on the car because I think it'* a restriction at this point. I have no hard data to back it up, but if you look at the burnout video after my trans swap you'll notice a slight delay between when I go WOT and when the engine spins up. My engine doesn't like to speed up in a hurry, so I was thinking a ported TB might alleviate some of the problem.
big_news_1 is offline   Reply With Quote
Old 02-23-2007, 01:31 PM   #18
Senior Member
Certified GM nut
 
Join Date: Dec 2002
Location: plattsburgh NY
Posts: 2,037
Thanks: 0
Thanked 0 Times in 0 Posts
TJ'sblackbonne is on a distinguished road
Default

I also feel my TB is a restriction. I think that a TB would help my 60'* alot and also help my trap speed. But at this point i just cant see spending $200 on a TB when i can get a HV3 for that price. Do you guys think i would see noticable gains from a ZZP stage 1 TB with my mod level?
TJ'sblackbonne is offline   Reply With Quote
Old 02-23-2007, 01:34 PM   #19
Senior Member
Certified Car Nut
 
Join Date: Jun 2003
Posts: 15,928
Thanks: 0
Thanked 0 Times in 0 Posts
BonneMeMN is on a distinguished road
Default

Dame do you still have the post-less TB from the 93?
BonneMeMN is offline   Reply With Quote
Old 02-23-2007, 01:39 PM   #20
Junior Member
Posts like a Ricer Type-R
 
Join Date: Aug 2002
Posts: 10
Thanks: 0
Thanked 0 Times in 0 Posts
willwren is on a distinguished road
Default

Most machinists probably wouldn't charge more than 50-60 bucks to shave the throttle shaft and countersink the holes for flat head screws like I do.

My pics are all the guide you need.
willwren is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
TBS or TNT.... petraman Lounge 8 06-15-2007 10:56 PM
MAF screen removed! rogers Performance, Brainstorming & Tuning 7 01-30-2007 01:02 AM
PICS!! Ported GEN III M90 until spring, then ported GEN V OLBlueEyesBonne Forced Induction 20 10-13-2006 03:55 AM
removed MAF screen and gutted air box mertis Performance, Brainstorming & Tuning 28 11-09-2003 06:58 PM
People with stock air boxes and MAF screen removed Burgundy_Boat General GM Chat 17 10-09-2003 09:22 AM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 08:59 PM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.