Pat_T
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| posted on 22/11/18 at 12:55 PM |
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I'm back with a question!
Hi everyone,
I've been away a few years after owning some great Sevens - 200bhp Redtop Stuart Taylor IRS, followed by a 320bhp V8 Westfield.
Starting a new super-exciting and unique Seven-based project soon. And my first post back needs to start with a question:
What is the shortest wheelbase and narrowest cockpit area Seven chassis? Is it a Caterham S3?
Does anyone have a table or list of wheelbase dimensions by chassis kit?
I believe that my old Stuart Taylor was closer to a narrow-body caterham in width than the standard "book" chassis but unfortunately I
never took any measurements of it to confirm.
For your interest while I've been gone I've been busy importing/modding/driving this beast:
2014 Chevrolet Camaro Z28 - 7.0L LS7 (titanium rods and valves & dry sumped all as standard) 650bhp, carbon ceramic brembos, MultiMatic Spool
valve dampers.
Not lo-cost, and definitely not lightweight! But huge fun and hugely capable on track much to everyone's surprise when I appear behind them
cheers,
Pat
[Edited on 22/11/18 by Pat_T]
www.instagram.com/patroclueus
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coyoteboy
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| posted on 22/11/18 at 01:06 PM |
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Hey! Welcome back!
That's a lovely looking car, and I bet it sounds amazing, but it always staggers me how with all that effort put in you can only pull 650hp out
of it?
That's worse cc/hp than a 90's production escort cosworth?
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Pat_T
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| posted on 22/11/18 at 01:20 PM |
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quote:
Originally posted by coyoteboy
Hey! Welcome back!
That's a lovely looking car, and I bet it sounds amazing, but it always staggers me how with all that effort put in you can only pull 650hp out
of it?
That's worse cc/hp than a 90's production escort cosworth?
It's a good point. The LS7 engine is a juxtaposition of very old technology (2 valve, pushrod V8, limiting max engine speed due to valvetrain
mass and ultimately limiting power) with modern materials science enabling it to rev to 7250rpm which is quite a lot for a production pushrod V8. The
advantages in the pushrod layout are simplicity, durability and packaging (it's a very compact layout).
With deep enough pockets you can take them to just over 7000bhp (100bhp/litre) naturally aspirated which is not too shabby. Trust me when I say it
doesn't need any more though 
www.instagram.com/patroclueus
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bi22le
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| posted on 22/11/18 at 01:28 PM |
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Welcome back and nice Yank Tank. I can see you have just got some air on that first pic.
Back to smallest seven style car. I thought the Striker chassis were pretty small.
They have to have unique slim seats fitted and my car certainly appears visually smaller then most when I am on track days.
I'm sure a google search will deliver the sizes of these common-ish cars.
Track days ARE the best thing since sliced bread, until I get a supercharger that is!
Please read my ring story:
http://www.locostbuilders.co.uk/forum/13/viewthread.php?tid=139152&page=1
Me doing a sub 56sec lap around Brands Indy. I need a geo set up! http://www.youtube.com/watch?v=EHksfvIGB3I
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Angel Acevedo
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| posted on 22/11/18 at 03:17 PM |
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quote:
Originally posted by Pat_T
quote:
Originally posted by coyoteboy
Hey! Welcome back!
.....
With deep enough pockets you can take them to just over 7000bhp (100bhp/litre) naturally aspirated which is not too shabby. ...
Beware of what you wish.. for it may come true....
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Pat_T
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| posted on 22/11/18 at 03:18 PM |
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Good shout - a striker is about an inch shorter between the wheels. Then I did a bit more digging and it looks like a Fury is another couple of inches
shorter again!
wheelbase:
Caterham S3 = 2225mm
Raw Striker = 2200mm
Fisher Fury = 2150mm
any others to consider? A Phoenix is built off the same chassis as a Striker is it not?
how big are the Sylva J cars?
edit:-
Sylva J15 = 2270mm
[Edited on 22/11/18 by Pat_T]
www.instagram.com/patroclueus
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Pat_T
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| posted on 22/11/18 at 03:29 PM |
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quote:
Originally posted by Angel Acevedo
quote:
Originally posted by Pat_T
.....
