alright, that sounds like it'll work.
thanks dude :icon_tup:

Updates?
I'm doing the same thing, only different shape ports, different timing and a sexier RBTB ;D

Same turbo too? Post pics of your setup!

any updated? pics? cant wait to see this finished. looks awsome so far.

afraid i dont have any updates right now, but i can let you guys know what the deal is.

I just started working after being unemployed for a bit, so money is offically now coming in.

The roller barrel throttle bodies are almost complete in there design, so it wont be too many weeks (mabey a month) before they are done.

As far as the rest of the intake manifold, and the turbo manifold, i can start any time, just dont have access to a welder right now. (if you live in south FL and would like to lend me a TIG/MIG welder, i would be quite appreciative.)

the only thing i have done since my last updates are just cleaning up the intake plenum on the inside/outside for looks/smooth flow.

seeing as this is quite the budget build for me, any pointers on anyone on how i could save money here or there would be quite helpful.

at the moment, i am considering dual 60mm tial wastegates, a 50mm bov; If anybody thinks i can get away with running smaller gates and still achieve boost as low as 10psi while street crusing, please let me know.

updates soon

-Zander

Money saving tip #1: Dual 60mm TiAls is overkill. The 44mm WGs will definitely do the job.

On my GT4202 (T6) setup on my 20B, all that I have is a single 44. Running on just the 0.6 Bar spring, I was getting no boost spikes. For more complete information's sake, my motor is unported and we were only running it up to 7500 RPM.

trust me, i want to go with the 44s, they are a lot cheaper, but i've been told on a turbo p-port im gunna need huge wastegates to regulate low boost..
if anybody knows specifically about p-port turbos, could you please chime in?

I don't fully understand the reasoning on trying to run 10psi on the street with a p-port and 75mm turbo....

But, 2x 44mm WG's will flow over 500 CFM of waste air, I would definitely at least try with them and only upgrade if you have issues. Or, for that matter, DONT RUN ONLY 10PSI ON THE STREET?!?!? you will only enjoy about 1/8 of your power range, and you will be way out of that turbo's efficiency range.

well thats fair comment really..

I want that as a low boost setting. I plan on having 25psi-ish on pump with water injection as a high boost setting. When running e85, i plan on at least 35psi.

even at 10psi it'll be upwards of 450rwhp.

I think it would be worth your while to see if the two 44's will do you. With a proper manifold design and boost controller (maybe consider running one of the C02 powered boost controllers) I'm sure the 44's will give you all the boost control you need.

ok, then thats probably what i'll do. hey, if it fails, then i'll just remake the wastegate runners on the manifold so they hold 60mm gates.

On my old GT42R/Half-Bridge setup, I used dual Tial 44mm wastegates and could hold boost at 14psi (which was the spring rate). I don't think you will need 60mm wastegates.

I hope you are right.
It will just be very important to get the angles of the runners exact if i want to get away with the 44mm gates.

DUde. DO it once and never look back. What *IF* you end up having to get the 60mm's for some reason. The money you WERe trying to save, could make you spend even more.

that's what im worried about.. :/ I guess your right.

You do know you can go too big too right? I know where you are but the simple fact is that every setup is different and you won't know until you try it. I'm sure thats not what you wanted to hear :icon_tup:

I didnt know that. SO now the question is. What factors decide the correct wastegate size?

sweet bro

I'm sure two 44s would work just fine with such a large turbine/housing; personally I think it has more to do with wastegate runner design than anything.

60mm wastegate, twin runners to the 60mm.. And you will be fine... enjoy...

2 44's flow more than 1 60mm wastegate.

Have you considered cutting channels into the pan to guide oil towards the scavenge pickups? Its too late now but placing the pickups dead center in the pan would be a better design. One in the front and one in the back. Inline filters between the pickups and pump will save the pump housings from debris in the event of engine failure.

https://www.rx7club.com/attachment.p...1&d=1248703690

https://www.rx7club.com/attachment.p...1&d=1248703690

Also you need more practice with TIG. I thought your welds were MIG. You have too much penetration. Are you using gas? Did you prep the metal? Scuff it and acetone it?

Grinding aluminum welds for appearance severely weakens the weld. They probably will develop cracks.

thanks guys.

to the above:

I will be using inline filters to the pump, so i am not worried about that.

I did prep up the metal and everything first, i was using gas, but this pan was my first time TIG welding aluminum.

how do you think i should construct the grooves? it seems like a good idea.

Use an end mill. Keep them shallow.

This should get you thinking. This is an old version. The design has since been changed to what I described above. The mesh is JB welded window screen. It saves the pump from the larger chucks of bearing material.
https://www.rx7club.com/attachment.p...1&d=1248715456

TIG welding aluminum seems to always require more current than you think. I'd expect about 120amp for the fittings you welded onto the pan. Start the pool on the thicker piece of metal then drag it across to the thinner piece while filling. You might want to experiment with preheating the parts using an acetylene torch.

ok, i'll keep that in mind.

As far as the aluminum welds go, do you think i should re-make the fittings? It was a first attempt, and so far, i am only really pleased with the way it looks visually.