n/a 1380 advice
Turbo Mini Forums

Buildin a 1380 for a mate, 276 cam, stage 4 head

Wat wuld be the ideal c/r?

And wats the most that can be skimmed off the block?

Cheers eden

13.95 1/4 mile on a 2.95 fd. Carnt be that hard to beat!

276 cam a waste of time, I'd go for at least 10:5:1 compression if you can live with running on optimax.

Work out the volume of the head then work out how much needs to come off the block.

But personally i'd have the pistons flush with the deck.

Its guna be used alot around town hense only a 276,
And the block needs skimming as the pistons have been skimmed :-S

13.95 1/4 mile on a 2.95 fd. Carnt be that hard to beat!

Mine with a 285 was a piece of piss to drive round town, only a low comp 1275 with weber too.

My current 1380 with even bigger cam is a piece of piss to drive.

Honesty I fitted a 276 cam and removed if after 16 miles and fitted the 285!

Tb its for a mate whos skint so he carnt afford a cam (i donated the 276) so itle stay at that for now at least.
Its only guna have twin 1.25 su's on too.

Atm the pistons sit around 3mm down the bore :-S ive dun a c/r work out and it came out at 8.9 which seems too low for an n/a to me?

13.95 1/4 mile on a 2.95 fd. Carnt be that hard to beat!

Thats a hell of a long way down the bore.

Which pistons are they?

Chris

omegas that I think have been machined for some reason

13.95 1/4 mile on a 2.95 fd. Carnt be that hard to beat!

have you measured the thickness left on the crown? sounds like they have been butchered..

Speeding is like masturbating, everyone does it, but not all of us film it and put it on the internet

[quote=fab,8th Oct, 2010]fuck off

You could skim the block and use 998 push rods if the rocker angle is all to cock. Not sure how much shorter they are though.

You need to get the CR up, preferably by skimming the block. 3mm is shitloads.

In the 13's at last!.. Just

Is a 3mm skim possible? /Safe

13.95 1/4 mile on a 2.95 fd. Carnt be that hard to beat!

its 118 thou to come off the block to get down to the piston's that is a lot! id try get hold of another set of pistons

276 is a nice cam for a daily driver

I was disappointed with the 276 personally.

If something is worth doing, it's worth doing half of.

Before this thread ive only ever heard gd things about the 276

13.95 1/4 mile on a 2.95 fd. Carnt be that hard to beat!

a camshaft is a personal choice.

Absolutely nothing wrong with the 276 if your not looking for big HP numbers.

I ran the 274 injection cam with 1.5 rockers on the 1400 which gave 100lbft at 5600. Gave 80lbft from about 3500 to7000rpm.

3mm off the block in reallity is fuck all, but you will strart to run into problems with pushrod lengths dependant on how much the head has been skimmed.

Are you 100% sure that the pistons have been machined down? Could it be an offset ground short stroke crank of 78mm?

Just don't let the CR fall below 10:1

You'll need new rings anyway, so instead, I'd get some new pistons....

Il get some pics up, the rings are new so there okay

13.95 1/4 mile on a 2.95 fd. Carnt be that hard to beat!

Culd the pistons be short height?

There omega 1003/11. 73.5 s

13.95 1/4 mile on a 2.95 fd. Carnt be that hard to beat!

If something is worth doing, it's worth doing half of.

that wasn't necessarily the cam at fault though...

short hieght pistons are about 1.8mm shorter than a standard height piston, which normally sit ~1mm down the bore, therefore, short height pistons could indeed sit ~2.8mm down the bore on a standard block.