How did you come to the manifold you guys chose and why did you prefer the manifold to lets say forward facing, top mount, cast iron, log manifold stainless steel and what not. Pic also please, just want to see the various types of manifold out there and the power present by them.

 

Read the faq at the top, thrre is a link to manifold comparisons. I would give you the link but im on my tablet and still trying to figure out the copy and paste feature haha.

 

Should try the search button!!! It works!

 

is this one way of figuring out what your options are?

 

Forward facing manifolds are normally divided t4 flanged and for all out race applications and huge turbos youd never run on the street.. you can't really put a filter on them and they are normally reserved for air to water intercoolers.

Top mounts most people like for looks, longer runner length means higher loss of exhaust gas velocity and temp which ,means more lag

Same with ramhorm manifolds

The average setup would be fine with a cast Mani, log or a mini log/mini ram. Ive seen people make 600 on a log manifold without issue. The 4 manifolds I just stated will also have the quickest spool if you were to take the same turbo and motor and swap the manifolds around.

 

this is pretty much all false but ok....

 

^ curious as to why you think thats false?

 

we have built a lot of foward facing manifolds that are open collector, small turbo, and street driven daily with filters and air/air ic... i dont get the generalization here its completely unfounded.

 

Manifolds (as with the rest of the turbo setup) are built around specific goals and uses for the car. Once you figure out what you need, find the manifold to fit. I can't imagine most people are picking manifolds for their looks, but rather their function...

Don't play stupid. I underlined NORMALLY which he used to qualify his statement since you apparently glossed over that the first time. And on the whole, Wantboost is right....generally** front-facing manifolds are not for street use, but i'm sure you can use one if you really feel like it. Although, I can't figure out why anyone would

 

I build what people ask for man... Normally is still a gross generalization.

 

Top mounts are normally associated with high power levels, however, most cars I see them on don't break 400 and when asked they say it looks cool

Longer runners (uncoated/wrapped) always equals heat loss to atmosphere, which in turn means cooler, slower exhaust gasses, which equals lag.

Ramhorns are a very popular choice, they support decent power levels but dependant upon design you'll have a hell of a time with the oil return, I know mine was tricky

Most power levels for street cars can be done on a mini log or smaller, they offer a compromise between spool and power

PFI, I meant it as a rough generalization based off my experience. Please please feel free to post examples of your work and the chassis purpose,

I've been very curious about running a front mounted gt30r setup and would love someone of your position to advise me, again I meant no disrespect or harm by my statements.

 

You talk about the spool difference as if its 1000's of rpm. Spool difference from a quick 4 to a ramhorn to a top mount is so minimal its pointless to even mention. Tubular logs are junk plain and simple. They make power but super back pressure, the runners dont flow to the turbo they just all cram together. Cast logs are better than tubular logs. At least they direct the exhaust gases toward the turbine. BUT with all this being sia dits what fits best for the application your putting these parts in and what goals you are trying to achieve

Im running a PLM top mount with a 6266 and the turbo spools like a SOB. Its spools faster than my 57 trim did on a cast manifold. Just sayin,

 

Well your setup is well thought out needless to say. And things are coated/wrapped are they not? I was referring to uncoated setups

Someone did a comparison from log to tubular on an s2k, high power numbers, but I can't seem to find the thread

Most manifolds are within a few hundred rpm in spool, with the top Mount thou, I've seen later spool times than all the other manifolds

 

no wrap no coatings. i NEED to get one or the other done because it heat soakes the **** out of my radiator after a couple passes at the track but other than that its been good to me.

I agree a well thought out setup works wonders vs a slapped together something that wasnt properly thought out.

 

Coating works amazingly. you basically hold your hand on a coated manifold at idle

Wrap works well too but I would avoid the old stuff where you have to wet it, heat cycle it so it shrinks, etc. And go straight to DEIs lava/titanium wrap stuff. Doesn't need to be wet to apply and withstands staggering levels of heat, just to give you an idea we have a catted pfadt x pipe on out c6 z06 and we wrap both converters (and we all know how hot those can get) and it takes the abuse like a champ, no burning, scorching or wear, plus you can put your bare hand on the wrapped cat with the car running. We've used this wrap on our last 3 x pipes we got for testing

Thing about wrapping and stainless steel, if the wrap isn't perfectly tight and close (I like to overlap a bit) then you can cause the metal to develop hot spots and become brittle and crack, or moisture gets in between the wraps and the metal and causing staining/discoloration. When I wrap stuff I mount it to our work bench and I'm working towards getting each wrap as precise and tight.. and I use a lot of banding to ensure it stays that way.

 

Here's a comparison of two of my own previous setups....it shows that manifold choice, when it relates to how a turbo functions with a particular engine, makes a big difference. The setup was an STC GT3255b .63ar originally on a topmount, then due to the wastegate elbow cracking, I changed manifolds to an SLS miniram. The comparison speaks for itself. The setups are identical (and at the ragged edge of the OEM 1.8bar map sensor's limits ~10.5psi)

Comparison VS the Topmount


You can see that by mating the proper manifold-turbo-engine combination, you can achieve a much broader powerband. Granted, I only made an additional 9whp, but the breadth of the powerband increased substantially. If you want to read the entire thread, the link is below.

https://honda-tech.com/forums/showth...5#post29099755

 

The difference, at least in my own experience, was a bit more drastic than a 'neglible' increase in spool...the boost plot is along the bottom of the following picture

 

Another properly setup vehicle and all of it worked very well together with the miniram.

 

Yea an almost 700rpm less to make full boost, that's not little at all lol

 

Well I normally am in agreement with things you say but when it comes to racing we know every little bit counts and everything adds up.

 

Depends what kind of racing were taking about. Drag racing the rpm won't drop far enough for any of that to matter, for road coarse you drop low in rpm coming out of corners etc and quicker spool will change everything. Not going to be running a 6266 on a road race though IMO smaller with wider powerband is more
Important in that application than a larger peak power setup used I drag racing

 

For me the biggest issue was keeping A/C since it's my daily driver so that limited my choices greatly. I went through 5 manifolds (and 2 turbos) including some Ebay cast logs that claimed to be A/C compatible before getting a tubular unit from go-autoworks that fitted.

For me personally finding a mainfold/turbo combo that fitted properly and left a/c and p/s in place was probably the hardest and most frustrating piece of the turbo puzzle. After that everything else just followed and fell into place.

 

Very interesting, in which the manifold stopped your choice?

 

I agree with the above.

Years ago we swapped from a ram horn to a top mount on a 35r all else the same. The result was almost no difference. The average top mount setup we build have not suffered from a loss of spool time. The one thing I do not like is that these manifolds have a tendency to vibrate like a tuning fork at certain frequencys and create quite the annoyance while driving.

I think a mini ram and ram horn is fine for 95% of the crowd. Log manifolds made from weld T's are junk.

 

interesting the pissing match here...