The Triumph Dolomite Club - Discussion Forum

The Number One Club for owners of Triumph's range of small saloons from the 1960s and 1970s.
It is currently Mon Feb 18, 2019 8:34 pm

All times are UTC




Post new topic  Reply to topic  [ 22 posts ]  Go to page 1 2 Next
Author Message
 Post subject: Hs8's
PostPosted: Sat Nov 23, 2013 5:50 pm 
Offline
TDC Member
User avatar

Joined: Tue Oct 03, 2006 6:10 pm
Posts: 1790
Location: Holland on sea
Anyone know if these are ok for a hs8 sprint conversion ? , i notice they have poppet valves too.


http://www.ebay.co.uk/itm/121221135313? ... 1423.l2649

_________________
1977 Flamenco sprint (VGY NOW TAX AND MOT FREE :D )


Top
   
 Post subject: Re: Hs8's
PostPosted: Sat Nov 23, 2013 10:12 pm 
Offline
TDC Member

Joined: Sun Jul 26, 2009 9:09 pm
Posts: 87
I used a pair of these straight off a Jag years ago but the engine I fitted them to was far from standard.It spluttered quite a lot when pulling out of junctions...............until I pulled out the choke and then it went like a stabbed rat.A rally driving friend of mine was amazed at how quick it was on full choke.They dripped petrol around the alternator which was a bit of a hazard and I got rid of the poppet valve butterfly discs,bought new ones from Minisport in Padiham. You'd need to open up the intake holes in the manifold and the mounting rubbers to take full advantage and get then set up with the right needles.There is a place in Essex specializing in carbs and bits.


www.carburettorspecialists.com




Hope this helps.


Top
   
 Post subject: Re: Hs8's
PostPosted: Sat Nov 23, 2013 10:52 pm 
Offline
TDC Member
User avatar

Joined: Tue Oct 03, 2006 6:10 pm
Posts: 1790
Location: Holland on sea
Thanks Mark, was just toying with the idea, I know the rover hs8's are not recommended because of the vacuum drillings being smaller ( whatever that means :) ).

_________________
1977 Flamenco sprint (VGY NOW TAX AND MOT FREE :D )


Top
   
 Post subject: Re: Hs8's
PostPosted: Sun Nov 24, 2013 11:32 am 
Offline
TDC Member
User avatar

Joined: Sun Sep 08, 2013 2:35 pm
Posts: 702
I was told that the problems with the HS8's off the Rover are the smaller jet size and the restricted piston lift. They are therefore, supposedly, no better than HS6s. There's some info in the TriumphTune performance manual from the 90s.

The problem with, at least some of, the carbs off the Jags/Daimlers is that the front one needs the dashpot and damper shortening to fit under the bonnet. It's hard to see from these pics, but it looks like these aren't modded in that way. I suppose you could bulge the bonnet instead, but that seems a bit drastic.

The HS8s off the Jag fit on a TR7 sprint OK though, which is why I've got a set on a modified manifold in the process of finishing off: just need air filters and they're ready to go. Think I'll put the Solex twin choke side draught 45s I've also got on the dolly, but I might do it the other way round, if I can get the HS8's modded.

Interestingly, demontweeksoutlet on ebay have/had the Pipercrossair air filter back plates for the HS8s about 2/3rds off: I got a pair for £5.99 each inc p&p yesterday. I'll check they fit OK before I spend £70 on the filters. My other option is to drill out a standard airbox back to take the HS8s: I'm not paying that much for K&Ns for the 2" carbs unless I must. But for me, the standard air box is the least best option if maximizing performance is the goal, even with a K&N insert.

_________________
The 16v Slant 4 engine is more fun than the 3.5 V8, because you mostly drive it on the upslope of the torque curve.

Factory 1977 TR7 Sprint FHC VVC 697S (Now all of, but still needs putting together)
B&Y 73 Dolomite Sprint UVB 274M (kids!)
1970 Maroon 13/60 Herald Convertable (wife's fun car).


Top
   
 Post subject: Re: Hs8's
PostPosted: Sun Nov 24, 2013 11:54 am 
Offline
TDC Member
User avatar

Joined: Tue Oct 03, 2006 6:10 pm
Posts: 1790
Location: Holland on sea
Thank's Graham, i used to have a copy of the triumph tune manual but mislaid it, it did contain some useful tips, i suppose if someone still has a copy i could be scanned and put on the wiki as a tuning guide :)

_________________
1977 Flamenco sprint (VGY NOW TAX AND MOT FREE :D )


Top
   
 Post subject: Re: Hs8's
PostPosted: Sun Nov 24, 2013 12:35 pm 
Offline
TDC Member
User avatar

Joined: Sun Sep 08, 2013 2:35 pm
Posts: 702
What's your plan for dealing with the brass pipes for the AED, which go in engine side of the venturis? I've just got some hose of the right dia. and intend to just cross link the carbs.

_________________
The 16v Slant 4 engine is more fun than the 3.5 V8, because you mostly drive it on the upslope of the torque curve.

Factory 1977 TR7 Sprint FHC VVC 697S (Now all of, but still needs putting together)
B&Y 73 Dolomite Sprint UVB 274M (kids!)
1970 Maroon 13/60 Herald Convertable (wife's fun car).


Top
   
 Post subject: Re: Hs8's
PostPosted: Sun Nov 24, 2013 12:44 pm 
Offline
TDC Member
User avatar

Joined: Tue Oct 03, 2006 6:10 pm
Posts: 1790
Location: Holland on sea
At this moment i have no idea as i do not have a set of hs8's yet to make any decisions as to what goes where :) ,i did sell a whole setup with manifold to the guy who's name is not mentioned on here in the early nineties but for the life of me cannot remember the actual set up as i never had it fitted to the car ( it looks like the enrichment / choke arrangement is different on the ebay ones to the standard setup ).

