FieroGT/4E introduction (Page 10/13)
ericjon262 JUL 25, 06:29 PM
any updates?
sleevePAPA JUL 26, 11:26 PM

quote
Originally posted by ericjon262:

any updates?
fierogt4e AUG 01, 10:10 PM

Well I've been about half sick for two or three weeks but I tried to putter a couple of times'
Tonight a coworker helped me with the CMM (coordinate measuring machine) and I have some of the numbers I need.

The cylinders ARE offset 1.5mm (.059”)outward from the old cl. Center-line.

The odd numbered cylinders on my motor measure at .0572” outward
The even numbered cylinders on my motor measure at .0624” outward.

The odd numbered cylinders deck flatness .0004”
The even numbered cylinders deck flatness .0008”

The odd numbered cylinders deck height 8.8187”
The even numbered cylinders deck height 8.8154”

Yes a CMM is accurate to four decimal places.


I mounted this little controller on my old mill. But it wasn't plug n play so I shut off the lights and called it a week. Its a variable frequency controller. You set the manual speed at one setting and forget it. To go faster you push the up arrow. And to slow the down arrow. No belt changes or turning the crank.
Maybe Sunday I'll try to program it.

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Sincerely
George

sleevePAPA AUG 01, 10:46 PM
So it's not exactly a 60* bank? How is that going to affect cam timing?

Thanks for the info!
fierogt4e AUG 02, 01:22 AM

It looks bad when stated in mm, it looks questionable in inches, but when you convert it to degrees it's not so bad. My calculations do not have notes and are not complete but it maybe less than one and a half degrees. It'll be a couple days before I can ask my calculator to do the math for me.

1mm at the deck is .636degrees if I read my note book page right. Maybe Wednesday I can redo it now that I know.

#1 Maybe you can split the difference and call it good.

#2 Index the crank so every thing comes out 120 degrees. (confusing for crank guy)

#3 Index the cam to match the crank/block. (confusing for cam guy) custom cam a must.

The block is at 60* , sort of, but not the rods. Set TDC on cyl #1 rotate to cyl #2 TDC its more than 120* unless corrected. Did GM fix it??? HOW??? OK?

It seem as tho other builders are not looking at this. It bothers me.

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Sincerely
George

Dennis LaGrua AUG 02, 11:08 AM
Great fab work and excellent design engineering overall. You have a car that few Fiero owners will ever have. The only thing that I question is if you have sufficient engine compartment ventilation (such as in traffic) but you can always put a thermocouple probe in there and when on the road, monitor actual results . This is a very inspiring build,so keep the progress pictures and videos coming

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" THE BLACK PARALYZER" -87GT 3800SC Series III engine, custom ZZP /Frozen Boost Intercooler setup, 3.4" Pulley, Northstar TB, LS1 MAF, 3" Spintech/Hedman Exhaust, Autolite 104's, MSD wires, Custom CAI, 4T65eHD w. custom axles, HP Tuners VCM Suite.
"THE COLUSSUS"
87GT - ALL OUT 3.4L Turbocharged engine, Garrett Hybrid Turbo, MSD ign., modified TH125H
" ON THE LOOSE WITHOUT THE JUICE "

fierogt4e AUG 07, 11:42 PM

I think the block angle is 61.023 degrees. Much less than I originally believed.

I've been thinking a lot about if I should compensate for the one degree or not, and how.

I'm going to correct it in the crank. I will be doing some work on the crank anyway, so wile we're at it, change this too.

My plane, for the moment, is to keep the odd cylinder crank pins in there normal position. Then follow them with the evens only 59* behind (61*,block + 59*,crank = 120* ). All other tings can be off the shelf parts. Only the crank is custom.

Unfortunately the money I was hoping for will not be coming in so some things will have to wait wile I pay off some bills. I'll shift back to the car until then.

For a little more good news I got the controller on my mill to run . So with a bit more effort I can put it back to work.

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Sincerely
George

fierogt4e OCT 09, 11:27 PM

Well, I made it through this summer. It's as if everything I own needed to be replaced or at least repaired, sometimes twice. That includes myself!

I received the Scat rods recently. They look real good I think. But will need the big end narrowed and chamfered on both sides to fit the 3.9 crank. Even custom parts always need to be modified.


With the stock rod siting on top of the new Scat rod you can see the difference in sizes ( 2 1/4” V 2”)


The stock rod is siting on top of the new Scat rod you can see the difference in heft. The Scat rod is more refined, more detailed, with all unnecessary weight removed.


The new rod dose not look much longer. You can see where mass has been removed on this end too.




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Sincerely
George

fierogt4e OCT 09, 11:55 PM
Here is a new video.


And the you tube channel with them all.
https://www.youtube.com/cha...oJ3CMtWvgEok8R-n3XRg

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Sincerely
George

[This message has been edited by fierogt4e (edited 10-10-2016).]

Gokart Mozart OCT 10, 06:08 AM
Someone took a stock plenum and cut the open spaces out of the runners to make it a large box but I can't find it but I found these.

http://www.fiero.nl/forum/A...031229-2-039981.html

http://www.fiero.nl/forum/A...040710-1-036848.html

http://www.fiero.nl/forum/A...060811-2-069096.html

http://www.fiero.nl/forum/A...050818-2-059634.html

http://www.fiero.nl/forum/A...100421-2-099063.html

http://westcoastfiero.com/p...ance-intake-manifold