what proformance mods next

[adnandunn]

my car currently has the folowing done on it:

its a r reg vts.

raceland manifold, magnex de cat, magnex backbox

kent cams, head work, ported throttle boddies, webber fuel rail, chiped and mapped

raceing clutch, balenced and lightened flywheel

enclosed induction kit, quickshift gear stick and all the linkage. lightweight alloys

full suspention setup

WHAT CAN I DO NEXT it is running around 140 bhp at the wheels

[Baz]

turbo, superchager, throttle bodies.

some better brakes

[adnandunn]

going to get some better brakes on it what do you recomend? 206 180 setup?

i dont want to turbo it anythink elso i could do.
it also has a triply head gasket

[Baz]

brakes depends on what wheels your running

[adnandunn]

15" mate 266mm or 285mm ?

[Baz]

go for either the 206 GTi 180 Brakes or the 306 GTi-6 then, personally....

[adnandunn]

thank for your advise let me know if anyone is selling any
back to the proformance what else could i do bigger injectors/fuel pump?

[RCD-Performance]

Whats your flywheel figure mate?
Which cams?
Your running the standard inlet? or iTB's?

You could change the cams for something a little more harsh, cahnge to iTB's if your in the standard intake, get some proper management.

Ross
RCD.

[Sean]

You say 'headwork', i'm assuming you mean the regular 'port and polish'? Next step would be a big valve head from QEP, you would then want to have the map tweaked to take this into account. Or instead of tweaking the standard ecu map you could go standalone management such as Omex 600, this will allow you far greater scope for further modifications as you could also run throttle bodies, turbo or supercharger with this management.
With throttle bodies you would ideally want a wilder cam although you could keep your existing one depending on spec. High comp pistons are a must. Obviously if going turbo or supercharger you want low comp pistons and possibly a cam change to one with a profile more suited to boost (again depends what current spec is). Uprated clutch is a must - you say you have a race clutch could you elaborate on the spec?
Also worth thinking about in the short-term would be a s1 106 rallye gearbox, or 106 xsi gearbox for quicker acceleration, both would be good for a throttle body set-up, but they'd possibly be too short for running boost as you'd be changing gear too often. If going down the boost route i'd stick with vts gearbox, possibly even look to fitting a vtr gearbox.

[RCD-Performance]

The lad said he didn't want to boost it :)

Big valve heads don't nesscesarily give power unless the standard valve sizes are posing a restriction to flow. A good VTS head, with a PROPER port and polish and bench flow could flow huge BHP. So why the need for exspensive big valves?

As above cma choice depends on your current spec, i would say your next best bet would definately be Throttle Bodies. with a good management system to cope with it all. Theres a great choice of Omex, KMS, RCD PnP etc. Price is your only limiting factor mate :)

Ross
RCD.

[adnandunn]

thanks sean and ross. my throttle body intake is standard at the moment.
i dont no to much about the spec ov the mods as iv just purchased it.
the clutch was 100 pounds just for the part(hope this gives you an idea)
and the headwork is ported and polished.

i think i am going to get it borred out and a bigger buterfly fitted or get webber carbs fitted next

[adnandunn]

oo and it has a mild kent cam fitted but i dont want to change this as i use the car to come to work and back in traffic every day

[RCD-Performance]

Do you know the model number of the cam matey?

I woulnd't bother with the butterfly imo matey, head for some tb's :)

[vtr130]

The lad said he didn't want to boost it :)

Big valve heads don't nesscesarily give power unless the standard valve sizes are posing a restriction to flow. A good VTS head, with a PROPER port and polish and bench flow could flow huge BHP. So why the need for exspensive big valves?

As above cma choice depends on your current spec, i would say your next best bet would definately be Throttle Bodies. with a good management system to cope with it all. Theres a great choice of Omex, KMS, RCD PnP etc. Price is your only limiting factor mate :)

Ross
RCD.

Ross another bold statement when you have done no good testing yourself.
If you look at george's thread on ssc you will find the head was restricting power to 189bhp on every type of cam, then the head was redone by pumaracing and nothing else was changed and they found 13bhp. So i dnt know how you can say the head isnt restrictive?

The valves aren't expenive either! They use vauxhall ones :)

[vtr130]

thanks sean and ross. my throttle body intake is standard at the moment.
i dont no to much about the spec ov the mods as iv just purchased it.
the clutch was 100 pounds just for the part(hope this gives you an idea)
and the headwork is ported and polished.

i think i am going to get it borred out and a bigger buterfly fitted or get webber carbs fitted next

Never get carbs fitted, why would you do that!! They will lose you power, look a dth boddies or jenvey ones!

