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[feeutfo]

So how much did your 40bhp gain cost? If you don't mind me asking?

Nearly £2000

And the wheels and tyres?

pass...

I can see what's coming though.

Go on...

some form of criticism or how I know nothing and make false claims etc.

Anyway going off topic here.   :-/

Well, 2k for 40bhp is a lot of dosh I'm sure you'll agree. I would be loathed to water that power gain down by spending even more cash on bigger wheels and tyres personally, but each to their own.

Thing is dif ratios can be changed to counter wheels size for a fraction of that cost. Or going further, a differemt lump altogether, v8 and straight 6 turbo lumps, although rare, have all been shoe horned into omegas giving total outputs from 350 to 400hp.

Adding wheels and tyres to your known bill, that cost is not far off ls1 v8 territory IMO. A certain member on this thread could have almost doubled the stock output for that money, given the car for a period.

[51M0N]

I agree with what your saying.

I did see a black v8 on pistonheads last year. very nice indeed.

Tbf once lowered it looked silly without having bigger wheels.

now I think about it the £££ figure might be slightly out.

Still have an ecu chip to fit and more has been done since it was dyno'd. im not expecting millions of bhp but its nice to see an increase.


also i'd hate trying to tell my insurance company my omega is a v8 lol

[feeutfo]

I agree with what your saying.

I did see a black v8 on pistonheads last year. very nice indeed.

Tbf once lowered it looked silly without having bigger wheels.

now I think about it the £££ figure might be slightly out.

Still have an ecu chip to fit and more has been done since it was dyno'd. im not expecting millions of bhp but its nice to see an increase.


also i'd hate trying to tell my insurance company my omega is a v8 lol

It does go up of course. £900 for me. 

So what was modified?

[51M0N]

I agree with what your saying.

I did see a black v8 on pistonheads last year. very nice indeed.

Tbf once lowered it looked silly without having bigger wheels.

now I think about it the £££ figure might be slightly out.

Still have an ecu chip to fit and more has been done since it was dyno'd. im not expecting millions of bhp but its nice to see an increase.


also i'd hate trying to tell my insurance company my omega is a v8 lol

It does go up of course. £900 for me. 

So what was modified?

Both cats removed,
Courtenaysport cams (which allege to give +18bhp)
also remapped
Dual throttle enlarged and polished
magnecor leads
iridium plugs

and some other crap :/

As said still got the chip to fit and i really want some manifolds making as they're so restrictive

More labour cost than anything

[feeutfo]

I agree with what your saying.

I did see a black v8 on pistonheads last year. very nice indeed.

Tbf once lowered it looked silly without having bigger wheels.

now I think about it the £££ figure might be slightly out.

Still have an ecu chip to fit and more has been done since it was dyno'd. im not expecting millions of bhp but its nice to see an increase.


also i'd hate trying to tell my insurance company my omega is a v8 lol

It does go up of course. £900 for me. 

So what was modified?

Both cats removed,
Courtenaysport cams (which allege to give +18bhp)
also remapped
Dual throttle enlarged and polished
magnecor leads
iridium plugs

and some other crap :/

As said still got the chip to fit and i really want some manifolds making as they're so restrictive

More labour cost than anything

I believe the reason that v8 mv6 came into being is because the owner fitted a super charger, giving something in the region of 260bhp on low boost, which blew the bottom end out destroying the stock v6 lump. So don't go too mad.


Although I'm not sure there is a 40 bhp gain in that list tbh. And no fuel regulator?

Was this Courtney themselves?

[51M0N]

the camshaft work was. In all honesty not everything done was in my ownership I'm just finishing it off so to speak. I'm not trying to look cool and blag peoples heads, As I do know a lot more than I let on. tbf I think they dyno overead slightly, this is quite a common occurance with people seeing different results depending on where they take it for RR.

In terms of an FPR i'm currently trying to find a suitable one but had to buy 2 rear tyres yesterday  :-/

As for the supercharger blowing up the bottom end thats undestandable with the amount of strain on the pullys even at low boost.

Shame they didn't sort the cooling issue out on the original prototype v8 omega

[feeutfo]

the camshaft work was. In all honesty not everything done was in my ownership I'm just finishing it off so to speak. I'm not trying to look cool and blag peoples heads, As I do know a lot more than I let on. tbf I think they dyno overead slightly, this is quite a common occurance with people seeing different results depending on where they take it for RR.

In terms of an FPR i'm currently trying to find a suitable one but had to buy 2 rear tyres yesterday  :-/

As for the supercharger blowing up the bottom end thats undestandable with the amount of strain on the pullys even at low boost.

