(G) Where's best to buy engine rebuild bits?

Gonna build a silly bike carbed 999cc engine for a laugh. Wheres the cheapest place to buy rebuild bits (gasket sets and the like?).

Is there a place similar to GSF for Fiats?

Matt

with no rev limiter you can take it round to 9000rpm that will be entertaining


what's wrong with a mk1 uno carb lukas

Try:

http://shop4parts.co.uk/

http://www.eurocarparts.com/

http://www.allpartsautomotive.co.uk/...e.asp?ID=14344

And don't forget that Fiat themselves can supply most parts, though check the prices first!

A Weber 32TLF will not flow enough air nor fuel for such high revs. It was never designed to do so. The mk1 twin choke Webers are better but you'll still be pushing it at 9000 rpm. Bike carbs are designed for higher revving engines, but it's all immaterial if the ports/ valves/ camshaft of the Fiat head aren't able to flow to match. In short the standard FIRE head will struggle to make increased power above 5000rpm without other modifications.

The engine will be a 1 litre bottom end. Fully balanced. Bit of weigh taken off the pistons and a load chopped off the flywheel. The head will be a mildly worked on Punto 1.2 16v unit which will bolt on, but just waiting for Oldschool to find out which cambelt i'll need. I'll make the exhaust and inlet manifolds myself to take bike carbs, then probably use megajolt ignition.

The brazilian 1.0 16v makes 70bhp. Aiming for a fair bit more than that so should be fun.

Cheers for the links.

Matt

i never said there would be any power or gain from revving to 9000

i'm just saying that's what they did

i had an uno 45s on single carb and it would rev to 9000 at that point valve bounce stopped it going any more but it never minded completely bullet proof engine

i have a punto 60s now and regularly give it death round to 7000 and it never complains

as for cam belts you will need the 16v cam belt and 16v and auto tensioner and 16v crank pulley will bolt straight on crank the tensioner will take up the minute difference in hight of the block from a 1242 to a 999

your biggest problem is going to be compression you may need to get some specks on that and remove/skim metal from head to correct it

Oldschool seems to think i'll run out of tensioner ajustment using the 16v cambelt.

I'm gonna skim the head/block to raise the compression a bit.

Matt

i'm sure those will have plenty adjustment were talking a few mill shorter block here

may need the old manual adjuster for 8v thou you'll see when it comes together or if that wont work you could contact a bearing suplier and have them make or of the shelf you a bearing that has the same inside diam as the 8v tensioner thingy and then any outside diam you want

but the cam belt you need is defo the 16v to work with the head then take the 16v crank sprocket and bolts and maybe pulley may be different tensioner is very easy to make your self with any bearing

The blocks about 8mm to 10mm shorter I believe, so 16 to 20mm shorter on the cam belt. I don't think you would get away with the 1242 belt



Nice spec Matt it'll be interesting.... cheers Damon

Can u not source more info on this brazilian 1.0 16v engine?

I am trying to but the info is not widely available.

Regearding skimming the block. I don't think you need to do this as the metal gasket is already very thin and the pistons need to be pocketed for this modification.

Whats the stock compression ration on the 999cc engine? I want it somewhere around 10:1.

Matt

From the Fiat Service Manual.... 9.8:1 +- 0.2

i would say no more than 10 to 1 as it will be on carbs it may start to pre ignight

more modern fiats are running 11 to 1

i never thought it would be so short compared i know the 1242 has a longer stroke

i doubt the 999 fire would have the same number of teeth nor pitch and such as the 16v belt but the 999 cam sprocket will not work on the head either but the 16v crank sprocket will fit the 999 crank so looks like you have to go that way anyway and work out some sort of tensioner as i say biger bearing should take some up

this may help

Engine Manufacturer Fiat
Engine Location Front
Engine Alignment Transverse
Engine Construction
Coolant Type Water
Engine Type SOHC
Number of Cylinders and Placement S-4
Valves per Cylinder 2 (toplam 8 adet)
Engine Displacement 999 cc (60.96 cu in)
Bore 70 mm (2.76 in)
Stroke 64.9 mm (2.56 in)
Bore / Stroke Ratio 1.08
Unitary Capacity 249.75 cc/cylinder (15.24 cu in/cylinder)
Number of Main Bearings 5
Compression Ratio
Fuel System Type
Aspiration Type Normal
Compressor Type -
Intercooler Type None
Catalytic Converter
Maximum Engine Power 46 HP (34.3 kW)
Maximum Engine Power rpm 5250 d/d
Maximum Engine Torque
Maximum Engine Torque rpm
Engine Torque at Max. Engine Power rpm 62.4 N.m (5250 d/d)
Power / Weight Ratio 59.7 HP/ton (44.5 W/kg)
Power / Engine Displacement Ratio 46 HP/litre (34.3 kW/litre)






Engine Manufacturer Fiat
Engine Location Front
Engine Alignment Transverse
Engine Construction
Coolant Type Water
Engine Type DOHC
Number of Cylinders and Placement S-4
Valves per Cylinder 4 (toplam 16 adet)
Engine Displacement 1242 cc (75.79 cu in)
Bore 70.8 mm (2.79 in)
Stroke 78.9 mm (3.11 in)
Bore / Stroke Ratio 0.9
Unitary Capacity 310.5 cc/cylinder (18.95 cu in/cylinder)
Number of Main Bearings
Compression Ratio 10.6 : 1
Fuel System Type SFi
Aspiration Type Normal
Compressor Type -
Intercooler Type None
Catalytic Converter Yes
Maximum Engine Power 80 HP (59.7 kW)
Maximum Engine Power rpm 5000 d/d
Maximum Engine Torque 114 N.m (84.1 lb.ft , 11.6 kg.m)
Maximum Engine Torque rpm 4000 d/d
Engine Torque at Max. Engine Power rpm 113.9 N.m (5000 d/d)
Power / Weight Ratio 87 HP/ton (64.8 W/kg)
Power / Engine Displacement Ratio 64.4 HP/litre (48 kW/litre)
CO2 Emissions
Fuel Consumption


which makes the 999 about 7mm shorter assuming the rods are the same height but i'm sure there not so will get back to you on that they are a different weight on eper

I read that the early FIRE engines (up to around 1987) had higher compression than the later models. Not sure how they did this (pistons or head differences ), but it was probably something to do with unleaded fuel coming in during the late 1980's and having to reduce the risk of pinking.

It'll have mappable electronic ignition so should be able to dial out any pinking by knocking the timing back a bit.

Matt