Quote: Originally Posted by VLT-025 Yeah I know.. I just get a bit sick of people bagging members on this forum. Sure, if you talk sh1t then people should set you straight, but I didn't see anything wrong with what VL Hero said here. I've got no idea what I did wrong here either. It all started after I expressed my opinion that basic 4-pot brake upgrades were not adequate for a race car. I think Munro just looks for any excuse to have a go at me to be honest, even if there if no real legitimate reason to.

Quote: Originally Posted by VLHERO I've got no idea what I did wrong here either. It all started after I expressed my opinion that basic 4-pot brake upgrades were not adequate for a race car. I think Munro just looks for any excuse to have a go at me to be honest, even if there if no real legitimate reason to. I have a bit of a funny feeling that a 4 pot calliper such as the ones below wouldnt have too much of an issue pulling me up running around a race track. Some original photos have not been recovered yet.

Quote: Originally Posted by Munro- I have a bit of a funny feeling that a 4 pot calliper such as the ones below wouldnt have too much of an issue pulling me up running around a race track. I don't disagree with you, but its not an RX7 or GTS-t setup like I was talking about is it.

Quote: Originally Posted by kenworth I think you just hit the nail right on the ****ing head really hard Exactly I agree with him 200% Quote: Originally Posted by CJW Another thing to consider with brakes (as Lazyass mentioned earlier) is the firewall flex. In a VL commodore it's absolutely shocking, 3mm+ easily under high pressure and that does woeful things to pedal feel. From the factory the master cylinder has this token little galvanised steel (1.2mm) folded bracket that's attatched to the strut tower in an attempt to 'stop' this and locate the end of the MS. In reality it does nothing. When I did the rear disc conversion on my car I made up a beefier little bracket to replace this one and it made a huge difference. See below (PS I know my engine bay is hella dirty ) Looks nice PM sent mate Quote: Originally Posted by azzaturbo hi im doing a n/a turbo convertions and was wondering about the brakes! ive been told it would be best to up grade them! if i put vl turbo brakes or bigger on the front should i up grade the rear from drum??? or would they be right? It comes down to personal preference, but I'd say change them. Also depends on your budget as well. PM Sent mate Some original photos have not been recovered yet.

so from this ive learnt that DBA sloted rotors without drilled are the best, a vt caliper would be best for my driving & i should use a vt master cyclinder & booster not a vlt one coz they cause it to be spoungy thanks all

Vt fronts standard rear disk, and vlt servo and master, pedal will not be spongy

Quote: Originally Posted by azzaturbo so from this ive learnt that DBA sloted rotors without drilled are the best, a vt caliper would be best for my driving & i should use a vt master cyclinder & booster not a vlt one coz they cause it to be spoungy thanks all Its the VT calipers that are known for causing a spongy pedal. They have a tendency to flex.

Where do the clipers flex? as i have stated, my brake pedal is as good or better than before with the standard vlt fronts.

yea thats what i was wondering about the flexing! what tha?

The fire wall flexes when you oush the brake pedal hard, but if you look up a few posts to an upgraded master cylinder bracket, that should take most of the flex out, not sure what flex in the caliper is though?

yea i asked that fella with the braket if he wanted to make me one but didnt have the time to.

Take your bracket into a local engineer, or machine shop and get them to make one up, mine is about 5-10 mm steel, doesnt move at all.

worth doing i take it!

Do a search for the flexing VT calipers. Its fairly well known.

The calipers flex, thats probably why HSV don't use them. Because VT calipers have such large pistons they need a 1 1/16" or something quick fill master cylinder. Most people find the 1" VLT master spongy with VT calipers but there are a few who are happy with it.

from what I have read you would want to be using the VT V8 master and booster which is 1 1/4" and has a higher rate of fluid movement. Personally if your going to go to all this bother, get yourself something that is at least better quality. Yer it will probably cost you some more but at least your going to be guaranteed to be better than rebuilt VLT callipers.

true true

Quote: Originally Posted by Munro- from what I have read you would want to be using the VT V8 master and booster which is 1 1/4" and has a higher rate of fluid movement. Personally if your going to go to all this bother, get yourself something that is at least better quality. Yer it will probably cost you some more but at least your going to be guaranteed to be better than rebuilt VLT callipers. Yes i agree on both counts. The VT upgrade is cheaper but the calipers have twin 42mm pistons and this is why the stepped bore VT master/booster is recommended and often used.And again i agree that a better brake upgrade is recommended like the Group A 330mm with the C4 caliper as they have the twin 38mm pistons and can be used with the 1" master.

Group A 330mm with the C4 caliper u reckon. group A setup would be hard to find second hand tho?

Quote: Originally Posted by azzaturbo Group A 330mm with the C4 caliper u reckon. group A setup would be hard to find second hand tho? Not at all, plenty of C4 Corvettes were made mate. LAZYASS sells conversion kits as a matter of fact.