Hopefully someone with the newer Comptech 1220/1200 kit can chime in and help or someone familiar with the newer Comptech 1220/1200 kit? The situation I am in is I want more boost. From my understanding the major issue with the newer kits is the mount bolts prevents from running a smaller pulley, and bolts needing to be flush with the bracket. I went and bought another Comptech Bracket used to experiment and have the resources to do some machine work to possibly make this work (3.2 or 3.4).

I was hoping someone here can provide me with the thread and pitch size of the bolts that holds the charger to the bracket go I can go to the hardware store to purchase. While I could probably get it myself, I do not want to go through the hassle of pulley apart my kit till I and ready to mount the new bracket.

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I will update as I go with the work (pictures, tools, and anything else that arises) that goes into making this work for anyone wanting more boost, my contribution to the forum.

 

If you had posted this a week earlier I could have told you.

I would call or email Nate at CTE. (916)-635-4550 extension 300, nate@ct-engineering.com

FYI - Science of Speed uses flat head socket cap screws and have those holes countersunk on their Comptech Novi 1220/1200 retrofit kit. Seems like you could easily get a countersink tool and countersink those existing holes from the back of the plate and use flat head socket cap screws.

Do you have a caliper that you can measure the diameter of those holes?

 

Hey Andy,

Thanks for the suggestion and input. I already tried calling Nate and emailed him waiting for a response, he seems to be really busy lately and hard to get a hold of. I figured in the meantime maybe knew the thread and pitch size of the bolts or flat head socket cap screws. I know about the flat head socket cap screws on the SOS kits and have a countersink bit on my drill press that can perform the job easily. I was just trying to get the thread pitch so I can go to my local Nuts/Bolts to purchase the required flat head socket cap screws or possibly Allen Cap Screws recessed in the bracket.

 

Perhaps call paxton, as its actually going into the back of their blower..? I have the SOS bracket with the countersunk screws also, but don't know if those bolts are english or metric (Paxton is an american company but I'm not sure if they use SAE bolts).

I mav still have the instructions for the SOS brackets laying around. I can look when I get home, as I believe that had the screw sizes listed on it.

P.S. How the hell did you get a bracket with the CARB number without buying a full kit? They refused to sell me one with the CARB number; I bought one initially, but it didn't have the CARB number silkscreened on.

 

Sounds like you're ahead of the curve. I too tried to call Nate a few times on Monday and Tuesday of this week with an email sent on Monday. He finally was able to get back to me on Wednesday afternoon-ish. He's a busy guy but knows his stuff over there and can always get me the info I need.

Like I said, I had all these bolts out just a week ago. They used metric tools to remove, so they are definitely metric sizes. If I had to guess, I would say the smaller ones were M8x1.25. But this info is useless without knowing what length of bolt you need which would require you to have the blower off to measure the thread depth (or to measure current hardware). And remember that flat head's measure their length from the top of the head to end of thread whereas standard SHCS measure from the underside of the head to end of thread.

If you could accurately measure the diameter of those holes then we could confirm what size bolts they are. Standard machining practices utilize a set diameter clearance hole around any given bolt diameter. I.E. an M8 typically uses a 9mm clearance hole, while an M6 typically uses a 6.6mm clearance hole.

 

Thanks for the suggestion Lleron, I got the bracket by pure luck through ebay. A little bit on the expensive side but still cheaper than going through Nate.

Thanks Andy, I measure the holes at 8mm for the 4 holes, but it would be guessing at this point. Worst cast I will pull the kit off my car and get the sizes. I do have my build sheet put having a hard time figuring what is what. Maybe you can take a gander. I am thinking it is the part # 802-7019

 

Yep, that very well could be them. Its so weird that they aren't metric. The ones that go in the three larger holes into the blower must be the three M12x25's, so those are metric but the others aren't?! But 5/16's are the inch equivalent to M8's, and they use the same Allen wrench, so I would say those are them. I just didn't realize they were inch bolts since they came off with the metric Allen wrench and the others were M12's.

I also wonder why they use washers for those four bolts, listed right below the bolts. Looks like they typo'd "5/16 washer" as "6/16 washer", lol.

 

Yeah I was a bit confused too until Lleron reminded me that Paxton being used in domestics, lol. Funny thing is I don't remember seeing the washers but whatever. Thanks for your help Andy. I will go pick up the hardware tomorrow at my local hardware shop and start with the measuring before countersinking the plate. I will update with pictures as I go.

 

I looked last night for the instructions but must have thrown them out after the install. It seems like you have it relatively sorted out though. Good luck!

 

No worries Lleron, I think I got it now. I really appreciate your help.