Discussion
Does anybody know how strong a jago (jeep) chassis is and how much stick and power it should be able to cope with. I was talking to a bloke the other day and he has told me to be careful and watch what power i put through it. I have never had any doubts but now he has got me thinking !!!
The main problem I can see is the twisting forces from a powerful engine.
The ladder frame chassis flexes anyway under normal conditions which is part of its design.
Of course the more power the engine produces and is able to put through the wheels the more chance that the natural twisting which normally is due to variations in the surface the vehicle is on will also be translated into the vehicle from the torque of the engine.
What sort of power are you planning on trying to put through the vehicle?
The ladder frame chassis flexes anyway under normal conditions which is part of its design.
Of course the more power the engine produces and is able to put through the wheels the more chance that the natural twisting which normally is due to variations in the surface the vehicle is on will also be translated into the vehicle from the torque of the engine.
What sort of power are you planning on trying to put through the vehicle?
Logibear here
It is with some interest that I have watched this topic.I expected some of the young bucks out there to reply with reports of " big power units " No one has replied other than the TecSec.. I am an OAP with a 1300 Xflow in my GP and that is fine for me. She will easily pass buses etc when asked. I am not technical but have nearly 50 years of driving experience of all kinds including off road handling in the army. Not regarding the chassis problems - I wouldn't like to handle a short wheel base, out of control, due to such a power unit.
Good luck V8man it's your funeral.
LOGI
It is with some interest that I have watched this topic.I expected some of the young bucks out there to reply with reports of " big power units " No one has replied other than the TecSec.. I am an OAP with a 1300 Xflow in my GP and that is fine for me. She will easily pass buses etc when asked. I am not technical but have nearly 50 years of driving experience of all kinds including off road handling in the army. Not regarding the chassis problems - I wouldn't like to handle a short wheel base, out of control, due to such a power unit.
Good luck V8man it's your funeral.
LOGI
Cheers yogi bear. Nice to know that there is always one morbid chap about. I am not a young hooligan that tears about on the road putting peoples life in danger. I know you have not said that direct, But my jeep is built for a purpose and that is 1/4 mile sprints on a private race track and that is where it is used so i dont see any buses while using it to its extreme. The funeral comment, Atempting fate. And as far as putting big engines in: These days people do put big engines in little short cars Its everyone to there own.
Tecsec: I am wanting to put a 5ltr in it and for on the strip use several 000bhp of nitrous so then it would produce about 600+bhp it has a big 9" ford american axel with coil overs and a 4 link set up so it sets of streight and smooth. I know that some of the jago chassis use yankie engines but not sure if they have been moddified. I dont want to be the one to say it wont when its too late. so any advice would be grateful.
P.S I tryed to reply earlier but could not post any replys..
Tecsec: I am wanting to put a 5ltr in it and for on the strip use several 000bhp of nitrous so then it would produce about 600+bhp it has a big 9" ford american axel with coil overs and a 4 link set up so it sets of streight and smooth. I know that some of the jago chassis use yankie engines but not sure if they have been moddified. I dont want to be the one to say it wont when its too late. so any advice would be grateful.
P.S I tryed to reply earlier but could not post any replys..
Sorry to be a doom merchant but that is more power than the ladder chassis on a Jago can be expected to handle.
The material used is too flexible, even adding more cross members would not do, reinforcing would remove some of the flexing and make the chassis, as is, more likely to fail.
I would have to advise talking to an engineer with the experience to offer guidance in building a more robust chassis, flexible yet able to cope with the torque you are intending to apply.
I have experienced Rolled Steel Hollow Section failing under much less stressful conditions. So please talk to a techie with up to date knowledge of the sliderule and build the chassis for the job.
The material used is too flexible, even adding more cross members would not do, reinforcing would remove some of the flexing and make the chassis, as is, more likely to fail.
I would have to advise talking to an engineer with the experience to offer guidance in building a more robust chassis, flexible yet able to cope with the torque you are intending to apply.
I have experienced Rolled Steel Hollow Section failing under much less stressful conditions. So please talk to a techie with up to date knowledge of the sliderule and build the chassis for the job.
The main problem with ladder frame chassis (like the Jago) is that to brace it against twisting, the bracing bars have to go where other things are like engine or gearbox !!! You might be in the way as well if you tried to run bars from the roll bar (assuming you've a hefty one) over to the front strut tops. It's all about putting diagonals across the squares.
You might get some ideas from looking at the dragster jeeps that come up on eBay from time to time- some are really extreme and are basically space frames with f/g bodies on top- just like a ....
Apparently the strongest shape in nature is the egg- so if you ran two hooped bars from the front bumper over the body to the rear bumper, diagonally so they crossed in the middle and braced them onto everything close by, you'd get the best torsional rigidity. Not as daft as it sounds- most modern cars get their strength through having a roof. I found out the hard way when I chopped the top off a Cortina Mk4- it was easy to brace longitudinally but less so transversely- I called it the "Archer Access" - my flexible friend. Looked gorgeous though.
For a practical guide to torsional rigidity, frame triangulation and "feeding the loads", check out:
www.carsfromitaly.com/maserati/maser_birdcage.jpg
Cheers
Ian
>> Edited by IanA on Wednesday 10th November 23:35
You might get some ideas from looking at the dragster jeeps that come up on eBay from time to time- some are really extreme and are basically space frames with f/g bodies on top- just like a ....
