I can't wait for Charles to come out with his version. Should be good.

 

Is it the intake manifold posted in this thread?

https://my350z.com/forum/shop-builds...-1017rwhp.html

If so, it looks like it is going to scream at high RPM!

With the dimensions of those intake runners (e.g. short and wide), however, won't the intake air velocity suffer in the low and mid-RPM ranges (i.e. resulting in less low-mid RPM torque), or is there something I'm missing?

If that is the wrong picture, disregard my question.

A dyno comparison between your new intake manifold/plenum and the Cosworth would be great to see. Please post one when you can.

 

Cosworth = false hope...

 

Definitely starting to feel that way...

Cosworth is really stretching the cliche "patience if a virtue."

 

Tell us more...tell us more!!!

 

Refer to post 22..

 

Wait for the dyno results.

I really, really hope I'm wrong about this, but based on the looks of the intake, I don't think there is going to be improved performance accross the entire rpm range. My guess, and this is just a SWAG, is that the new intake will trade off torque/hp below about 5500 rpm, and then open up above 5500 rpm. I think it will be somewhat analagous to the difference between the VQ35DE intake plenum and the VQ35HR intake plenum.

Again, I hope I'm wrong, but hopefully they will post dyno results comparing it to the Cosworth.

 

^ we have already discussed doing this comparison (just as we tested the cosworth when it first shipped), and plan on it

 

If Cosworth is making crap, don't buy it! Get your money back and part ways

 

SFR does custom intake manifold, and they look pretty sweet

 

Quote:

Originally Posted by UMW350Z

If Cosworth is making crap, don't buy it! Get your money back and part ways

True..

 

True, but if you bought that you would have to have your piping custom made(wouldnt work on any sc application)... If you are FI for example.. That manifold would only work on cars with the sfr kit only..



That would cost way more that what its worth..

SFR says they make a single, i have yet to see it..

Pricing...

Twin Throttlebody
350Z/G35 Twin plenum Twin throttlebody Intake Manifold- $1599
Coolant/Power steering/oil catch resivoir(need for conv.)-$549
Wiring harness(needfor conv.)-$299
Polishing-$350
Powdercoating-$300
Vanity Cover-$199
Genuine Nissan throttlebody-$289
Twin inlet/outlet intercooler-$1099
Intercooler piping for Twin plenum intake manifold-$349
NX Direct Port Nitrous Upgrade(125 to 375WHP) -$1999


Single Throttlebody
350Z/G35 Single throttlebody Intake Manifold- $1699
Twin Cold Air Intake System for N/A Apliccations-$399
NX Direct Port Nitrous Upgrade(125 to 375WHP) -$1999

 

I too hope you are wrong This Cosworth was not cheap

 

Kool...cant wait to see it...

 

We need to do more testing with a boosted car of lower HP, such as mine. I am curious where the crossover point between sacrafice and gains is when boost is a factor. Based on what I saw before and my best speculation, I would expect a car like mine to sacrafice around 6-10ft lb of torque under full throttle until some pressure is built (quick on a greddy car, less quick on larger turbo cars).

Intake manifolds without variable geometry (meaning nothing in the aftermarket) are always compromise in performance. If you are concerned the most with peak power from idle to 5500 RPM i definatly recommend you keep the stock intake or something with longer runners such as the Cosworth. While ours may start to make power as early as 3500 depending on your boost curve, there is not really much telling at these points, just speculation.

Our intake manifold will not sing at those RPMs. One of the ways you achieve big power out of smaller displacement engines is with RPM. Yes you will sacrafice a negligible bit of low end and mid range with an intake like ours.... the nice part about it tho is that you wont feel the difference when driving around town and when you floor it to make peak power you are not hanging around such low RPMs anyway. Our manifold is tuned for the higher RPMs and even tho it was built 2 years ago it never even was tested real world until now because it was way ahead of its time.

It still is in my opinion. I think it will be at least a year or two before the entire 350z/G35 community as a whole is capable of the type of power SP and Injected are making in some cars, and I really dont know if this manifold has a place on the average 500-650hp cars just yet, I just dont know what type of RPM and/or load to expect it to start producing gains at... or who knows maybe its just a FAIL and robs power at all RPM.

I did a few dyno runs 2+ years ago with this intake on a NA car just to see how much you sacrafice in low and midrange. I will see if I can dig up the results. On a NA car, this manifold is not for you to even consider unless you are revving to 8000-9000rpm... because below 7000 on a NA car it isnt going to do anything (it has negative gains) and if you just redline when it starts to kick in (7000rpm was where the before/after lines met up), you have a mismatched combo of parts.

Anyway, 3 years ago when we started the project (BTW thanks for the props, but while it happened because of me, its actually the result of 3 minds at work, John in Milwaukee, Brandon at CJM, and myself.) it was never intended for the current type of boosted Z's running mild power and boost... it was meant for the future cars beginning with some of the builds we are seeing the last year. In many communitys I have watched grow, they are always slowly working their way up in power #'s and then a bit late in the game they start playing with application built intake manifolds and start to really unlock more potential.

Back to back testing would be great, but thats in the hands of the gentleman that have the one and only functional prototype.

But I do agree with you, the comparisons I think we need to see would be:

CJM VS Stock w/ Aftermarket Plenum on 500-600hp car.
CJM VS Stock or Cosworth on 1000HP car

and thats about it, NA isnt really a part of the equation with this manifold.

I will ask SP about testing versus another intake, but I dont know if they have the time.

 

Thank you very, very much for a candid discussion. That is very refreshing. Again, I really do hope the manifold performs well!!!!

 

^^^Nice info..now I understand^^^

 

I found the thread but the pics are no longer there

https://my350z.com/forum/forced-indu...revisited.html

Can you post up some pics?

 

Im still waiting for mine from the 1st pre-order list with Forged, I hope this thing will be available and up to par before winter is over.....

 

should call this thread cosworth lack of updates.should cancel all orders and return any non installed intakes.....maybe return the installed ones too!i think they'l bealmost unsellable used due to the fact that no one knows which "version" they will be getting.i called this thing a flop from the beginning against the tide and am glad others are seeing the light.over priced,wait forever and take delivery of a turd that might perform for 1% of z owners running high boost.