02GF74
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| posted on 6/10/06 at 10:11 AM |
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TBs on a rover v8
anyone using or know of a rover v8 using bike Throttle bodies?
interested in seeing some photos & info.
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mark chandler
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| posted on 6/10/06 at 10:24 AM |
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Closest thing I have seen in the flesh is SU boxer manifold with the carbs gutted and injectors added in the manifold pipes.
Looked pretty pants to be honest.
I have seen pictures of the EFI manifold having the tube plate modified for slides and trumpets on top, lots of effort here and looked more
effective.
For myself I made a twin plenum (similar to a factory jobby) that was pretty effective and ran with megasquirt so no flappy boxes or hotwire
restrictions.
Regards Mark
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stevebubs
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| posted on 6/10/06 at 10:35 AM |
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Not RV8 but Cyclone...
 
Cyclone V8
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02GF74
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| posted on 6/10/06 at 10:37 AM |
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I knew I saw them recently - a quick search found the place:
linky
re: ^^^^ what's a cyclone?
[Edited on 6/10/06 by 02GF74]
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Schrodinger
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| posted on 6/10/06 at 11:01 AM |
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A cyclone is a VERY expensive V8 based on a bike engine costs of the order of 15k IIRC needs to be rebuilt regularly as its a race engine.
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stevebubs
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| posted on 6/10/06 at 11:16 AM |
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quote:
Originally posted by Schrodinger
A cyclone is a VERY expensive V8 based on a bike engine costs of the order of 15k IIRC needs to be rebuilt regularly as its a race engine.
True but the princple for mounting ITBs is the same...wasn't suggesting he threw out the RV8.
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02GF74
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| posted on 6/10/06 at 11:45 AM |
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quote:
Originally posted by Schrodinger
A cyclone is a VERY expensive V8 based on a bike engine costs of the order of 15k IIRC needs to be rebuilt regularly as its a race engine.
wondered what it was - has a heath robinson look to it.
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Project7
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| posted on 6/10/06 at 04:32 PM |
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This site has details of one such install - I believe the owner is also one of the people responsible for the megasquirt extra code.
http://www.extraefi.co.uk/cobra/accobra.htm
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piddy
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| posted on 6/10/06 at 04:36 PM |
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I've seen a Cobra on one of the sites I've visited.
It was running on Mega Squirt fitted with a V8 and throttle bodies. also video of it running.
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froggy
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| posted on 6/10/06 at 05:03 PM |
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r1 carbs on a 4.0 by bogg bros. i was going down that route but have gone for single turbo and msns. carbs and two pumps cost me £200 and the boggs
manifold is £600 including the carb mods and a dyno run tb,s will de at least double that
 
Rescued attachment CIMG0010.JPG
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ceebmoj
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| posted on 8/10/06 at 09:13 AM |
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hi all,
if there are a number of pepol intrested in this route I could get a group buy of 10 - 12 mm ally plates laser \ CNC cut to make inlet manifolds
with.
Blake
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wilkingj
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| posted on 8/10/06 at 10:08 AM |
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I could well be interested in this.
I have Weber 500 on at the moment, and am thinking of Megasquirt and T/B's.
A lot depends on the price. I would not want to pay £600 for a flat plate with some pipe welded to it. Thats crazy money (Bogg Bros??)
I have Emailed off for the costs of the Altis T/B Manifolds. I also wonder if its worth buying a set and cloning them. Not strictly ethical, but would
be a good engineering project as they dont look very complicated. My only problem is I cant weld very well, Let alone in Ally 
1. The point of a journey is not to arrive.
2. Never take life seriously. Nobody gets out alive anyway.
Best Regards
Geoff
http://www.v8viento.co.uk
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ceebmoj
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| posted on 8/10/06 at 02:12 PM |
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I agree that 600 for a set is steep witch is why I was thinking of getting the manifold plates machined locally from ally as I am sure I could get
them done for a very competitive price. That would then leave people to sort out welding on there own pipes for what ever TBs they wanted. Or I could
investigate complete inlet manifold construction for one or other TB set up. The other option that I could investigate is having them made from
Stainless steal as I know a very good local stanles fabricator.
I guess it’s just a matter of what people want and how many people want as the more people involved the better the price for all of us.
we would also need somthing like thi as well to house the thermostate
http://www.altiss.com/ShowImage.php?ImageFolder=ComponentsPage&Image=14
Blake
[Edited on 8/10/06 by ceebmoj]
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wilkingj
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| posted on 10/10/06 at 04:34 PM |
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I spoke to Altiss today. The price is due to the "difficulty" around the two centre ports. ie the shape / fabrication and welding it all
up.
Uses Honda CBR600 Throttle bodies (38mm Venturi)
Altiss are £600 just for the manifold.
Bogg Bros do an Ally manifold for a RV8 using Honda blackbird bodies (42mm venturi) £380 inc vat just for the manifold.
Still expensive, but not so bad.
I read today that 42mm Venturi's were like having 48mm Webers, and probably a bit big for road use on a RV8. However, I have not seem any more
evidence to support this.
Both helpful, people at the firms. Anyone know of another manifold Supplier?
