RX7Club.com - Mazda RX7 Forum - Turbos to Manifold studs

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Turbos to Manifold studs

Hello, I keep looking through the FSM and the parts manual and their very vague. I need to order one of the smaller studs, is there only one of the small ones? Are the rest of the studs the same size? I need 2 of the regular ones.

Im looking for part numbers too for the small and big ones, going to be ordering from Atkins.

Thanks.

The smaller stud is N391-13-456 and there is only one. MSRP from Mazda is $17.14. The larger studs are NF01-13-708A and there are a total of 5. They are $18.25 each. Hopefully Atkins has a good deal on them. The parts can be found on page 1-C4 in the parts catalog.

And theres like a big bolt in the middle right?

Also would any of the turbo to downpipe studs work? Their just a tad bit shorter.

There are two bolts in the middle. N390-13-453A. I believe the downpipe studs will work. Not 100% on that though.

Im looking at atkins and it says theres 2 of the small studs and the part number is same for downpipe and the turbo ones. But the downpipe ones are shorter on the ones I have. 93-95 Rx7 Turbo to Down Pipe & Turbo to...

Try searching next time: https://www.rx7club.com/3rd-generati.../#post10669635

Quote:

Originally Posted by theorie (Post 10669635)

I've gotten a few PMs from people due to my build thread asking for stud sizes and where I got them. Just wanted to update the thread with a follow up that includes everything in one post.

Here is everything you'll need to re-stud the stock turbo stuff:

https://www.rx7club.com/attachments/...aust-brick-jpg

For the brick. See the photo in the 1st post for letter codes:

A,D,E,F,H | 98867A350 | Metric Black Class 8.8 Steel Spacing Stud M10 Size, 37mm Overall Length, 1.5mm Pitch | Quantity 5 | $0.81 Each
B,G | 98867A360 | Metric Black Class 8.8 Steel Spacing Stud M10 Size, 72mm Overall Length, 1.5mm Pitch | Quantity 2 | $1.28 Each
C | 98867A315 | Metric Black Class 8.8 Steel Spacing Stud M8 Size, 35mm Overall Length, 1.25mm Pitch | Quantity 1 | $0.48 Each

For the 4 studs that bolt the brick to the engine block:

98867A355 | Metric Black Class 8.8 Steel Spacing Stud M10 Size, 62mm Overall Length, 1.5mm Pitch | Quantity 4 | $1.18 Each

For the downpipe:
You can use 4 of the M10x1.5 that are 37mm long (same as A,D,E,F,H on the brick). Part number 98867A350

You'll also want washers. I used these (sold by the bag):

91166A280 | Din 125 Zinc-plated Class 4 Steel Flat Washer, M10 Screw Size, 20mm Od, 1.8mm-2.2mm Thick | $3.98 per pack of 100

For the copper lock nuts I used:

PM33629 | M10-1.5 Exhaust Lock Nut Copper Plated Steel 14mm Hex | $12.30 per pack of 25
PM33627 | M8-1.25 Exhaust Lock Nut Copper Plated Steel 12mm Hex | $15.82 per pack of 25

My brick all re-studed (I actually had to use one different stud because my brick had been heli-coiled, but you get the idea...):
http://gallery.tfrascone.net/var/alb...3/IMG_6330.jpg

Atp turbo in Hayward has everything you need. Pretty cheap too.