adams car still has the cleanest interior of a 25+ year old car i've ever seen!

um, and jesse's 944 is coming along i suppose, but he doesn't really have any money to get that bitch built up.. the plan is to use a built s2 block, which is a 3.0 instead of a 2.5, with the twin cam/16v head. Probably just going to use a t4 turbo; should be the hell of a ride when its done! you never see 3 liter four cylinders!

haha awesome, we all have to meet bro, oh and adams car is worthless lmao he went overboard with a msd set + radio so he gutted the car once to run the wiring and ever since its just rigged..... on and did i tell you he crashed it twice already lmao... noob.

ah damn that sucks! he had such a gem on his hands...

Good looking project you got there:icon_tup: Just take it one day at a time and your goals will be here faster than you can say to a chick (wanna see my wankel??):lol:


Good luck..:):icon_tup:

thank you!

as of right now, i just bought a shell with a carb'd NA 13b so i can drive the car around until this engine is done.. but money is tight..

i'll post up once i have an update.

Man i've been waiting for you to update this thread. Whats the deal? Hope you get things back on track soon..

i'm poor!:lol: so its taking a little bit..

if anybody is trying to get rid of any used working parts such as:

microtech lt8+
tial 60mm gate
tial 50mm bov
bosch 044s (need 2)
FPR capable of flowing 10000cc/min at 60psi
t6 flange
engine manifold flange

and if anybody needs any of the following as well..:
holset hx35
asymetrical t3/t4 manifold
downpipe and exhaust for the holset (3")
and an 88 2+2 shell, most panels are perfect.


if i can get some deals on some parts, and sell the others, then this build will be done before you know it!:nod:

aww build delays :(

Interesting build!

why do you need a FPR that flows 10 liter/min when two bosch pumps only flow about 5L?

its possible i did the math wrong, but it was with e85 in mind.. but i have a new plan now as far as fuel delivery, so it doesn't even matter.


i'm actually probably going to buy a stock as hell 13b-re block, and bolt everything to it, just so i can drive the thing, and once i do that, the pp block will start taking shape again.

i also wanted to know what anybody thought about this:


http://www.turbobuick.com/forums/att...imgp1836rs.jpg


i wonder whether this would perform better over a fully divided mani, assuming both were built and tuned for equal length runners.



i am however employed now! so it'll start coming together sooner than later.

there was a disscussion about this on another board. Looks like a good idea to me. I would suggest to at least tag weld the throttle plate to the shaft, would not trust two small screws in that enviroment.
Very simple way to try the effect of the throttle plate would be to make a special "turbo gasket" which blocks of one of the two scroll inlets. Just clamp it between mani and turbo. It would require that your mani is not completely devided obviously. It would allow for an easy compare between spool rpms full open vs half open.

Been watching and waiting for your build thread to come back to life.:nod:

thank you!
i think you should make a build thread of your own man, i really enjoyed seeing what you had built in that video..:icon_tup::icon_tup:

That actually works great, at least based on the data I have seen from non affiliated individuals...it would probably be more beneficial in a 20B application like mine because a true divided manifold is not doable but even in a 13b it should be somewhat beneficial if your turbo is overly large. I dunno if it would really benefit anyone running a divided GT35R/60-62mm turbo with a properly designed divided manifold or that it would be worth the added complexity but on a 20B I'd say its definitely worth a try.

Diesel's have been using this for decades and that is part of the reason "twin scroll" turbos were invented in the first place. They dimensionally cut the A/R ratio in half, functionally its only spools like a turbo with 2/3rds the A/R ratio but it is still significant. I will be installing one of these in my setup so watch for it in the 20b section.

Chris

Nice project.

I really like this built... very nice drawing skills too..

I have a small suggestion about the manifold twin scroll setup.. the way it's pictured in the photo is imo the wrong way to do it, you have to make it like in the picture below, use a fully divided manifold, make a large flapper, and make it so that in the open position it works like a fully divided manifold and in the closed position it will look like a nice Y shaped collector..

I also like the roller trottle bodie, can you maybe share the inventor drawing? I'm planning to use the same on non turbo 13B PP I will built someday, will get telescopic intake much like the 787B..

measure the two lines though. The flapper would not be long enough to seal it and make it divided, defeating the purpose. The way he had it is the way it was designed to be used, and it appears to work well on piston engines. However, I still think going fully divided manifold-turbo is still better overall on a rotary.

Offocurse this was just a quick paint sketch lol, but the point was to show the principle, this design has the advange of being full divided while still being able to use twin scroll principle with a nice Y shape collector, because we all know turbos like gas speed

Great. Post a thread after you've done it to show your success then.

Won't try it.. I just tell you it's the way it has to be done. the other setup is both restrictive and doesn't have divided manifold benefits..

If 20B will ever get back together it'll get holset vgt =)

thank you very much!

as far as the drawing, i agree that it is a good idea; however, its function could be interpreted differently by different viewers, so i'm not sure exactly which way you were looking at it.

if the axle of the door on your drawing is right in the middle, then it'll work well. If it is off to one side or the other, it wont seal though.

i would be using a worm-gear reduction drive type motor, so it would get sealed well, due to that kind of gearbox's way of getting locked up.

either way with this build, its going to start with the single s475, then i will see if i could gain some response with the 1.10 a/r housing. if it is still too laggy, then i'll look into doing this "quickspool" valve.. If spool is still undesirable, then i'll try to make it sequential.. :lol:


but all of this right now is just a nice thought; i need to focus on getting the engine together and running how it is.

I would imagine on a pp engine that the turbo would spool up pretty easy.

gus has 20psi by 4500rpm on a s475 with a 1.1 t6 and hes on a streetport so im sure you will be fine

thats what i'm thinking..
from what i've been told, pp turbos come on extremely hard and fast.. so i might actually have to put a butterfly restrictor after the turbo, to shape the powerband.

i suppose it would work in accordance to what gear i'm in, and how easy i loose traction in that gear.. haha

well the only concern, daft as this sounds is that your turbo might not be big enough...hear me out.

When gus made 595whp at 22.5psi of boost the max power was only at 7100rpm thats a 1.1 83mm rear wheel
When enzo made 709whp at 32psi of boost the max power was only at 8200rpm thats a 1.32 96mm rear wheel.

i have a feeling that when you get to high rpm where you PP should really sing your power will drop off as you run out of turbo.

Id maybe look in the swapping it for a bigger rear wheel and a/r

to be honest thats all theory and i might be all wrong but sounds like it makes sense to me.

id just run a gear dependant boost controller, low gear+low boost etc

only testing will tell i guess..