Rakkasan's rebirth

[rakkasan]

Just a suggestion (dosent look like you've tapped for EGT yet). Since you've got it out, and have modded the the "wall" already, You could easily tap the mani like I did. It works great for an over all temp instead of just going off of #6. Again, just a suggestion.
EDIT: how do you post as a thumbnail?

Thanks Jimi, I'm trying to decide if I'm going to use an EGT gauge or not, but I'm probably going to drill & tap the hole anyway. If I decide not to, I can put a SS bolt in it to close it off. What size tap are the EGT probes?

As for thumbnails, attach your pics a attachments (the paper clip icon)

 

[jimi87-t]

The EGT I'm using is an Autometer, and the tread is a 1/8" NPT. The only place local that I could find NPT taps was at ACE hardware.

 

[Idealsupra]

IMO tapping for average temperature is stupid. You might as well know what the commonly hottest runner is doing rather then the average. id tap number 6.

 

[rakkasan]

Today progress:

Still haven't been able to pick up my motor from the machine shop. :icon_frow

Started putting it back together today. Put the A/C lines & condensor in, Brake lines & headlights.

 

[BlackDevilSupra]

Can you substantiate that the #6 cylinder is the hottest w/r to EGT? The head and coolant chambers in the vicinty of the #6 cylinder may run hotter than the the other cylinders, but this doesn't directly correlate to higher EGT's... If one wishes to utilize a single EGT sensor, then it's best to get an average of the combustion from all the cylinders rather than just one unless you can identify which is generally the hottest (and the hottest won't necessarily be that way consistently). If you must know how a cylinder is performing, then consider measure each cyl. individually.

IMO tapping for average temperature is stupid. You might as well know what the commonly hottest runner is doing rather then the average. id tap number 6.

 

[Idealsupra]

Can you substantiate that the #6 cylinder is the hottest w/r to EGT? The head and coolant chambers in the vicinty of the #6 cylinder may run hotter than the the other cylinders, but this doesn't directly correlate to higher EGT's... If one wishes to utilize a single EGT sensor, then it's best to get an average of the combustion from all the cylinders rather than just one unless you can identify which is generally the hottest (and the hottest won't necessarily be that way consistently). If you must know how a cylinder is performing, then consider measure each cyl. individually.

obviously without having a probe and gauge for each individual cylinder/runner the number you get is a guesstimate at best to what your engine is doing....

however 6 is commonly known to be the hottest....often detonation is caused from this heat and is the reason a LOT of bhg are in the number 5 and 6 cylinders.

personally i believe that if i keep that temp down the rest of the engine should be fine ASSUMING you dont have instant fuel loss which would create problems so quickly the egt gauge would be irrelevant anyways.

personally if youre gonna put it in the collector you might as well put it in the turbine housing or the dp....as the reading you get will be just as "useless" imo.

 

[BlackDevilSupra]

This is still speculation on your part because you've yet to stantiate your claims - you're just qouting "heresay".
Stick a probe in either the #6 or #1 cylinders and report back the average disparity between the measurement.
Oh yea, the 3 BHG's that I've seen have all been on the #1, #2, #3 cylinders. Is this an indication of fuelling aspects, heat, etc.. for those cylinders?
Again, it's best to get an average EGT, if you can't prove which cyl. is the hottest, and if you can't measure each individually.

obviously without having a probe and gauge for each individual cylinder/runner the number you get is a guesstimate at best to what your engine is doing....

however 6 is commonly known to be the hottest....often detonation is caused from this heat and is the reason a LOT of bhg are in the number 5 and 6 cylinders.

personally i believe that if i keep that temp down the rest of the engine should be fine ASSUMING you dont have instant fuel loss which would create problems so quickly the egt gauge would be irrelevant anyways.

personally if youre gonna put it in the collector you might as well put it in the turbine housing or the dp....as the reading you get will be just as "useless" imo.

