InfinityJon Posted November 5, 2018 Report Share Posted November 5, 2018 Hi, Just about to take delivery of a US spec with overdrive TR6 1976 with 58K on the clock. My question is knowing how down powered the engine is, What are my options to putting the fun back in the engine? Happy to have double/triple carbs or convert to PI. What are my options, what are the associated costs and can I get it back or beyond the magic 150 BHP. Who is good to talk to? Other options are an engine swap. Any help Quote Link to post Share on other sites
Tom Boyd Posted November 5, 2018 Report Share Posted November 5, 2018 Hi, Cam swap, head change/work, pair SU's/set Weber's/injection, extractor manifold will see you back on track Cam & followers around £300 (for new cam not re-profiled) Pair SU's with manifold, linkage etc £1200 (new/recon) Triple weber set up £1500 Convert to injection £2000 Head work £600 Exhaust manifold £400 Plus fitting ........ Parts prices ish & + VAT Tom Quote Link to post Share on other sites
Mike C Posted November 5, 2018 Report Share Posted November 5, 2018 Or look around for a supercharger . Quote Link to post Share on other sites
Tim D. Posted November 5, 2018 Report Share Posted November 5, 2018 Rare beasts superchargers. Had almost given up hope before I found mine ! Good fun to have though. Quote Link to post Share on other sites
Tom Fremont Posted November 5, 2018 Report Share Posted November 5, 2018 2 hours ago, Tom Boyd said: Hi, Cam swap, head change/work, set Webers, extractor manifold will see you back on track Cam & followers around £300 (for new cam not re-profiled) Triple weber set up £1500 Head work £600 Exhaust manifold £400 Plus fitting ........ Parts prices ish & + VAT Tom Above recipe [ edited for simplicity ] the way to go hands down. Unmatched reliability while preserving vintage cachet, all the "150 " P.I. performance and more. Been running this on my '250s since '96 and over 130,000 trouble free, blissful miles. TR5/6 nirvana! Nada lotta money, really. Cheers, Tom ( also! ) Quote Link to post Share on other sites
astontr6 Posted November 7, 2018 Report Share Posted November 7, 2018 On 11/5/2018 at 6:18 PM, Tom Boyd said: Hi, Cam swap, head change/work, pair SU's/set Weber's/injection, extractor manifold will see you back on track Cam & followers around £300 (for new cam not re-profiled) Pair SU's with manifold, linkage etc £1200 (new/recon) Triple weber set up £1500 Convert to injection £2000 Head work £600 Exhaust manifold £400 Plus fitting ........ Parts prices ish & + VAT Tom The above list would cover a good power increase but please remember that the original CP PI's were never 150 BHP more like 135 to 137 BHP .Year's ago I watched a CP car on a rolling road being tested and the owner was very upset that his car was 15 BHP short of 150! If it was me I would go for the triple Weber or triple SU set up. But I do not know what the power difference is between the two, others on this forum can probably tell us. Lastly I would also go for a lighten & fully balanced bottom end, this is based on my own experience of my own car. Triumph engines are known to be, not very good in this area. Bruce. Quote Link to post Share on other sites
Tom Boyd Posted November 7, 2018 Report Share Posted November 7, 2018 Agreed regarding the balancing & a lightened flywheel if the engine is being fully stripped & out the car. If you start with a bare block, get it line bored & fit cam bearings. Bigger bore will help with the grunt. BHP figures are great for the pub but it's the torque that matters Tom Quote Link to post Share on other sites
JochemsTR Posted November 7, 2018 Report Share Posted November 7, 2018 (edited) Anything below 150 BHP can be done with a new cam and tuned head. Even Carburators can get up there. Anything beyond 150 BHP costs. Block bored to 2.7L, 290-300 Cam, CR 10:1, Head Modified and ideally EFI. It just back to basics, what is it what you want and to spend. Cruising, Fast Road, Race....All mods start with the engine. Just answer this: Which car ist faster? Car A: 200 BHP and 100 Nm Car B: 100 BHP and 200 Nm Jochem Edited November 7, 2018 by JochemsTR Quote Link to post Share on other sites
iain Posted November 7, 2018 Report Share Posted November 7, 2018 (edited) Jochem I like option b) its what I have in my 3A ...at the rear wheels as recently set up on Revington RR Iain Edited November 7, 2018 by iain Quote Link to post Share on other sites
Peter Cobbold Posted November 7, 2018 Report Share Posted November 7, 2018 Ideal for supercharging as it is. But Moss discontinued the kit for the 6. However the blower itself, an Eaton M62, is easily availablle and cheap s/hand. Bulding it onto the engine needs pulleys, brackets and ducting and a 2"SU. No TR specialist as far as I know does this. But well within capabilities of a modest engineering workshop . Peter Quote Link to post Share on other sites
stuart Posted November 7, 2018 Report Share Posted November 7, 2018 4 hours ago, Tom Boyd said: Agreed regarding the balancing & a lightened flywheel if the engine is being fully stripped & out the car. If you start with a bare block, get it line bored & fit cam bearings. Bigger bore will help with the grunt. BHP figures are great for the pub but it's the torque that matters Tom Horsepower is how fast you hit the tree, Torque is how far you moved the tree. Stuart. Quote Link to post Share on other sites
Ben's wife Posted November 7, 2018 Report Share Posted November 7, 2018 1 hour ago, stuart said: Horsepower is how fast you hit the tree, Torque is how far you moved the tree. Stuart. Quote Link to post Share on other sites
