7AGTE Levin GTZ - Runs a 10.88@209.57 29/04/07

[old schooler]

YOO!! 330kW on standard cams??? thats bloody awsome.

have a hunt around for some aftermarket cams, mainly coz its force induction i dont think that cams with higher lift will do much for you, so just go for more duration. (someone correct me) standard Blacktop cams are 256 duration (advertised) with 8mm lift? might be silvertop specs

either way, going longer duration holds valves open longer and keeping the lift the same keeps air speed up so torque at slow speeds isnt lost...too much (when compairing it with more lift)

dont go too massive with cams too as you will loose bottom end torque and dump it higher up in the revs. may be fun on a dyno and flat out racing (on a race track, of course) but no fun for round town, or even taking off from rest. thats worst case tho, aftermarket cams are pritty cool in saying what they do and where power band is.
ALSO! dont scrimp and put cheap sh*ty valvesprings in it or you will be back where you are now! oh and get new shims as well.
Usually this all comes with the kit. kelford do cams, shims, springs ect for around $1200ish (?) then you got to get someone to fit them, so you got to take the head off. (port match time maybe??)

NO standing on what you have done intended, you have done remarkably well to get that much grunt out of 1800cc on standard cams....well done.
hope this again helps

[Bazda]

YOO!! 330kW on standard cams??? thats bloody awsome.

have a hunt around for some aftermarket cams, mainly coz its force induction i dont think that cams with higher lift will do much for you, so just go for more duration. (someone correct me) standard Blacktop cams are 256 duration (advertised) with 8mm lift? might be silvertop specs

either way, going longer duration holds valves open longer and keeping the lift the same keeps air speed up so torque at slow speeds isnt lost...too much (when compairing it with more lift)

dont go too massive with cams too as you will loose bottom end torque and dump it higher up in the revs. may be fun on a dyno and flat out racing (on a race track, of course) but no fun for round town, or even taking off from rest. thats worst case tho, aftermarket cams are pritty cool in saying what they do and where power band is.
ALSO! dont scrimp and put cheap sh*ty valvesprings in it or you will be back where you are now! oh and get new shims as well.
Usually this all comes with the kit. kelford do cams, shims, springs ect for around $1200ish (?) then you got to get someone to fit them, so you got to take the head off. (port match time maybe??)

NO standing on what you have done intended, you have done remarkably well to get that much grunt out of 1800cc on standard cams....well done.
hope this again helps

WTF
why are we talking about changing my cams Who said I wanted to change my cams???????????????????????
When I built this engine i considered cams but didnt need them, and why would i wana get someone to take my head off and why would i wana get someone to assemble my head???

Things now are breaking on my car cos it has too much power, why would i wana get bigger cams and make more power when I cant even use the power I got now?

[old schooler]

sorry, so you are not greedy and want more.

if its valvesprings the head has to come off.

simple.

and if you dont want that power, wind ya boost back to 10psi. it will last longer without breaking....but you are adicted to it and will always want 25+psi/330kW. so are you going to live with less but reliable grunt or more ruthless, big dollars to maintain, beast?

[matt dunn]

Maybe it might be worth pulling the tappet cover off and check the valve clearances?

I have had issues with my 20V head ( silvertop though as you know)
throwing out the shims from under the buckets.
Has happened twice now on two different ocasions.
I know why mine did it but would suspect yours will be a different reason but may be the same symptoms.

Matt

[Bazda]

sorry, so you are not greedy and want more.

if its valvesprings the head has to come off.

simple.

and if you dont want that power, wind ya boost back to 10psi. it will last longer without breaking....but you are adicted to it and will always want 25+psi/330kW. so are you going to live with less but reliable grunt or more ruthless, big dollars to maintain, beast?