1. The point of a journey is not to arrive.
2. Never take life seriously. Nobody gets out alive anyway.
Best Regards
Geoff
http://www.v8viento.co.uk
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ceebmoj
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| posted on 10/10/06 at 05:34 PM |
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I whent to go and get a price for two manifolds from the fabricators I know yester day however thay are buisssy I left drawings thay said that would
phone me back and give me a ball park figurer latter in the weak.
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Uphill Racer
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| posted on 12/10/06 at 11:23 PM |
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Hi guys, u cant relate size with performance, as any girl wil tell u.....lol.
Carbs need airflow to suck................injection atomizes fuel at all air speeds. Have 8 injectors on my 1100 ZZR. Home made using DTA ECU
http://i72.photobucket.com/albums/i187/uphill-racer/INJECTION1.jpg
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gazza285
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| posted on 15/10/06 at 03:08 AM |
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quote:
Originally posted by wilkingj
I read today that 42mm Venturi's were like having 48mm Webers, and probably a bit big for road use on a RV8. However, I have not seem any more
evidence to support this.
Look at it in terms of individual cylinders. A tuned 2.1 Pinto runs well on 36mm venturi 45 Webers at 8000rpm. Each cylinder is 525cc.
A 4.2 is how many cc per cylinder? And at what revs?
DO NOT PUT ON KNOB OR BOLLOCKS!
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wilkingj
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| posted on 15/10/06 at 07:26 AM |
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437.5cc per pot x 8 pots. Rover v8.
6000 rpm max.
I did see a calculator on the web somewhere but like a twat, I didnt bookmark it and cant find it again!.
1. The point of a journey is not to arrive.
2. Never take life seriously. Nobody gets out alive anyway.
Best Regards
Geoff
http://www.v8viento.co.uk
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wilkingj
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| posted on 19/10/06 at 06:09 AM |
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ceebmoj Did you get any where with a price for the laser cut plates?
1. The point of a journey is not to arrive.
2. Never take life seriously. Nobody gets out alive anyway.
Best Regards
Geoff
http://www.v8viento.co.uk
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Schrodinger
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| posted on 19/10/06 at 09:20 AM |
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Anybody seen this?
http://cgi.ebay.co.uk/Rover-v8-idependant-throttle-bodies-jenvey-tvr-sd1_W0QQitemZ330040445528QQihZ014QQcategoryZ72205QQssPageNameZWDVWQQrdZ1QQcmdZVie
wItem
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wilkingj
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| posted on 19/10/06 at 05:05 PM |
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Yes.. Spoken to him, and its still too expensive.
£50 worth for the bodies, and its an Altiss manifold (£600).
He has reduced the price, but tis too much for me. You still need Pumps swirl pot filters, pressure regulator, and ECU..
He did say its good, but is going Supercharged to get low torque and mid range power. These were all Top end power.
I am thinking of a modified twin (home built plenum and a pair of throttle bodies..
Probably a LOT cheaper too.
1. The point of a journey is not to arrive.
2. Never take life seriously. Nobody gets out alive anyway.
Best Regards
Geoff
http://www.v8viento.co.uk
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ceebmoj
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| posted on 19/10/06 at 09:29 PM |
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hi all,
can get the plates made in ally for £50 a pair ish. But I am still weighting on the price of a set of manifolds made up will pop in to see the guy
tomorow and get a price for the manifolds.
Blake
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wilkingj
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| posted on 21/10/06 at 02:21 PM |
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Ive just been tidying the shed ready for a trip to the tip.
Looking at my spare manifold, It would be possible to cut away the top section and then weld in some tubes for the throttle body. Also you could plate
off the back of the waterway section and retain the thermostat bousing and waterway. This would have benefits with the seating of the manifold and the
sealing of the valley gasket.
Also you must only use the front set of waterways or the front section will overheat as nothing much will flow along the head. (read this on the net
re: a guy who made his own manifold).
I have also noticed that 46mm O/D ally scaffold has an internal diameter of approx 39mm, and its thick walled. - Useful bit of knowlege for this
project.
Also if making plates, there are two things I can see to be careful of.
1. The fixing bolts need to pass through the plate at an angle. This would probably best be done by drilling an oversized hole and then welding a
short tubular boss onto the plate so the bolt head seats squarely on the boss, or it will not sit flat on the plate of the new manifold.
2. The lower side of the plate needs to be set such that it holds the Valley gasket down near the rubber seals at each end of the valley. This I think
needs a plate of 470mm x 65mm min, and whatever thickness.
Also the width of the inlet port is 44mm x 24mm. This does not match well into a 39mm circular pipe.
Whether it is better to have a thicker plate, say 25mm, and do a transition in the plate, or a fabricated one with a thinner one. I dont really know.
I have also wondered if using a thinner walled tube, like a TV aerial pole and crushing one end so it is a squared off oval shape to fit in the
manifold plate.
Anyone else thought about this?..
Just my 2d worth... I'm off to the tip now I'v had my cup of tea..
1. The point of a journey is not to arrive.
2. Never take life seriously. Nobody gets out alive anyway.
Best Regards
Geoff
http://www.v8viento.co.uk
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