With deep enough pockets you can take them to just over 7000bhp (100bhp/litre) naturally aspirated which is not too shabby. ...
typo - too many 000's!  there's some supercharged ones running into 4 figures though
www.instagram.com/patroclueus
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MikeR
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| posted on 22/11/18 at 03:57 PM |
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I believe the stuart taylor is the same size as a standard locost (bodywork is interchangable). The S3 came in two versions, original and long
cockpit. I believe the original version hasn't been made for a long time (but i'm not totally confident of that statement).
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JC
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| posted on 24/11/18 at 07:46 AM |
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I was looking to build a narrow car a while ago.
http://www.locostbuilders.co.uk/viewthread.php?tid=211567&page=2
This was the info I gleaned from the net. The Striker seems to be about the only car that uses shortened Sierra driveshafts to stick to the classic
Escort axle width. Most others use the full width Sierra rear end.
Most Locost based cars, Stuart Taylor, MK etc. Are based on the Westfield dimensions which means the cockpit opening is longer amongst other things -
part of the post litigation changes Westfield made.
These are the widths I gleaned:
Caterham 160 1575mm
Raw Striker 1550mm
Westfield (Narrow) 1560mm
Westfield SDV 1640mm
GBS Zero 1720mm
SR2 1750mm
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Pat_T
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| posted on 24/11/18 at 09:14 AM |
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quote:
Originally posted by JC
I was looking to build a narrow car a while ago.
http://www.locostbuilders.co.uk/viewthread.php?tid=211567&page=2
This was the info I gleaned from the net. The Striker seems to be about the only car that uses shortened Sierra driveshafts to stick to the classic
Escort axle width. Most others use the full width Sierra rear end.
Most Locost based cars, Stuart Taylor, MK etc. Are based on the Westfield dimensions which means the cockpit opening is longer amongst other things -
part of the post litigation changes Westfield made.
These are the widths I gleaned:
Caterham 160 1575mm
Raw Striker 1550mm
Westfield (Narrow) 1560mm
Westfield SDV 1640mm
GBS Zero 1720mm
SR2 1750mm
Very useful thanks, I don't suppose you found the cockpit widths in addition to the overall widths did you?
At the moment I'm tending towards a Fisher Fury chassis, but I'm still looking for dimensions on the Sylva Stlyus too. A Caterham CSR
would also be ideal but maybe a little pricey start point for what I have in mind!
Caterham standard vs "SV" comparison :
www.instagram.com/patroclueus
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TimC
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| posted on 24/11/18 at 09:43 AM |
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What about the Tiger HS6?
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Camber Dave
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| posted on 24/11/18 at 09:59 AM |
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Sylva Leader
Wheel base 2220
Width over rear wheel arches 1520
Cockpit width inside chassis - at dash 970
Cockpit width inside chassis - at front of seat 1080
Chassis top rail is 50mm wide plus glass fibre body - so add 110 to cockpit widths.
Cockpit opening from dash base to deck behind seat 1200
The Leader project is for sale - search previous posts on LCB
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obfripper
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| posted on 24/11/18 at 07:33 PM |
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Another to consider is the AB Arion/Typhon, the front end is Striker derived up to the scuttle and rear end is Fury derived so is a touch wider than
the Striker towards the back.
There has been quite a lot of development to the front suspension design & setup, the ride height setup is track orientated so may not suit your
intentions but there are a few road registered cars.
There is also a '7' style body in the works if that's more your thing.
Dave
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Pat_T
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| posted on 24/11/18 at 08:29 PM |
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quote:
Originally posted by obfripper
Another to consider is the AB Arion/Typhon, the front end is Striker derived up to the scuttle and rear end is Fury derived so is a touch wider than
the Striker towards the back.
There has been quite a lot of development to the front suspension design & setup, the ride height setup is track orientated so may not suit your
intentions but there are a few road registered cars.
There is also a '7' style body in the works if that's more your thing.
Dave
Thanks Dave, hadn't heard of that one. Will have a look at it.
I want something that will be decent on track so don't mind if it's low. Chassis stiffness is important but I'm not adverse to
putting in some extra tubes.
Bodywork not really important - ultimately I'll be running totally different bodywork.
Whatever I buy needs to be road registered ideally.
www.instagram.com/patroclueus
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hughpinder
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| posted on 26/11/18 at 09:07 AM |
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The sylva riot felt pretty small when I went in it, but I can't find the actual dimensions anywhere.
