Discussion
Following on from the 430BV thread I'm just wondering g how much bigger the 500 valves are than the 4.6
Can anyone tell me please.
Can the 500 valves be fitted to the 4.6 heads
Would the gains be marginal?
I have steel rockers and a Kent 885 cam already fitted,,
Doms going to port and polish my heads to within a few thou of their lives so is it really worth putting the bigger valves in?
FI is where we'll all be one day so should I leave the valves alone.
Can anyone tell me please.
Can the 500 valves be fitted to the 4.6 heads
Would the gains be marginal?
I have steel rockers and a Kent 885 cam already fitted,,
Doms going to port and polish my heads to within a few thou of their lives so is it really worth putting the bigger valves in?
FI is where we'll all be one day so should I leave the valves alone.
Yes Daz I'm aware the valving is expensive hense the question
It's not expensive if I'm only porting the heads and I remove engine
If I eventually go FI then surely I want the heads to be as open as possible,
So what's a good turbo install going to cost,,,
As you know I made a pigs ear of my chassis last year so engine out i can inspect chassis better,
If my riggers look like they can hang on a few more years then I can do a proper job with the right materials
Daz you have stage 4 heads, what does that include?
Do you not have a build sheet, if not why not and can your engine builder remember exactly what he did ?
I'd be wanting to rack his brains to get the exact spec.
You've got small journals have you not?
Cheers Al
It's not expensive if I'm only porting the heads and I remove engine
If I eventually go FI then surely I want the heads to be as open as possible,
So what's a good turbo install going to cost,,,
As you know I made a pigs ear of my chassis last year so engine out i can inspect chassis better,
If my riggers look like they can hang on a few more years then I can do a proper job with the right materials
Daz you have stage 4 heads, what does that include?
Do you not have a build sheet, if not why not and can your engine builder remember exactly what he did ?
I'd be wanting to rack his brains to get the exact spec.
You've got small journals have you not?
Cheers Al
Hang on, you must have one of the fastest N/A engines out there,,
So with standard Lucus AFM set up what power would you have
320 Max or more?
With porting mines close to that I reckon,,,
It has got an aggressive chip mind!
I've done some race starts and I defo can get to 60 in 4
And that's with a s
t clutch and hard tyres
It's got torque and screams up real quick so with better breathing and a decent ecu trumpets etc. ,,
Told you Dom built a good engine for me,,
So with standard Lucus AFM set up what power would you have
320 Max or more?
With porting mines close to that I reckon,,,
It has got an aggressive chip mind!
I've done some race starts and I defo can get to 60 in 4
And that's with a s
t clutch and hard tyres It's got torque and screams up real quick so with better breathing and a decent ecu trumpets etc. ,,
Told you Dom built a good engine for me,,
Funny that,,,,
When I drive mine around the roads I use about 3mm of throttle pedal and it's still to fast,,,
There's real merit in that comment Daz,,,
How often do you open her up and feel the full power on the roads,
If you do the miles it's hardly ever unless your a dick if you ask me.
My cars now a toy so the extra engine work on the heads is more about having it than actually using it.
Fatboychims 4.0 l supercharged really impressed me,, sounded brill and ripped
I stood on the pit wall at Snett and thought what the fk, so quick up the hill.
Hey stop it's my engine were talking about,
So what's the difference in size between the 4.6 and 5 l valves.
The reason I ask is I drove Qbee's 5.0 l at Snetterton and it was a lot faster than my car and not even fuelling properly at the time.
Saying that I've got a more aggressive chip now and mines far better so ????
When I drive mine around the roads I use about 3mm of throttle pedal and it's still to fast,,,
There's real merit in that comment Daz,,,
How often do you open her up and feel the full power on the roads,
If you do the miles it's hardly ever unless your a dick if you ask me.
My cars now a toy so the extra engine work on the heads is more about having it than actually using it.
Fatboychims 4.0 l supercharged really impressed me,, sounded brill and ripped
I stood on the pit wall at Snett and thought what the f
k, so quick up the hill. Hey stop it's my engine were talking about,
So what's the difference in size between the 4.6 and 5 l valves.
The reason I ask is I drove Qbee's 5.0 l at Snetterton and it was a lot faster than my car and not even fuelling properly at the time.
Saying that I've got a more aggressive chip now and mines far better so ????
I'm thinking I'll need bigger fuel injectors etc
Let's hope someone with more tuning knowledge will be along to explain your graph, def looks like it's peak performance and torque drops off a bit early but the bhp looks to be about right for your set up!
A900ss, was your car re mapped and or chipped after the new cam etc,,
Let's hope someone with more tuning knowledge will be along to explain your graph, def looks like it's peak performance and torque drops off a bit early but the bhp looks to be about right for your set up!
A900ss, was your car re mapped and or chipped after the new cam etc,,
Thanks Peter, that's rather impressive,,
Who ported the inlet manifold for you ( Rob )
Standard injectors,, even more impressive
If I can get 320/330 bhp from the 4.6 I'll be happy,
It's got loads of torque already so it's just about freeing up the top rev range a bit.
I don't want to bore you but your 4.6, what spec did you go to and what did that produce.
I really want to leave the valves alone but if it's vital to get the last bit out of it I'll consider it carefully.
I'd go FI but I like N/A !!!
As usual until some business is conducted I'm not sure what my budget will be,
It's gonna happen though.
Thanks for your input Alun
Who ported the inlet manifold for you ( Rob )
Standard injectors,, even more impressive
If I can get 320/330 bhp from the 4.6 I'll be happy,
It's got loads of torque already so it's just about freeing up the top rev range a bit.
I don't want to bore you but your 4.6, what spec did you go to and what did that produce.
I really want to leave the valves alone but if it's vital to get the last bit out of it I'll consider it carefully.
I'd go FI but I like N/A !!!
As usual until some business is conducted I'm not sure what my budget will be,
It's gonna happen though.
Thanks for your input Alun
I've removed precats, that's obviously helping already.I'll have to put Alex old de cat Y back on!
That's really good figures for the 4.6,,
I'll make a shopping list that includes ear muffs, ?
So the head work in conjunction with all the other bits is important to get near that figure, you were running coil packs when on the rollers with the 4.6 Peter ?
That's really good figures for the 4.6,,
I'll make a shopping list that includes ear muffs, ?
So the head work in conjunction with all the other bits is important to get near that figure, you were running coil packs when on the rollers with the 4.6 Peter ?
[/quote]
Nope, good old 14CUX!
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Wow, some motor,
That's encouragement if ever I needed it, cheers Peter,
I've got to dump the Lucus
I'm fed up with crap Stepper motors effecting the running let alone the extra advance I could get on a decent ecu and trigger.
Mmm, very good. Thanks for your input
carsy said:
Alun, there`s a Canems ecu for sale in the classifieds. All but brand new with new wiring loom.
http://www.pistonheads.com/classifieds/parts-and-p...
Thanks Carsy,, mmm, I'd buy that but I'm not really in a position to right now,,, http://www.pistonheads.com/classifieds/parts-and-p...
Pita... Alun
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