 

[rakkasan]

Also, I'm using a ceramic coating that is supposed to work well. It requires the pieces to be baked at 600 degrees for four hours, which in turn stinks up the house. :biglaugh:

And here's some pics of my valve covers, too

 

[jimi87-t]

Looks good man! I was going to polish my covers but decided not to because so much else under my hood is polished.



BTW, with only one probe, average is best IMO, If you are wanting to keeping an eye on what you assume to be the hottest, then you need to put a probe in each. Or else it's pointless IMO. I would not want to go off of an assumption. Every engine and set-up is going to be different, way to many variables not to be (my BHG was on #3). Just like it would be to read O2 off of only one cylinder. Sure in theory it shouldn't matter, if every thing is perfect, but nothing is ever perfect.

 

[rakkasan]

Several people have asked about the ceramic coating that I used so I'm trying to put a blurb together about it. Only problem is that wife tossed the can (it was empty) and I now I cant recall the name of it. I will say this, if you decide to do it, make damn sure that you line the bottom of your oven with aluminum foil. I didn't & some dripped onto the bottom of the oven. Don't ask me how it did as it had dried before I put it in, but it damn sure did. I just returned home from buying a new oven because it stinks like shit when you bake your parts. Since some of the coating dripped off & onto the oven at 600 degrees, it bonded to the oven. Needless to say that my wife was a little pissed. :biglaugh:

I've made my decision about the hot side of the motor. I'm going with a 60-1 CT26 with MDC's ball bearing mod. I want a lot boost down low, so I think this the best route for me. I'm going to try for 480rwhp on a CT26.

 

[IJ.]

ROFLMAO @ "Needless to say that my wife was a little pissed."

 

[Allan_MA70]

cool an oven for the garage

 

[rakkasan]

ROFLMAO @ "Needless to say that my wife was a little pissed."

She doesn't share our sense of humor.:biglaugh:

cool an oven for the garage

LOL, I was going to keep it, but I'm out of space already & I has one of the funky 3 prong 220a plugs. Beside, I made sure to put all of the pieces I needed to coat in the oven the first time.

Hey, how about some help with BOV's. Is there such a thig as too big

 

[IJ.]

There's an Ad on TV here for a Parts Chain where the Hubby has some wrenches and valve covers in the dishwasher......

His wife comes out to the garage holding them and asks "What's this" waving a wrench at him...... he say's "A 9/16 open ender" she hits him in the head with it !

On the BoV yep can't be too big but can be too small!

 

[rakkasan]

There's an Ad on TV here for a Parts Chain where the Hubby has some wrenches and valve covers in the dishwasher......

His wife comes out to the garage holding them and asks "What's this" waving a wrench at him...... he say's "A 9/16 open ender" she hits him in the head with it !

LOL, that was me!

On the BoV yep can't be too big but can be too small!

So, If I bought a 50mm I can 'grow' with it? It won't be too much for an upgraded CT?

 

[IJ.]

Can't think of any reason to not use one other than the space issue Mark!

 

[dbsupra90]

looks like it is coming together nicely!

only prob i would see w/ a large bov is sometimes they have a fairly stiff spring in them. large valve = stiff spring = surge at lower psi.

as far as the egt, buddy did a test on each cyl and found #1 the hottest by 40F at peak. we attributed the fact to #1 cyl being the last to get fuel.

 

[rakkasan]

Thanks for the kind words, DB.

I think I made a lot of progress over the last few days & things are starting to come together. After today, there's not much more that I can do with getting my motor in (which will be Wednesday). Well, I can mount my FMIC when it gets here, but that's about it. My wife is happy that I have the fenders back on. :biglaugh:


I've spent the last few days clean & reinstalling the misc pieces the mount on the fender wells & such. Here's a few pics.

 

[IJ.]

Dave: Yep stiff spring but a LOT of valve area for the Vac to work on so it tends to cancel the spring so shouldn't have any low boost issues.

Mark: At least she's happy this time !

 

[rakkasan]

Mark: At least she's happy this time !

Yep, it makes life easier.

I spoke to the supplier about different springs for the Tial. He said that he has a 7lb spring and an 11 lb spring. I'm guessing that I should go with the 7 lb spring?