diy "turbo no hit block" '00 BP miata
#1
Junior Member
Thread Starter
Join Date: Nov 2013
Location: Sardinia, Italy
Posts: 396
Total Cats: 56
diy "turbo no hit block" '00 BP miata
Noticed I've never open a topic of my car...
short story here:
December 2013
miata is too slow, even if it's 1.8l
200.000+ km engine
saw mcm "how to turbo", they make it very easy
let's find out!
what I thought:
I want quick spool and low threshold, let's take an .35 turbine with .33 compressor!
why don't leave oem exhaust? it's turbo, exhaust line is less important than a NA engine!
wanna stay under 10psi, the i/c is only a good upgrade, but not necessary
dunno what a flow chart is
result:
first run... 1.5 bar wastegate and no emb, just oem ecu
ended......
one week later goes BOOOOOM
cylinder n°2 was prone to detonation
After that I began to read, I found the faq, I bought the corki bell's "maximum boost" and when my ideas began to be a little bit clearer (3 months later) I admitted that all that work was crap. Really crap.
Now the true diy project
I started my new project on april 2014
my new goals:
high boost threshold due to 10:1 CR
reason: reduce egt when non in boost, expecially because I ran LPG, less torque in boost but good power.
low boost, around 8 psi
compressor: high efficiency at high revs (4500 rpm and more)
I chose a chrubo based on GT2860R
manifold: studied for high speed gases, begi S4 shoud work for me.
expected power around 200-250 bhp
...continue
short story here:
December 2013
miata is too slow, even if it's 1.8l
200.000+ km engine
saw mcm "how to turbo", they make it very easy
let's find out!
what I thought:
I want quick spool and low threshold, let's take an .35 turbine with .33 compressor!
why don't leave oem exhaust? it's turbo, exhaust line is less important than a NA engine!
wanna stay under 10psi, the i/c is only a good upgrade, but not necessary
dunno what a flow chart is
result:
first run... 1.5 bar wastegate and no emb, just oem ecu
ended......
one week later goes BOOOOOM
cylinder n°2 was prone to detonation
After that I began to read, I found the faq, I bought the corki bell's "maximum boost" and when my ideas began to be a little bit clearer (3 months later) I admitted that all that work was crap. Really crap.
Now the true diy project
I started my new project on april 2014
my new goals:
high boost threshold due to 10:1 CR
reason: reduce egt when non in boost, expecially because I ran LPG, less torque in boost but good power.
low boost, around 8 psi
compressor: high efficiency at high revs (4500 rpm and more)
I chose a chrubo based on GT2860R
manifold: studied for high speed gases, begi S4 shoud work for me.
expected power around 200-250 bhp
...continue
#2
Junior Member
Thread Starter
Join Date: Nov 2013
Location: Sardinia, Italy
Posts: 396
Total Cats: 56
I found another BP with 80.000 km
changed timing belt and...
engine back in!
there isn't too much space for the downpipe
here neither
my new version of oil feed: copper hard line
chaos...
creating the downpipe: 60mm stainless steel
secondary water temp sensor
EGT k sensor
1° stainless reinforcement for chinese manifold
I/C piping
half way
toyota cops + dwell reducer (my pnp version)
cheers!
almost finished
finished!!!
First two days I setted the pressure to 4 psi: Funny to drive, but nothing else.
On the third day I setted the pressure to 9 psi (almost my goal) and the car was perfect!! As I wanted
2 problems:
first - oem injectors (cleaned and rebuilded) 100% opened to reach 12.5:1 afr at 5.500 rpm and 13.6:1 on the redline.
Back to 7 psi: 11:1 on maximum boost all the way till the redline. All you can pretend with oem injection system.
second - let me use an onomatopoeism for better understanding of the problem:
bruuuuAAAAAAA chochochochocho
bruuAAAAAAAAA chochochochocho
bruAAAAAAAAAA chocho SHHHHHHHHHHHHH
brubbrubbrubb potpotpot
sputter sputter sputter
I think I need a sequential bov...
Btw
I know it can be done better, but it's my first job, be patient...
Now boost threshold is 2.600 rpm, but I can reach 7 psi at 3.500 rpm
don't have spool data, I will write here soon.
...continue...
changed timing belt and...
engine back in!
there isn't too much space for the downpipe
here neither
my new version of oil feed: copper hard line
chaos...
creating the downpipe: 60mm stainless steel
secondary water temp sensor
EGT k sensor
1° stainless reinforcement for chinese manifold
I/C piping
half way
toyota cops + dwell reducer (my pnp version)
cheers!
almost finished
finished!!!
First two days I setted the pressure to 4 psi: Funny to drive, but nothing else.
On the third day I setted the pressure to 9 psi (almost my goal) and the car was perfect!! As I wanted
2 problems:
first - oem injectors (cleaned and rebuilded) 100% opened to reach 12.5:1 afr at 5.500 rpm and 13.6:1 on the redline.
