That TQ loss in the mid range is what you'll see in just the upper swap, That's what I saw when testing the M370 Vs. Z1, 5 WHP would be the lower porting. :)

No can see. :(

I know I'm having issues with posting photos from photo bucket. That's why I haven't posted the photos yet. So working on it.

http://http://i1078.photobucket.com/...saxxhjoyl.jpeg

http://i1078.photobucket.com/albums/...saxxhjoyl.jpeg

http://i1078.photobucket.com/albums/...sjowjioss.jpeg

http://i1078.photobucket.com/albums/...sd79zj1yb.jpeg

http://i1078.photobucket.com/albums/...srpgwwwms.jpeg
http://i1078.photobucket.com/albums/...s05oak2vh.jpeg
http://i1078.photobucket.com/albums/...sc8v0krrj.jpeg
http://i1078.photobucket.com/albums/...s7h9a6fl0.jpeg

http://i1078.photobucket.com/albums/...s8dqtkbln.jpeg
http://i1078.photobucket.com/albums/...sepljsy2n.jpeg
http://i1078.photobucket.com/albums/...sauzokez5.jpeg

So that's all the pictures of the ported lower intake manifold from Z1. I'm installing it all Sunday so I can take more pictures before then if any of you would like. Now I'll post pics of the ported plenum.

http://i1078.photobucket.com/albums/...swzzgohpc.jpeg
http://i1078.photobucket.com/albums/...s5itnin3z.jpeg
http://i1078.photobucket.com/albums/...skhfa5lcc.jpeg
http://i1078.photobucket.com/albums/...sdb6wzbqh.jpeg
http://i1078.photobucket.com/albums/...s216hdqgk.jpeg
http://i1078.photobucket.com/albums/...sd4y3hfgx.jpeg
http://i1078.photobucket.com/albums/...sdizuayis.jpeg
http://i1078.photobucket.com/albums/...s27slxzzt.jpeg
http://i1078.photobucket.com/albums/...suyk3usvt.jpeg
http://i1078.photobucket.com/albums/...serhya56w.jpeg
http://i1078.photobucket.com/albums/...swdsocz5a.jpeg
http://i1078.photobucket.com/albums/...serhya56w.jpeg
http://i1078.photobucket.com/albums/...sujsmgifx.jpeg

Again I can take other pictures if someone would like. As far as the finished product the build quality looks great on both pieces and while the ported plastic looks rough the surfaces are very smooth to the touch. There's no excess epoxy between the two half a of the plenum and to the untrained eye it would look as though the two pieces were never split.

http://i1078.photobucket.com/albums/...sxrb0ukxm.jpeg
http://i1078.photobucket.com/albums/...sang5yqy2.jpeghttp://i1078.photobucket.com/albums/...sctcqrdb3.jpeg
http://i1078.photobucket.com/albums/...s4d9crmrn.jpeg

This last pictures are for anyone having trouble visualizing the plenum and lower manifold actually connected as they will be installed in the car.

Just ordered my upper and lower intake plenum and ported runners. They're waiting on cores to build them for me and they said mid-next week I should get them. Hopefully I can get these last cat bolts off, test pipes on and my crank and alternator pulleys swapped out before then haha. I'm definitely looking forward to hearing your experience putting them on! And hurry and ship your cores back!!! Haha

Well if nothing else I'm sending my cores back Monday. I'll keep everyone posted on the dyno results.

So I wasn't able to install the lower intake manifold Sunday. I was unsure about how to remove the fuel rail and since I was by myself without another car I decided to wait till this next Sunday to finish the install. I did however go ahead and install the ported plenum. I'm going to try to do a dyno run tonight after work, like 10-11pm central time, and see what the difference is with just this mod then install the lower manifold. I have to say based on feel from driving, I know that's incredible inaccurate, the difference is similar to when I installed the stillen gen 3 intake. Mid to high rpm the car seems to be pulling harder to redline. Also I noticed more traction issues going from 1st gear to second and from second to third.

Any dyno numbers?

I'm heading down to Z1 on the 20th for a tune. I didn't do a base run, which makes my numbers much less useful, I do apologize for that but hopefully some extrapolation can give an idea of the gains to be had.

Yes but for now I'm leaving it at inconclusive. Somehow I've lost a lot of power after these mods and a tune. I'm working with my tuner and Z1 to try to track down the problem. I'm swapping a stock manifold and plenum on Sunday and doing a before and after dyno to see what that changes and how. While I'm doing this I'm going to go through all my work and make sure there are no vacuum leeks or anything installed incorrectly on my end before I give a full review. I don't want to make any unwarranted claims against anyone or anything till I have some more info. Your welcome to pm me if you want me to go more in depth but for now this is all I will say publicly on the subject.

that's like that syno guy losing power on e85... weird things happen

Yeah I reinstalled just the stock upper plenum and left the port lower manifold on. I did a before Dyno where I reset the ecu then did a run with the Z1 parts. Then we changes out the upper plenum and reset the ecu while the car was on the Dyno and did another run. I gained 5 horsepower going back to stock. So this weekend I'll do the same with the lower intake manifold. I've been speaking with Z1 who has been very helpful. Once I change the part out I'll let them know what I find. We are trying to determine if there's an issue with the plenum or something else on the car. I will keep everyone updated. I'm not in anyway speaking badly of Z1. They have been very helpful to me. Things happen and I'm not total sure it's an issue with there part yet. I just wanted to keep the community updated.

