56 replies to this topic

[speedster]

Interesting That manifold looks sweet too! What turbo is in the VXR? I'd like to get a hold of it's map.

[slindborg]

no idea.

there is also a thread on vauxsport for reading compressor maps
http://www.vauxhalls...turbos-t92.html

a fair wealth of info on there for forced induction (mainly the turbo route)

[siztenboots]

why don't we get threads like this anymore ?

[slindborg]

why don't we get threads like this anymore ?

becuase its not trendy...

[vocky]

why don't we get threads like this anymore ?

because they get posted on www.z22se.co.uk instead

I'm currently building a 11:1 CR bottom end with wiseco special order pistons and also building up a saab head with gm racing components.

I'm aiming for a reliable 7600 rpm top end, rather than my current 7000rpm, so hopefully another jump in power.

[slindborg]

why don't we get threads like this anymore ?

because they get posted on www.z22se.co.uk instead

I'm currently building a 11:1 CR bottom end with wiseco special order pistons and also building up a saab head with gm racing components.

I'm aiming for a reliable 7600 rpm top end, rather than my current 7000rpm, so hopefully another jump in power.

shame the forum layout is a chore to actually use now plus all the astra/veccy owners dont like brutal honesty lol. Still a good source of talking points though.


sounds like a fun build , why not destroke the tart and go for 8K+

[NickB787]

why don't we get threads like this anymore ?

because they get posted on www.z22se.co.uk instead

I'm currently building a 11:1 CR bottom end with wiseco special order pistons and also building up a saab head with gm racing components.

I'm aiming for a reliable 7600 rpm top end, rather than my current 7000rpm, so hopefully another jump in power.

and he is going to give it to me

go no

[MaDFreeBiRD]

My LY used to change at around 7000+ rpm (dont know exaclty how much as it used to go all the way off the clock) and would still pull to the limiter which was pretty high.

[speedster]

Use these wisely and you can get to any RPM.

CLICKY

[siztenboots]

so for the z20let with its 86 mm bore and stroke and 9.5:1 compression, where is the limit , crank or rods ?

[VIX]

My LY used to change at around 7000+ rpm

And then what happened ....

[MaDFreeBiRD]

My LY used to change at around 7000+ rpm

And then what happened ....

i did think when i posted that i would get a similar response fair play

I didnt do any of the tuning on that car, and it was booked into plans for a good going over too!

[VIX]

My LY used to change at around 7000+ rpm

And then what happened ....

i did think when i posted that i would get a similar response fair play

[slindborg]

so for the z20let with its 86 mm bore and stroke and 9.5:1 compression, where is the limit , crank or rods ?

Rods will suffer first then the crank. No one knows the exact limit of the crank (bar 8K being a sensible rev limit for a std one).


Tons and Tons of LET related tuning info (in terms of the parts etc) on vauxsport.

[petrolhead1]

I am surprised static, dynamic balancing and blueprinting gets so little mention in this thread. If this is a given then I will sound like a someone giving lessons in egg sucking to their elders and betters so please accept sincere apologies for that. I don't think I need to explain what this is about to you guys but it must be crucial to reliable max revs and power.

[manus]

I plan to build from the oil pan up! I've a budget of around 12k for the the engine build. I will bring the engine up to it's safe max RPM and be content with that, main focus is torque and power. Going with GM Billet crank plus their Ecotec Racing Piston & Pin Set (Part # 889586350) or similar gives you an engine with 2.0 liters of displacement with 10.5:1 compression so I should be able to move beyond 8000 RPM safely. Again, I'm looking for power + long term reliability. The dry sump concept is interesting.........

Did you have a look at this site?

http://www.vmax.de/h...rame-haupt.html

Pick your choice 360 400 450 550 bhp...

[slindborg]

I am surprised static, dynamic balancing and blueprinting gets so little mention in this thread. If this is a given then I will sound like a someone giving lessons in egg sucking to their elders and betters so please accept sincere apologies for that.

I don't think I need to explain what this is about to you guys but it must be crucial to reliable max revs and power.

unfortunately as has been mentioned... the Z22SE lump is a stupid long stroke monster so wont lend itself to revving well, even with a perfect balance setup/blue printing.