Latvian National Rally full-spec GC 16v conversion 2 liter unit complete.
Spec includes all the 'usual suspects' you'd expect from GCRE - nitrided GC spec steel billet cams, D16 HC forged pistons, GC/Cunningham race rods, alloy sump, steel flywheel, 3 stage dry sump.
GC
16v conversion Fiat 2 liter rally engine - updated 02 Oct 08
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16v conversion Fiat 2 liter rally engine - updated 02 Oct 08
- Attachments
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- Built short unit, minus sump fittings but otherwise near complete.
- OSC 16v 011.jpg (110.99 KiB) Viewed 35078 times
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- ex side view, dry-sump scavenge ports will go in the front lower sump section.
- OSC 16v 012.jpg (109.57 KiB) Viewed 35075 times
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- engine now with sump scav fittings in place
- OSC 16v built.jpg (431.61 KiB) Viewed 33713 times
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- Natasha bolting the slotted windage tray in place. The scav fittings have a removable gauze trap integral to the male-male union screwed into the sump
- OSC 16v alloy sump prep (4).jpg (440.44 KiB) Viewed 33705 times
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- Typical parts and service 16v conv.doc
- Word document intemising the full list of parts and services performed on this engine at GCRE
- (39.5 KiB) Downloaded 1975 times
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- OE 16v head gasket and GC D16 HC forged pistons
- OSC 16v 002.jpg (113.33 KiB) Viewed 33672 times
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- checking cam full lift using a long finger dti on the bucket, protractor is on the crank. You can nonly do this with belt fitted.
- OSC 16v 005.jpg (110.63 KiB) Viewed 33660 times
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- removing the dummy head bolts after offering-up the head, cams are steel billet profiles by Piper, beautifully made, with Vauxhall XE 16v tarmac rally profiles. Lift is so high all the bucket bores had to be deepened.
- OSC 16v 003.jpg (115.26 KiB) Viewed 33652 times
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- a certain amount of relieving work needed in the head to allow the big cam lobes to clear..
- OSC 16v cam relief.jpg (118.26 KiB) Viewed 33649 times
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- shimming up using ordinary capscrews to hold the cam caps in place
- OSC 16v dry-run shimming.jpg (117.36 KiB) Viewed 33644 times
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- inlet cam lift after shimming-up
- OSC 16v inlet full lift true.jpg (114.58 KiB) Viewed 33635 times
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- full-spec head with OE standard valve sizes on final confirmatory flow test (BPF)
- OSC 16v final bpf test.jpg (113.66 KiB) Viewed 33624 times
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- all the usual GC crank mods, mod oilways, tap & plug, polish, balance with OSC's own steel flywheel, dowel
- OSC 16v crank prep_01.jpg (118.72 KiB) Viewed 33619 times
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- OSC 16v inlet valve event closeup.jpg (116.82 KiB) Viewed 33610 times
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- here cheecking the valves don't clash, vital with narrow LCA, the inlets are fully assembled and the ex valve is free
- OSC valve-valve proximity check.jpg (111.35 KiB) Viewed 33607 times
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- Modelling clay in the VRs tells me the proximity vertically (in the plane of the valve stem) and radially with the head on when the engine is swung over two revolutions. Absolutely essential!
- OSC 16v dry-build (13).jpg (109.6 KiB) Viewed 33603 times
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- view of the worlds' finest race rods and pistons - Cunningham/CP
- OSC 16v pistons and rods in (4).jpg (113.69 KiB) Viewed 33591 times
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- OSC 16v dry sump bracket and pump dry-build (14).jpg (113.07 KiB) Viewed 33588 times
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- OSC 16v dry sump bracket and pump dry-build (13).jpg (114.61 KiB) Viewed 33577 times
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- aux d/s pulley is dowelled to centre-up pump drive pulley
- 16v aux ds pulley mods to dry sump (1).jpg (117.19 KiB) Viewed 33574 times
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- drive pulley machined to accept dowel
- dry sump bracket and pump dry-build (2).jpg (114.11 KiB) Viewed 33600 times
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- shaft machined to get perfect 1" belt alingment without chafing on flange of the steel aux d/s pulley. Plastic ones fit fine but these ones can need modification
- aux ds shortened 1.5mm.jpg (113.43 KiB) Viewed 33559 times
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- having shortened the aux d/s there is a risk of the back of the pulley rubbing on the seal, but not if you leave out the gasket and used a good grade of automotive RTV sealant instead
- shortened aux ds needs housing fitted without gasket to clear seal.jpg (112.33 KiB) Viewed 33572 times
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- Rear 4 (redundant) oilways blanked off (red box shows the two centre ones). The are not needed on the 16v conv, the head is fed from the front two only. No point risking a leak here..
- OSC 16v rear 4 oilways blanked off with M8 grubscrews and Loctite Hydraulic sealant.JPG (57.86 KiB) Viewed 33566 times
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- Typical parts and service 16v conv.doc
- Detailed engine spec in Word format
- (39.5 KiB) Downloaded 2022 times
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- Site Admin
- Posts: 5039
- Joined: June 18th, 2006, 9:31 am
- Location: Bedford, UK
- Contact:
Re: 16v conversion Fiat 2 liter rally engine - updated 02 Oct 08
Finished unit ready to ship with GC M16 inlet manifold modified to take Jenvey ITBs (individual throttle bodies), the manifold can be still be adapted for carbs if reqd for back-back test, hence retention of the original outer shape.
GC
GC
- Attachments
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- GC 001.jpg (114.59 KiB) Viewed 33184 times
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- GC 004.jpg (109.47 KiB) Viewed 33179 times
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