I might just hang on to my stock parts for a little bit until you've got a better idea of what's going on then instead of sending them back for the core charge. I'm a little worried since I don't have any before numbers to compare to...

Yeah we will see what happens. Like I said I'll keep you guys updated for now.

Are you tuning at all after the mods?

I installed the plenum and lost 7whp. I assumed this was because I need a tune so I went ahead and installed the manifold as well. I went to Rob at topspeed Motorsports and had him tune the car. I was down by about 17whp when I got to him. After he tuned the car with ecutek I gained 15whp with the tune. So I was still under my original number so we swapped back the stock plenum. I reset the ecu and did two Dyno runs at operating temperature. Then we changed the plenum, we didn't even take the car off the Dyno. Brought the car back up to operating temperature and did two more runs. I gained 5whp going back to stock but haven't tuned it since. I'm going to swap back the stock lower manifold next and see what happens.

I never ordered the lower because my tuner said it was a waste. I ended up making 334/267 with gen 3, FI CBE, FI test pipes, Upper plenum. Highest 370z on their dyno is 341.

341? 441 with a supercharger? lol

also your signature says 334/167 lol

Any updates?

No I haven't had a chance to work on the car. It's been mine and my little brothers birthday so it was a bit of a celebration this weekend. The Z1 lower is still on with a stock plenum. I have a friend who is about to sell his older Z1 plenum, so I'm going to barrow his and swap it on and see what happens. If I make more power with it then we have an isolated incident with my current plenum. If I lose power again it will call into question if any of the plenums make power. I'm also hoping to change out the lower manifold but after holding a stock one in my hand and the one from Z1 in my hands I doubt there is much of a difference.

Thats all you have done? who tuned your car?

Here's my dyno sheet from Z1.

314 whp and 260 wtq.

They seemed pretty happy about the numbers partially since the guy before me had an M6 G37 with similar mods and put down 306. The torque numbers make me a little sad, but again, I'm coming from LS1 land where the numbers are usually pretty similar. Mods are in the sig. I don't have any before numbers to compare to, I'm sorry. Time and circumstances did not permit me to get a before run.

we got similar mods but they were able to squeeze out more hp for me... i went to z1 as well and jon was more than happy with the numbers

I fixed the number...I had my tune by Daniel Church in tampa.


http://imgur.com/clhIJyJ

Some guy from tampa dyno'd at z1 motorsports and made 341 whp on uprev with cbe,intake, ported lower, and z1 manifold. Thats with a,stock exhaust manifold.

Nice! Im trying to make that, but not sure what to do next.

Same here. I have everything except for the upper plenum and lower manifold but don't want to encounter the same issues Mysilverz did...

Wonder if he's made any progress in diagnosing why he was losing power (hint, hint) :p

I got your hint. I honestly think it's the part. So I still have the ported Z1 lower manifold on. I have a friend in Birmingham who was selling his Z1 ported upper plenum. So for the hell of it we swapped from the stock one I'm running now to his Z1 plenum. It gained 2whp. The procedure was the same. We reset the ecu and did two runs with the Z1 ported lower and the stock upper plenum. The car made 303whp. Then we swapped to the ported Z1 upper, reset the ecu, let the car warm up to normal operational temperature and did two more runs. Final number was 305whp. So read into that what you want. I'm speaking with someone at Z1 now. As soon as I swap back to the OEM lower manifold I'm going to do another run and ask for a refund in some way from Z1. I can't seem to get back to my previous numbers since I put their parts on.

Honestly this has all been so frustrating that it's stopped me from doing any new mods to my car. I don't really want to invest more money in the car till I get back to atleast 310whp. I'm going to start saving for a turbo kit and when I have the money to buy the kit I'm going to also look at the Q60 and hopefully the new Z. I'm just not happy with everything I've gone through with this. At $60 a pop I've done three Dyno pulls not including the tune. I've lost a lot of money on these parts. Also I'm very frustrated to see a car at z1 with my setup making 30-40 more than my car when I was already at 317whp before I put their parts on. I'm making the same power right now as I was with an intake and CBE. Car runs great too. I've just lost a good bit of power. That's my rant for now.

have u tried removing the z1 parts to see if your car still gets 317. Maybe its your car and not the parts. just trying to help ya.

I removed the upper plenum and gained 5whp back. The ported lower is still on. I'm just trying to find the time to change it. It's a bit time consuming and I don't have a inch/lbs torque wrench so I'll have to barrow one from a friend.

Its got to be your tuner. Are they doing a custom pro tune? My first tune with Fast intentions long tubes i made 316whp i only gained 5whp from my Untuned baseline and i barely picked up across the board. 3 weeks i scheduled another tune with a different person and come to find out I was running super lean from 2-3 and kinda rich across the board. He ended up fixing that problem and i picked up huge from 2-3 and gained 18whp at the end. For some of us we have great tuner close to us for some you have to travel. That guy in tampa made crazy numbers with ported lower and z1's upper. Hope you find a solution to your problem.

Thats some great numbers. Our dyno sheets don't differ to much. I make 300whp little sooner that you and make 4 more ft/tq. Great stuff

This^^. I've gained 12 hp between tuners before with no changes to my car.

I don't believe it's an issue with the tuner. I went to rob at topspeed Motorsports. I gained 15whp with his tune. He's a very reputable tuner that worked for Z1 for a long time before he left to start his own tuning company. He tuned my friends 370 that uses the same setup I use and gained 25whp ending at 325. My a/F ratios are perfect. Even my friend who owns a Dyno commented on how spot on it is. I'm just not sure if I should try to take it some where else and try to tune the car again.