_________________
1977 Flamenco sprint (VGY NOW TAX AND MOT FREE :D )


Top
   
 Post subject: Re: Hs8's
PostPosted: Sun Nov 24, 2013 1:46 pm 
Offline
TDC Member
User avatar

Joined: Sun Sep 08, 2013 2:35 pm
Posts: 702
Image

_________________
The 16v Slant 4 engine is more fun than the 3.5 V8, because you mostly drive it on the upslope of the torque curve.

Factory 1977 TR7 Sprint FHC VVC 697S (Now all of, but still needs putting together)
B&Y 73 Dolomite Sprint UVB 274M (kids!)
1970 Maroon 13/60 Herald Convertable (wife's fun car).


Top
   
 Post subject: Re: Hs8's
PostPosted: Sun Nov 24, 2013 2:54 pm 
Offline
TDC Member
User avatar

Joined: Tue Oct 03, 2006 6:10 pm
Posts: 1790
Location: Holland on sea
Thank's Graham , ive printed that out :)

_________________
1977 Flamenco sprint (VGY NOW TAX AND MOT FREE :D )


Top
   
 Post subject: Re: Hs8's
PostPosted: Sun Nov 24, 2013 3:59 pm 
Offline
TDC Member
User avatar

Joined: Sun Sep 08, 2013 2:35 pm
Posts: 702
No probs. Is there aught you want a scan of while I've got the manual out?

_________________
The 16v Slant 4 engine is more fun than the 3.5 V8, because you mostly drive it on the upslope of the torque curve.

Factory 1977 TR7 Sprint FHC VVC 697S (Now all of, but still needs putting together)
B&Y 73 Dolomite Sprint UVB 274M (kids!)
1970 Maroon 13/60 Herald Convertable (wife's fun car).


Top
   
 Post subject: Re: Hs8's
PostPosted: Sun Nov 24, 2013 4:11 pm 
Offline
TDC Member
User avatar

Joined: Tue Oct 03, 2006 6:10 pm
Posts: 1790
Location: Holland on sea
Nothing else thanks :)

_________________
1977 Flamenco sprint (VGY NOW TAX AND MOT FREE :D )


Top
   
 Post subject: Re: Hs8's
PostPosted: Sun Nov 24, 2013 7:45 pm 
Offline
TDC Member
User avatar

Joined: Thu Oct 06, 2011 12:13 am
Posts: 2609
Location: The continent
Rover ones do have limited lift. They needed only hs6 but jag's had hs8 so rover would also. The same as Triumph. That's why the works sprints had in 1974 48 webers because ford had only 45.

Jeroen

_________________
Classic Kabelboom Company. For all your wiring needs. http://www.classickabelboomcompany.com


Top
   
 Post subject: Re: Hs8's
PostPosted: Sun Nov 24, 2013 8:00 pm 
Offline
TDC Member
User avatar

Joined: Sun Sep 08, 2013 2:35 pm
Posts: 702
Which work's Doly Sprints had the webbers? I know the group four 16V TR7s had Webber 48s in the 76-9 rally seasons, but I thought for group one, which the british touring cars were at the time (74-5), the dolomites had the HS6s and group one and a half cars had the HS8s.

_________________
The 16v Slant 4 engine is more fun than the 3.5 V8, because you mostly drive it on the upslope of the torque curve.

Factory 1977 TR7 Sprint FHC VVC 697S (Now all of, but still needs putting together)
B&Y 73 Dolomite Sprint UVB 274M (kids!)
1970 Maroon 13/60 Herald Convertable (wife's fun car).


Top
   
 Post subject: Re: Hs8's
PostPosted: Mon Nov 25, 2013 5:14 pm 
Offline
TDC Member

Joined: Tue Jan 10, 2012 12:39 am
Posts: 330
I have also acquired a pair of Jaguar HS8's to go on my Sprint engine and am just going through the process of working out the best way to connect them up with a choke etc etc.
Does anyone have a good picture of a set installed on a Sprint?

Mine look the same as the ones on Ebay, there are a couple of take off ports to block and they originally had the AED device (kind of an auto choke) on the Jags but I will obviously use a manual cable choke. I have some spare HS6's so can rob them for linkage parts as required. The plan is to get a rebuild kit from Turner Carbs so will be picking their brains for ideas as well.

Anyone else out there who has done this and can add any good tips please?

_________________
Russ Cooper
Dursley
UK


Top
   
 Post subject: Re: Hs8's
PostPosted: Mon Nov 25, 2013 9:54 pm 
Offline
TDC Member
User avatar

Joined: Sun Sep 08, 2013 2:35 pm
Posts: 702
Image

_________________
The 16v Slant 4 engine is more fun than the 3.5 V8, because you mostly drive it on the upslope of the torque curve.

Factory 1977 TR7 Sprint FHC VVC 697S (Now all of, but still needs putting together)
B&Y 73 Dolomite Sprint UVB 274M (kids!)
1970 Maroon 13/60 Herald Convertable (wife's fun car).


Top
   
Display posts from previous:  Sort by  
Post new topic  Reply to topic  [ 22 posts ]  Go to page 1 2 Next

All times are UTC


Who is online

Users browsing this forum: Awaiting Repair, Bing [Bot], Caszhman and 15 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
Powered by phpBB® Forum Software © phpBB Limited