mini valver

As topic says

A 5e with big pistons ummmmm

Not trying to achieve much was just a thought I had

If you were to use 75.5mm pistons??

And you rate these Phil Eh. The heat range 7 ngk no good?? It was pushing 1.93 bar had no issue but the boost was tailing off so Av ordered a stronger wastegate spring see if that was the issue just a friend said he was surprised I had no issue that was the reason for the question thanks for reply lads

Say you had iridium plugs and some good 8mm ht leads I heard a tale today there is a limit on the boost it can cope with

Like I say my mate had a corsa with some in running good power engine has done over 20k miles now

Just seen them don't no much about them I no a Lad that had a 560bhp cords turbo that ran these with no issues at all but that's a Vauxhall this is a Toyota people's opinions would be appreciated cheers

Cheers lads. The holset I have is a hybrid kind of thing and it's boosting 1.3 bar at the mo at about 4k so it's very good for spool. Need the extra revs just so I can push it but like I say I am in the process of building a head just won't be ready for when I need it so I.e wanting to rev my old head a little bit.

My engine is tuned but the only thing left to do is the head. What is stock Max rpm I always thought it was 7800

Just strange they do rev that much if they can not take it cheers for the info tho

I am only doing it for a while the head was rebuilt when it was forged about 4k mikes ago

Everything but the head race tech custom 1l larger inlet fully forged lightened and balanced 4efte. Godzilla exhaust Mani holset turbo. Everything but the head am on with doing 1now. I thought stock rpm was 7800 Adam b said should be safe to go to 8200 8300 as some of them piggy back ecu red to about that.

Wanting to raise my rpm for a little while till I get my head built will the stock cams and valve springs handle 8300

As stated after the above preferably in blue