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Chad's Build Thread; Just like energizer bunny...it just keeps going and going and going!!!!
Topic Started: Oct 20 2009, 11:59 PM (12,040 Views)
Murf 59
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10+ for compression for a turbo engine is way to high. Most start out around 7.5 to 1 or even 8to1. Z34 was blowning his engines with just 7 lbs of boost. And if you are going to go turbo. Build the motor for that. Balancing is a must. You are going to be spinning it much harder. Because of this. The problems with the build will show up. Turbo/super charged/nitrous engines need extra attention when building them. Its very hard on the motors.
I have one of the G13 fly wheels too. Its going on the Starr car. I weighed it. It was 9.5 lbs. The G10 was about 13bs. With the bigger clutch it was still lighter than the G10. It will launch much harder with the lighter flywheel. But when you need the extra umph that the heavy flywheel gives. Like hard to climb hills. That is where it will suck.
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chads4dr


Mr Murf 59
Jan 6 2010, 02:43 AM
10+ for compression for a turbo engine is way to high. Most start out around 7.5 to 1 or even 8to1. Z34 was blowning his engines with just 7 lbs of boost. And if you are going to go turbo. Build the motor for that. Balancing is a must. You are going to be spinning it much harder. Because of this. The problems with the build will show up. Turbo/super charged/nitrous engines need extra attention when building them. Its very hard on the motors.
I have one of the G13 fly wheels too. Its going on the Starr car. I weighed it. It was 9.5 lbs. The G10 was about 13bs. With the bigger clutch it was still lighter than the G10. It will launch much harder with the lighter flywheel. But when you need the extra umph that the heavy flywheel gives. Like hard to climb hills. That is where it will suck.
Thats not quite as true anymore, even the factory turbo 3 was 8.3:1, there are several people on teamswift running 20+psi with 10:1+ compression, the real benefit is I can use LESS boost and get the same power figures as someone running high boost on very low compression, also another added benefit is the car will be powerfull off-boost when cruising, the car with low comp will be an absolute dog, because it is too dependent on the turbo. a downside is you cant use as much timing, i think it has to be reduced to like 0-8 BTDC.

Also kyle was blowing headgaskets due to running lean, the final time it blew up it spiked very lean and cracked his piston, having correct fueling is very important to the reliability of a turbo motor, I have been talking to "M3" on teamswift who has a "cheap turbo build" and its been running strong and reliably for around 4 years @ 5-7 psi (stock 9.5:1 comp) The way he accomplished his fueling was by way of a Hobbs pressure switch (mike has done this before too, so you know its good!) Here is some diagrams I made of the fueling incase you are interested!!!

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chads4dr


******************************************ANOTHER UPDATE WITH MORE PICS (56k BEWARE)************************************************

I finally had a local machine shop press the new pistons onto the old rods, it only took like an hour and it cost $48.00

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LOL, JUST FOR FUN!!!

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Apex Complete Gasket Set

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New Water Pump

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Rod, Main, Thrust Bearings

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Timing Belt/ Tensioner Kit

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Painted Block

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Head sitting on Block

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Intake Ports

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All ASSembled

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Just Some More Fun!!!

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bogs
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Duct tape heals all wounds

man that is PERFECT :drool
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Johnny Mullet
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Fear the Mullet

You do know that the Apex head gasket will need modified for the oil drain holes :deal

I had to modify Fred's on "The Weekend Rebuild" with a die grinder.

It's coming along quite nice! Keep up the good work man. The pictures are spectacular!
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chads4dr


Thanks everyone! Hey John, I had ordered a felpro headgasket too, because I want it to be covered in case I decide to boost later (I just ordered the Apex set because it has everything else and is cheap!), but guess what? The felpro has the incorrect drainback holes, but this apex gasket has been updated with larger holes (they even have a little metal collar around the larger ones)
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z34-5speed
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Formerly "Tech Certified"

Are those the pistons i sent you? Also, is that my old head? That setup looks great.

Kyle
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z34-5speed
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Formerly "Tech Certified"

Also i just noticed that the oil filter feed has been painted. You need to get that paint off of those threads and around the inside of the oil filter feed.
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chads4dr


z34-5speed
Jan 11 2010, 03:19 PM
Also i just noticed that the oil filter feed has been painted. You need to get that paint off of those threads and around the inside of the oil filter feed.
yeah will do, i didnt know if it would hurt or not, but yes those are your pistons and head :D
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chads4dr


******************** Small Update********************

Today I dropped off my crank to a machine shop to be polished and mic'd, it has some wear marks and pits (very liittle for having 390k miles) but it was enough concern to have it done right (COST $40), also after reading a thread on teamswift from "little blue car" I have decided to ceramic coat my pistons, it will make them more resisant to cracking when under boost, as they will reflect more heat off, all this involves is "spray painting" them with 2000*F header paint using 10 very light coats (this is the key) THEN you bake them in the oven (when the misses isn't home!!!) @ 350 for an hour, followed by a cooldown, and then cure them at 500*F for one to two hours, followed by a cooldown.

Also I have ordered my 365/222 cam, headbolts, and stainless valves from 3tech, those are the final items I need and then my rebuild will be ready to go....also on a side note I'm in the process of ordering Z34 5speed's turbo setup............. got boost? :D




EDIT: HERE ARE THE LINKS TO LITTLE BLUE CAR'S CERMANIC PISTONS.....
Ceramic coating pistons
1200 miles and DID NOT FLAKE OFF
Edited by chads4dr, Jan 22 2010, 05:17 PM.
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JohnDN


I didn't attend Geopolooza last year, but if you get this thing all put together by the next one I think I just might show up!

Oh, and thank you VERY much for those links on how to DIY ceramic coat pistons. I was gonna mill my head down eventually to increase the compression (for fuel economy), now I think I'll give ceramic coating the piston tops a try. I might even ceramic coat the combustion chamber too.
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chads4dr


Hope to see you there!!! Your welcome for the links!
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obaja
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Diesel Power

that little 3 banger is going to pull soooo good with z34's setup. I cant wait to see some videos.
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Johnny Mullet
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Fear the Mullet

And it's a 4 door Metro! The ultimate sleeper :evillol
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Murf 59
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Looks good Chad
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