Discussion
ClassiChimi said:
Yeah I think Dom might have mentioned something like that to me at the time,, I'd only just got into the Chims and he def mentioned the engines were all a bit experimental or more to the point they just tried different things on all of them.
BV's are the same size valves as the 4.6 are they not???
280bhp out of a 4.3/5 sounds like it must have large valves to me.
Is there not a dedicated club or something for you 430BV Chaps.
If not there should be, lol.
Rare monsters indeed.
The 4.3 B.V may have the same size valves as the 500 or selected 450's but you will find the workmanship is far higher along with the porting work with a true set of 4.3 B.V heads the one's I see pictured looked superb BV's are the same size valves as the 4.6 are they not???
280bhp out of a 4.3/5 sounds like it must have large valves to me.
Is there not a dedicated club or something for you 430BV Chaps.
If not there should be, lol.
Rare monsters indeed.
although no reason why your 450/500 heads could not be taken to the same spec ...... but at a price 
heaven only knows what one of these 4.3 BV's would go like with a bit more CR larger ported intake manifold & larger trumpet base all matching those heads intakes 
I bet the exhaust manifolds need opening up to match the huge exhaust ports too 
This sites bad for my bank balance,,,
Sardinicus, you've just got my juices flowing,, I've made a phone call,,
I'm having the engine out and the heads ported,,
FFS.
Ever since I got into the Chims,, I have this thing about the tuning of those 430BV's
For not a lot of money I'm having them done.
I really get on with Dom..... Stop laughing !!!
I'll pull the lump out and take it to him
He'll do the heads
I'll drop lump in and trailer car to him to set up,,,,
I'm only 5000 miles into a re build so don't want to effect warranty.
I'm also only 7 miles from his place so,,,,,,,,,,,,,,,,
Soon as I've sold something I'll be be having a play.
Engine out,, I can re do my chassis properly too,
It's all good or what.
The things this site has me doing,,
Great en it,, hahah.
Yes yes yes,,, heads blown right out
It's the start if a long project me thinks,,
Bloody big valves, who brought that up,, haha.
Sardinicus, you've just got my juices flowing,, I've made a phone call,,
I'm having the engine out and the heads ported,,
FFS.
Ever since I got into the Chims,, I have this thing about the tuning of those 430BV's
For not a lot of money I'm having them done.
I really get on with Dom..... Stop laughing !!!
I'll pull the lump out and take it to him
He'll do the heads
I'll drop lump in and trailer car to him to set up,,,,
I'm only 5000 miles into a re build so don't want to effect warranty.
I'm also only 7 miles from his place so,,,,,,,,,,,,,,,,
Soon as I've sold something I'll be be having a play.
Engine out,, I can re do my chassis properly too,
It's all good or what.
The things this site has me doing,,
Great en it,, hahah.
Yes yes yes,,, heads blown right out
It's the start if a long project me thinks,,
Bloody big valves, who brought that up,, haha.
Sardonicus said:
he 4.3 B.V may have the same size valves as the 500 or selected 450's but you will find the workmanship is far higher along with the porting work with a true set of 4.3 B.V heads the one's I see pictured looked superb although no reason why your 450/500 heads could not be taken to the same spec ...... but at a price heaven only knows what one of these 4.3 BV's would go like with a bit more CR larger ported intake manifold & larger trumpet base all matching those heads intakes I bet the exhaust manifolds need opening up to match the huge exhaust ports too
500 heads OF THE SAME ERA are just as fine... but there will certainly be no 450 (4.6) heads from that era although no reason why your 450/500 heads could not be taken to the same spec ...... but at a price heaven only knows what one of these 4.3 BV's would go like with a bit more CR larger ported intake manifold & larger trumpet base all matching those heads intakes I bet the exhaust manifolds need opening up to match the huge exhaust ports too 
spend said:
500 heads OF THE SAME ERA are just as fine... but there will certainly be no 450 (4.6) heads from that era
;) Yeh the 450 is a bit strange Dave some appear to have differing specs inc valve sizes also late 500 heads look a bit half baked IMO too i.e BV'ed but poor/lack porting and massive guide protrusion 
but this is good because it means there is a bit of scope for improvement which is always a bonus 
Sardonicus said:
) Yeh the 450 is a bit strange Dave some appear to have differing specs inc valve sizes also late 500 heads look a bit half baked IMO too i.e BV'ed but poor/lack porting and massive guide protrusion but this is good because it means there is a bit of scope for improvement which is always a bonus
Its because some very few early 450BVs were the same build as the 450 seac and the tuscan challenge 4.5 engine, before the 4.6 was made also late 500 heads look a bit half baked IMO too i.e BV'ed but poor/lack porting and massive guide protrusion but this is good because it means there is a bit of scope for improvement which is always a bonus ClassiChimi said:
This sites bad for my bank balance,,,
Sardinicus, you've just got my juices flowing,, I've made a phone call,,
I'm having the engine out and the heads ported,,
FFS.
