331ci 86GT - Just for fun. (Page 5/8)
La fiera MAY 12, 07:44 PM

quote
Originally posted by fishsticks:
I am just razzing you.

I don't bother with flat tappet anything anymore, since roller ramp designs are so much better. The triple spring thing was for the old guys jumping coke cans in the back.

And I figured it was some sort of plenum on your car.

Where I come from, if we talk smack to you it means we like you.



Your coments didn't bother me at all mate. Looking forward to see your car running soon!
La fiera MAY 12, 07:47 PM

quote
Originally posted by fishsticks:
I am just razzing you.

I don't bother with flat tappet anything anymore, since roller ramp designs are so much better. The triple spring thing was for the old guys jumping coke cans in the back.

And I figured it was some sort of plenum on your car.

Where I come from, if we talk smack to you it means we like you.



Your coments didn't bother me at all mate. Looking forward to see your car running soon!
Raydar MAY 14, 11:15 PM
Sent you a PM, if you've got a minute or two...
fishsticks MAY 18, 03:16 PM
Still waiting on the shortblock to ship out. But parts are starting to arrive.



Because the previous owner ran self aligning rocker with guide plates, the valves were put into a bit of a bind situation. This resulted in the guides being worn a bit funny on each intake valve. I noticed this when I first put the motor back together and just crossed my fingers it wouldn't use oil... buuuut it did. Rather than send these off to machine, I bought new castings. $225 each on Amazon. I'll port the new ones very lightly (mostly just casting flash cleanup). Also bought some light, undercut valves.


I really weighed overcamming the car to soften low speed torque but ultimately decided against it. Since I have a 2D timing table available I'm going to attempt to use that to manage torque in the same vein as traction control on newer vehicles. I also have launch control available on the Sniper and may see what I can make happen with that. This guy should put power peak in the 6000 range. I will run it with the 1.6 aluminum roller rockers I currently have.



Having this in my hands now, I got the measurements I really wanted off of it, and it will clear the passenger side axle. Awesome! 7qts (+ .5-1 for the remote oil filter) will work nicely with the high volume oil pump I got.

I guess I should go put the new heads together or something. Maybe drop the old motor out of the car...
fishsticks MAY 21, 10:55 PM
Today was a nice day. I should be driving this.



But I'm not - Because my shortblock hasn't shipped yet.


So I finished prepping and putting together a cylinder head instead.



Parts are piling up. Ready to get moving on this thing.

I do have a surprise being delivered on Monday at least...
La fiera MAY 26, 04:30 PM

quote
Originally posted by fishsticks:

Still waiting on the shortblock to ship out. But parts are starting to arrive.



Because the previous owner ran self aligning rocker with guide plates, the valves were put into a bit of a bind situation. This resulted in the guides being worn a bit funny on each intake valve. I noticed this when I first put the motor back together and just crossed my fingers it wouldn't use oil... buuuut it did. Rather than send these off to machine, I bought new castings. $225 each on Amazon. I'll port the new ones very lightly (mostly just casting flash cleanup). Also bought some light, undercut valves.


I really weighed overcamming the car to soften low speed torque but ultimately decided against it. Since I have a 2D timing table available I'm going to attempt to use that to manage torque in the same vein as traction control on newer vehicles. I also have launch control available on the Sniper and may see what I can make happen with that. This guy should put power peak in the 6000 range. I will run it with the 1.6 aluminum roller rockers I currently have.



Hey Fish, what is the part number of the black spring seats on the heads?

Thanks

Rei

Having this in my hands now, I got the measurements I really wanted off of it, and it will clear the passenger side axle. Awesome! 7qts (+ .5-1 for the remote oil filter) will work nicely with the high volume oil pump I got.

I guess I should go put the new heads together or something. Maybe drop the old motor out of the car...
fishsticks MAY 27, 05:46 PM

quote
Originally posted by La fiera:
Hey Fish, what is the part number of the black spring seats on the heads?

Thanks

Rei



Lunati 86705-16

Comp 4705-16 will also work.

OD 1.300
ID .570
Spring ID .875
.060 thickness
Jeg's emailed today to let me know the short block (that was supposed to ship on 5/17) is backordered until July 15th.

I'll admit I started looking at Dart blocks right after... but trying not to let mission creep set in.
La fiera MAY 27, 11:09 PM
Thanks! I got the Comp Cams!
fishsticks JUN 06, 01:59 PM
Updates. I have them.

Waiting until Mid July to get a short block here wasn't working for me. So I cancelled the order.

Traded some turbo parts to a buddy and for this instead:





This is a .030 over rebuilt L31 block for over 8500 GVRW trucks.

The good:

  • Spheroidal graphite iron block
  • Forged crank
  • Powdered metal rods
  • 4 bolt mains


The bad:

  • Rebuilder pistons




Normal compression height for SBC pistons is 1.560". Most rebuilders use 1.540 pistons in stock rebuilds, so that there is room to deck the block if needed.

This block was not decked, which puts those pistons .045 in the hole (confirmed by measuring). I could eek out 9:1 compression with a 64cc head and a .015 gasket. Not great for NA.

There's no evidence the shop rebalanced the crank, and of course they just tossed these pistons in without matching anything. So a 1.560 compression height flat tops should work fine with the crank bob weight. Those will be here Monday with a 6cc relief and moly rings. Should make 10.2:1 compression with my heads. Easy peasy on pump gas.

Settled on the Lunati Voodoo 282 cam. 231/239 @ .050, .571/.587 lift on a 1.6 rocker.



I have a good set of head flow data and a pretty simple exhaust. So we should be in the ballpark on these numbers.

Anyway, this train is moving again finally! Also finished installing a Maxjax because I'm in my 40s and tired of working on my back. Hoping to build some momentum on this project quickly.

[This message has been edited by fishsticks (edited 06-14-2021).]

Will JUN 07, 10:07 AM

quote
Originally posted by fishsticks:

The good:

  • Spheroidal graphite iron block
  • Forged crank
  • Powdered metal rods
  • 4 bolt mains






Don't forget:

  • Roller Cam!


Although Rei may disagree with me on that one