Figured I'd post my ongoing build here... will update later with some pictures and some initial specs. Cases are due back from machine work in about a week, about 1/2 of the major mechanicals are in hand, rest on order as of today.
I'd posted a few months back on ideas, and have settled on a, probably mostly non-traditional approach to the engine build on my 71T. No carbs or MFI here. And most of the rotational assemblies will be from modern car designs. I purchased a core 77 7R in very nice condition, will use many of the take offs to refresh the 77 7R with carbs currently in the car for a future project... !?!?
Very much appreciate all the knowledge here to gain ideas as I worked with the builder I'm using.
General philosophy: 7R mag case, street focused, happy at sea level to 7k ft, modern/light/low friction rotational assemblies, modern engine controls to deal with how and where I drive the car. Basically, classic engine, keep many of the classic looks, but, modern 'insides'. I want it fun around town, in the hills, with good power, and, no carb annoyances as I'll drive it from sea level to the top of Angeles Crest and I want it consistent, always.
My car is essentially a sleeper, innocent looking 71T with a full refresh and updated sportier chassis setup. No flares, she's skinny and staying that way. May squeeze a 7R with a 215 out back. 911/01 trans is fresh with various upgrades already done, will be installing an LSD.
Here's the basic build spec:
Case - 1977 7R - clean core with all the tricks done by Ollies, opened up to support 2.8L
996 Turbo oil pump
Custom crank - allows use of GT3 TI rods w/ modern bearings
GT3 Titanium rods
Custom CP pistons 2.8L. Custom light design will be based on newer pistons spec
Custom / modern type rings and ring design on piston
Custom light pin / coated
Compression measured to 10.5:1
Nickies cylinders - with custom boss to attach 993 type knock sensors (1 per bank)
Heads fully re-worked by xtreme. All the tricks, dual plug, TI bits, porting etc.
Billet DLC rockers
Something around the DC60 cam profile (this we may tweak...). But my desire is decent drivability, don't want it super peaky, Power from 4.5k+ and rev to ... 8k-ish.
GT3 intermediate gear
Rasant induction, throttle bodies, high rise ITB intake
Motec M1 with dual lambda O2/knock, and all the sensors necessary for modern engine management
Rasant custom wiring harness for all sensors
Fiberglass tins
All cosmetics done done - builder going to surprise me :-)
....and some tears as I write the checks and question my judgement for spending this $ on a mag case engine...
The orange one, not the italian!
