405HP_Z06

iTrader: (11)

Nope, sure won't! The valve guide ID on the 144460-16 is .505. The Dart 225 that I have has a guide with a dual diameter. The top where the seal installs is .500, but right below that where the spring locator installs it steps up to .560.

Crane 144460-16 as far down on the guide as it will go:



Dart 225 valve guide, bare. The .560 step is easily discernible:

JPH

iTrader: (2)

yeah your right. the last dart 225s i assembled needed shims under the exhaust side I believe, then I had to grind a little off the locators on the intake side. If you need shims, Comp Cam #4753 is the spring shim kit you will need.

JPH

iTrader: (2)

oh and also, I just remembered that the crane loctaors had to be honed out alittle to fit over the guide as well. sorry man. you could cut the guide down just a little to.

405HP_Z06

iTrader: (11)

I'm using the Dart supplied valves, even had them Mikronited by Crane. According to Jeff at Dart they are manufactured by Basso S.A. in Argentina. http://www.basso.com.ar/productsi.htm

Already picked those up.

405HP_Z06

iTrader: (11)

Except that I don't have an 8mm pilot for my .500 OD valve seal cutter

405HP_Z06

iTrader: (11)

Great feedback, thanks. In the future, you may want to look at Isky Cams #6 Micro Shim Kit. I'm extremely **** and like the small increments this kit provides.

JPH

iTrader: (2)

note taken 405hp. thanks

Randy WS6

iTrader: (69)

I have the Dart Pro-1= 255cc runners , cc'ed by Texas Speed, and mine has 8mm valve stems 2.100" int & 1.60: ext. valves, and the valve springs & seats I use is the PRC Platinum springs .670 lift. that fits in the stock diameter spring pocket.and there spring retainers fit over the valve guide to.

vettenuts

iTrader: (4)

Wonder if they changed, the early Darts used Eaton valves.

Link to Dart Input on Construction

405HP_Z06

iTrader: (11)

The truth of the matter is that they probably use both, depends on who's got the best price and availability. The post you referenced states that Eaton and Basso supply most of the big name's, but it doesn't state what they use for the LS1 heads. All I know is what they tell me, the valves have no identifier to determine who manufactured them. Either way, they are quality pieces.

vettenuts

iTrader: (4)

I know I wrote down the numbers on mine, just don't remember where

405HP_Z06

iTrader: (11)

Update on a spring locator for dual springs on Dart heads. These will work with most dual LSx springs on the market, but please verify inner spring ID before assuming.

Dart part number: 2320051

or

Futral Motorsports part number: FMS-3988

Both have the following dimensions:

OD: 1.240
ID: .565
Spring ID: .652
Thickness: .060

I purchased them from Futral Motorsports because of price and availability. Allen was very helpful.

Bill Bowling

iTrader: (6)

I have a set of Dart 205's. Do you know if PRC Dual Valve Springs and retainers will work? I have them on my current heads and wanted to use them on my new Darts.

Bill

405HP_Z06

iTrader: (11)

I would call Alan Futral at Futral Motorsports, but I bet you will have the same issue I did. You will need new spring locators, but the springs, retainers, and locks should all work.