Str8-Sixs race engine...
Discussion
Stunning thing.
Our race engine for the Tuscan. GT 4Ltr Speed Six.
Crossbolted & destressed block.
EN40B steel crankshaft.
H-section steel conrods.
96mm Omega race pistons.
Gasflowed cylinder head.
GT spec camshafts and finger followers.
Tuftrided & wasted valves.
Uprated valve seats.
Double valve springs.
Uprated aux chain kit.
Geared down pumps.
Uprated roller bearing 1/2 time.
Modified Spesso headgasket.
MBE 975 ECU running 12 injectors sequentially.
Upper injectors fazed in from 2500 rpm.
Uprated roller bearing throttle bodies.
Bespoke carbon airbox with optimum ram air intake.
Ceramic coated headers with bespoke side exit exhaust system.
Lightweight flywheel.
AP Racing twin plate sintered paddle clutch.
6 Speed sequential gearbox.
Limited slip diff (plate type)
Electric pumps & oil coolers for diff & gearbox.
8200 rpm rev limit.
Built to run hard for 50hrs
Hmmm.... I wonder how much that bottom end is.....
C'mon TVR - great to see us racing again.
Our race engine for the Tuscan. GT 4Ltr Speed Six.
Crossbolted & destressed block.
EN40B steel crankshaft.
H-section steel conrods.
96mm Omega race pistons.
Gasflowed cylinder head.
GT spec camshafts and finger followers.
Tuftrided & wasted valves.
Uprated valve seats.
Double valve springs.
Uprated aux chain kit.
Geared down pumps.
Uprated roller bearing 1/2 time.
Modified Spesso headgasket.
MBE 975 ECU running 12 injectors sequentially.
Upper injectors fazed in from 2500 rpm.
Uprated roller bearing throttle bodies.
Bespoke carbon airbox with optimum ram air intake.
Ceramic coated headers with bespoke side exit exhaust system.
Lightweight flywheel.
AP Racing twin plate sintered paddle clutch.
6 Speed sequential gearbox.
Limited slip diff (plate type)
Electric pumps & oil coolers for diff & gearbox.
8200 rpm rev limit.
Built to run hard for 50hrs
Hmmm.... I wonder how much that bottom end is.....
C'mon TVR - great to see us racing again.
As a comparison (in terms of race engine life).
Ric Wood Essex 3.0 V6 race engine that delivers 260-270 bhp on a single carburettor. 10 hours. 12-13K ish I understand.
50 hours life? Unlikely to be an engine built for sprint races, I supsect that the engine is being built for longer duration events?
Ric Wood Essex 3.0 V6 race engine that delivers 260-270 bhp on a single carburettor. 10 hours. 12-13K ish I understand.
50 hours life? Unlikely to be an engine built for sprint races, I supsect that the engine is being built for longer duration events?
KillerJim said:
Can anyone explain to me why this can't be a road going engine?
I.e. why if driven on the road (i.e. 1000's of normal driving) would the engine let go so quickly (and what happens?)
I guess that some of the parts are financial over kill and that also some of the parts would be unsuitable to road use. I.e. why if driven on the road (i.e. 1000's of normal driving) would the engine let go so quickly (and what happens?)
Generally engines are built very differently for the two purposes as they have to perform in very different ways.
Very crudely you're trading reliability and usability for as much of the type of power you need for the racing you'll be doing. The right top quality parts will allow more of this trade off.
A lot of racing is done for marketing purposes as well so this will have an impact as what is designed and built will also factor in what it is that wants to be sold.
I suspect it also costs a lot more than a conventional road build.
KillerJim said:
Can anyone explain to me why this can't be a road going engine?
I.e. why if driven on the road (i.e. 1000's of normal driving) would the engine let go so quickly (and what happens?)
The high lift cams and stronger valve springs will have much higher loads and therefore wear quicker at lower rpms. The bearings and cylinder hone can be designed for less friction but a shorter life
Can anyone explain to me why this can't be a road going engine?
I.e. why if driven on the road (i.e. 1000's of normal driving) would the engine let go so quickly (and what happens?)
The high lift cams and stronger valve springs will have much higher loads and therefore wear quicker at lower rpms. The bearings and cylinder hone can be designed for less friction but a shorter life
m4tti said:
Du1point8 said:
you obviously missed the winking smilie and deserve the above for doing so.
Yes I don't currently have a car, Yes I am a technology person so post on PC section, not so much in the gaming one at all.
When the situation changes a saggy is what I want to buy, but can justify leaving it on the street in London without a garage and I can't get one very close to me so hence no car.
I do have a lot of friends with TVRs, but you don't seem to be able to notice the smilie either... well done.
The winking smile isn't really clear as its not in line in the text. I have only just noticed it. Possibly why no one else noticed it.
Not really a personal attack and didn't really hit any nerves. Was more meant in jest. Just thought your post was odd in the way it was presented on a subject your obviously distant from. We'll leave it at that.
Not really a personal attack and didn't really hit any nerves. Was more meant in jest. Just thought your post was odd in the way it was presented on a subject your obviously distant from. We'll leave it at that.
m4tti said:
The winking smile isn't really clear as its not in line in the text. I have only just noticed it. Possibly why no one else noticed it.
Not really a personal attack and didn't really hit any nerves. Was more meant in jest. Just thought your post was odd in the way it was presented on a subject your obviously distant from. We'll leave it at that.
Not big on apologies then Not really a personal attack and didn't really hit any nerves. Was more meant in jest. Just thought your post was odd in the way it was presented on a subject your obviously distant from. We'll leave it at that.
TVR_owner said:
m4tti said:
The winking smile isn't really clear as its not in line in the text. I have only just noticed it. Possibly why no one else noticed it.
Not really a personal attack and didn't really hit any nerves. Was more meant in jest. Just thought your post was odd in the way it was presented on a subject your obviously distant from. We'll leave it at that.
Not big on apologies then Not really a personal attack and didn't really hit any nerves. Was more meant in jest. Just thought your post was odd in the way it was presented on a subject your obviously distant from. We'll leave it at that.
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