Turbo Clutching

[Dirt Merchant]

Hello to all, I am a new user/old lurker. I am running a 06 Apex MCX rear mount. I keep hitting the rev limiter at 6000 feet 13-15 psi. I am running a blue pink blue primary spring and stock secondary. I have heavy hitters at 58.8 grams. The 3/4 allen bolt hole #1, 7/16 steel bolt with 2 semi heavy TSK 500 washers hole #2, 7/16 steel bolt with heavy 501 washer hole #3. Over revving on top end but not many thread left for more washers. Anyone else running anything close or suggestions.

 

[rxwarrior]

Heavy Hitters

You will need to go to the 60 gram base weight Heavy Hitters.

 

[Rx1M5]

If you are using the 48.8 gram base weights rxwarrior is right you will need to go to the 60 g base weight. I just put a set into mine. You can only go so far with the 48's.
Rx1M5

 

[KnappAttack]

I'll check mine out for you. I know I'm at a total weight of 84 grams at 11.7 lbs boost on CPR kit with heavy hitters. I'm using the stock primary spring in 07 attak, not sure on colors. Funny how memory fades with age. 13-15 pounds you'll need some serious weight, maybe 88-90 grams.

 

[Ted Jannetty]

I'll check mine out for you. I know I'm at a total weight of 84 grams at 11.7 lbs boost on CPR kit with heavy hitters. I'm using the stock primary spring in 07 attak, not sure on colors. Funny how memory fades with age. 13-15 pounds you'll need some serious weight, maybe 88-90 grams.

YSY Your gettin old Mike.

 

[Dirt Merchant]

Thanks for all the info guys, I'll have to check my base weight out.

 

[Turk]

Get some 5 gram tungsten washers & a steeper helix. You can go that way cus your at higher elevation & won,t pull as much weight. A set of base 60 gram hh,s do work sweet tho; especially down low.

 

[TWIN TURBO]

Just built a turbo apex for a customer at 14 lbs. boost 1600' elevation had to go to 90 gram supertips to hold it.