First OFFICIAL TWINCHARGED M20 BUILD

[downforce22]

Good information. I actually have that cx turbo back exhaust in waiting. Only thing I don't like is the fart can on the back.

I also have CX intercooler, CX piping and two exhaust manifolds, one being the one you posted above. From my reasearch on exhaust systems I am surprised to hear you like it, KAmotors. I know it clears the oil cooler and AC but it does not have equal length tubes. Care to comment?

The second manifold I have and want to use due to the strength and equal length runners, but need to modify to clear stuff, is this model:

[Denny]

Good information. I actually have that cx turbo back exhaust in waiting. Only thing I don't like is the fart can on the back.

I also have CX intercooler, CX piping and two exhaust manifolds, one being the one you posted above. From my reasearch on ecxhaust systems I am surprised to hear you like it, KAmotors. I know it clears the oil cooler and AC but it does not have equal length tubes. Care to comment?

The second manifold I have and want to use due to the strength and equal length runners, but need to modify to clear stuff, is this model:

CXracing has a good rep for sure.... cant wait to see if its really all good..not that I doubt but need to see with my own eyes. The manifold CXracing makes (second version) not only clears stuff better but is also to my opinions much stronger then the manifold with equal lenght runners in the pic you have up?!? the manifold is shorter, braced and just looks like it wont break in half...lol... no knock on the full lengh manifold..just my view..

[Denny]

cxracing's stuff really is the best of the ebay stuff, using the intercooler in my E30 and my WRX. The Intercooler's are hand welded,pressure tested and and signed off before shipping. That manifold works great and fits perfect.

I got there "same side Intercooler" in my pic from them too and it for sure looks like quality...heavy too.

[downforce22]

CXracing has a good rep for sure.... cant wait to see if its really all good..not that I doubt but need to see with my own eyes. The manifold CXracing makes (second version) not only clears stuff better but is also to my opinions much stronger then the manifold with equal lenght runners in the pic you have up?!? the manifold is shorter, braced and just looks like it wont break in half...lol... no knock on the full lengh manifold..just my view..

Surprisingly the ebay manifold is heavier than the cx racing manifold. It is also much larger. Mine has a brace welded onto it for strength.

The cx manifold has different length runners and does not have smooth transitions, as the flow collects it seems it would collide rather than come together to spin the turbo. The only things the cx manifold has over the ebay manifold is a wastegate provision and smaller tubes that would increase the air velocity and spin up the turbo quicker.

Just my thoughts having looked at them both.

[kamotors]

The cxracing manifold has smooth ports but not equal length(not that that matters for most). Depending on what dyno you look at I'm making 400+WHP just fine on it. Subaru's use extremely different length manifolds from the factory and work just fine and usually only gain about 10hp with an equal length setup.

I'm getting boost before 3k rpms and making plenty of power.

[Denny]

more intercooler work..

Lined up and bolted in place to get all the airflow possible...

started working on the new pipe routing... waiting on all the new couplers, reducers, pipes.. should be here soon...

Waiting on many parts but tomorrow I should receive all the turbo components cant wait!..

[Denny]

FEDEX just dropped 2 BIG boxes that weight 65 pounds... :)

I was very excited to receive the CXRACING turbo kit for the E30 for a few reasons... and one of them I couldn't wait to take out my magnifying glass and inspect the hell out of it to check out its quality construction... at first the metal is very heavy so good sign :)

I checked the flanges for straightness and thickness, welds, I have to admit that I am very surprised by the quality of all this stuff. I know a good weld when I see one and these welds are very very precise with almost perfect penetration and also the welds are grinded down nice and smooth and haven't seen any pin holes either.. (My old thermal research cat back for my old 91 Mitsubishi eclipse back in the day that cost 1500$ was not as quality as this) so am scratching my head on why people hate on some ebay vendors?!? I cant vouch for others but CXRACING has a very solid kit here...

38mm ext Wastegate again everything looks quality..

The turbo is a replica of a garrett GT35 with a A/R 70 ratio its not a small turbo and again I looked it over and cant see anything different then my old Mitsubishi 14B turbo on my eclipse in the day... How long will it last not sure but all it needs to put out is 8PSI for my goal of total 20 PSI with my Supercharger...

All the fittings, oil lines, and a really well build oil filter adapter to run the feed oil line. All gaskets are metal, every bolt, this is quite a complete kit...all it doesnt have is the oil return line..

So far I have to admit am impressed with this kit... am not sponsored by CXRACING and didnt get paid to say this...I just wanted to be honest and maybe stop the nonsense that all Ebay stuff is garbage...


This kit can be bought directly from www.cxracing.com I grabbed it on special on Blackfriday :)


Stay tuned...

[unevolved]

I checked the flanges for straightness and thickness, welds, I have to admit that I am very surprised by the quality of all this stuff. I know a good weld when I see one and these welds are very very precise with almost perfect penetration and also the welds are grinded down nice and smooth and haven't seen any pin holes either.. (My old thermal research cat back for my old 91 Mitsubishi eclipse back in the day that cost 1500$ was not as quality as this) so am scratching my head on why people hate on some ebay vendors?!? I cant vouch for others but CXRACING has a very solid kit here...

Not trying to hate on your stuff, more just answering your question.

A good weld shouldn't have to be ground down. You can't tell much, if anything, about the weld if it's ground down completely smooth without cutting into it (assuming you can't see the backside, etc).

[Denny]

Not trying to hate on your stuff, more just answering your question.

A good weld shouldn't have to be ground down. You can't tell much, if anything, about the weld if it's ground down completely smooth without cutting into it (assuming you can't see the backside, etc).

