262's 85 Fiero SE LX9 F23 swap thread lots of pics

[ericjon262]

re-worked intercooler mount.



hopefully for the last time.

[ericjon262]

well, today wasn't all that productive... my intercooler bracket I had made was in the way of everything, so I cut it in half, and and re-did it, now it's holding on by the A/c compressor bolts, but I need to find longer bolts to hold it. I also put the interior halfway back together again. I'm hoping tomorrow is more productive then today was.

[Superdave]

I just finished some exhaust work on my car, my slash cuts are in the X pipe and i had the system open right after it. There was oil in the pipes for sure, and in the mufflers. lol

[ericjon262]

I only have one catch can, I was referring to having two slashcuts.

[TGP37]

Some types of dirt/air separators spin up the air and dumps the heavy material out while ejecting clean air, no moving parts and really simple design. I am building one myself. Might do well to seperate the crap out of the gases.


A: Blow-by IN
B: Oil to catch can OUT
De: Clean air OUT

Smoking exhaust could also be from the lack of crankcase ventilation. My 3100 idles a little smokey if I pull the crank ventilation. Clears it right up once I plug it back in. Something to do with the oil coating the cylinder walls.


I say use both catch cans and then inspect the amount of oil in both. You'll get a good idea how well the first one works. Then can decide if it is needed or not (the second one).

[ericjon262]

The slashcuts work but just make sure they are after your o2 sensor and hope you aren't embarrassed by a little smoke at WOT... lol


I'll have to go back and see what the results were but last year i hooked a 2 bar MAP sensor up to the crank case to monitor the pressure, IIRC it drew a very slight vacuum at WOT.

I'm hoping the catch can solves the smoke issue. I have two, and I'm trying to decide whether to use one or both.

[Superdave]

The slashcuts work but just make sure they are after your o2 sensor and hope you aren't embarrassed by a little smoke at WOT... lol


I'll have to go back and see what the results were but last year i hooked a 2 bar MAP sensor up to the crank case to monitor the pressure, IIRC it drew a very slight vacuum at WOT.

[ericjon262]

mostly complete catch can made almost entirely of scrap:



I also got the downpipe welded up, and the WG bump integrated. all that's left in the exhaust is the slashcut, Vband on the muffler, and the tailpipe. some of the welds look like crap, the fitup was less then ideal, but it's sealed, and strong, and won't be visable an



I also got the fuel system pretty much done, just needs to be tied back.

[ericjon262]

good news, the fuel system is pretty much done!

Man, what are you gonna do when your drifting out at sea, proudly serving us all at home?

study coding, so I can hopefully start making our PCMs a little more useful...

http://60degreev6.com/forum/showthread.php/50981-Getting-started-coding?p=463224#post463224

[TGP37]

well, I'm gonna make a catch can, and run the slashcuts with the stock PCV and checkvalves.

here's a interesting read on PCV.

http://honda-tech.com/showthread.php?t=1199935

That was a good read there.

I went with exhaust slash cuts to avoid sucking in vaporized oil fumes. The oil fumes will lower octane and encourage detonation. Normally not a problem but when pushing to the limits with boost avoiding detonation is important. More so for me since I use hypereutectic pistons and gaped the top ring ever so slightly to avoid ring butting under excessive heat. So my blow-by is slightly elevated out of boost. (for the particular minded, I gaped only the increased expansion from added heat expected....making the ring gap act like stock under boost)

This is why I like the dual type bernoulli system. The intake can handle lower octane at idle. But when in boost the check valve closes and the exhaust generates a stronger dominant vacuum. Pulling all that garbage out of the intake. Cause blow-by is not anything you want in your intake if you can avoid it. Nothing but octane reducing, hot, oxygen deprived air....yuck!

The dual system pulls the crap in at idle during emissions inspection as well.

Best of both worlds, imho.




Man, what are you gonna do when your drifting out at sea, proudly serving us all at home?

[ericjon262]

got my AN fittings in for the fuel rails, so tomorrow I'll try to get the fuel system finished up. I'm glad they aren't red like int he picture on Marc's website, they appear to be clear anodized.

[ericjon262]

got started on the catch can today.



still need to add fittings, and it's pretty big though, I might cut it down about 25% to make packaging a little easier.

[ericjon262]

well, I'm gonna make a catch can, and run the slashcuts with the stock PCV and checkvalves.

here's a interesting read on PCV.

http://honda-tech.com/showthread.php?t=1199935

[TGP37]

What prevents you using the exhaust? I have mine 1 foot ahead of the catalytic converter and it draws a nice vacuum in the upper RPM.

(I ask under the guise it may help out Eric's build, being this is his thread)

[Nick-G]

Or do both and use a restriction. Allows for more vacuum AND bleeds in fresh air.

Vacuum will do more to keep the oil clean versus fresh air feed. Vacuum reduces blow-by through stronger ring sealing where fresh air feed just dilutes it. Besides, to get the fresh air in the crank case there must be a negative pressure gradient present anyways.

I gotta say Nick-G, I was thinking up the same set up the last few days. Engine vacuum draws the crank fumes at idle, both draw at part load and the exhaust takes over the draw in boost. Only thing is the check valves need to withstand oil/gas.


Can't a dry sump oil pump also act as crank case ventilation? So says my buddy from across the office.

I considered using the exhaust myself and even bought a slash cut fitting from summit racing but due to the way my exhaust is setup it won't work in my case. Speaking of which if anyone needs a slash cut ill sell it for cheap.