Im more than happy with my power, its way more than I expected.
Crank on the 7A aint a very strong item, I woudlnt want anymore power/I have too much power for the crank as it is.
Taking the head off is no big deal for me, its a simple as job.
Cams will just make my car less reliable due to more power.
Its a street car that i drive to uni, go shopping in everyday.
I dont wana loose VVT
If its the valve springs i'll change them to aftermarket ones, if its the valves i'll change them also.
I dont have the budget for cams and re tuning of the car.
The car was only running for 2 days after it made 330kws

Think I have explained my reasons why I dont need cams.

And Im not greedy I was raised welll.

[Bling]

Yeah but thats with Al in it

lol!!

hope its not too serious to sort out (back on topic )

[Bazda]

well today started pulling my car apart. The crank pulley that drives the PS etc had broken where the key goes through it, then the key fell out resulting in the timing of the engine changing, I was lucky the timing didnt change when it was boosting and only when i was cruising, and the valves only started hitting after i stopped the car then re started it.
Anyway took the head off and the exhaust valves had only just nicked the pistons but i'll do a leak test on the ex valves to make sure they arent bent.
So what this is telling me is that either the car has too much power for the pulley and spinning it up too fast or there was a crack in the pulley already.
I will be getting a custom pulley made now and to be made so its a press fit by Precisison Engineering.
Then hope nothing else goes wrong and I can take it to the drags soon

[no_8wire]

Cool...nothing I need to worry about, because
1: I will not be making as much crazy power
2: I dont have powersteering...

Good you found the source though...

[IH8TEC]

Then hope nothing else goes wrong and I can take it to the drags soon

hehe, yeah right, better be knocking on some expensive wood

[slighty_sykotic]

Cool...nothing I need to worry about, because
1: I will not be making as much crazy power
2: I dont have powersteering...

Good you found the source though...

You have a water pump and cam belt though.....

That key way drives both of them... at least the cam belt (if the 7a's dont have a belt driven water pump).

--Sykotic

[Bazda]

Cool...nothing I need to worry about, because
1: I will not be making as much crazy power
2: I dont have powersteering...

Good you found the source though...

You have a water pump and cam belt though.....

That key way drives both of them... at least the cam belt (if the 7a's dont have a belt driven water pump).

--Sykotic

7a is the same configuration as the 4a

[pc]

I would suggest removing power steering, but with that power if you have an LSD the torque steer might snap your arms off.
make the belts looseish maybe?

[Bazda]

I would suggest removing power steering, but with that power if you have an LSD the torque steer might snap your arms off.
make the belts looseish maybe?

torque steer isnt an issue in my car.

[Mr Revhead]

yeah with that much grunt itll just spin both wheels so fast there will be an allmost instant bed of molten rubber for the tyres to spin freely on

[Bazda]

Did a leak test just before and all is sweet, no bent valves . So damn I pulled the head off for nothing oh well no biggie.

So gona get it going soon and see if i can break it again

[Bazda]

yeah with that much grunt itll just spin both wheels so fast there will be an allmost instant bed of molten rubber for the tyres to spin freely on

thats tru lol, even on low boost it dont torque steer

[Bazda]

sorted out the puley on my car got a new bling one made.
Took it out last night had a few boosts, last boost of the night dropped to 3 cylinders Not too sure why yet, but this huge piece of metal on the road went under my car and felt like it lifted the rear wheels off the ground so maybe it squashed the fuel lines and made my car detonate , Cant even hear detonation as the car is too loud lol.

Here some vids I got from last night and a dyno run

http://s73.photobucket.com/albums/i212/bazda/

[IH8TEC]

and might i say people, holding that camera last night was hard when your whole body is pinned in the passenger seat including your head on the headrest and my hand was on the mic

[escortman]

hey i asked if i could look at ur mota last nite in town so mean
was it on 3cyl wen u left i thought it sounded a lil sick

[Bazda]

last boost of the night dropped to 3 cylinders Embarassed Not too sure why yet

hey i asked if i could look at ur mota last nite in town so mean
was it on 3cyl wen u left i thought it sounded a lil sick

nah it went off song way later that night.
U prob thought it sounds sick cos of the loud forgies in the engine.
Also 3" system with just the bullet style rear muff makes it sound racey