17 replies to this topic

[edwards]

hia, i have just bought an astra mk4 turbo with a good spec rebuilt engine which im going to use for my vxt, the engine has had the following work carried out but im just wondering if i would need much more to see near 500bhp? the engine at the moment is running 300bhp. rebuild consisted of complete head rebuild,valve stem seals,valves,guides and skim,block was rebored to 86.5 all work done by west of scotland engineering,cosworth forged pistons with p.e.c forged rods and a.r.p rod bolts,crank balanced,brand new courtney motorsport fast road clutch and hydrolic slave cylinder,complete renew gaskets and head bolts,new water pump timing belt,acl and mahl racing shells,16 new hydrolic vauxhall lifters fitted,oil restrictor bolt fitted,cool running thermostat,colins dump valve,x20xe inlet cam fitted with timing retarded tooth with brand new vxr turbo which was then sent to turbo dynamics after1000miles for upgrade to stage 2 hybrid,engine is mapped with stage 3 red dot map approx 300bhp and is bottom end built to 500bhp i may stick to the 300 bhp but i was just wanting to know as would be nice to have abit more power........... bit gutted now as i just orderd some parts for stage 4 then seen this! the parts i orderd may be for sale, was clutch and flywheel....... thanks,ad

[redvts]

You might struggle with the cooling as no doubt the astra had a bigger intercooler? I'd be interested in some bits depending on what they are! Pm me!

[edwards]

i will be running a charge cooler system and will upgrade to an alloy rad and anything needed........ what parts are you in need of? i have many many z20let engine parts here available if you need anything. thanks

[redvts]

What mods are you selling?

[edwards]

i orderd a fast road clutch and a lightened and balanced flywheel, i know the ones on the engine have done just 2000miles but i will check them and maybe sell the ones i orderd. not alot of mods for sale atm

[redvts]

PM'd

[redvts]

PM'd

[zebwach]

Inlet manifold Exhaust Manifold Uprated Fuel Pump Larger Injectors Bigger Turbo 3 Inch Exhaust 6 Paddle Clutch Larger Inlet Pipework, AFM, maybe larger throttle body LSD/ATB and sticky tyres to put the power down A new map Good luck and beware of the lag. Zach

[Nev]

Inlet manifold Exhaust Manifold Uprated Fuel Pump Larger Injectors around 900cc/min mark. Bigger Turbo (Garrett GXT30 or larger or equiv from some other manufacturer). 3+ Inch Exhaust (3 inch will be a restriction, 3.5+ would be better). 6 Paddle Clutch Larger Inlet Pipework from airbox to turbo Improved airbox. Larger MAF. LSD/ATB and sticky tyres to put the power down A new map Enlarged throttlebody Intercooler. Upsized air pipes from turbo to throttlebody. Oil cooler. Uprated suspension to cope with the power. Uprated engine mounts to cope with the twisting of the engine. Also without major cylinder head changes like larger valves, big lift cams you are going to need a big turbo. Probably a GT3076 or even a GT35 - however these will indude lag... Adam, you need to read my entire website and digest it carefully. There is an almost overwhelming amount of stuff you need to consider changing and it will cost you a LOT and take a long time. Nev.

Edited by Nev, 03 March 2011 - 08:32 AM.

[Nev]

Inlet manifold
Exhaust Manifold
Uprated Fuel Pump
Larger Injectors around 900cc/min mark.
Bigger Turbo (Garrett GXT30 or larger or equiv from some other manufacturer).
3+ Inch Exhaust (3 inch will be a restriction, 3.5+ would be better).
6 Paddle Clutch
Larger Inlet Pipework from airbox to turbo
Improved airbox.
Larger MAF.
LSD/ATB and sticky tyres to put the power down
A new map
Enlarged throttlebody
Intercooler.
Upsized air pipes from turbo to throttlebody.
Oil cooler.
Uprated suspension to cope with the power.
Uprated engine mounts to cope with the twisting of the engine.
Oil jets to cool the pistons.
External wastegate probably.
Heat shielding.
Block/waterway strengthening.
Super cool running spark plugs.
Modified oil + waterway pipes to turbo.

Also without major cylinder head changes like larger valves, big lift cams you are going to need a big turbo. Probably a GT3076 or even a GT35 - however these will induce lag...

Adam, you need to read my entire website and digest it carefully - I have specially written it to help others, please take advantage of it. There is an almost overwhelming amount of stuff you need to consider changing and it will cost you a LOT and take a long time.

Getting to a more realistic 400 BHP would be achievable without some of these mods above. 400 BHP is a lot of power for a titchy car like the VX and assuming you are a capable driver I can't imagine any standard road cars overtaking you on a track except the odd thing like a Porsch GT1, Radical, Norma.

Nev.

Edited by Nev, 03 March 2011 - 08:46 AM.

[edwards]

thanks very much for that reply nev, i was thinking of pm'ing you but didnt realy want to bother you as for that goes there is alot more work involved than i expected but was worth me asking i gues........ as for the 400bhp i might be tempted to do this as i have a few weeks before my car will be back from paint and the engine will be out of the astra by monday to get it ready to go in the vx

[OneYet]

thanks very much for that reply nev, i was thinking of pm'ing you but didnt realy want to bother you

as for that goes there is alot more work involved than i expected but was worth me asking i gues........

as for the 400bhp i might be tempted to do this as i have a few weeks before my car will be back from paint and the engine will be out of the astra by monday to get it ready to go in the vx

But before you put the engine in the VXT could you please send the ECU to sweden first.
Or see what happened to it in the mail.

Edited by OneYet, 03 March 2011 - 10:44 AM.

[edwards]

i sent you a reply? your ecu was sent out some time ago now

[OneYet]

i sent you a reply? your ecu was sent out some time ago now

Yepp! February 25. But you promised to check with the post office where the ECU may be since it's not in sweden.

Edited by OneYet, 03 March 2011 - 12:19 PM.

[edwards]

okie dokie any way back to topic, what more will i need for the 400bhp mark? oneyet, i will find out what i can tomorrow when i go to the post office, i have thousands of reciepts so i will have to find yours. pm me though rather than come in my threads.

[Darcini]

come in my threads.

you may want to rephrase that bit

[OneYet]

okie dokie

any way back to topic, what more will i need for the 400bhp mark?

oneyet, i will find out what i can tomorrow when i go to the post office, i have thousands of reciepts so i will have to find yours. pm me though rather than come in my threads.

I have, I have, I have. Quite a few times. I thought that maybe you where in hospital with that knee again. But then I saw this thread.
Just check your PM's.

Back to topic with a lot of horsepowers.

[Cookies220]

come in my threads.

you may want to rephrase that bit

Child!