New Camshaft Advice/Recommendation’s
Discussion
Hi,
I am looking for advice on which Camshaft I should get fitted and by who (bearing in mind I am in Dorset)?
I am mainly looking for drivability and smooth idle…
I have now had 2 Dyno setups with Mark Adams (cc’ed in) and Brian at Mech Repairs the first following an full induction and 2nd section Exhaust ACT upgrade that included Marks Chip, the second following the fitting of ACT Manifolds as we thought that the dropping off of the power indicated blocked Cats.
At the time both Mark and Brian did point out that this only indicated blocked Cats, but the issue could be Cam, Valves, Pistons so more work would be required to fully diagnose!
So it was the excuse I was looking for I guess to complete the new ACT Exhaust system by fitting the manifolds…
Re-ran and setup the car (for 6 hours) on the Dyno again with both Mark and Brian, and whilst the drop off in Power is still present, the sound is awesome … :-)
http://www.youtube.com/watch?v=SZ7eR9WBCto
However I am now intrigued as to why I have the power drop off issue and of course lack of power after everything that has been done, check and tested by Mark, please see attached:
Happy to date with everything I have had done but I guess before I go any further I should have a Leak Down Test and Compression Test to see if it is a Piston/Ring, Camshaft and or Valve Issue!?
Does anyone know of a reliable/competent garage to carry these test out for me?
I say reliable/competent garage as I have had some work done ‘locally’ by a so called TVR expert and the quality and reliability of the work was shocking…
Thank you in advance for any help and advice…
Kind regards
Steve
I am looking for advice on which Camshaft I should get fitted and by who (bearing in mind I am in Dorset)?
I am mainly looking for drivability and smooth idle…
I have now had 2 Dyno setups with Mark Adams (cc’ed in) and Brian at Mech Repairs the first following an full induction and 2nd section Exhaust ACT upgrade that included Marks Chip, the second following the fitting of ACT Manifolds as we thought that the dropping off of the power indicated blocked Cats.
At the time both Mark and Brian did point out that this only indicated blocked Cats, but the issue could be Cam, Valves, Pistons so more work would be required to fully diagnose!
So it was the excuse I was looking for I guess to complete the new ACT Exhaust system by fitting the manifolds…
Re-ran and setup the car (for 6 hours) on the Dyno again with both Mark and Brian, and whilst the drop off in Power is still present, the sound is awesome … :-)
http://www.youtube.com/watch?v=SZ7eR9WBCto
However I am now intrigued as to why I have the power drop off issue and of course lack of power after everything that has been done, check and tested by Mark, please see attached:
Happy to date with everything I have had done but I guess before I go any further I should have a Leak Down Test and Compression Test to see if it is a Piston/Ring, Camshaft and or Valve Issue!?
Does anyone know of a reliable/competent garage to carry these test out for me?
I say reliable/competent garage as I have had some work done ‘locally’ by a so called TVR expert and the quality and reliability of the work was shocking…
Thank you in advance for any help and advice…
Kind regards
Steve
V8Bart said:
Hi Eddie, you say stealth cam, did you have pocketed pistons? And remap?
Try V8 Developments, Spalding, Lincs. They make and supply. It will be my next cam. A good all rounder by all recommendations. If I can find it. Will send a table of all cams compared. Can't find. Somebody out there has and knows it. Please post. Thanks.http://www.pistonheads.com/gassing/topic.asp?t=826...
Edited by EGB on Tuesday 10th July 21:13
V8Bart said:
Will send a table of all cams compared. Can't find. Somebody out there has and knows it. Please post. Thanks.
http://www.pistonheads.com/gassing/topic.asp?t=826...
BTW the cam list you are referring to (although not present in the post you have linked-to) is not complete - misses out the main competitor cam to the Stealth, TVR Power's 885 cam... http://www.pistonheads.com/gassing/topic.asp?t=826...
Bit of an omission really, as this is the current OE replacement cam - and how can you judge the others without the OE cam as a "control" baseline...?
Just my 2p,
Dom
Sorry - didn't mean to come over aggressively if that was the case 
The 885 is the current Power offering, different to the original Taraka incarnation which required adjustable pushrods (and solid lifters?) - now runs on hydraulic lifters etc.
