NST Pulley Kits

[MIKEP]

Anyone know anything about these http://www.shopnonstoptuning.com/store/ ... 011K_.html

They look pretty cool and they are a good price . Are they the oversized pulley or just standard size. Interested in getting a second opinion

[mickeyduck]

Yeah their site is a bit thin on actual info innit?

Not sure I'd put a non-damped pulley on the crank Mike. Being old motors things are a bit loose already and you might find things start to shake and break...

Tom posted about another brand of un-damped alloy overboost pulley on my Rides thread a couple weeks back, complete with pic and full specs.

If you're game to take the un-dampened punt, maybe it would be a go? It's the max, 175mm same as I used to run (mine was a dampened steel one). They up the boost from about 8 to about 14 pound, which brings the AW up to about the same pace in a straight line as a standard gen 3 turbo SW. I'd buy one except I'm apprehensive about the non-dampened aspect. Don't need more stuff breaking... Especially a crank shaft!

https://technotoytuning.com/toyota/16v4 ... ank-pulley

[Ken & Barbie]

Hi Guys,
FYI, some years ago, I swapped a blown 4AGZE motor for some CF Bedford parts I had. The cause of the "blow up" was supposedly due to one of those all alloy (non dampened) big diameter pulleys.
I had the centre of the alloy big pulley machined out, and shrink fit/dowelled onto a machined down stock dampened one. A dyno run showed 11.6psi boost, and 163BHP.
Cheers,
Ken.

[MR2GUY]

Hi Guys,
FYI, some years ago, I swapped a blown 4AGZE motor for some CF Bedford parts I had. The cause of the "blow up" was supposedly due to one of those all alloy (non dampened) big diameter pulleys.
I had the centre of the alloy big pulley machined out, and shrink fit/dowelled onto a machined down stock dampened one. A dyno run showed 11.6psi boost, and 163BHP.
Cheers,
Ken.

Yep and I happily have this Dampener on my AW11 thanks to Ken.

I know that Endevour Engineering in Tauranga can shrink pulleys onto Dampeners as the have done with my AE92 track car.
But a great option for the 4agze oversize pulley is the one that Barry Manon specially had made from BHJ which retains Harmonics ( http://www.mrpltd.co.nz/product/4agze-boost-up-pulley/ )
A very nice piece in my opinion and comes with the idler also

[mickeyduck]

I agree MRP's one is very nice - pity about the price.

I'll ask Endeavour about rebuilding my pulley... Thanks for the info Cam.

[85AW20v]

MRP might also know someone who can sort out your crank timing sprocket Charlie....
http://www.mrpltd.co.nz/product-categor ... ion-parts/

[mickeyduck]

Are you referring to their offer to cut a new keyway in a crank sprocket for $45 Simon?

Screen Shot 2017-04-15 at 7.10.02 pm.png (12.45 KiB) Viewed 3891 times

Doing that in my naffed over-boost pulley would be brilliant except that it also has a bloody great crack through it, so I no longer trust it to hold together.

Maybe it can be sleeved with steel tubing? I can always mod a plastic lower cover to suit.

Or perhaps they can rehash my two crank pulleys to create one? I must ask them. Cos you're right they clearly have the capability. Though they may prefer to try to sell me one of theirs for $700... Might as well ask, for sure.

[85AW20v]

Are you referring to their offer to cut a new keyway in a crank sprocket for $45 Simon? ....

Probably this. Just remembered something about you - or maybe it was someone else - having trouble getting someone to cut a keyway for them.

[mickeyduck]

Yeah it was me Simon but the thing would need welding too which turns out to be the bigger problem. I think I'll try Endeavour Engineering for a start. See if they can make one good over-boost pulley out of my two pulleys.

BHJ are in the USA and the MRP pulley isn't listed as for sale on their site so MRP must have an agreement with them.

http://www.bhjdynamics.com/index.php?ma ... si1s75vnf4

Found this though in case anyone wants to read up about dampened crank pulleys:

http://www.bhjdynamics.com/index.php?ma ... =page&id=4

[MR2GUY]

I had them rebuild this pulley with another supplied one, they sleved the gear after machining the original v belt off and sleeved the snout to reinforce it a bit from future breakout

Before

After

imagejpeg_0.jpg (134.64 KiB) Viewed 3861 times

The price for this was 350 so almost worth getting a new pulley anyway

[mickeyduck]

Less than half the price of a new one from MRP. Looks like a tidy job too.

[MR2GUY]

Less than half the price of a new one from MRP. Looks like a tidy job too.

Yea good point. I have no complaints for them, pretty quick turnaround too.