Got mine in. Thanks a ton!



FOR YT: USE ONLY THE CODE AFTER THE "="

Ah thanks for fixing it.

So how are these holding up so far?

I'm waiting to hear back from the people to see their results. I've sent them out to 3 so far, all different One 1.6 and 2 99 headded cars. One is a NA and one NB.

So if I sent you a lower intake do you think you could build an upper for something say a 2JZ???

Ill build a mani for anything, I will have to start from scratch on a design though, because I have not made one for a 2jz, also what car is the 2jz in? Please call or email me, both can be found on my web site in my sig

Sent you an email

Toyota Supra and Lexus SC300

SC300 is correct using a factory GE head instead of swapping to a GTE

I am pretty sure there is a loss of low end power, but top end must be pretty good.

I browsed the whole thread, very nice work and cool website, Kudos for you!

Only thing about your website, for some reason it is super slow on the refresh rate, and there are a few dead links.

I admittedly didn't read the entire thread...

Any chance of having full emissions compliance on a '99? EGR, IAC, and everything else? If so, I'm interested.

The web site is a work in progress, I get stuff up when I can. As far as adding EGR and IAC, it can be done, and I still don't know if it would be emissions compliant. Definatly not here in CA.

This is really sweet! I like to see these hand built parts being made keep up the good work!

Emailed

Replied

Anybody bought a manifold from his lineup yet and had their car dyno'd?? I must see some dyno results, money is waiting to make an order.

At this point everyone that has bought one is still in the middle of there build.

Ill post up the dyno results as soon as I get them. Or if I ever get around to dynoing my car Ill post that up as well, I just dont have a before graph, but I believe that the torque cure will speak for its self on any setup.

I promise I will dyno my setup when it is done, and then again when I have my built engine and I actually need a manifold like this.

Ah ok thanks..

I have had my car running for a few weeks now. To me it feels great, to my friends the car feels crazy. Mid range feels the same as it always has, past 5000 the car pulls like a train. Even though I made a few changes to the motor, the basic setup is the exact same. At the same boost pre-build the car did not pull this well.

Caution Huge pic.
 

What throttle body is that?

LS1
The plate is 75mm, the whole thing is 4 inches.

THREADSURRECT!

Have you put any more thought into building and selling these? I would be very interested.

I don't know where you have been but Ive been selling them off of my web site since this thread started.

Anyone else have 1 of these on a running car yet?

Interested in purchasing one of these.

I will be building one for jtothawhat's 600whp build, just waiting for the funds to start.

Hey jim, haven't seen u on the msm forum forever. Car looks good, interesting oil control routing but at least the stock shit is gone

Just thought I would say that FRT_FUN has one of my manis for sale right now, he is parting his whole set up out, and has a good deal on it right now if any one is looking for one with all the bells and whistles. so bump for a good buyer

Hey man aluminum aint that hard just heat it up a bit before you go at it and make sure you clean it like crazy with proper aluminum cleaner and then rub it down with a scotch bright cloth.

Is the throttle body bigger than the diameter of the intake plenum itself, or are these pics just deceiving?

So the one for 300$ is less than a Honda hybrid setup.

How would it compare?

the plate in the TB is about 75mm, the coupler on it however is 4inches/98mm.

No the throttle body is never bigger than the plenum, it just looks that way. The tapering mani starts at the same size as the throttle body opening and then gets larger. The round style is larger altogether but also uses a hemisphere to help the transition so there are no sharp corners.

I can optimize the plenum size and runner length as you please, with the Honda one you get what you get.

What can you do for midrange gains?

Any kind of ideas what actual improvement that would work out to?

From what people have dynoed the honda types, it seems that it helped the mid rang. you could expect more gains from a mani with velocity stacks, in fact I have not even sold 1 with out the velocity stacks. I honestly dont think there would be much difference in gains between my $300 model and the honda mani exept that I can change where it is most efficient. Thats why I offer to do the honda ones as well, its no problem for me to weld them up, and it seems like the good choice for marginal gains at a fairly low cost. Of course if you are going for big power, or want something that is specific to your set up you need something else, thats where my higher end stuff comes into play.

Sent a pm to you gotpsi

talent
 

Your upper end IMs look very good. How did you come by the taper. Is there some calc you did for volume per cylinder?

