Finally some SD4 progress. (Page 1/6)
Lilchief AUG 19, 01:51 AM
Finally got some work done on my sd4 3.3 . Had to get some epoxy removed and aluminum welded in. New valves, guides, springs ( 140 lb seat pressure, good for .700 lift ), 1.7 rockers, radius valve job, pressure tested and all surfaces straightened. Come January I'll start on the block, new rods and pistons ( 8.25 cr ).




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85 GT 3.4
14.9 @ 90 1.9 60' Old TH125/3.06
Unknown New 4T60/3.42

edfiero AUG 20, 07:23 PM
8.25 cr?? Why so low? Will you be adding a turbo? I have 10to1 in my SD4 and I wish I had gone higher. If I were getting new pistons I'd go to at least 10.75.
Lilchief AUG 20, 07:36 PM
Yes, turboing it. GT3076R , .82 A/R. Boost to 20 lbs. Target HP 450 @ 7200+.
fierosound AUG 21, 10:21 AM
It's so nice to see another SD4 build underway...

I just installed the multi-port injection I built using an Edelbrock 2-bbl intake.
Still tuning the fuel table – but the engine has never been happier.
(I have 11:1 CR - works out to about 10.5 at my elevation of 3500 feet)



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My World of Wheels Winners (Click on links below)

3.4L Supercharged 87 GT and Super Duty 4 Indy #163

[This message has been edited by fierosound (edited 08-22-2017).]

edfiero AUG 21, 06:30 PM
Fierosound looks too pretty to drive.

My SD is out of the car right now due to timing gear failure. Taking the opportunity to Jetcoat my header and reinsulate the firewall.
RWDPLZ AUG 21, 08:07 PM
New SD4 build? I'll grab the popcorn...
Lilchief SEP 18, 09:11 PM
Made some more progress. Took 4 months to get a cam made. I've had it now for 3 months. Specs are 238/243 dur @ .050, .650/.650 lift and 114 lca. My pistons and rods came in last week. Callie's 6" rods and Ross pistons yeilding 9.0 cr. Had to sink the Piston some just to get it that low. You can see the wrist pin is in the oil ring land. Had to have the head studs custom made. Arp doesn't make them any more. So far the cam was the most expensive with the head studs in second place. I've got some Piston and rod pics if someone wants to post them for me.
Toddster SEP 18, 10:37 PM
A 437 Casting, you're going old school! Looks very clean!
edfiero SEP 19, 08:36 AM

quote
Originally posted by Lilchief:
Had to have the head studs custom made. Arp doesn't make them any more.



These won't work ???

https://www.ebay.com/itm/GE...Priority!19343!US!-1
Lilchief SEP 19, 10:46 AM
Hmm. Too late now.