Ever since I got into the Chims,, I have this thing about the tuning of those 430BV's
For not a lot of money I'm having them done.
I really get on with Dom..... Stop laughing !!!
I'll pull the lump out and take it to him
He'll do the heads
I'll drop lump in and trailer car to him to set up,,,,
I'm only 5000 miles into a re build so don't want to effect warranty.
I'm also only 7 miles from his place so,,,,,,,,,,,,,,,,
Soon as I've sold something I'll be be having a play.
Engine out,, I can re do my chassis properly too,
It's all good or what.
The things this site has me doing,,
Great en it,, hahah.
Yes yes yes,,, heads blown right out
It's the start if a long project me thinks,,
Bloody big valves, who brought that up,, haha.
If you are having bigger valves fitted as well, just make sure you know what you are getting. To go to big valves as in the 430BV and the 500 valves you will need new bigger seats fitting. This isnt cheap! I recently enquired about this with Chesmans and for the machining work and then buying the valves from r.e.c it was the best part of 1k. This was just for valves and new seats, no porting or new guides. These valves are approx 3mm larger than the standard size valves.Sardinicus, you've just got my juices flowing,, I've made a phone call,,
I'm having the engine out and the heads ported,,
FFS.
Ever since I got into the Chims,, I have this thing about the tuning of those 430BV's
For not a lot of money I'm having them done.
I really get on with Dom..... Stop laughing !!!
I'll pull the lump out and take it to him
He'll do the heads
I'll drop lump in and trailer car to him to set up,,,,
I'm only 5000 miles into a re build so don't want to effect warranty.
I'm also only 7 miles from his place so,,,,,,,,,,,,,,,,
Soon as I've sold something I'll be be having a play.
Engine out,, I can re do my chassis properly too,
It's all good or what.
The things this site has me doing,,
Great en it,, hahah.
Yes yes yes,,, heads blown right out
It's the start if a long project me thinks,,
Bloody big valves, who brought that up,, haha.
You can however have valves fitted that are just 1.5mm bigger than standard valves. They fit on the original seats with just a re cut. Much cheaper job and the valves are also a lot cheaper from Real Steel. People also refer to these valves as Big Valve. They are however not true TVR BV size.
So just make sure you know what you are getting. If its costing not a lot of money you are probably getting the middle size valve and not true BV`s.
carsy said:
If you are having bigger valves fitted as well, just make sure you know what you are getting. To go to big valves as in the 430BV and the 500 valves you will need new bigger seats fitting. This isnt cheap! I recently enquired about this with Chesmans and for the machining work and then buying the valves from r.e.c it was the best part of 1k. This was just for valves and new seats, no porting or new guides. These valves are approx 3mm larger than the standard size valves.
You can however have valves fitted that are just 1.5mm bigger than standard valves. They fit on the original seats with just a re cut. Much cheaper job and the valves are also a lot cheaper from Real Steel. People also refer to these valves as Big Valve. They are however not true TVR BV size.
So just make sure you know what you are getting. If its costing not a lot of money you are probably getting the middle size valve and not true BV`s.
What he said You can however have valves fitted that are just 1.5mm bigger than standard valves. They fit on the original seats with just a re cut. Much cheaper job and the valves are also a lot cheaper from Real Steel. People also refer to these valves as Big Valve. They are however not true TVR BV size.
So just make sure you know what you are getting. If its costing not a lot of money you are probably getting the middle size valve and not true BV`s.
ClassiChimi said:
This sites bad for my bank balance,,,
Sardinicus, you've just got my juices flowing,, I've made a phone call,,
I'm having the engine out and the heads ported,,
FFS.
Ever since I got into the Chims,, I have this thing about the tuning of those 430BV's
For not a lot of money I'm having them done.
I really get on with Dom..... Stop laughing !!!
I'll pull the lump out and take it to him
He'll do the heads
I'll drop lump in and trailer car to him to set up,,,,
I'm only 5000 miles into a re build so don't want to effect warranty.
