Well I'm about to drop a 300-350rwkw ca18det into my 1970 ke20 and somehow I don't think the 40 year old chassis will like it too much. The car will be a street car but will also see regular drag strip duties. It will be run on e85, seeing boost of 25psi+ and be brutally launched off the 2 step on slicks.

 

So where should I start with chassis strengthening??

ask oke20 I think thats him, he has a 2j or 1j in his ke20 so I'm sure he has strengthened that chassis.

Would it be a better idea to just make a new stronger chassis and drop the body on top of that?

a decent roll cage will do wonders for chassis stiffness

keep in mind the car is a street car so a roll cage is out of the question

why? not even a half cage or something?

could possibly go a 4point cage

You need a cage. Full stop.

 

Nothing else you do really will prevent the car being turned into a pretzel in fairly short order.

 

It's not a full chassis, and if you seem weld a 40 y.o chassis, it may do something, but it won't do much.

 

When you start punching out that Hp, you need to make a decision whether you want a quick road car, or a quick drag car. Because you won't have both. Not in a 20.

keep in mind the car is a street car so a roll cage is out of the question

 

Why?

NSW. They're a bit funny on cages down there.

NSW. They're a bit funny on cages down there.

 

NCOP states 4 point cages are allowed.

Half cage for a halfwit. Won't do much unless you tie it in with side intrusions to the front wheel arch.

Edited November 28, 201015 yr by Redwarf

Half cage for a half with. Won't do much unless you tie it in with side intrusions to the front wheel arch.

 

Well you can have it setup as a removable 6 point type (removable front bars) but even then the thing will be like a sardine can.

 

OP: Here is the cage section if you are interested (LK8, page 33):

 

http://www.infrastructure.gov.au/roads/vehicle_regulation/bulletin/pdf/NCOP7_Section_LK_Seating_and_Occy_Protection_3Feb2006.pdf

excellent, cheers for that trev I'll give it a read.

Have had a 6point in one of my vls and hated it, it wasn't tight enough to the roof and my head would sometimes hit it.. Can't imagine how it would be in a crash for your skull

excellent, cheers for that trev I'll give it a read.

Have had a 6point in one of my vls and hated it, it wasn't tight enough to the roof and my head would sometimes hit it.. Can't imagine how it would be in a crash for your skull

 

You can't have the front bars in on the road.