2 Litre Pinto Tuning ?

[Bonzo]

Cheers bob

I spoke to our local engine builder yesterday, dad wasn't there but the lads said more or less the same.

They are quite happy to do the oversize re-bore but asked if I could supply the pistons as the last time they done a 2.1 conversion, they had trouble obtaining them.
Should probably explain, they are a very small company but have been going ever since I was a teenager.
As usual & like me, being in the ass end of nowhere I guess they are limited to a small handful of suppliers.

The TOTO pistons ( 2.25mm oversize ) Are £120 for the set inclusive of rings & gudgeon pins.

The AE pistons are £220 per set, again inclusive of rings & pins.

the price difference of £100 is almost enough to pay for the re-bore cost ( I incorrectly stated £80 earlier )

[baz-r]

what about wossner pistons? i think thay do hi comp pistons 2mm oversize
no idea of price

[Bonzo]

Yes Woosner pistons are available Baz

Priced at £560 per set, bit out of my league for this particular job.

If I were to go for top notch pistons then it would be silly not to go for steel rods, that'll push the bill up to £900

Add the machining costs & other sundry items I could see that back of almost £1500 just for the block,

Almost double the cost of buying a new a new 2 litre Zetec engine.

All of that said, I know this job is going to cost a fair bit, probably not far off the cost of a new Zetec engine.

Wish I had the energy to sling something a bit more exotic in Juniors Sierra.
Can manage the bench work fine & supervise the Two lads during the engine swap but that's about it

[robo]

Found this a while ago Ronnie.

http://www.pumaracing.co.uk/PINTO.htm

Bob

edit. and some carbs on pistonheads http://www.pistonheads.com/sales/3359083.htm

[snapper]

There are some simple tricks to get more from a Pinto
Fr32 or 33
Thinner Felpro head gasket
Bike carbs
Megajolt
Should get you 130bhp

The injection head, the one with the egg shaped inlet ports is worth 5 to 10 bhp
The Felpro gasket will give 9.7 to 1.
10.5 to 1 max for cast pistons
Rev limit for the rods 7200 and that should limit your cam choice.
Megajolt releases the power that a standard dizzy will strangle
Megajolt will give you easier starting, better idle, more power and better fuel economy.
It's not hard to fit and set up.

[Bonzo]

Bob

Many thanks for that link, some very interesting reading there.

Snapper

Many thanks for that run down

That list is more or less where I want to end up with the job in hand.

Block is currently at the engineers having a re-bore to 93mm & the crank re-ground.
Leaving the re-assembly of the block to them as they will warrant that part of the build.

I was talking about camshaft choice with my eldest son last night, I favour the Kent FR32 & the eldest thinks the Kent FR33 will be a better option ?

I don't know if anyone has an opinion to share

From Burton power

Kent FR32 - Fast Road. Power band 2500-7000rpm. Valve lift 11.2mm (inlet) 10.9mm (exhaust). 285 deg (inlet) 280 deg (exhaust) duration. Carb only.

Kent FR33 - Fast Road/Rally. Power band 3000-7500rpm. Valve lift 11.7mm (inlet) 11.3mm (exhaust). 300 deg (inlet) 297 deg (exhaust) duration. Carb only.

[baz-r]

fr32 will be more driveable
dont go to wild for road use it will make it undrivable in traffic and come mot time your hc's (unburnt fuel) will be sky high and idle will be poor
not to mention econimy

cams just alow an engine to make more power at diffrent bands of revs so a cam with a higher rev rating will have poorer power in the lower revs
its always easyer to make more power gains at higher rpms much harder at lower ones
think of it as robbing peter to pay paul

[robo]

Lots of free horsepower to be had which is the way I go every time, good balance job +5/10%,underdive pulleys + 5/11 hp, freeflow exhaust +5/10 hp, mild gas flow and 3 angle valve job, block decking,head cc matching, port matching and there is even a few free horsepower to be had out of a waterpump. Ditto on the cam sometimes less is more. All of the other stuff mentioned here is also adding efficiency which has to be a good thing and only really costs a bit of time.

bob

[Bonzo]

Originally Posted by robo

Lots of free horsepower to be had which is the way I go every time, good balance job +5/10%,underdive pulleys + 5/11 hp, freeflow exhaust +5/10 hp, mild gas flow and 3 angle valve job, block decking,head cc matching, port matching and there is even a few free horsepower to be had out of a waterpump. Ditto on the cam sometimes less is more. All of the other stuff mentioned here is also adding efficiency which has to be a good thing and only really costs a bit of time.

bob

Funny you should say all of that Bob !

I collected the re-built block on Monday & had a good old natter with the engine builder & that is more or less, a word for word account of his advice to me.

He's a bit old school like me, been in his current unit since 1980

Turns out he is building a Robin Hood 2B ( Like me, very slowly ) & using a 2.1 Pinto in that.
Gave me a grand tour of his handywork & a fair few pointers too

Cost so far ..... Ouch baby, very ouch