Gutted IM testing - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


General Miata Chat A place to talk about anything Miata

Reply
 
 
 
LinkBack Thread Tools
Old 06-30-2012, 06:39 PM   #1
Elite Member
Thread Starter
iTrader: (17)
 
Join Date: Aug 2007
Location: Fort Myers, FL
Posts: 2,791
Total Cats: 130
Default Gutted IM testing

I've seen a lot of talk about gutting the 99/00 intake manifolds and not all that much as far as testing/numbers. Figured I would post up my results, incase anyone is interested.

First off, it's a massive pain in the *** to gut this thing. I can't even imagine how many hours have gone into this thing and it's really not done, I just couldn't take it anymore. We gutted the top and bottom, and deleted the VICS butterflies. I dremmeled off the casting bumps the last inch or so before the head, but the runners are otherwise untouched (I just didn't have anything I could get to them with).

Weight comparisons, the stock manifold weighted 16.25lbs the gutted manifold weighed 12.96lbs. So we removed a little over 3.25 pounds of aluminum from the thing.

Both:


Gutted:


Stock:


I took 3 datalogs of each, all 3rd gear pulls, all in similar conditions on the same day and loaded them in virtual dyno. These were the most representative runs of the 3 pulls with each setup. Stock manifold with VICS working (red) vs Gutted Manifold (blue)



Overall, I'm really happy with the top end gains and very little loss on the low end. It's a great $/hp if you've got the time and means to do it yourself, but if you factor in the labor it's pretty horrible.
Attached Thumbnails
Gutted IM testing-100_2768.jpg   Gutted IM testing-100_2770.jpg   Gutted IM testing-100_2769.jpg   Gutted IM testing-guttedim.jpg  
pdexta is offline   Reply With Quote
Old 06-30-2012, 06:56 PM   #2
Tour de Franzia
iTrader: (6)
 
hustler's Avatar
 
Join Date: Jun 2006
Location: Republic of Dallas
Posts: 29,114
Total Cats: 351
Default

I had John polish mine but I kept the long runners. I have no data. Thanks for doing this.
hustler is offline   Reply With Quote
Old 06-30-2012, 07:07 PM   #3
Senior Member
iTrader: (8)
 
Join Date: Jun 2010
Location: Navarre, FL
Posts: 1,127
Total Cats: 39
Default

thanks for doing this. not a bad gain, just time consuming it would seem
aaronc7 is offline   Reply With Quote
Old 06-30-2012, 08:07 PM   #4
Junior Member
 
Join Date: Jan 2005
Location: Fort Worth, Texas
Posts: 242
Total Cats: -1
Default

01-05 the same?
fwMiata is offline   Reply With Quote
Old 06-30-2012, 08:25 PM   #5
Slowest Progress Ever
iTrader: (26)
 
thirdgen's Avatar
 
Join Date: Oct 2007
Location: The coal ridden hills of Pennsylvania
Posts: 5,806
Total Cats: 183
Default

I gutted mine as seen here at the end of the thread...
https://www.miataturbo.net/engine-pe...-intake-64204/
but I am running a small turbo and have no data on numbers.
Thanks for this.
I am also running the VICS, I only gutted the upper plenum.
thirdgen is online now   Reply With Quote
Old 06-30-2012, 10:28 PM   #6
Murderator
iTrader: (76)
 
18psi's Avatar
 
Join Date: Apr 2008
Posts: 36,185
Total Cats: 2,582
Default

Thank you for posting pics and results. So you traded some torque for some power. Not bad considering you gained significantly more power.

And no, the 01-05 is not the same.
18psi is offline   Reply With Quote
Old 07-01-2012, 08:49 AM   #7
Elite AbsurdFlow Member
 
Laur3ns's Avatar
 
Join Date: Mar 2008
Location: Enschede, NL
Posts: 2,058
Total Cats: 11
Default

On the stock run, did VICS operate as normal?
Also, did you retune fuel and spark for each to maximize performance with each?
Laur3ns is offline   Reply With Quote
Old 09-21-2012, 04:16 PM   #8
Elite Member
iTrader: (2)
 
Join Date: Jan 2007
Location: Los Angeles, CA
Posts: 8,782
Total Cats: 119
Default

I have power building to 8000RPM with my gutted intake. Proven with my gt3071.
Faeflora is offline   Reply With Quote
Old 09-21-2012, 04:31 PM   #9
Murderator
iTrader: (76)
 
18psi's Avatar
 
Join Date: Apr 2008
Posts: 36,185
Total Cats: 2,582
Default

Sorry sweetie, you didn't prove jack isht. Before/after with as many variables identical is what people give a crap about, not you saying "well I didn't lose power so it must be working"......herp derp
18psi is offline   Reply With Quote
Old 09-21-2012, 06:06 PM   #10
Elite Member
iTrader: (10)
 
soviet's Avatar
 
Join Date: Jan 2010
Location: VA
Posts: 3,517
Total Cats: 257
Default

Wouldn't gutting a 2001-2005 manifold yield virtually the same results?

I have one laying around that I wouldn't mind butchering - seeing how they aren't as valuable as 99/00 VICS intakes.

edit: https://www.miataturbo.net/engine-pe...anifold-40844/
tl;dr **** that noise
soviet is offline   Reply With Quote
Old 09-21-2012, 06:12 PM   #11
Murderator
iTrader: (76)
 
18psi's Avatar
 
Join Date: Apr 2008
Posts: 36,185
Total Cats: 2,582
Default

Yeah no.

