'Ultimate' road S6 build shopping list?
Discussion
Awaiting the paperwork needed to be able to register the project Tuscan (cat C salvage) at some point, I'm putting together a shopping list for the engine build.
I've pretty much decided against an LS3 swap (as long as the original block doesn't turn out to be scrap, anyway) but that said, I'm not ignorant of the strong points of the LSx compared to the S6.
Hence, apart from the obvious one - reliablity - I also want
Discounting the FFF head for a moment, the design choices would come down to:
I've pretty much decided against an LS3 swap (as long as the original block doesn't turn out to be scrap, anyway) but that said, I'm not ignorant of the strong points of the LSx compared to the S6.
Hence, apart from the obvious one - reliablity - I also want
- a fatter torque curve and easy driveability in traffic
- razor sharp, inertia free throttle response and linearity
Discounting the FFF head for a moment, the design choices would come down to:
- RG 'ultimate' finger followers vs latest spec TVR Power followers
- RG simplex timing chain set up vs OEM duplex set up
- RG Helix clutch vs. TVR Power AP clutch
- 4.0 litre (OE pistons & crank with RG H-beam rods) vs. Power 4.3 litre kit vs. Power 4.5 litre kit vs. bespoke, oversize pistons and liners (and H-beam rods on 4.0 crank for near 4.2 litres capacity
- RG lightweight flywheel vs. Power lightened flywheel
- OE clutch slave cylinder vs. Raceproved slave cylinder
go for a well done 3.7 instead of bigger capacity. will just cut you down in revs and makes less fun.
i can tell that as having a 4.3 at the moment and before a 3.6. 4.3 feels like a lazy granny compared to the
3.6 in terms of revs. not to mention of course you will loose top end revs when you go large. don´t know how
high a 4.5 can rev but having seen the dyno curve on my 4.3 won´t make sense going above 6500 rpm. depends of
course on what you want to have but i dont use it on regular basis. if i have fun i do if not i take the chimaera
that is the less extreme car.
when i could chose again would go for a well done 3.7 and rev the hell out of it. of course costs won´t be only
the engine. different exhaust ecu etc. etc. also get some hot cams in there....
if the car should be easy drivable in traffic and around town there i guess you will be happy with a 4.3
i can tell that as having a 4.3 at the moment and before a 3.6. 4.3 feels like a lazy granny compared to the
3.6 in terms of revs. not to mention of course you will loose top end revs when you go large. don´t know how
high a 4.5 can rev but having seen the dyno curve on my 4.3 won´t make sense going above 6500 rpm. depends of
course on what you want to have but i dont use it on regular basis. if i have fun i do if not i take the chimaera
that is the less extreme car.
when i could chose again would go for a well done 3.7 and rev the hell out of it. of course costs won´t be only
the engine. different exhaust ecu etc. etc. also get some hot cams in there....
if the car should be easy drivable in traffic and around town there i guess you will be happy with a 4.3
Edited by gacksen on Wednesday 5th November 11:06
m4tti said:
Helix clutch surely.. you can obtain all the parts separately and rebuild it saving in the long term.
Been considering this item... looks like a significant saving in the short term too, unless I missed something. + the lightweight clutch. Anyone have the helix and can comment?I'm put off the fff head because all the dyno plots show a big dip at low revs... I imagine that would annoy me. Keen to hear from others if its actually felt.
SergSC said:
Been considering this item... looks like a significant saving in the short term too, unless I missed something. + the lightweight clutch. Anyone have the helix and can comment?
I'm put off the fff head because all the dyno plots show a big dip at low revs... I imagine that would annoy me. Keen to hear from others if its actually felt.
I have both the FFF and the helix clutch. The clutch is cracking and is an awesome deal. See my profile for a link to my build thread.I'm put off the fff head because all the dyno plots show a big dip at low revs... I imagine that would annoy me. Keen to hear from others if its actually felt.
At around 5.5k rpm the FFF comes alive. Its not only the power its also the smoothness of the engine.. it worlds apart from the original design.
O/T Andy, as soon as we can start dismantling the thing (we need to leave it intact to show it to the Dutch road autorities as salvage with the correct paper work before we can rebuild and subsequently have it tested and registered here) I'll be sending the throttle bodies down to you for having the bearing upgrade performed 
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