Z18XE on Throttle bodies 200bhp pg 33 any one for head? - Corsa Sport - for Vauxhall and Opel Corsa B, Corsa C and Corsa D

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Warren G

Member

Registered: 14th May 06
Location: Kent
User status: Offline

7th May 08 at 21:38

no lol

if it was to do it again, it would be go tech

richc

Member

Registered: 24th Mar 07
Location: Ilkeston
User status: Offline

7th May 08 at 21:40

Hope long do you keep it on the limiter

ainsley_brader

Member

Registered: 24th Mar 02
Location: Tattershall, Lincolnshire
User status: Offline

7th May 08 at 21:50

cost of megasquirt cost of gotech?

ffls

Member

Registered: 29th May 02
User status: Offline

7th May 08 at 22:34

quote:
Originally posted by Vaux Lad

quote:
Originally posted by ffls
You need new valve springs if they are old and make some piston pockets at least +1,5mm deep.

You are using Dbilas 262 deg cam with 10 mm of valve lift instead of 241/242 original ones with 8,45mm of lift.

I wouldn't fit Kent SBD one however. They break my OEM tensioner and almost 16 valves where bent. Better use Dbilas valve springs.

No you dont, his cams clear on the standard pistons......
People have run NEwmann 288 deg cams with around 10.6mm lift on the standard valve train without problems

Good stuff Warren, nice to the see the MS came good in the end.
Shame it didn't last too long
Is power starting to fall away at the limiter or still rising? Cant see the rr graph pic on my pc for some reason

[Edited on 07-05-2008 by Vaux Lad]

That is because they don't like to rev hard

I destroyed 1 standard piston at 7200 rpm chasing a friend for some time.
The standard springs were old and had lost tension so even with standard cams you can wreck an entire head

So you increase valve lift another 2mm and nothing bad happens?

Good luck

broster

Premium Member

Registered: 6th Dec 02
Location: Drives: E39
User status: Offline

8th May 08 at 06:02

quote:
Originally posted by ffls

That is because they don't like to rev hard
I destroyed 1 standard piston at 7200 rpm chasing a friend for some time.
The standard springs were old and had lost tension so even with standard cams you can wreck an entire head

So you increase valve lift another 2mm and nothing bad happens?

Good luck

what do you mean not liking to rev hard?

i ran newman 288 cams on standard rods/pistons/valves/springs/everything really other than arp rod bolts and pockets in the std pistons.

reving to 8500 was no problem on a daily basis producing 192bhp on gotech.

the only time we had an issue with the engine was with a tacho recall of 9200rpms (cole trickle) beating a subaru and passing 8 or 9 cossies round donnington, then we had valve problems as a piston detached itself from the conrod.......

Member

Registered: 20th May 02
Location: Kent
User status: Offline

8th May 08 at 08:33

at cole trickle

Vaux Lad

Member

Registered: 15th Dec 04
Location: Stoke-on-Trent
User status: Offline

8th May 08 at 18:04

quote:
Originally posted by ffls

quote:
Originally posted by Vaux Lad

quote:
Originally posted by ffls
You need new valve springs if they are old and make some piston pockets at least +1,5mm deep.

You are using Dbilas 262 deg cam with 10 mm of valve lift instead of 241/242 original ones with 8,45mm of lift.

I wouldn't fit Kent SBD one however. They break my OEM tensioner and almost 16 valves where bent. Better use Dbilas valve springs.

No you dont, his cams clear on the standard pistons......
People have run NEwmann 288 deg cams with around 10.6mm lift on the standard valve train without problems

Good stuff Warren, nice to the see the MS came good in the end.
Shame it didn't last too long
Is power starting to fall away at the limiter or still rising? Cant see the rr graph pic on my pc for some reason

[Edited on 07-05-2008 by Vaux Lad]

That is because they don't like to rev hard
I destroyed 1 standard piston at 7200 rpm chasing a friend for some time.
The standard springs were old and had lost tension so even with standard cams you can wreck an entire head

So you increase valve lift another 2mm and nothing bad happens?

Good luck

You were unlucky then.
The standard bottom engine(bar ARP rod bolts and steel cambelt rollers) can rev SAFELY to 7750rpm without any issues at all.

gavin18787

Premium Member

Registered: 22nd Feb 05
Location: Basildon, Essex
User status: Offline

8th May 08 at 18:47

quote:
Originally posted by warren.g

much difference, picks up, has torque

added so much more mid range. 20bhp at 4000rpm

and it can now rev

well did

Ride needed

Plus I havent experianced your driving yet

I am thinking of getting something with tb's and french next I think

Drives supercharged Tec with torque

broster

Premium Member

Registered: 6th Dec 02
Location: Drives: E39
User status: Offline

8th May 08 at 18:57

quote:
Originally posted by jr
at cole trickle

i was hoping someone would pick up on this hahaha

Member

Registered: 20th May 02
Location: Kent
User status: Offline

8th May 08 at 19:30

"starts to consider days of thunder tribute thread"