I'm also only 7 miles from his place so,,,,,,,,,,,,,,,,
Soon as I've sold something I'll be be having a play.
Engine out,, I can re do my chassis properly too,
It's all good or what.
The things this site has me doing,,
Great en it,, hahah.
Yes yes yes,,, heads blown right out
It's the start if a long project me thinks,,
Bloody big valves, who brought that up,, haha.
Hi Al, great to see you back my friend and love the impulsiveness! Top Man Sardinicus, you've just got my juices flowing,, I've made a phone call,,
I'm having the engine out and the heads ported,,
FFS.
Ever since I got into the Chims,, I have this thing about the tuning of those 430BV's
For not a lot of money I'm having them done.
I really get on with Dom..... Stop laughing !!!
I'll pull the lump out and take it to him
He'll do the heads
I'll drop lump in and trailer car to him to set up,,,,
I'm only 5000 miles into a re build so don't want to effect warranty.
I'm also only 7 miles from his place so,,,,,,,,,,,,,,,,
Soon as I've sold something I'll be be having a play.
Engine out,, I can re do my chassis properly too,
It's all good or what.
The things this site has me doing,,
Great en it,, hahah.
Yes yes yes,,, heads blown right out
It's the start if a long project me thinks,,
Bloody big valves, who brought that up,, haha.
I am having my Austin Healey 100-4 head gas flowed at Chesman at the moment and that is costing £400 without the cost of having new seats cutting in and valve guides, so £1 k sounds good if they are supplying everything barring
mind that the Austin is only 4 cylinders!
After the 430 BV is finished at the trimmers and the new seats are fitted I will see about getting a rolling road test done to find out once and for all what the factory supplied big valves made in Bhp.
Should be the same as the Griff as the engine is the same.?
Anyone know the figures for the Griff ?.
mind that the Austin is only 4 cylinders!
After the 430 BV is finished at the trimmers and the new seats are fitted I will see about getting a rolling road test done to find out once and for all what the factory supplied big valves made in Bhp.
Should be the same as the Griff as the engine is the same.?
Anyone know the figures for the Griff ?.
monkeymoo4u said:
I will see about getting a rolling road test done to find out once and for all what the factory supplied big valves made in Bhp.
Should be the same as the Griff as the engine is the same.?
Anyone know the figures for the Griff ?.
Sorry can't answer the question, and appreciate I'm stating the obvious, but the power output is going to be dependant largely on what cam you're using, and what, if anything over standard you've done to induction/exhaust, ignition/fuelling management... If it's just the bigger valves then I guess you'll get a fair comparison over the original 430 BV's.... Not read the whole thread in detail so apologies if I've missed the point... Should be the same as the Griff as the engine is the same.?
Anyone know the figures for the Griff ?.
Hats off to you, I love the idea of an original classic best of the bunch such as the 430... It's kind of a purist thing... which actually doesn't make a lot of sense in TVR world
Good luck with it,
Chilli
You would have to factor in the cost of high lift cams, new followers ,journals,all the porting and gas flowing of the heads, cutting in the new valve seats and the cost of the parts not to mention the ecu upgrade , don't know if the pistons needed deeper pockets because of the higher lift cam so could be thousands,
It was a £5 thousand pound option over the standard car to have this engine fitted when new !!!
No wonder they only got orders for 12 of them!
It was a £5 thousand pound option over the standard car to have this engine fitted when new !!!
No wonder they only got orders for 12 of them!
Hi Al, great to see you back my friend and love the impulsiveness! Top Man
Hi Graham,I've actually been thinking about it for awhile,,, about 12 hours hahahah
Couldn't help but ring Dom and ask him what could be done, very reasonable if I remove engine so I can't see a good reason not to.
It's a penis extension, this girl I'm knocking off I just can't satisfy her,,
Maybe my big valves will do the trick,,,
I've been going though a tight patch,, nearly out the other end and I need something to justify the last few years of living like a hermit,,
Anyway back to BV's,,, love em.
There is a lot of information on the original 4.3BV engines in the link below to the Griffith forum. It includes an original engine build sheet to show the parts that were used by the factory. Hope the link works. http://www.pistonheads.com/gassing/topic.asp?h=0&a...
While we're playing cams, we stop to admire the porting work on this 430BV's heads. They are super smooth, smoother than any other head we've had in. And the smoothness carries on all the way from the top of the port to the valve. It shows where the extra money went when you bought a BV from the factory. — at Southways Automotive - Kit, Classic & Sports Car Specialists.
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