I think it's brilliant that Rob is forging ahead with development of the Stealth, gives the buyer a wider choice of high-quality cams (and driving characteristics) for their RV8.
Just thing that the table needs that addition to be a completely rounded comparative reference - as most people here will probably either be running TVR Power or V8 Dev set-ups, and will want to see how each compare to the other...
Dom
The 885 is the current Power offering, different to the original Taraka incarnation which required adjustable pushrods (and solid lifters?) - now runs on hydraulic lifters etc.
I think it's brilliant that Rob is forging ahead with development of the Stealth, gives the buyer a wider choice of high-quality cams (and driving characteristics) for their RV8.
Just thing that the table needs that addition to be a completely rounded comparative reference - as most people here will probably either be running TVR Power or V8 Dev set-ups, and will want to see how each compare to the other...
Dom
Hi Steve,
That looks like a cracking setup you have there with the MA Chip, ACT Twin CF Plenum, ACT tuned manifolds, Bosch AFM and injectors etc.
Was that a duff run on the screen or is 186BHP one of the better runs? 186BHP at the wheels is only about 230 - 240BHP at the fly which is very down on power for a 500.
It does sound lovely in the video what rear exhaust section do you have?
That drop of power is strange, was Mark Adams not able to give you some clues as to what it might be?
Matthew
That looks like a cracking setup you have there with the MA Chip, ACT Twin CF Plenum, ACT tuned manifolds, Bosch AFM and injectors etc.
Was that a duff run on the screen or is 186BHP one of the better runs? 186BHP at the wheels is only about 230 - 240BHP at the fly which is very down on power for a 500.
It does sound lovely in the video what rear exhaust section do you have?
That drop of power is strange, was Mark Adams not able to give you some clues as to what it might be?
Matthew
EGB said:
Dom just my 2p. TVR Power don't appear to list the 885 on their web site. I can't find it.
Just my 2p......http://www.tvrpower.co.uk/store/slug/v8-camshaft-4...
I remain a very happy Taraka / 885 customer from Power. I posted on my rebuild towards the end of last year and would say the car genuinely feels better with a few miles on the clock. There's a dyno readout in the post so you can see how it looks.
As many have said before, cam choice is personal and encourages passionate debate, some of it, historically, rude and unacceptable to the point it put me off even looking at this site. 885 and Stealth were my final two to choose from. Your choice of balance between power and torque will depend on how you expect to use the car.
Sounds like you've been given a contact locally who should know his stuff on engine build. Power or V8d and a couple of others will all build you a great engine. My experience was that as I wanted a rebuild, the delta cost for Taraka was circa £700. That gave significant gains and was, for me, as someone not competent to rebuild their engine, a bargain. As you've already got quite a few of the shiny bolt on bits on your engine I'm sure there's another beast waiting to join the 300+ club..... Although perhaps that' benchmark is by now 350, ( not 349 ).
As many have said before, cam choice is personal and encourages passionate debate, some of it, historically, rude and unacceptable to the point it put me off even looking at this site. 885 and Stealth were my final two to choose from. Your choice of balance between power and torque will depend on how you expect to use the car.
Sounds like you've been given a contact locally who should know his stuff on engine build. Power or V8d and a couple of others will all build you a great engine. My experience was that as I wanted a rebuild, the delta cost for Taraka was circa £700. That gave significant gains and was, for me, as someone not competent to rebuild their engine, a bargain. As you've already got quite a few of the shiny bolt on bits on your engine I'm sure there's another beast waiting to join the 300+ club..... Although perhaps that' benchmark is by now 350, ( not 349 ).
MPoxon said:
EGB said:
Dom just my 2p. TVR Power don't appear to list the 885 on their web site. I can't find it.
Just my 2p......http://www.tvrpower.co.uk/store/slug/v8-camshaft-4...
Hi,
Following a recommendation on Piston Heads (Thank you Dom) I dropped the car off to a company called Dorset Sports Cars (http://www.dorsetsportscars.co.uk) who 'specialise' in TVR’s, as I have heard that before I was more than a little cynical…
However so far so good, very knowledgeable and experienced in most things TVR and in particular V8’s and where they feel appropriate work closely with TVR Power.
