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Attachment 716409

I was wondering, what should I do with these passages when building a header?

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Should the flange just block them off? Or maybe I should modify the flange so that the gases that pass through those ducts get routed into the exhaust tubes?

block dem bitches! can you get exhaust sleeves that don't have the EGR port? I'd do that if it's not crazy expensive.

Hehe, I plan on not running exhaust inserts at all :)

Just like you see it there in the pictures... nooo inserts!

yeah I just noticed that with the fully assembled block... why are you doing that???

If you check some of the first pictures I posted, you'll notice that my engine originally had the classic "NA inserts" in the exhaust ports -- these have those undesirable baffles that are a pain in the ass to grind so I decided to do a little research on running the engine without the inserts altogether.

I found that very few people had actually tried this, but the few that did were actually very happy with the results. Regarding engine temperatures, they should only go up by 1~2ºC.

Wouldnt worry about it, look at his center iron...no EGR port.

you have quite a neat little project going. it's kind of trippy looking at everything from the fact that a '91 model came with so much older technology to watching you build the engine from back to front. :) everything seems to be coming into place.

Hehehe :lol:

I was waiting for someone to notice that detail!

Hmm ran tb mod/ported tb full emission removal and idle was solid 750ish after warm up.

how do the itbs work and can they just go on any na with exhuast and intake mods? and what is the exact benefits of them?

In a warm climate that would work.

I've gone through the trouble to put mine back. Helps a ton when it's cold out. I've had to start my car when it was 25 degrees out. That won't happen with a TB mod and no BAC, unless you want to sit there with your foot on the gas and pray the car won't flood if you fail to keep it from stalling.

^Lived in north dakota for most my life where winters are @ -30f asa norm. This was when my 7 was a daily. Today its a different story. Mushiki...Tweakit ITBs=awesome town.

I wouldn't run without the exhaust sleeves. Get a set of turbo sleeves perhaps?

Dibs on the LIM when you don't want it anymore. :suspect::lol2:

this is my fault . . .


maybe also ....

Noticed in one picture the new engine sitting horizontally without the front crank bolt installed... I sincerely hope your thrust bearings aren't crushed.

The coldest temperatures you'll experience down here in Winter are about 32ºF


Hehe, they look pretty good ;)


Why not?


They aren't, I promise.

subscribed... interesting that so much of the engine is different than what I'm used to since it's a Euro-spec.

You'll need a standalone EMS to run ITB's.

okay thanks they look fucking badass

you suck! and you'll continue to suck until i get back to Florida :D

(by the way, i've always been in love with your country)
supposedly, there are issues with flow. i say "supposedly" only because i didn't do the testing and i don't have the numbers, not because i don't believe it - because i do. in most cases, the turbo sleeves help to get back what you would lose by running no sleeve at all.

^its a velocity thing, makes for a peak engine. Ina np or pport race engine where u gonna see 7k+, no sleeve will jet some more per. Ona streetported motor like this ur prob only hurting the powerband.

Sorry for the typos, autospell ona phone and can't edit.

I understand that it "might" hurt the powerband down low and/or make it more peaky... we'll see -- like I mentioned before, there isn't really much data or experience on running the engine with no inserts... and the only information I managed to gather was actually favorable.