Rebuilt Speed Six - by Austec Racing
Discussion
Its back!! My Silver 2000 Tuscan 4.0.
Austec racing have rebuilt my SP6. Here's a brief description of the work, and modifications:-
HEAD
• All new bigger valves, thicker stems.
• New larger diameter guides.
• Three Angle Valve Seats
• New Finger followers
• New Camshafts
• New Springs with less loading
• New lighter stronger spring retainers.
• Refaced, + bumps and lumps removed from ports.
BLOCK
• Studded block
• Re-honed block.
• Balanced rods, and pistons
• Balanced crankshaft flywheel and clutch.
• New bearings.
• New chains.
• Oil-way mods
MISC
• De-cat
• New oil, seals, gaskets etc.
Not to mention: Remove and refit, and mess about with a warranty company, who paid a considerable chunk. (£2500 in fact) My bill was £4090 in total.
I am now running it in, today I have managed to clock up to 340 miles.
Report so far:
Pulling like a train, up to my 3500RPM limit.
Sounds just as it should, (slight sewing machine whirr)and not too bad when its very cold. My oil pressure is huge 90 when cold, settling to 45PSI when we reach 60c oil temp.
I am very sensitive to any changes to engine note now, but nothing to report.
My de-cat was forced upon me by the fact that one had broken up, and with the posibility of parts being sucked into my fresh engine, they were knocked out.
Occasionaly it seems to run a little rich on start up, but for the time being, its probably better to run rich, rather than too lean during my "restrained" period.
Other stuff, I have treated it to new fresh Toyo's for £85 each, and I can bed these in with the new metal bits. Also a sigle DIN sony satnav unit (becker) thats in silver, it suits the layout well. (I need to post this in the Satnav section later)
I have pulsing from my regulator, that I couldnt have expected Austec to notice, and only driving in the dark can I see it in the headlamps flickering. The CD also cuts out now and then, but this is an easy fix, and will deal with it when my replacement arrives from Austec, who are kindly posting me one out.
I think I am going to have a very strong engine here, both in power and reliability, early indications are pleasing!
Thank you Austec.
>> Edited by justinbaker on Saturday 11th February 17:24
Austec racing have rebuilt my SP6. Here's a brief description of the work, and modifications:-
HEAD
• All new bigger valves, thicker stems.
• New larger diameter guides.
• Three Angle Valve Seats
• New Finger followers
• New Camshafts
• New Springs with less loading
• New lighter stronger spring retainers.
• Refaced, + bumps and lumps removed from ports.
BLOCK
• Studded block
• Re-honed block.
• Balanced rods, and pistons
• Balanced crankshaft flywheel and clutch.
• New bearings.
• New chains.
• Oil-way mods
MISC
• De-cat
• New oil, seals, gaskets etc.
Not to mention: Remove and refit, and mess about with a warranty company, who paid a considerable chunk. (£2500 in fact) My bill was £4090 in total.
I am now running it in, today I have managed to clock up to 340 miles.
Report so far:
Pulling like a train, up to my 3500RPM limit.
Sounds just as it should, (slight sewing machine whirr)and not too bad when its very cold. My oil pressure is huge 90 when cold, settling to 45PSI when we reach 60c oil temp.
I am very sensitive to any changes to engine note now, but nothing to report.
My de-cat was forced upon me by the fact that one had broken up, and with the posibility of parts being sucked into my fresh engine, they were knocked out.
Occasionaly it seems to run a little rich on start up, but for the time being, its probably better to run rich, rather than too lean during my "restrained" period.
Other stuff, I have treated it to new fresh Toyo's for £85 each, and I can bed these in with the new metal bits. Also a sigle DIN sony satnav unit (becker) thats in silver, it suits the layout well. (I need to post this in the Satnav section later)
I have pulsing from my regulator, that I couldnt have expected Austec to notice, and only driving in the dark can I see it in the headlamps flickering. The CD also cuts out now and then, but this is an easy fix, and will deal with it when my replacement arrives from Austec, who are kindly posting me one out.
I think I am going to have a very strong engine here, both in power and reliability, early indications are pleasing!
Thank you Austec.
>> Edited by justinbaker on Saturday 11th February 17:24
Excellent! Great to have your Tusc back, after the initial heartaches?
That price for all that work and parts does seem fairly reasonable!