[vtr130]

oo and it has a mild kent cam fitted but i dont want to change this as i use the car to come to work and back in traffic every day

I use my car in traffic everyday and i run catcams 809's!! :)

[RCD-Performance]

Ross another bold statement when you have done no good testing yourself.
If you look at george's thread on ssc you will find the head was restricting power to 189bhp on every type of cam, then the head was redone by pumaracing and nothing else was changed and they found 13bhp. So i dnt know how you can say the head isnt restrictive?

The valves aren't expenive either! They use vauxhall ones :)

I will never make a statement i cannot justify, hense i will apologise when proved wrong :)

The chap who produces our heads flow tested the head in question and came up with the answers i spoke about, if you feel the need to question his jusgement feel free

I did not say that a standard head will produce the flow required, however i am saying that it is "capable" of flowing such figures. Sorry if thats hard to grasp :bored:

[vtr130]

Yes because if it doesnt flow those figures on my engine, georges and many others and the head is the only thing restricting mine, and maybe the piston shape, can you explain that?

[luthor1]

VTR130, what are the head flow figures, in CFM, for your current head?

Andy
RCD Performance

[Ryan]

I will never make a statement i cannot justify, hense i will apologise when proved wrong :)

The chap who produces our heads flow tested the head in question and came up with the answers i spoke about, if you feel the need to question his jusgement feel free

I did not say that a standard head will produce the flow required, however i am saying that it is "capable" of flowing such figures. Sorry if thats hard to grasp :bored:

i thought you said that the std 16v head in other posts was capable of over 240bhp std? if so why are you then saying to get a port and polish if the standard head is perfectly fine?

[adnandunn]

Never get carbs fitted, why would you do that!! They will lose you power, look a dth boddies or jenvey ones!

which tb would you recoment and how much will they set me back?

[Ryan]

QEP allready sell DTH bodies,
Pugsport sell DTH bodies *very high cost though*
Jenvey sell decent SF bodies.

i personally wouldnt run DCOEs due to the inlet manifold design.

[vtr130]

VTR130, what are the head flow figures, in CFM, for your current head?

Andy
RCD Performance

Im not 100% sure! I will find out.

[saxokid100]

You could get forgged pistons.

[saxokid100]

I meant forged pistons,my frend had them when he rebuilt his vts engine....

[adnandunn]

i was wanting to do the chepest mods first ie throttle boddies larger fuel pump and then if it still isnt fast enough go for forrged pistons standalone ecu

[RCD-Performance]

Please correct me im wrong but i was under the impression the standard ECU won't run TB's as they are mapped against TPS not MAP (as the standard one is)? :)

Ross
RCD.

[Ryan]

i was wanting to do the chepest mods first ie throttle boddies larger fuel pump and then if it still isnt fast enough go for forrged pistons standalone ecu

that is the most backward way to look at tuning, espec as on proper TBS u need to run a standalone.

the standalone is the best thing to get first! if you keep buying bits to the engine you are forever remapping it.

[adnandunn]

Please correct me im wrong but i was under the impression the standard ECU won't run TB's as they are mapped against TPS not MAP (as the standard one is)? :)

Ross
RCD.

you are probably right ross, so if i change the throttle boddies the standard ecu wouldnt be able to handle it???

[RCD-Performance]

you are probably right ross, so if i change the throttle boddies the standard ecu wouldnt be able to handle it???

No matey, your best off, as Ryan said, to look at standalone management first, then add your other mods and get the fitter to tweak/change the map when you add them.

Theres a few out there to choose from get reading! :)

Ross
RCD.

[adnandunn]

thanks all will rep later as im at wk

[mutley]

The head & tb was port & polished by powerzone, It's using ap racing clutch. Its 167.5bhp at the fly,

Adam pm me got a gti-6 brakes et up for sale, shaved with new brembo disks ( spotted & slotted) and pads 120 if you want them...

[vtr130]

thanks all will rep later as im at wk

I want rep!! lol

Look at an omex 600 ecu, they are one of the best out there!! Any many mappers prefer them 2 be honest.

If you got to www.hiflowheads.co.uk they will probably sort you a deal out on a package. Say Craig sent you!

[Matty-VTR]

I fitted an MBE standalone management system on my vtr last week, i have no other engine mods and after my dad mapped it gained 10bhp and bottom end is alot better.

I'd say go for an aftermarket ECU and get it remapped mate, then if u still want more power go for some TB's which the ECU will run and get it mapped again

[adnandunn]

I want rep!! lol

Look at an omex 600 ecu, they are one of the best out there!! Any many mappers prefer them 2 be honest.

If you got to www.hiflowheads.co.uk they will probably sort you a deal out on a package. Say Craig sent you!

its saying i must spread rep before giving it to you again sorry