Back to 7 psi: 11:1 on maximum boost all the way till the redline. All you can pretend with oem injection system.
second - let me use an onomatopoeism for better understanding of the problem:
bruuuuAAAAAAA chochochochocho
bruuAAAAAAAAA chochochochocho
bruAAAAAAAAAA chocho SHHHHHHHHHHHHH
brubbrubbrubb potpotpot
sputter sputter sputter
I think I need a sequential bov...
Btw
I know it can be done better, but it's my first job, be patient...
Now boost threshold is 2.600 rpm, but I can reach 7 psi at 3.500 rpm
don't have spool data, I will write here soon.
...continue...
#5
bruuuuAAAAAAA chochochochocho
bruuAAAAAAAAA chochochochocho
bruAAAAAAAAAA chocho SHHHHHHHHHHHHH
brubbrubbrubb potpotpot
sputter sputter sputter
This ^ lol
Cool build either way. Once I saw that mcm episode I was waiting for more builds to pop up.
Your 2nd time was very entertaining. Nice DIY setup, trial & error PSSHHHHHH 0psi
bruuAAAAAAAAA chochochochocho
bruAAAAAAAAAA chocho SHHHHHHHHHHHHH
brubbrubbrubb potpotpot
sputter sputter sputter
This ^ lol
Cool build either way. Once I saw that mcm episode I was waiting for more builds to pop up.
Your 2nd time was very entertaining. Nice DIY setup, trial & error PSSHHHHHH 0psi
#15
Junior Member
Thread Starter
Join Date: Nov 2013
Location: Sardinia, Italy
Posts: 396
Total Cats: 56
now I'm using the emanage blue (very low afr, -10° at maximum boost)
since I don't have a det-can the advance must be conservative, right?
I'm building one: when it's finished I put some photos here, and maybe a video if my gopro wants to record
very clear
I'm thinking to put an ms2 pnp from diyautotune, but I'm a little bit scared: I have to remap the entire range of the engine: vacuum, boost, idle, cold start, hot start, advance vs water temp, advance vs knock sensor and many other maps
I know that autotune helps a lot, but dunno if I can
since I don't have a det-can the advance must be conservative, right?
I'm building one: when it's finished I put some photos here, and maybe a video if my gopro wants to record
I'm thinking to put an ms2 pnp from diyautotune, but I'm a little bit scared: I have to remap the entire range of the engine: vacuum, boost, idle, cold start, hot start, advance vs water temp, advance vs knock sensor and many other maps
I know that autotune helps a lot, but dunno if I can
#16
I'm thinking to put an ms2 pnp from diyautotune, but I'm a little bit scared: I have to remap the entire range of the engine: vacuum, boost, idle, cold start, hot start, advance vs water temp, advance vs knock sensor and many other maps
I know that autotune helps a lot, but dunno if I can
I know that autotune helps a lot, but dunno if I can
#18
I've read though this thread a few times and I've almost posted every time. I have a love hate with it. He is doing some pretty impressive work with some pretty shitty parts. I'm not gonna lie. I want to see it go through its entire life cycle out of curiosity. We need weekly inspections with comments on miles driven & what not.
Having a proper ecu is pretty much mandatory with Turbo. It makes everything sooo much easier. Especially when your bandiads start failing and you have to troubleshoot that crap.
Also when I saw the DIY manifold I was like right on. Then you went rogue on us and ebayed it. That original manifold you made was probably fine just needed to be cleaned up a bit.
Having a proper ecu is pretty much mandatory with Turbo. It makes everything sooo much easier. Especially when your bandiads start failing and you have to troubleshoot that crap.
Also when I saw the DIY manifold I was like right on. Then you went rogue on us and ebayed it. That original manifold you made was probably fine just needed to be cleaned up a bit.
#19
OP, you are moving along a steep learning curve pretty well IMHO.
The funny thing is that a proper standalone ECU solution is often less difficult to work with than 'bandaid' or 'aids' solutions that simply fool the stock ECU.
My last project was far more difficult and frustrating with an SAFC based management setup than it was a programmable ECU that was very similar to the MS stuff. Plus that would let you get rid of the AFM, which is not doing you any favors.
Glad to see that you are now opening up the exhaust, as it is actually far more important for a turbocharged vehicles overall performance than most NA applications.
The funny thing is that a proper standalone ECU solution is often less difficult to work with than 'bandaid' or 'aids' solutions that simply fool the stock ECU.
My last project was far more difficult and frustrating with an SAFC based management setup than it was a programmable ECU that was very similar to the MS stuff. Plus that would let you get rid of the AFM, which is not doing you any favors.
Glad to see that you are now opening up the exhaust, as it is actually far more important for a turbocharged vehicles overall performance than most NA applications.