Hiya chaps

just bought a FMIC and piping for my FC ( 1990 UK TII )

its come off a FC so i know that it will fit , but its been made to fit with the stock elbow - so it does a U turn out of the back of the engine

i can remember reading somewhere that you can use either the FC EGI elbow , or a stock FD elbow - but i cant remember which one ??

i have search on here for about 30 mins and cant find what i wanted - so its just as easy to ask !!

i know that you can get a "hat" for the TII - but im doing the FC on the cheap - so dont want to be throwing money at it if i can get around the problem

im sure that i read it on here that a guy used to race a FC with a FMIC and use a elbow and it would handle 20psi all day long - like i said - cant remeber if it was a EGI or FD one ( was DEFO platic though )

any ideas on this ??

Stu / Grinder

 

https://www.rx7club.com/showthread.p...=plastic+elbow

think this is the thread

is this a straight swap or do you need to do more stuff ??

not sure i like the idea of changing the oil fill tube though

Stu

 

I've got the same kit, that does the U turn. It's a greddy item, and hasn't caused me any problems at all.. was running 1.1bar no worries.

 

so the u-turn out the stock throttle body is fine ??

if thats the case then i might install as it is

and 1.1 bar is more than im hoping to run - im happy with 11psi to be honest - just wanna drop the temps

Thanks for the reply though

Stu

 

That TB elbow fits fine on the TII TB. I used it on my old FMIC setup. My old setup





I know, I know. Its hella dirty.. but oh well.. it worked.

 

I got a new polished actual Greddy Compression Tube... from a guy on the forum for 90 bucks..... i think he has more if you want his name

 

Just because you can, doesn't mean you should. There would be a significant pressure drop involved in first reducing to 2" and then doing a sharp 90deg turn. That means you're working your turbo harder to achieve that manifold pressure than you would with a smooth large-diameter TB entry, and that means the intake temp is higher than it needs to be.

Personally I'd never use the stock TB entry with a FMIC even if it was part of a kit. It just seems like such a nasty compromise when you've gone to all that cost and/or effort.

 

got a friend who is going to dig out a throttle body for me ( i think ) - so may go down that route

 

According to Maximum Boost, the penalty for lots of turns in a charged intake tract are negligable. I do believe this was his opinion, so if there is some scientific proof otherwise, then please present it!

 

humm i suppose its not the easiest thing to test if the U turn does make a difference

not sure what to do to be honest

might just fit the thing when i have chance - odds are - its better than the TMIC !!

 

me again

here are some pics of the FMIC and the piping it came with

https://www.rx7club.com/showthread.p...=1#post6614245

 

You really need scientific proof that it's harder to turn corners than go in a straight line?

Besides, my point was that a 2" bend onto the TB (plus the change of direction in the TB) is a lot more restrictive than a 2.5" or 3" pipe going straight into it. Even just comparing straight pipes a 2.5" pipe outflows 2" one by a huge amount.

Ah, Evo...

I've got an Evo 4 intercooler that I tried to fit, but it was going to require more hacking than I'm happy with.

 

errr not sure how much hacking is involved - will find out when i remove the front bumper

from what im lead to believe - its just 2 holes cut into the inner wing and thats no biggy to be honest

 

Well, its fluid dynamics. A little more involved. Again, I was stating what I had read in Maximum Boost, and he didnt provide a whole lot of scientific evidence for or against tight radius bends from what I recall. I was just curious if you had some other information. Why do you take it personally when I ask you for sources for your facts?

Of course, I have no disagreement here.

 

Maybe I should've worded that slightly differently. Do you really need scientific proof that it's harder for air to turn corners than go in a straight line? Pressure drops though bends is pretty fundamental fluid dynamics.

I'm not taking it personally, I just can't be bothered proving something so obvious. I'd be interested to read the actual quote from the book, in context. It seems very odd to me that any would would claim that "multiple bends" will have "negligible" effect.

 

to be honest im not sure what the FMIC wil actaully do to the car apart from lower temps ??

is there any other benifit from one ?

Stu

 

That's exactly what it's supposed to do. Lower intake temps give more power, more consistant performance and higher resistance to detonation.