VE+T Twin scroll GT3076r done [Archive] - SR20 Forum

: VE+T Twin scroll GT3076r done


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Coheed
07-12-2009, 12:48 AM
I changed the manifold recently on my sel. Here are some pics. I upgraded from a log manifold, put in a new CHRA, and clutch/light flywheel setup.

http://i295.photobucket.com/albums/mm158/CoheedJV/Manifold/DSCN1953.jpg

http://i295.photobucket.com/albums/mm158/CoheedJV/Manifold/DSCN1954.jpg

http://i295.photobucket.com/albums/mm158/CoheedJV/Manifold/DSCN1956.jpg

http://i295.photobucket.com/albums/mm158/CoheedJV/Manifold/DSCN1957.jpg

http://i295.photobucket.com/albums/mm158/CoheedJV/Manifold/DSCN1958.jpg

http://i295.photobucket.com/albums/mm158/CoheedJV/Manifold/DSCN1959.jpg

http://i295.photobucket.com/albums/mm158/CoheedJV/Manifold/DSCN1960.jpg

http://i295.photobucket.com/albums/mm158/CoheedJV/Manifold/DSCN1961.jpg

http://i295.photobucket.com/albums/mm158/CoheedJV/Manifold/DSCN1962.jpg

http://i295.photobucket.com/albums/mm158/CoheedJV/Manifold/DSCN1963.jpg

http://i295.photobucket.com/albums/mm158/CoheedJV/Manifold/DSCN1967.jpg

The final mockups:
http://i295.photobucket.com/albums/mm158/CoheedJV/Manifold/DSCN1966.jpg

http://i295.photobucket.com/albums/mm158/CoheedJV/Manifold/DSCN1965.jpg

Short video.

http://i295.photobucket.com/albums/mm158/CoheedJV/Manifold/th_DSCN1972.jpg (http://s295.photobucket.com/albums/mm158/CoheedJV/Manifold/?action=view&current=DSCN1972.flv)

Any thoughts or questions?

Coheed
07-12-2009, 12:52 AM
The turbo response from this setup is just about nuts. Feels like the turbo is a BB T28. Boost hits 10psi at 3700rpm. I know if there were some boost overshoot the car would hit a lot harder too. You can hear the wastegates open at about 7psi and level out at 10psi. With a 12psi overshoot it would cure that a bit.

I am ready to start playing with some cams now. I have some standard VE cams, but I think I wanna jump straight to the SR16VE cams and see how they do with a divided manifold.

kleensleeper
07-12-2009, 01:21 AM
Setup's looking good.Are those twin 38's?

budgetNX
07-12-2009, 02:50 AM
gangster shit right there!

kim
07-12-2009, 06:01 AM
very nice bro...

Coheed
07-12-2009, 11:47 AM
Setup's looking good.Are those twin 38's?
Yea these are the new V38s. They are amazing and made the mani design so much easier! They are dumping straight out now instead of recirculating back to the exhaust like they did before.

gangster sh*t right there!
I am really really excited about this setup. When the turbo is in the sweet spot at about 16psi it should make very good power and be very responsive. :biggthump

very nice bro...
Thanks. Took a lot of days off to get it finished, and she still needs some remodeling. But it is a very nice (but loud) drive. Feels amazing to drive. It is a beast.

The only issue now is the timing map. Regardless of boost pressure, the timing gets knocked down to 15* at 4K rpm, then creeps up to 19* by 7500rpm. This car could feel so so much faster with a lot more timing, but I can't advance it too far without causing idle issues lol. So I am going to cure this with some boost! I am hoping for maybe 340whp when tuned on 10psi, but I am limited to changing fuel pressure and base timing with the JWT computer.

After dyno results I want to test some SR16VE cams!

Speedy27
07-12-2009, 02:27 PM
Those the Turbo bounce the Radiator on gear changes???

Is it a 2 core radiator you are using???

Coheed
07-12-2009, 04:28 PM
The turbo/mani clears the radiator by about .5". It doesn't hit on gear changes, and I am not even running a front motor mount right now!

The motor has more movement, but it is so much more driveable without the front motor mount. I think I am going to put my old window-welded mount in because it was a lot softer than the Prothane mount.

I am using a 2 core 1" radiator. IT is full aluminum and I haven't had any issues with overheating, even in 100* heat so far with no rad fans! I hooked the fans up yesterday though just to be safe.

The radiator got a few bent fins from test fitting this manifold.

evilempire18
07-12-2009, 04:36 PM
you must be 1 happy man, it looks really good bro... Jarom was done pretty quick too.

Coheed
07-12-2009, 06:24 PM
Ya he finished up in under a week. I am very very happy with this setup!

kim
07-13-2009, 08:16 AM
very good man,after this i wan to dyno my engine also and what happen.

