FT-86 to be named FR-S...

[Nafe]

If going this route may as well switch to a 5 point harness for the anti-submarining strap too.

Only if you want to cut up the base of the seat to fit the extra strap....

[spiller]

Also, factory lower points a generally too far back for correct mounting of lap belts in a 4pt harness. The problem with that is tightening the shoulder straps results in the lap belt riding up over your abdomen instead of staying over your pelvis, greatly increasing the risk of internal injuries if you crash.

I never used my harness in my 180SX track car because there were no suitable mounting points. I figured the stock lap sash is far better than a poorly fitted harness.

so the lap belt mounts should be positioned as such so the belt is in straight line across your pelvis?

[hrd]

so the lap belt mounts should be positioned as such so the belt is in straight line across your pelvis?

the lap belt should be over the bony structure of your pelvis/hips where the lap belt sits in a normal lap-sash seatbelt. To achieve that with a 4pt harness, the lap anchorages need to be almost straight down - CAMS recommended angle for those straps is 5-15deg behind vertical. With a 4pt harness, that's the only way to prevent the lap belt from being pulled up over your stomach when you tighten the shoulder straps. Their acceptable range is up to 45deg, which is more like what you end up with using the lower factory seatbelt mounts, but in my experience you can't keep a 4pt lap belt in the correct location when the shoulder straps are tightened when the angle of the lap belt is anything like that large - it just gets pulled up too high by the shoulder straps. That increases the risk of internal injuries and/or submaringing in a frontal impact.

[Cal]

the lap belt should be over the bony structure of your pelvis/hips where the lap belt sits in a normal lap-sash seatbelt. To achieve that with a 4pt harness, the lap anchorages need to be almost straight down - CAMS recommended angle for those straps is 5-15deg behind vertical. With a 4pt harness, that's the only way to prevent the lap belt from being pulled up over your stomach when you tighten the shoulder straps. Their acceptable range is up to 45deg, which is more like what you end up with using the lower factory seatbelt mounts, but in my experience you can't keep a 4pt lap belt in the correct location when the shoulder straps are tightened when the angle of the lap belt is anything like that large - it just gets pulled up too high by the shoulder straps. That increases the risk of internal injuries and/or submaringing in a frontal impact.

Yes and I have been pushing my luck using a 2" 4 point in the race car for far too long. Must order a 5 point before it goes out again.

[spiller]

the lap belt should be over the bony structure of your pelvis/hips where the lap belt sits in a normal lap-sash seatbelt. To achieve that with a 4pt harness, the lap anchorages need to be almost straight down - CAMS recommended angle for those straps is 5-15deg behind vertical. With a 4pt harness, that's the only way to prevent the lap belt from being pulled up over your stomach when you tighten the shoulder straps. Their acceptable range is up to 45deg, which is more like what you end up with using the lower factory seatbelt mounts, but in my experience you can't keep a 4pt lap belt in the correct location when the shoulder straps are tightened when the angle of the lap belt is anything like that large - it just gets pulled up too high by the shoulder straps. That increases the risk of internal injuries and/or submaringing in a frontal impact.

I get what you mean, makes good sense. I use a Schroth ASM 4 point harness although hopefully I never have to find out how effective it is in the event of an incident. I think Ill just use some load spreaders for the lap belt anchors anyway when I finally get a cage in the car.

[260BC]

Seatbelt mounting plates should be available from any decent race shop in the CAMS specified size. I have the same sort of ASM belt as Spiller, they seem to be a good thing.

[Dave]

Extreme @ virginia (they changed names, can't remember what their new name is) have anchor points, bolts and harness parts on the shelf

[MarkMash]

Lexus derivative of GT86?

If you were to hit someone at 12km/h you would chop a leg off.

[da9jeff]

FWIW, the crutch strap isn't designed to hold you by your balls in a crash, its only meant to hold the rest of the harness down over your torso.

[2rismo]

FWIW, the crutch strap isn't designed to hold you by your balls in a crash, its only meant to hold the rest of the harness down over your torso.

That's right but it has no problems attempting to hold you by your nuts and ripping sack. 6-point FTW.

[200MPH]

Yeah, 4 pt harness is pointless as mentioned. Been there tried that. Need the crotch strap as mentioned to hold lap lap belt down when shoulder harness nipped up. Don't fack about. Get a 3" wide 5 or 6 point harness. Watched my mate roll his speedway car years ago and I still remember the bruising from the old 2" harness was pretty nasty a day or two later.

[Coffin]

Yep, i'd run a 6pt

[dab.of.oppo]

Lexus derivative of GT86?

I really dig the roofline/ rear quarters on that thing.

[crimespree]

dealers are getting more stock allocated to them for december, if you want to be a prick and get one before those who have already ordered then start calling around and see what you can swindle...
actually why am i saying this.....

[Mr Purple]

Just confirmed November build, December delivery for mine.

Good, was starting to think about a secondhand IS-F in a dangerous way.