I put a lot of time into designing my plenum shape, with some help from solid works, and those that can use it.

Gotpsi? Any chance you remember my runner length and plenum size? Been getting some interest about the manifold but don't have many answers for them. Anything you can tell me about it would be appreciated :D

Ill have to look at my notes and get back to you but I believe the plenum was in the 160in3 range, and the runners in the 12" I think, it was some time ago now. I'm thinking I made them 6" on that mani plus the centerline of the port in the head length which is what I'm drawing a blank on at the moment.

ME TOO!!!! the stainless makes so many pretty colors...you should try titanium

Sent you a PM!!! :)

So for 6" runners, what torque peak were you building that for, what RPM?

For the plenum volume, do you choose that by engine size or horsepower goal?

Doublepost.

Plenum volume by use, just to generalize, the larger the plenum, the less responsive the engine will be, as a rule of thumb for forced induction the plenum will be 1.5-2x the size of the engine displacment.But will be larger for crazy HP applications. Runner length is a bit more complicated, especially for N/A applications. Shorter runners will allow the engine to still be efficient at high rpm when off boost, and less restrictive anywhere in the rpm range when in boost. I have all the specs of that mani written down I just have to find them for specifics.

Ok so I looked into my notes, with the runner length on that mani its set up to make torque up to 8k, peak torque depends on when your turbo spools and takes over the wave affect in the runners and plenum, so you will see gains as soon as you are 100kpa+ and will build power to redline from there, the only limiting factors are the cams you are running. Also with the way I set up the plenum and the throttle body, the throttle response should be just as good as a stock mani, and should help spool with good tunning.

The reason I ask about 6" runners is that I /think/ that's the exact length Brain had and then ditched because the powerband was moved up way too high.

That manifold was built for a different head, different length runner. I can make them as long as you want, that is just one of the ones I have built. My mani has even shorter runners but it is track only, and is only ever below 4k when I'm in the pits.

Right, but even with a turbo, you adjust the runner length inversely to your target torque peak, correct?

Or are you saying that shorter runners just increase response at the cost of N/A drivability, the shorter the better when turboed?

For instance... if you had an N/A engine with a desired torque peak of about 6200 rpm, and a turbo engine with the same desired torque peak, would you use the same length runners?

Or are you saying that shorter runners just increase response at the cost of N/A drivability, the shorter the better when turboed? shorter is usually better with a turbo.

For instance... if you had an N/A engine with a desired torque peak of about 6200 rpm, and a turbo engine with the same desired torque peak, would you use the same length runners? It would depend on your turbo, if you want response for the street short runners and a small turbo would be great, if you want big power you want short runners and a big turbo, if you want a big turbo and better response than overall power than long runners are better. In your case since your turbo is not huge and its a street car you would be best suited somewhere in the middle.[/QUOTE]

I really hate to sound like a tard, but here it goes... Gotpsi. You are saying that you must create over 100kpa (14+psi) to overcome the wave effect that is being generated by the cycling intake.
Two questions. If you never go above 14 pounds of boost will you ever take over the wave effect? If that is true all the people running 5, 6, or even 10 psi will never overcome the surgeing of the on/off of the intake valve...

Question two. Man your engine is the bomb, torque up to 8k. How high does it rev?

No, he's saying the manifold he built for FRT_Fun was setup to have torque to 8k...

Also throttle body size will also affect response which is why you need to go bigger with a large plenum, because your off boost throttle changes may lag if the throttle body is to small, making for an annoying stumble or laggy turbo, even if you are at high rpm before you open it up.

100 kpa is 0 psi, anything over that will overcome the waves.

Just thought I would though some pics up of some of the newer manifolds that have been done w/ tapering runners.

[IMG]https://www.miataturbo.net/attachmen...ine=1330197063[/IMG]

[IMG]https://www.miataturbo.net/attachmen...ine=1330197063[/IMG]

[IMG]https://www.miataturbo.net/attachmen...ine=1330197063[/IMG]

[IMG]http://i391.photobucket.com/albums/o...x/IMAG0285.jpg[/IMG]




Also doing them with flush runners for those that want it.
[IMG]https://www.miataturbo.net/attachmen...ine=1330197063[/IMG]

Can't wait to see how that one does. When does it ship?