Re: Racing seats
 

We have used the poly and the aluminum in our race cars over the years. The inserts in the poly seats are worthless and as some have noted here, bolting them through is the way to go plus making sure you have the back of the seat supported/bolted to the roll cage cross brace. With the seat installed this way, it does a good job and I think is very comfortable. My boys like the Kirkey seats in their racecars and at least with the optional covers they aren't too bad - w/o the cover the things are rough on the bottom of your spine in my opinion. I also have found that the forward bolster part of the Kirkey seat kind of catches my outer thigh area and tends to hurt eventually. If you have the chance I would see if someone will let you sit in their car to see how they feel to you.

Re: Racing seats
 

On a stock floorpan car how are you mounting the seats? On thru bolting the plastic seats are you using carriage style smooth head bolts? Are you drillng thru where the inserts are?

Re: Racing seats
 

I welded some threaded inserts into the floor pan similar to the stock seat mounts. I drilled the threads out of the seat inserts an used a 3/8 grade 8 bolt with a large flat washer to bolt through the bottom of the seat to the floor. 1 half inch bolt through the back into the cross bar

Re: Racing seats
 

I think the problem that Tech & SFI has had with the Jaz poly seats is the Hot Knife used to cut the openings for the belts would leave a sharp edge and chafe the belt and weaken them. I was told by a very creditable source that is what happened and added to the results of Lee Shepherd's crash, hence the inspections for seat belts. In recent years they have gone to milling the openings out with a mill instead of the hot knife. You still need to be careful with those seat openings and belt chafing. The thread inserts are another problem that should be addressed. Those seats are almost as comfortable as a form fitting foam fill.

Re: Racing seats
 

OK, so you actually have the seat sitting on the floorpan? I sandwiched the floorpan between 2 pieces of steel but mad seat mount brackets under the seat that are adjustable for tilt.
Are stock factory seat adjusters legal? I've had a car with a poly seat that had the poly seat bolted to the adjusters.

Re: Racing seats
 

I have one of the last Gen 3's that Ed Quay did, himself. I plan on finishing it sometime in 2016. It was delivered with Kirkey alum seats on what looks like a stock bucket seat adjuster/slides. The back of the seat support is built to attach to the roll cage cross bar and adjusts as the seat adjusts. I would assume he wouldn't build a car for NHRA Super Stock that didn't fit the rules.

Re: Racing seats
 

oops double hit

Re: Racing seats
 

Yes my seats are bolted directly to the floor. I have a gen 1 Camaro and the floor below the seat is heavy double steel so it makes a good solid install. I am tall so I need the head room. I am also the only driver so no need for adjustable mounts.

Re: Racing seats
 

X2 Only I have a GM "A" body not a gen 1 camaro....

Re: Racing seats
 

In the Chevelle we just did, it was a factory bucket seat car and we used the OE seat mounting points. It's a reinforced hard point, so we used that. But the centerline of the mounting points is not centered on the steering wheel and the seat had to be adjusted over with the mount to center it on the wheel. The Jaz seats we used are mounted about 2 1/4" from the floor to the bottom of the seat to get the best height for visibility, fitting in the cage, etc. We just determined where the seat would need to be and fabbed a CM tubular mount between the floor points and the seat. Made a mirror image piece for the passenger side and made a seat back brace attached to the crossbar..