Regards
Hugh
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jps
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| posted on 26/11/18 at 09:55 AM |
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quote:
Originally posted by Pat_T
quote:
Originally posted by obfripper
Another to consider is the AB Arion/Typhon,
I want something that will be decent on track
Whatever I buy needs to be road registered ideally.
AB Performance generally get a lot of good feedback on here (as with all suppliers there is the odd complaint) - and they seem to have extremely
strong racing pedigree. One of their cars has been road registered too. But they do primarily build BECs
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peter030371
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| posted on 26/11/18 at 12:20 PM |
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The Fury is a little wider than the Striker. The seats in the Fury in my barn did not fit in my older live axle Striker or in my newer IRS Striker
Never measured the wheelbase but it is very close to being the same looking at how they fit on the trailer
If you want any specific measurements from a (live axle) Fury or IRS Striker just ask?
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Pat_T
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| posted on 26/11/18 at 06:19 PM |
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quote:
Originally posted by peter030371
The Fury is a little wider than the Striker. The seats in the Fury in my barn did not fit in my older live axle Striker or in my newer IRS Striker
Never measured the wheelbase but it is very close to being the same looking at how they fit on the trailer
If you want any specific measurements from a (live axle) Fury or IRS Striker just ask?
Hi Peter, if you have both to hand and can quickly double check the wheelbase on both I'd be very grateful. Also a measurement for both from say
the brake pedal face to the rear edge of the cockpit floor would be very interesting (hope that makes sense?!)
cheers,
Patrick
www.instagram.com/patroclueus
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peter030371
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| posted on 26/11/18 at 08:23 PM |
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quote:
Originally posted by Pat_T
Hi Peter, if you have both to hand and can quickly double check the wheelbase on both I'd be very grateful. Also a measurement for both from say
the brake pedal face to the rear edge of the cockpit floor would be very interesting (hope that makes sense?!)
cheers,
Patrick
I will have a measure up tomorrow lunch time
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peter030371
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| posted on 27/11/18 at 08:44 AM |
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God it was cold in the barn this morning!
So comparing a late 90's live axle Fury chassis with a early 00's IRS Striker chassis;
Wheelbase is the same on both at 2200mm
Front wheeltrack is 1500 to the outside of the rims once I had taken into account the fact the Striker has slightly wider wheels
Rear wheeltrack is 1540 to the outside of the rims, again, once I had taken into account the fact the Striker has slightly wider wheels
Difficult to measure the brake pedal to rear firewall as they both have seats fitted however the transmission tunnel on both is 1200mm long and is
possibly a better guide than the brake pedal position
The cockpit width front and rear is the big difference. Front cockpit width (to the outside of the chassis) is only 900mm on the Striker but 1000mm on
the Fury. The rear cockpit width (again to the outside of the chassis) is 1000mm on the Striker and just over 1100mm on the Fury (difficult to measure
on a built up car). Also the sidepod and body work on the Fury are both outside the chassis by a long way and make the care seem a lot wider even
though the wheeltrack is the same.
My Striker suspension is adjustable but the Fury is fixed so may affect the wheelbase/track by plus or minus 5-10mm on each measurement.
Having seen (and lifted) both chassis naked in the past I would also say a few bits of the Fury are 'more robust' than the Striker i.e.
they have some steel floorpan sections, the Striker is all ali in that area. Certainly without body work a Striker is a little lighter than a Fury
(subjective from lifting both part built onto the floor from work stands)
Other big difference is 'as standard' the Fury has a bolt on roll over hoop but the Striker is welded in, may or may not be an issue to
you and your plans
Need any other measurements then just shout
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Pat_T
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| posted on 27/11/18 at 05:43 PM |
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Thanks a lot Peter. That's excellent information. Probably all I need for now. Just need to keep my eye out for the right car to come up for
sale now!
www.instagram.com/patroclueus
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coyoteboy
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| posted on 27/11/18 at 07:51 PM |
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quote:
Originally posted by Pat_T
With deep enough pockets you can take them to just over 7000bhp (100bhp/litre) naturally aspirated which is not too shabby. Trust me when I say it
doesn't need any more though
say what?! 7000 N/A?
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Pat_T
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| posted on 27/11/18 at 09:48 PM |
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quote:
Originally posted by Pat_T
typo - too many 000's! there's some supercharged ones running into 4 figures though
www.instagram.com/patroclueus
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