Actually the welds are nicely tig welded very minimum ground down its more for looks that they did it as its very minimum. I checked that manifold in and out with a light so on.... Its heavy and the bends are smooth as can be.

Its very obvious that the chinese products are not all created equal in this case 2 thumbs to CXracing for whoever built this kit for them.. quality and best bang for the buck this kit cant be beat. Enough praises :) time to get busy...I got lots of work to do :)

[kamotors]

cant wait to see it be twincharged

[Denny]

cant wait to see it be twincharged

I cant wait to have it all done but winter is long here my car wont see the road until end of april 2013 :( and now I have all the turbo parts so I have to build the car and make the fun build part last until then :)

I found this on the mustang hellion Twincharged cars... not helping my desire to finish it now and drive it!!

Q: How Come the Turbos Alone Will Make More Peak Power at the Same Boost Level Then?

A: As previously stated, the turbochargers are the more efficient power adder (supercharger vs. turbo). In the compound setups, the turbo boost level is limited because the air will be compressed again by the supercharger. Therefor, 20psi of compounded boost will only be about 8 psi from the turbos and 8-9 psi from the supercharger. This means that you will see peak power characteristics that reflect the amount of turbo boost present, with low-end power characteristics of a supercharger. The total boost number is somewhat irrelevant. If we use the turbos only to create 20psi, they are in a more efficient airflow range, but will lack the low-end power of the supercharger. Also, the turbo combinations with lack the mechanical losses, however minimal they may be, which will lead to slightly higher peak power numbers.
Q: What are the Real Benefits of the Compound Boost Setup?

A: The real world benefit of a compound boost setup is average power and driveability. With the compound setup, you can still have the instant boost and low-end grunt of a supercharger, but the addition of the turbochargers will allow for a much more efficient and powerful top-end. This is referred to as "power under the curve." The average amount of power that we are able to produce with the compound systems will provide better driveability while still producing hair-raising amounts of power. Here's a quick example of how to think about it:
Let's say that we have a car that makes 1,000 hp peak, but only makes 500 - 1,000 hp for around 3,000 rpm. Now, we have another car that makes 900 hp peak, but makes 500-900 hp for 5,000 rpm. If we use a linear progression of power to calculate the average power through 5,000 RPM, the second car in question would have an average power output of about 700 hp through 5,000 rpm, whereas the first car mentioned would only have an average output of about 550 - 600 hp through 5,000 rpm. Using this equation, the first car in question has a higher peak power output, however the second car will most likely out-accelerate it due to the fact that it makes more average power over the same RPM range.

[downforce22]

So you decided supercharger will feed the turbo right?

Also what are the specs on your turbo? I will have a very similar setup on a 3.0 stroker setup once I get it running right. Same manifold, same exhaust, same intercooler, I just have to decide on fuel management.

The turbo I have is similar but was probably an ebay special as the company is 'JDM Sport' and its called a 'T70'. I'm trying to compare it to something and I think its a bit smaller than a garrett GT35R. Probably similar to the turbo you got. Specs are:

T70 Turbocharger
Manufacturer - JDM Sport
Ideal for large (3.0L-6.0L) displacement engines
Capable of 25-35 PSI output at peak power performance
Wet float bearing
External wastegate
Compressor Inlet = 4"
Intake (ID / OD) = 2" / 2.5"
Inducer = 56.2 MM
Exducer = 72.9 MM
Trim = 59
A/R = 0.70
Turbine Outlet = 2.5"
Turbo flange = T3 [twin entry divided flange]
Downpipe flange = 2.5" V-band
Inducer = 73.9 MM
Exducer = 58.3 MM
Trim = 62
A/R = 0.84
Oil cool system
Oil feed = T3
Oil return = T3

[Denny]

So you decided supercharger will feed the turbo right?

Also what are the specs on your turbo? I will have a very similar setup on a 3.0 stroker setup once I get it running right. Same manifold, same exhaust, same intercooler, I just have to decide on fuel management.

The turbo I have is similar but was probably an ebay special as the company is 'JDM Sport' and its called a 'T70'. I'm trying to compare it to something and I think its a bit smaller than a garrett GT35R. Probably similar to the turbo you got. Specs are:

T70 Turbocharger
Manufacturer - JDM Sport
Ideal for large (3.0L-6.0L) displacement engines
Capable of 25-35 PSI output at peak power performance
Wet float bearing
External wastegate
Compressor Inlet = 4"
Intake (ID / OD) = 2" / 2.5"
Inducer = 56.2 MM
Exducer = 72.9 MM
Trim = 59
A/R = 0.70
Turbine Outlet = 2.5"
Turbo flange = T3 [twin entry divided flange]
Downpipe flange = 2.5" V-band
Inducer = 73.9 MM
Exducer = 58.3 MM
Trim = 62
A/R = 0.84
Oil cool system
Oil feed = T3
Oil return = T3

Hey I decided to have the turbo feed the blower. But doing it this way the blower will continue to do its job with low end grunt and with the extra 1L of displacement spool that turbo a lot faster. I was told the difference between the GT35 and GT35R is the later is ball-bearing same size. AR70 same as this turbo.

[2mAn]

was browsing your blog and was looking at the supercharger build. where did you get the serp pulley that goes on the crank? im going to build a supercharger kit and that seems to be the buggest hurdle, parts wise

[Denny]

was browsing your blog and was looking at the supercharger build. where did you get the serp pulley that goes on the crank? im going to build a supercharger kit and that seems to be the buggest hurdle, parts wise

Parts wise yes the crank pulley is a big item. My contact was Mark Campbell at http://www.hotrodlane.cc/ - 479-394-5711

Mark already has all the specs for the M20 engine so he could just cut you another one like mine 7". It will cost you around 250-300$ just so you know.

Good luck with your build!