Before they took a look at the car we sat down for at least an hour to run through the problems with the car and the history to date.
They were very sensitive with regards to my budget and we agreed 2 days fixed price to run through a long agreed list of tests and checks to help diagnose the problems.
A list of items to be checked were emailed to me along with the confirmation of a fixed price.
A few days later and they called me to see when I was free to run through what they have found, and indeed show me…
They identified a number of minor problems which were fixed during the allotted time and the a few major problems identified were:
An issue with high oil pressure, which masked a number of other issues which was confirmed with a mechanical gauge fitted at sender, on removal of the pump they showed me a ‘mod’ that had been done if the past which resulted in the high oil pressure reading
Worn Big-end Shells
Most importantly all of the Cam Lobes were missing at least 20% – 50%, off all the cam lobes and the followers very badly dished and quite a few of the Cam Lobes were almost totally gone…
After spending an hour or so talking through the options we agreed that based on the number of miles I do and my budget that we would replace the camshaft and all ancillary running gear, remove the heads & inspect, replace the Big-end Shells
Obviously there is a balance between getting the engine out and doing everything else, but I can’t justify it at the moment, maybe something for the future, but there was no pressure from them with regards to what to do, just very considered advice…
Once the heads were off they thought that the Valves & Valve Guide wear were good enough to just re-lap in the valves and start to reassemble.
I can’t wait to get the car back and drive it!
I am in no way connected to Dorset Sports Cars, I just thought I would share my experience just in case there are any other TVR owners in Dorset looking for someone to take a look at their car…
Regards
Steve
Following a recommendation on Piston Heads (Thank you Dom) I dropped the car off to a company called Dorset Sports Cars (http://www.dorsetsportscars.co.uk) who 'specialise' in TVR’s, as I have heard that before I was more than a little cynical…
However so far so good, very knowledgeable and experienced in most things TVR and in particular V8’s and where they feel appropriate work closely with TVR Power.
Before they took a look at the car we sat down for at least an hour to run through the problems with the car and the history to date.
They were very sensitive with regards to my budget and we agreed 2 days fixed price to run through a long agreed list of tests and checks to help diagnose the problems.
A list of items to be checked were emailed to me along with the confirmation of a fixed price.
A few days later and they called me to see when I was free to run through what they have found, and indeed show me…
They identified a number of minor problems which were fixed during the allotted time and the a few major problems identified were:
An issue with high oil pressure, which masked a number of other issues which was confirmed with a mechanical gauge fitted at sender, on removal of the pump they showed me a ‘mod’ that had been done if the past which resulted in the high oil pressure reading
Worn Big-end Shells
Most importantly all of the Cam Lobes were missing at least 20% – 50%, off all the cam lobes and the followers very badly dished and quite a few of the Cam Lobes were almost totally gone…
After spending an hour or so talking through the options we agreed that based on the number of miles I do and my budget that we would replace the camshaft and all ancillary running gear, remove the heads & inspect, replace the Big-end Shells
Obviously there is a balance between getting the engine out and doing everything else, but I can’t justify it at the moment, maybe something for the future, but there was no pressure from them with regards to what to do, just very considered advice…
Once the heads were off they thought that the Valves & Valve Guide wear were good enough to just re-lap in the valves and start to reassemble.
I can’t wait to get the car back and drive it!
I am in no way connected to Dorset Sports Cars, I just thought I would share my experience just in case there are any other TVR owners in Dorset looking for someone to take a look at their car…
Regards
Steve
Good choice. I reckon you will blown away by the difference once it is fitted.
It would also be worth once funds allow to get Mark Adams back to map it all up again. With that cam, your new injectors, AFM, Tornado EPROM and CF plenum, exhaust etc once mapped up you should have a really nice high
performance and drivable car.
Let us know how you get on.
It would also be worth once funds allow to get Mark Adams back to map it all up again. With that cam, your new injectors, AFM, Tornado EPROM and CF plenum, exhaust etc once mapped up you should have a really nice high
performance and drivable car.
Let us know how you get on.
Gassing Station | Griffith | Top of Page | What's New | My Stuff