rcreweread Posted November 7, 2018 Report Share Posted November 7, 2018 Or similarly as someone recently said to me: "Don’t they say that you sell a car bragging horsepower but drive it on torque ?" Cheers Rich Quote Link to post Share on other sites
Tim D. Posted November 7, 2018 Report Share Posted November 7, 2018 Makes me happy.. superchargers specialise in torque. Quote Link to post Share on other sites
Peter Cobbold Posted November 7, 2018 Report Share Posted November 7, 2018 5 minutes ago, Tim D. said: Makes me happy.. superchargers specialise in torque. Me too. Like having a couple of extra cylinders. Quote Link to post Share on other sites
Dave McDonald Posted November 7, 2018 Report Share Posted November 7, 2018 On 11/5/2018 at 9:18 PM, Tom Fremont said: Above recipe [ edited for simplicity ] the way to go hands down. Unmatched reliability while preserving vintage cachet, all the "150 " P.I. performance and more. Been running this on my '250s since '96 and over 130,000 trouble free, blissful miles. TR5/6 nirvana! Nada lotta money, really. Cheers, Tom ( also! ) Tom, How on earth do you manage to keep that engine bay so cleeeeeeean? do you take it to bed at night? I take my hat off to you. Dave McD Quote Link to post Share on other sites
Tom Fremont Posted November 7, 2018 Report Share Posted November 7, 2018 Thanks, Dave - that's the show car which only gets 500-600 miles per year ( up to 6000 now ). The driver's is a bit gnarly by comparison ( below ) but gets 5000+ miles / year ( 74K since its makeover in '96 by the previous owner ). It's got triple Webers too but only the humble CP cam so circa 150 BHP on a good day. Cheers, Tom Quote Link to post Share on other sites
heckler Posted November 7, 2018 Report Share Posted November 7, 2018 I see you have a choke cable Tom . Do you ever use it . Never connected it to mine , just a few pumps of the throttle and it starts fine. chris Quote Link to post Share on other sites
Tim D. Posted November 8, 2018 Report Share Posted November 8, 2018 Had twin Webbers on my first spitifire and my lotus Elan and they are fun. Good noise, but hard to optimise for that last 5%. Mind you... Most things are. Tim Quote Link to post Share on other sites
InfinityJon Posted December 10, 2018 Author Report Share Posted December 10, 2018 On 11/7/2018 at 3:17 PM, Peter Cobbold said: Ideal for supercharging as it is. But Moss discontinued the kit for the 6. However the blower itself, an Eaton M62, is easily availablle and cheap s/hand. Bulding it onto the engine needs pulleys, brackets and ducting and a 2"SU. No TR specialist as far as I know does this. But well within capabilities of a modest engineering workshop . Peter Is this the same supercharger that’s on a merc slk 230? Think this may be the way to go. Quote Link to post Share on other sites
Mike C Posted December 11, 2018 Report Share Posted December 11, 2018 (edited) 6 hours ago, InfinityJon said: Is this the same supercharger that’s on a merc slk 230? Think this may be the way to go. I have a 1998 SLK fitted with an Eaton M62- one of the early ones with a supercharger clutch. Didn't know this was the blower Moss used. I can highly recommend the M62 as a bit of kit, tough, reliable for over at least 100,000miles and you can get things like lube replacement kits, rebuild kits and various pulleys. There's a lot about the M62 supercharger on this forum: https://www.benzworld.org/forums/r170-slk-class/https://www.benzworld.org/forums/r170-slk-class/ Edited December 11, 2018 by Mike C Quote Link to post Share on other sites
PodOne Posted December 11, 2018 Report Share Posted December 11, 2018 All this talk of superchargers got me thinking if anyone has fitted a Turbo with a modern ecu and EFI. Whats the max boost the std internals can take and how much torque will the drive line handle reliably. Anyway before you do anything over stock I be thinking about upgrading the brakes and suspension. M62 widely used in MX5 world as the motors were designed for the 323 Turbo so will take boost well. Cosworth did a kit (Moss) by lots of DIY creations using the M62 Quote Link to post Share on other sites
InfinityJon Posted December 11, 2018 Author Report Share Posted December 11, 2018 Ok. Going to go for a M62 setup. That was easy..... right who do I speak to to get a plan of action? I can make most of the components and rebuild what’s necessary but don’t know much about the nitty gritty of conversions. The car is a CF us spec carb 1976 model. It has OD and has only 58k on the clock. It’s all coming out and will be rebuilt. Has anyone got a link to a person who has put a S/C on a carb model TR6 I can message. Cheers. Quote Link to post Share on other sites
Mike C Posted December 12, 2018 Report Share Posted December 12, 2018 (edited) Here's a bloke that's fitted a M62 to a US TR6: http://www.pattonmachine.com/tr6/schrgr3.htm But there's a lot of supercharging expertise amongst the members of this forum. Edited December 12, 2018 by Mike C Quote Link to post Share on other sites
Hamish Posted December 12, 2018 Report Share Posted December 12, 2018 16 minutes ago, Mike C said: But there's a lot of supercharging expertise amongst the members of this forum. Unfortunately one of the main chaps has gone to sideways. I’m thinking of PeterC. But there is soooo much knowledge here someone will be along shortly to help. H Quote Link to post Share on other sites
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.