Warren G

Member

Registered: 14th May 06
Location: Kent
User status: Offline

8th May 08 at 21:13

quote:
Originally posted by jr
"starts to consider days of thunder tribute thread"

before my time, i think

should have cylinder head back tomorrow, 8 new exhasut guides

ainsley_brader

Member

Registered: 24th Mar 02
Location: Tattershall, Lincolnshire
User status: Offline

8th May 08 at 22:14

quote:
Originally posted by warren.g

quote:
Originally posted by jr
"starts to consider days of thunder tribute thread"

before my time, i think

should have cylinder head back tomorrow, 8 new exhasut guides

days of thunder was a film with tom cruise racing a stockcar

ffls

Member

Registered: 29th May 02
User status: Offline

9th May 08 at 13:08

quote:
Originally posted by Vaux Lad

quote:
Originally posted by ffls

quote:
Originally posted by Vaux Lad

quote:
Originally posted by ffls
You need new valve springs if they are old and make some piston pockets at least +1,5mm deep.

You are using Dbilas 262 deg cam with 10 mm of valve lift instead of 241/242 original ones with 8,45mm of lift.

I wouldn't fit Kent SBD one however. They break my OEM tensioner and almost 16 valves where bent. Better use Dbilas valve springs.

No you dont, his cams clear on the standard pistons......
People have run NEwmann 288 deg cams with around 10.6mm lift on the standard valve train without problems

Good stuff Warren, nice to the see the MS came good in the end.
Shame it didn't last too long
Is power starting to fall away at the limiter or still rising? Cant see the rr graph pic on my pc for some reason

[Edited on 07-05-2008 by Vaux Lad]

That is because they don't like to rev hard
I destroyed 1 standard piston at 7200 rpm chasing a friend for some time.
The standard springs were old and had lost tension so even with standard cams you can wreck an entire head

So you increase valve lift another 2mm and nothing bad happens?

Good luck

You were unlucky then.

The standard bottom engine(bar ARP rod bolts and steel cambelt rollers) can rev SAFELY to 7750rpm without any issues at all.

OLD VALVE SPRIMGS LOOSE TENSION

Due to valve flutuation the valve hit the piston and that's it

Now I use Kent upper retainers, new valve springs and pocketed pistons.
Best to be on the safe side of things

Warren G

Member

Registered: 14th May 06
Location: Kent
User status: Offline

9th May 08 at 18:17

just got the cylinder head back tonight

new exhasut guides fitted

but his skimmed it (again) going to be very high compression!!!!

Member

Registered: 20th May 02
Location: Kent
User status: Offline

9th May 08 at 21:52

get it back down with a custom head gasket then mate from the likes of farriday etc ?

Warren G

Member

Registered: 14th May 06
Location: Kent
User status: Offline

9th May 08 at 22:16

na, just put another GM head gasket on

Member

Registered: 20th May 02
Location: Kent
User status: Offline

9th May 08 at 22:17

ok ok..................

Warren G

Member

Registered: 14th May 06
Location: Kent
User status: Offline

9th May 08 at 22:21

whats the worse than can happen?

way i see it

higher compression = more power

Vaux Lad

Member

Registered: 15th Dec 04
Location: Stoke-on-Trent
User status: Offline

10th May 08 at 11:59

Pushes cr too high=detting

=bye bye engine

broster

Premium Member

Registered: 6th Dec 02
Location: Drives: E39
User status: Offline

10th May 08 at 12:42

doubt he would have taken that much off it, would just a faced to freshen it up

Vaux Lad

Member

Registered: 15th Dec 04
Location: Stoke-on-Trent
User status: Offline

10th May 08 at 12:45

Thats what i was assuming, but if hes just taken the smallest amount off, it should be 'reet.

Warren G

Member

Registered: 14th May 06
Location: Kent
User status: Offline

11th May 08 at 09:00

one way to fond out!!

Olsrey

Member

Registered: 13th Jan 07
Location: Bradford Drives: LET Vectra B
User status: Offline

11th May 08 at 09:20

Too much compression looses power.

Dave A

USER UNDER INVESTIGATION - DO NOT TRADE

Registered: 10th Dec 03
Location: County Durham
User status: Offline

11th May 08 at 09:52

sying more compression makes power isnt strictly true, the required engine compressin ratio depends massively on spec and RPM that it will be using.

Linch

Member

Registered: 4th May 06
Location: Whickham, Tyne and Wear
User status: Offline

11th May 08 at 09:54

quote:
Originally posted by Dave A
sying more compression makes power isnt strictly true, the required engine compressin ratio depends massively on spec and RPM that it will be using.

Blah blah....blah blah

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