Shame they didn't sort the cooling issue out on the original prototype v8 omega

         

[51M0N]

the camshaft work was. In all honesty not everything done was in my ownership I'm just finishing it off so to speak. I'm not trying to look cool and blag peoples heads, As I do know a lot more than I let on. tbf I think they dyno overead slightly, this is quite a common occurance with people seeing different results depending on where they take it for RR.

In terms of an FPR i'm currently trying to find a suitable one but had to buy 2 rear tyres yesterday  :-/

As for the supercharger blowing up the bottom end thats undestandable with the amount of strain on the pullys even at low boost.

Shame they didn't sort the cooling issue out on the original prototype v8 omega

         

Meaning?

[Kevin Wood]

Meaning?

Debate pending about whether or not a change of FPR will make any difference, etc., I would say.

Quite often this is touted (by the likes of Courtenay) as a performance upgrade in itself. The truth of the matter is that, if you up the fuel pressure on a standard car, the stock ECU will just trim the fuelling back to where you originally were so it achieves nothing.

However, if you have made gains by fitting cams and a more free flowing exhaust, the injectors will be unable to supply much more fuel above a stock state of tune (they are at their limits with a standard engine IMHO) so upping the fuel pressure might be a good move. You would need to get it mapped with the new fuel pressure regulator though.

If you want to try it don't spend out on anything exotic. The 2.6/3.2 Omegas have a 3.8 Bar FPR as standard so just pick one up from a scrapper.

Kevin

[51M0N]

Meaning?

Debate pending about whether or not a change of FPR will make any difference, etc., I would say.

Quite often this is touted (by the likes of Courtenay) as a performance upgrade in itself. The truth of the matter is that, if you up the fuel pressure on a standard car, the stock ECU will just trim the fuelling back to where you originally were so it achieves nothing.

However, if you have made gains by fitting cams and a more free flowing exhaust, the injectors will be unable to supply much more fuel above a stock state of tune (they are at their limits with a standard engine IMHO) so upping the fuel pressure might be a good move. You would need to get it mapped with the new fuel pressure regulator though.

If you want to try it don't spend out on anything exotic. The 2.6/3.2 Omegas have a 3.8 Bar FPR as standard so just pick one up from a scrapper.

Kevin

you speak a lot of sense mate 

Truth be told in most instances they dont make a difference. but The opel tuning chip for the ecu combined with this should make a noticeable difference, so i am told but like most things results vary. Courtenay are not as good as hyped to be imho. If an adjustable comes up for the right price i'll have it.

[Big_Al]

and this is a tyre fitter....?

In short :-

yes, the speedo will be wrong - almost 4%, which is quite a large amount.

yes, the car will handle poorly - the suspension geometry is designed around the hub being 11.7 inches from the road. You're moving this up by half an inch, which is a massive amount, affecting handling, grip and stability under both cornering and braking.

seems this thread has gone slightly of topic - was only asking about tyres

I was just asking for opinions on this idea. I would not have gone ahead & done it without some advice from the forum.It was a possibility but maybe not now.  Seems it is not a good idea then 50 profile instead of 45 ?

Would the same bad handling issues occur if you used 18" rims & 40 profile tyres then ? :-/ :-/ :-/ :-/ :-/

[51M0N]

Did apologise earlier about the spamming sorry  8-)

All i can say is mine is lowered on shocks and springs and has 255 35 19s on the rear and 235 35 19s on the front . It handles well. but its never gonna keep up with a hot hatch etc. Its still a barge.

[MV6Matt]

Your speedo will be way out with 255/35 on a 19" rim

I used: http://www.miata.net/garage/tirecalc.html
(from this site I think) - 275/30 will keep it you all in sync
HTH

[cem_devecioglu]

Meaning?

Debate pending about whether or not a change of FPR will make any difference, etc., I would say.

Quite often this is touted (by the likes of Courtenay) as a performance upgrade in itself. The truth of the matter is that, if you up the fuel pressure on a standard car, the stock ECU will just trim the fuelling back to where you originally were so it achieves nothing.

However, if you have made gains by fitting cams and a more free flowing exhaust, the injectors will be unable to supply much more fuel above a stock state of tune (they are at their limits with a standard engine IMHO) so upping the fuel pressure might be a good move. You would need to get it mapped with the new fuel pressure regulator though.

If you want to try it don't spend out on anything exotic. The 2.6/3.2 Omegas have a 3.8 Bar FPR as standard so just pick one up from a scrapper.

Kevin

 

[51M0N]

Your speedo will be way out with 255/35 on a 19" rim

I used: http://www.miata.net/garage/tirecalc.html
(from this site I think) - 275/30 will keep it you all in sync
HTH

According to that link when I am doing 60mph I will actually be doing 61.8mph. I can live with that.