I just got the HKS Racing Bypass Valve I bought. Got it welded to a pipe, then had to cut the pipe and twist it so it would fit under the hood, but all was good in the end.

It sounds sweet, high pitched at low boost (2-3), like greddy type-S kinda at middle boost (5-7 psi), and just a loud rush of air with a kinda high pitch as it closes at high boost (14psi).

I was surpised to see that it even opened a little at 2-3 psi but it did. Looks good too.

 

another pic

 

final pic

 

is that orange RTV ???? if so go buy some ultra black!

other than that looks nice

 

haha yea
RTV orange. I am changing to black in automec tomm. at school. I ran out here at home.
M-P

 

do you realize how ******* hot the air is thats going into your intakes? You've got a nice setup going except for that. You even have a fuel pressure regulator on stock twins? what kinda fuel setup?

 

The intake air on my car is no hotter than any other rx7s with a front mount intercooler with the radiator being vertical. If you know of any I'd like to see a better setup under the circumstances other than a headlight cover inlet.

I have th K2RD Secondary Fuel Rail w/ 1680cc injectors, the SX FPR, and Denso 500HP Fuel Pump. Needed because I was running sequential and had 98% inj duty, so i went nonsequential and upgraded the fuel system as if i was getting a single turbo which i am in the next couple of weeks. Which will drop engine bay temps alot.

M-P

 

sorry to ask a silly question but i've not heard of them... what's it do? how much etc?

looks a bit like somminc I had on my prevoius car, saved fuel but increased performance kinda thing? Pressure value?

 

It might drop your charge temps(depending on what boost you run) but it probably wont do much for your engine bay temps. As a matter of fact there is a old thread in the single turbo section about wires and such melting after going single turbo......from the additional heat. The thread is very old but you might find it with a good search.

 

my car ran much cooler with the single turbo setup. how many stock turbo FD's run 180F beating on it..... DP is more efficient......everything is more efficient except the money spent

 

He was refering to underhood temps not coolant/air temps. A lot of single turbo guys have to custom make heat shields and such just to keep from melting near by wires...like the O2 sensor wire, ect

STEPHEN

 

Yea when i said engine bay temps, I mainly meant infront of teh turbo, not necessarily wires and stuff behind the turbo, but stuff in front that might lower the intake temps.

FNM: It is the exact same thing as a blow-off valve. It is HKS's older style one that costs much less than the new one. It is $205 dollars. I like it alot. It has the 12-18psi spring in it. When I go single I don't plan on running more than 18psi, but Im sure it will hold more anyway. If I am thinking right it is like the Wastgate spring that holds a certain amount more than what the spring says.

Oh yea FNM, what is a somminc?

 

i never had any problems like that ? interesting

 

Vosco - I think if memory serves me right your running a custom heat shield that someone made for you.....or maybe I'm thinking of someone else. If you are running a custom heat shield thats probably why you never had any problems.


The cooler air with a single turbo isnt really caused from lower engine bay temps. The main thing a single turbo does is they are more efficient at higher boost levels than the stock twins. The more efficient the turbo is the less it heats up your air when it compresses it, this is why when running high boost a single will usually have cooler intake air temps than the stock twins, its not really caused from cooler engine bay temps.

SOME singles can also help with coolant temps as well. The reason though isnt cause they run cooler its cause the stock twins are water cooled and the coolant goes thru them. There are a lot of singles that are NOT coolant cooled there for the coolant doesnt go thru them...hence your coolant temps may be lower with those type of turbos. Really though, as long as your temps arent out of hand with the stock turbos(which would no doubt be caused by something else) it doesnt really matter. The ideal coolant temp is 190-200F (according to some major tuners I've talked to) and I never had any problem staying around that range when I was runnig the stock twins.

STEPHEN

 

i did have a custom heat shield..........that hasn't been on the car for a long time and nothing bad happened but i see your point. among all the benefits its nice to say hey that's my turbo not that's my turbo's and my wastegates and some wires and some solenoids and stuff

 

Yea, I agree that rats nest and all that **** that comes with a seq system is nasty to look at haha

It was worth going non seq to me just to get that **** out of my engine bay. There is actually NOTHING under my uim excpet my injectors. I can acutally touch the top of my engine without moving anything out of the way haha

To me that is the main benifit of going non seq or single.....well obviously you need to go single if your running a ton of boost.

STEPHEN