One question, and its a total numpty one, why cant there be a better, more permanent filter or guard in the cats to stop the crap, when it breaks up, going into the engine?
That price for all that work and parts does seem fairly reasonable!
One question, and its a total numpty one, why cant there be a better, more permanent filter or guard in the cats to stop the crap, when it breaks up, going into the engine?
He He Neil - It has a much classier bag over its door now, in fact its lined and has TVR in big letters on the front! 
We will have see about putting it on the dyno,
but count me in for a trip there.
Peter, I think its valve overlap when cranking over, that you have to watch out. (your just down the road, I am in Kettering)
Mark - The pulsing might be OK, I think theres three regulators in our systems it might be one just going a bit soft. Unless its dumping more then 16v into the system then it should be fine. Job for later, while the suns out, get that oil warm mate!
We will have see about putting it on the dyno,
but count me in for a trip there. Peter, I think its valve overlap when cranking over, that you have to watch out. (your just down the road, I am in Kettering)
Mark - The pulsing might be OK, I think theres three regulators in our systems it might be one just going a bit soft. Unless its dumping more then 16v into the system then it should be fine. Job for later, while the suns out, get that oil warm mate!
greenv8s said:
Sounds like a good job well done, but I don't understand the 'bits of cat falling into the engine' thing. The cats are in the exhaust, the gases are blowing the bits away from the engine, surely there's no reason for bits of cat to go back up towards the engine?
Think lifting off throttle at high revs Peter...Vac something or other??
>> Edited by Daftlad on Saturday 11th February 19:54
350matt said:
Correct me if I'm wrong but you've addressed the valve train failure by beefing up the valve stem and guide, reducing the weight of the valvetrain and therefore required spring pressure to try and remove some stress, Where did you source the parts?
Matt
the inlet valves stretch at the waisted section so a thicker higher quality stem would sort that, I assume they've ported the heads to try and reclaim the flow lost to the thicker stem .. then lighten the rest of the train as much as possible to reduce stresses accelerating the valve off it's seat .. we know SP6 rods break at high revs so no need to go massively strong on springs anyway as they're not the limiting factor presumably .. all sounds good from where I'm sitting
Nice to hear that you got your wheels back Justin. I've done 1500 miles since my rebuild and things are getting stronger. If only the roads stayed dry. Justin we should hook up you being in Ketting and all. I'm in Oundle, not far from Peterborough. Kettering side. Should catch up for a hoon and a quick beer
Seems like a pucker job to me, plenty going on there.
I assume most of the parts are of a new/replacement design including the dreaded finger followers
. It'll be very interesting to see whats she's got post running in 
. I assume the spec is not too disimilar to what Pauls already got in his Tamora, which is just north of 400hp AFAIK, good times ahead me thinks 
.
Just waiting to see whats in the pipeline for the AJP8 now
.
I assume most of the parts are of a new/replacement design including the dreaded finger followers
. It'll be very interesting to see whats she's got post running in . I assume the spec is not too disimilar to what Pauls already got in his Tamora, which is just north of 400hp AFAIK, good times ahead me thinks . Just waiting to see whats in the pipeline for the AJP8 now
.Mats said:
Nice to hear that you got your wheels back Justin. I've done 1500 miles since my rebuild and things are getting stronger. If only the roads stayed dry. Justin we should hook up you being in Ketting and all. I'm in Oundle, not far from Peterborough. Kettering side. Should catch up for a hoon and a quick beer
Brilliant Mat, It definately would be good to see what two six cycliders in harmony sound like through oundle town.
Theres some nice roads too. Justin, great news about your car being back up and running! More and more engine builders serving the TVR world, this is excellent news, one day I'm sure us TVR owners will have lots of aftermarket gear/upgrades available off-the-shelf, the market is growing, I hope TVR notice all these indies doing their own work, sourcing their own parts - it shows a loyal market is out there....
Rumour has it that APM down south do Speed 6 rebuilds too now and the chap who left Peninsula and started up in Devon.
Can there really be that much business in the Speed 6 market? Would be great to get numbers from all these indies of how many engines they're having to rebuild every quarter....
Rumour has it that APM down south do Speed 6 rebuilds too now and the chap who left Peninsula and started up in Devon.
Can there really be that much business in the Speed 6 market? Would be great to get numbers from all these indies of how many engines they're having to rebuild every quarter....
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