Apparently the strongest shape in nature is the egg- so if you ran two hooped bars from the front bumper over the body to the rear bumper, diagonally so they crossed in the middle and braced them onto everything close by, you'd get the best torsional rigidity. Not as daft as it sounds- most modern cars get their strength through having a roof. I found out the hard way when I chopped the top off a Cortina Mk4- it was easy to brace longitudinally but less so transversely- I called it the "Archer Access" - my flexible friend. Looked gorgeous though.
For a practical guide to torsional rigidity, frame triangulation and "feeding the loads", check out:
www.carsfromitaly.com/maserati/maser_birdcage.jpg
Cheers
Ian
>> Edited by IanA on Wednesday 10th November 23:35
Hi V8
Yes this forum has had some problems recently which meant it was out of action for a while hence why none of us could get anywhere near it for a bit.
I think that the folks who are suggesting a chat with an engineer who knows his stuff re torque and chassis design are on the right track. To get the best out of the beast a new "space frame" set up is probably needed. Should be possible so that the Jago body (even if it is a remove the floor and bolt body onto new chassis/roll cage set up which has its own floor)will still be there so making it the meanest Jago on the strip.
How have things been going regards the 1/4 mile times since we last spoke?
Let me know how things go re chats with engineers and the like.
Best wishes
Chris
Yes this forum has had some problems recently which meant it was out of action for a while hence why none of us could get anywhere near it for a bit.
I think that the folks who are suggesting a chat with an engineer who knows his stuff re torque and chassis design are on the right track. To get the best out of the beast a new "space frame" set up is probably needed. Should be possible so that the Jago body (even if it is a remove the floor and bolt body onto new chassis/roll cage set up which has its own floor)will still be there so making it the meanest Jago on the strip.
How have things been going regards the 1/4 mile times since we last spoke?
Let me know how things go re chats with engineers and the like.
Best wishes
Chris
Thanks everyone for your positive help. I Have a freind who builds chassis and everything (i supose)for race cars. I think he will be best to talk to as he is only a phone call away. The roll cage that i have attaches to the chassis at the rear and has a cross over 1/2 way up above and at the front it goes on to the strut tops. It has quite a strong roll cage but as you guys say it needs to be right.
As far as how did my 1/4 mile runs go. I blew my head gasket and it pulled the threads out of the block but i acheved a 0-60 time of 4.2 secs in cold tyre spinning conditions. I am expecting to get to sub 3 secs, so thats why im making serious enquiries.
Cheers.
As far as how did my 1/4 mile runs go. I blew my head gasket and it pulled the threads out of the block but i acheved a 0-60 time of 4.2 secs in cold tyre spinning conditions. I am expecting to get to sub 3 secs, so thats why im making serious enquiries.
Cheers.
I have just come across a tubed chassis for sale to suit a mk1 escort van the size is 48"wide, 150"long, and 43" high. to save me going to find my jeep under everything in my garage and unlocking the many locks on my door, Does anyone know the size of the jago jeep 1977 model. 
or this might modifiy to fit my requirements.
or this might modifiy to fit my requirements. Not sure of the dimensions of the '77 but the basic Geep/Sandero measurements published by Jago are:-
Front bumper to rear bumper 3200mm
Outer point of each wheel (ie its total track) 1540mm
Height which of course is from the ground to the top of the vehicle and varies depending on whether soft top, hard top and suspension set up 1650 to 1805mm
What actual measurements do you require V8 as I should be able to measure the Geep I am currently (when the weather allows) working on for a fellow Jago owner.
I would measure T4x4 but with all the mods done to date it would not be a true picture of the Jago set up.
Front bumper to rear bumper 3200mm
Outer point of each wheel (ie its total track) 1540mm
Height which of course is from the ground to the top of the vehicle and varies depending on whether soft top, hard top and suspension set up 1650 to 1805mm
What actual measurements do you require V8 as I should be able to measure the Geep I am currently (when the weather allows) working on for a fellow Jago owner.
I would measure T4x4 but with all the mods done to date it would not be a true picture of the Jago set up.
Cheers for the info im going to have to go in the garage and measure it as i need to start a A4 list of mods and alterations that i need to do over winter Including lowering the front end 4 or 5 inches and painting it a brighter orange than it already is and putting purple flames over the bonnet. But it is only used on tarmac these days and not on rough terrain any more Hence me lowering it. It was only a few years ago i wanted to lift it up 2 foot. One extreme to the other..
Logi, i think our jeeps will be the same model even though they will probs look totaly diffrent from one another.
Logi, i think our jeeps will be the same model even though they will probs look totaly diffrent from one another.
New member here just come across this post whilst looking for something else. Anyone here heard of Andy 'Fadster' as featured in the below video link??
http://www.youtube.com/watch?v=agMZeTJydIo
I know its not a Jago Jeep but im sure Geoff followed the same basic principles with all his chassis. Andy's street legal model T is fitted with a nitroused small block chevy producing just shy of 1000bhp. And yes, it is the original Jago model T repro chassis, granted that it has has some considerable chassis upgrades by John Sleath. But I repeat, the base chassis is still the original Jago item.
Not trying to come across as a smart arse or piss on anyones cheerio's but just bringing information to the table that may help a guy out.
http://www.youtube.com/watch?v=agMZeTJydIo
I know its not a Jago Jeep but im sure Geoff followed the same basic principles with all his chassis. Andy's street legal model T is fitted with a nitroused small block chevy producing just shy of 1000bhp. And yes, it is the original Jago model T repro chassis, granted that it has has some considerable chassis upgrades by John Sleath. But I repeat, the base chassis is still the original Jago item.
Not trying to come across as a smart arse or piss on anyones cheerio's but just bringing information to the table that may help a guy out.
Gassing Station | Jago Owners Forum | Top of Page | What's New | My Stuff