I has a spare 01 too that I'll be fuxorzing together with a hawnduhh one and hopefully gain good topendz...way later though
18psi is offline   Reply With Quote
Old 09-21-2012, 06:31 PM   #12
Elite Member
iTrader: (10)
 
soviet's Avatar
 
Join Date: Jan 2010
Location: VA
Posts: 3,517
Total Cats: 257
Default

I just feel like all work on stock manifolds is a giant circlejerk and would be way better off to just get a custom manifold made.
soviet is offline   Reply With Quote
Old 09-21-2012, 07:29 PM   #13
Elite Member
iTrader: (2)
 
Join Date: Jan 2007
Location: Los Angeles, CA
Posts: 8,782
Total Cats: 119
Default

Eat my *** vlad. Stock intake power takes a crap above 7000ish. Mine didnt an i had no boost creep. This was at 20psi on 3071.
Faeflora is offline   Reply With Quote
Old 09-21-2012, 07:33 PM   #14
Murderator
iTrader: (76)
 
18psi's Avatar
 
Join Date: Apr 2008
Posts: 36,185
Total Cats: 2,582
Default

Quote:
Originally Posted by Faeflora View Post
Eat my *** vlad. Stock intake power takes a crap above 7000ish. Mine didnt an i had no boost creep. This was at 20psi on 3071.
I don't have to baby.
Do you has dyno of your stocker taking a crap above 7k?
No?
Then stop being a fcking ratard.

Its not that I don't believe you or want to troll you, I promise you.
Its about me wanting to see actual results and you provide mind numbing retardation. Sorry bby I still <3 u doe

Quote:
Originally Posted by soviet View Post
I just feel like all work on stock manifolds is a giant circlejerk and would be way better off to just get a custom manifold made.
+2

I mean its probably good for something. Just not much, and def not worth the trouble imo.

If more people (like OP) keep testing this stuff and we have more data and I'm proven wrong, I'll gladly bust out my Fae autographed sawzall and go to work on my spare IM
18psi is offline   Reply With Quote
Old 09-21-2012, 08:27 PM   #15
Elite Member
iTrader: (2)
 
Join Date: Jan 2007
Location: Los Angeles, CA
Posts: 8,782
Total Cats: 119
Default

Search vlad you are trolling me. you know exactly what i am talking about. and who cares if it is back to back because unless you have boost creep your power will take a shiit with a stock manifold. over 8k

Anyways this is the ultimate intake ------s


Attached Thumbnails
Gutted IM testing-nofbm.gif  
Faeflora is offline   Reply With Quote
Old 09-21-2012, 09:01 PM   #16
Murderator
iTrader: (76)
 
18psi's Avatar
 
Join Date: Apr 2008
Posts: 36,185
Total Cats: 2,582
Default

Lmao...Show me dyno plots to prove it
18psi is offline   Reply With Quote
Old 09-27-2012, 06:18 PM   #17
Senior Member
iTrader: (2)
 
Join Date: Nov 2007
Location: Saint Paul, MN
Posts: 1,295
Total Cats: 22
Default

What turbo and how much boost were you pushing? A gain like that is worth my investing in a second IM if I can find one very cheap/free. I've got a lot of free time in the winter
Der_Idiot is offline   Reply With Quote
Old 09-28-2012, 03:02 AM   #18
Junior Member
iTrader: (2)
 
Join Date: Sep 2009
Location: singapore
Posts: 228
Total Cats: 2
Default

that's 25bhp lost at 4000rpm where you use everytime you drive.
Useful gain is after 5500rpm which you use less.
Unless it is a trackcar, would that be useful?
nismo502 is offline   Reply With Quote
Old 09-28-2012, 09:41 AM   #19
Elite Member
Thread Starter
iTrader: (17)
 
Join Date: Aug 2007
Location: Fort Myers, FL
Posts: 2,791
Total Cats: 130
Default

Quote:
Originally Posted by Der_Idiot View Post
What turbo and how much boost were you pushing? A gain like that is worth my investing in a second IM if I can find one very cheap/free. I've got a lot of free time in the winter
GT2871 .64ar @ 19psi

Quote:
Originally Posted by nismo502 View Post
that's 25bhp lost at 4000rpm where you use everytime you drive.
Useful gain is after 5500rpm which you use less.
Unless it is a trackcar, would that be useful?
Personally I don't drive around at WOT all day at 4000rpms. If I'm wanting the car to go fast, I pass 4000rpms one time, in 1st gear. After that I tend to stay toward the right side of the tachometer.
pdexta is offline   Reply With Quote
Old 09-28-2012, 11:22 AM   #20
Elite Member
iTrader: (2)
 
Join Date: Jan 2007
Location: Los Angeles, CA
Posts: 8,782
Total Cats: 119
Default

Quote:
Originally Posted by nismo502 View Post
that's 25bhp lost at 4000rpm where you use everytime you drive.
Useful gain is after 5500rpm which you use less.
Unless it is a trackcar, would that be useful?

You are a raging *****.
Faeflora is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Going back to stock. Need some 1.6 parts. Trent WTB 2 10-01-2015 01:15 PM
Low oil pressure after 1.8 swap and new turbo setup JesseTheNoob DIY Turbo Discussion 15 09-30-2015 03:44 PM
3rd Time's a Charm...hopefully. zephyrusaurai Meet and Greet 2 09-28-2015 11:59 PM
Are my coils failing? viriiguy General Miata Chat 5 09-28-2015 08:39 PM


Thread Tools

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 02:49 AM.