Hey guys,
I am looking for a set of main studs for my b18a1 out of my 93 integra. I cannot find them anywhere. ARP said they would custom make them for me but I was wondering if there was a possibility that the b18c or b16a1 were the same bolts? Does anyone have any idea? Any info would be great thanks.

 

bump

 

bump come on someone has to know

 

I got mine from Summit for my C1. Try calling them and talking to Kip. He's a good guy and really their only import know-it-all. He may be able to help you.

 

Call ARP and ask to talk to Kammy. (805) 339-2200

If the B16 has a girdle spanning the inside three caps, then my guess would be that it's the same as the B18c.

The funny thing is that ARP has a B18C kit that isn't as of yet listed in any catalog! The only problem is that the "long" studs are about an 1/8" shorter than would be optimum. As a result, you don't "bottom out" the stud into the block if you want "one thread" above the top of the nut. (the threads into the block are 1" long)

ARP is currently sending me a different set of "long" studs to see how they work and if they will clear the windage tray. (there is only 5/32 clearance between the current "long" studs and the tray)

I believe that Lightning Motorsports were going to buy up all the sets that ARP had in stock, so if you need them fast, you should order them there. (Plus Tom normally has a real good price)

Wes Vann

 

Don't need them. Use the stock main bolts. As long as they are replaced everytime the motor is taken apart they can handle anything you throw at them.

 

Here's what I now know:

The part number for non-girdled VTEC motors (and possibly non-girdled non-VTEC motors) is: 208-5402. That kit comes iwth the following: 8 studs (4.0" tall) and 2 studs (4.4" tall). The two taller studs I'm presuming are for the #3 main cap which is taller than the other four.

The part number for girdled VTEC motors is: 208-5403. The kit comes with 6 studs for the three center caps with girdle (5 1/16" [5.0625"] long) and 4 other studs....I'm not sure of the height, but it's probably the same as the 4" ones from the non-VTEC kits.

To measure how tall of a stud you need, you measure the amount of thread recess there is in the main saddle, measure the height of the main cap, and then add those two together with an extra 3/4" (for the stickout to accomodate the nut and washer). I haven't used the formula yet, so I'm not sure about the 3/4" estimation.

I also talked to the lady about spec'ing out a kit for the Function 7 main girdle, which spans all five main caps. As of now, they don't have a kit with all 10 studs of the longer length (5.0625"). You have to buy the 208-5403 kit and four individual 5.0625" studs. That part number is: ATP-5.060-1LB.

The 208-5403 kit goes for $75.39 from Summit Racing, but they're currently backordered. However, if you've ever ordered from Summit before, you'd know that the backorder status isn't always very accurate. Sometimes you get the item way before the estimated backorder release date, and sometimes it just lags and lags and lags.

 

I've got the 208-5403 kit that is planned for the B18C1 and there are a couple things that I'd like to comment on. It's a virgin 95 B18C1 that I'm using the kit on. The comments listed have been discussed with ARP.

It should be stated first off that there is always the possibility of manufacturing variations in the engine leading to my situation, however I don't believe it to be the case and will explain why latter.

There is a long standing "industry standard" that there should be approximatly 1 to 2 threads exposed above the nut when installed.

In this kit there are 4 "short" studs and 6 "long" studs. There is no problem with the short studs however the long studs are short by 0.10" when installed as instructed.

Unlike the factory bolts, the "shank" on the studs are larger in diameter than the threads.

It has to be understood that when installing the studs, it is the end of the threaded section "bottoming" out that limits how far it goes into the block. In other words, the "shank" bottoms out. It's not that the end of the stud bottoms out in the bottom of the hole. As a result, the overall length of the stud is not the factor that should be used in selecting the correct size! (this is what was stated in the prior post, but may not have been clear) In other words; a stud that has an overall length of 5.05" may or may-not be correct.

When installed, the end of the "long" studs are approximatly 0.10" short from giving that 1 thread above the nut! The end of the stud is below the nut. (there are approximatly 2 threads above the nuts on the "short" studs, as I would expect)

In discussions with ARP, here is what I found out;

If I wanted to have 1 thread above the nut, I could just not thread the stud all the way into the block.

The "long" studs were not originally intended for the B18C1, but were "close enough".

I could use a longer stud (part number ATP-5350-ILB) however there may be clearance problems with the windage tray.

Here is what I did and some other points;

The "long" stud has a overall length of 5.05" and would be fine except that the threaded section that goes into the block is 1.10" long (the short studs have a threaded length of 1.00"). If they only threaded it 1.00", it would be fine.

I had ARP send me the other studs that had an overall length of 5.35" and threaded length (into the block) of 1.00". They DO hit the windage tray. I cut them down to 5.075" and they now work as I feel they should. I did loose the end that you would insert an allen wrench to sung them down.

As for manufacturing variations leading to this situation; if this was the case then I have to ask why the "short" studs don't also have a similar problem.

I'm sorry about the long diatribe, however I feel that ARP is putting together a kit that is "good enough" in their minds but may not be up to what purchasers may expect of them.

Wes Vann

 

I just wanted to add that one of the engineers at ARP is doing more research on this as a result of my sending photos showing the installed studs.

Wes