Luis
07-13-2009, 12:31 PM
Let us know when you try a dyno with vvl activation on the exhaust cam :) Do you have any pictures with the downpipe installed?

jp
07-13-2009, 02:05 PM
coheed give luis a hand (if you can) with the exhaust manifold.... he has a very similar setup 3076 log vet and sr16 cams etc... maybe you can help him out.
get the alky budy it will spool much faster and you will have the ability of bump the timing...
cheers and congrats !!

Coheed
07-13-2009, 10:46 PM
I played with the exhaust cam and you can def tell a difference when it switches. I didn't drive it like that at WOT. There was barely any difference in spool or power that I could notice in the 5 min of driving. But with a bigger intake cam who knows? I just put in my stock cams to see how they perform. When I get it one the dyno I am going to put in the vET ex cam and see what she does. The VET ex should spool the turbo really quick and the extra duration should help the top end. It just needs the right intake cam to work with it I think. Since ***** knows the real specs on the large lobe of the VET ex, we can only speculate...

Coheed
07-14-2009, 01:10 AM
So I took her out tonight and boy can I tell you the VVL hits nicely! I can actually feel the power increase. The only downside is the VET cams had better response and spooled the turbo much quicker. There is a slight latency now, but when the VVL kicks it pushes you into the seat and sounds so sexy!

Maf voltage is stuck at around 4.18V at near redline. On 24psi I was at 4.52V peak (log mani and 440whp). Right now I have the VVL ex hitting at 3500rpm to help spool, and the intake at 5000. You don't really feel the intake much, but the exhaust hits very good.

The VE cams seem to put out just a bit more power than the VET cams, and throw you back a lot harder when they switch! I just don't know for sure which one makes the most power, but the standard cams seem to pull harder on the top end for sure. Prob 20whp difference on this low of boost. I am now spinning tires through 1'st and really fighting traction in 2nd. I would like to see what kind of power the VE intake cam and the VET exhaust cam make. The VET cams are the king of response! The boost was instantaneous, and just downright nasty! But the VE cams make more power. Sigh. Perhaps I can find a happy medium between the two, and switch the VET exhaust onto its high lobe!

The nice thing about the VE cams is that they are soo quiet compared to the VET cams. The VET exhaust sounds like the VVL is on all the time. It is loud and obnoxious. the VE cams sound smooth and silky, and idle better.

Finally though, it is good to feel the kick of the VVL once again. I am hooked. Now I want those SR16 cams!

Coheed
07-17-2009, 03:32 AM
some rolling videos through 1-2nd.

http://i295.photobucket.com/albums/mm158/CoheedJV/Ridealong/th_IMGP0327.jpg (http://s295.photobucket.com/albums/mm158/CoheedJV/Ridealong/?action=view&current=IMGP0327.flv)

http://i295.photobucket.com/albums/mm158/CoheedJV/Ridealong/th_IMGP0331.jpg (http://s295.photobucket.com/albums/mm158/CoheedJV/Ridealong/?action=view&current=IMGP0331.flv)

10psi.

evilempire18
07-17-2009, 09:46 AM
damnnnn kid in a candy shop... lol... love it!

Coheed
07-17-2009, 12:01 PM
Ya you hear me at the beginning of the second video "hit the f*n button already" lol. He doesn't know how to operate his own camera lol. He kept hittin the button and didn't know when it was recording lol.

with the z32 maf I am hitting 4.16V, so power is somewhere around??? The G20 was hitting 3.99V or so on 14psi with a bb T25, so the car doesn't make that much more power. Maybe 15-20whp more on 4psi less boost. When the boost gets turned up I am sure the car will make a lot more power over the log.

The first video you can hear the exhaust cam switch and then I stab it. Sounds great.

Rockwood
07-17-2009, 12:26 PM
Looks good. Were you having boost creep issues with just one wastegate, or just wanted to make extra sure?

BTW, I'd move that coolant line to pass over the compressor side. I don't think the line will last long with it passing that close to the turbine, right over the top of it, that close to the hood.

The videos bring me back though. Just wait until you crank the boost and it does that in 3rd and 4th gear... :D

Coheed
07-17-2009, 04:32 PM
Looks good. Were you having boost creep issues with just one wastegate, or just wanted to make extra sure?

BTW, I'd move that coolant line to pass over the compressor side. I don't think the line will last long with it passing that close to the turbine, right over the top of it, that close to the hood.

The videos bring me back though. Just wait until you crank the boost and it does that in 3rd and 4th gear... :D

This is a twin scroll manifold, so to keep pulses separated you should use 2 wastegates.

The coolant line doesn't pass over the turbine very close. The pic makes it look like it is 1" away, but it is really over 3" away from the turbine. The silicone is rated to handle 400*F so I don't think I have to worry about the line getting damaged. The turbine will get a wrap soon to cut heat down.

I did raise the boost the other day and it felt really really good. BUT i did so by creating a boost leak of metered air so the car ran really rich. Pulled really good though for it being over 100* outside.

I cant wait to dyno.