Custom turbo manifold interest?

[yudkib]

turbines are much harder to size, because theres no clear cut relationship between A/R and shaft rotational speed (from what ive read). you cant just say "if your engine needs ___ lb/m of boost to maintain ____ psi, the rotational speed with ___ compressor means the shaft goes ____ RPM and you need ____ A/R on the turbine".

so much comes into play with VE and airspeed velocity its impossible to calculate empiracally. things that happen in the manifold have a big impact on the A/R... from what ive read, everything says you can only ballpark A/R or go on experience. things like the backpressure created by the bearing resistance versus the forward flow out of the head/manifold... its just two forces working totally opposite one another

 

[Valk]

Would be nice if turbine data sheets included the behavior at a specific cfm. kinda like compressor maps tell what you will get at what shaft speed.

 

[yudkib]

it would be nice, but it wouldnt be indicative of anything.
this is strictly what i recall about the issue from memory, so it could be wrong and should be taken with a grain of salt. if i'm off base, i hope someone corrects me - im receptive to learning.

the shaft speed is based on the ability to apply force to the turbine blades (the exhaust volumetric flow i think?) which has zero to do with the intake side. youre taking an intake charge, adding fuel, turning it into a fireball, sending it flying out of the head and through some piping, then connecting it back to the same mechanical device it came from.
the variables from A-B like combustion effeciency, VE, manifold flow, head loss (maybe?)... all prevent a simple chart like cfm vs. shaft speed which you could translate back to the compressor map.

 

[whowa004]

any updates?

 

[StealthWyvern]

any updates?

Doesn't look it will.(silly)

 

[sen2two]

I know, i know... Fatti has been getting on me about this (my room mate). I don't have access to the equipment i was using right now. But i will again shortly. This will not just die out. It will be finished...

 

[justanothermp5]

bump

 

[boostedmsp]

I am interested in a t2 setup ( have a gt28rs ready to install) with a ewg. sub

 

[fatti03msp]

thats the setup ill be running so you will be good.

 

[rally2003]

bump, bump, bump, it up.

 

[rally2003]

I'm going to need one here pretty soon, but might have to make one myself, depending if this one taks off or not. Might be getting another car so I can tear mine apart for the winter for next years SCCA. Can't wait to dump a little money into my car to make it go a little faster and stick to the track a little better.

 

[Signature Sound]

I'm going to need one here pretty soon, but might have to make one myself, depending if this one taks off or not. Might be getting another car so I can tear mine apart for the winter for next years SCCA. Can't wait to dump a little money into my car to make it go a little faster and stick to the track a little better.

did you get in on the under brace group buy? BlueWolfCry has one going on, but they are just like the GT Spec anyways...

 

[SCMP3]

we need a few more peeps to get a discounted price....

 

[mgerst1]

interested in manifold, the top mount looks cool

 

[destineal]

pricing?

 

[OH10_MSP]

Interested and Subbin...

 

[Jondar]

interested as well, any updates?

 

[sen2two]

WELL...... after a WAY to long layover on this. I finally have my equipment handy again. This will now be underway once again!!!

Sorry for the extra long hiatus, but that's over now.


We did a test fit on fatti's car and it was OK. But seeing how i like everything to be perfect... changes need to be made. Although the bullhorn matching each other in height looks better, it makes the 2 outer runners slightly shorter than the inside runners. This will be changed for equal runner length. So basically I'm going to pretty much cut that manifold up, make the changes and then test fit, test, fit, test fit. Then run it HARD to see the improvements and find ay week spots.

Updates coming SOON!
KTEC

 

[fishdonotbounce]

YES. Any idea on price? I'm starting to price things for my build in a year or so.

 

[SeR_Cyclops]

Pics pics pics!!!!!