30 replies to this topic

[Nightrain]

nope. thats cooper s forged rockers you do that to isnt it? never heard anyone do that to the pressed steel ones.

No you run a bead of weld along the top edge of the pressed steel rockers.

[liirge]

nope. thats cooper s forged rockers you do that to isnt it? never heard anyone do that to the pressed steel ones.

No you run a bead of weld along the top edge of the pressed steel rockers.

THought so, as doing it to the Cooper s ones wouldnt do anything.

[Clubber Lang]

I think i read in vizzards book about welding the top seam on the pressed steel rockersif not there i read it somewhere. Can't see how you could weld the cooper forged rockers? regards Steve

[navyseal]

How did minisport do in terms of delivery i am familar with there customer service and delivery times!

is that another unsatisfied minisport customer i hear? dont mention them to me, they are NEVER getting an order from me ever again.

nope. thats cooper s forged rockers you do that to isnt it? never heard anyone do that to the pressed steel ones.

No you run a bead of weld along the top edge of the pressed steel rockers.

ah yes sorry forgot about that.

[Racer_Pete]

Hello pete good to hear from you on this one!
How did minisport do in terms of delivery i am familar with there customer service and delivery times!
Did you order online?
im sure the 1.3 will be ok, especially if your not to worried about revving to get power

MiniSport E-mailed me saying they didnt have them in stock and will be about 8-10days, think they arrived at the workshop about eight days after ordering by courier, didnt have any problems with them. they are all built up with the rockers and pedestals attached on the shaft, so ready to be fitted out the box. Although ill be needing some of the pedestal spacers for them to seat in the pushrod cup propley due to the CR. I think 1.3:1's would be ideal with the SW10 just to get a little more lift.

[liirge]

Ok, well i might give them one last chance to get things right.
Cheers pete
Yer later on i'l post the figures comparing, the lift of different ratios and what there closest to on normal rockers...i get it.

[liirge]

As promised here are the Figures: (these isnt the "07" cam, but i cant imagine there is a huge difference)
SO Valve lift figures:

SW10: I 0.364 E 0.364
SW10 + 1.3:1 I 0.378 E 0.378 - Equivalent valve lift to on Normal Rockers: Mini Manias 286 by Elgin
SW10 + 1.5:1 I 0.436 E 0.436 - Equivalent valve lift to on Normal Rockers: VP9C By APT

286Scatter: I 0.394 E 0.405
286Scatter + 1.3:1 I: 0.409 E: 0.421 - Equivalent valve lift to on Normal Rockers: 296 or 296Scatter by Kent
286Scatter + 1.5:1 I: 0.472 E: 0.535 - Equivalent valve lift to on Normal Rockers: Mini Manias 310 By Elgin

*All figures in inches, normal rockers are at a given ratio of 1.25:1, Equivalent means closest match of both Intake and Exhaust.
Going to be interesting for you mate, going around in what basically is a 296 scatter!

[Nightrain]

You've got to remember here, your only comparing lift. The duration of the cam isn't effected, zero lift is still zero lift whether multiplied by 1.25 or 1.5 rockers. Duration has more to do with a cams characteristics than lift.

[liirge]

No of course the duration is very important, thought i would just put what the lift is closest to in terms of cams without rockers, not saying that they are going to perform the same way as what they're closest to, because there not, due to the reason mentioned above.

[Racer_Pete]

Thanks for that, made me think about the 286sp lol, I think ill stay with the sw10 with the 1.3:1's for now...should be more than enough, Liirge how deep are your pockets going to be in the head? & How many mm how you got in the head between the valve and the head face?

[liirge]

Pete, Yer the SW-10 on 1.3's will be a nice cam with quite a racey profile.
The pockets, im not sure on yet i would imagine somewere in the 3mm range, i will measure them when i get the block back, same as the Cylinder head im not sure how much i have,
Pete What Springs are you using, as i dont want anything excessive to wear my Valvetrain down and create frictional losses, and i REALLY dont want valve bounce

[Racer_Pete]

Pete, Yer the SW-10 on 1.3's will be a nice cam with quite a racey profile.
The pockets, im not sure on yet i would imagine somewere in the 3mm range, i will measure them when i get the block back, same as the Cylinder head im not sure how much i have,
Pete What Springs are you using, as i dont want anything excessive to wear my Valvetrain down and create frictional losses, and i REALLY dont want valve bounce

Oh right, Ive got the machinest to pocket mine by 3.5mm deep, as my pistons are 5mm to the first ring, Only thing is that with the head im using it has been skimmed soo much i think ive only got about 5mm of space between the valve and head surface, but im going to be using a cometic .040" head gasket which is 1mm compressed, which should give me just enough for the valves not to hit with 1.3:1's.. ill work it out propley when the head comes back though just to make sure!...
Im going to be using 180lb double springs, with that cam, I think swifty recomend them when using the sw10 to.

[liirge]

Hmm i think that 5mm is quite small, your definitely going to need that head Gasket thickness, looking at my head just now ive noticed they seem to have machined alot of the top of the head the 12g295 writing is nearly completely flattened, so those pedestal spacers might have to be used but i'l come to that on the re-build.
the 180lbs is exactly what i was looking into aswell, so glad two of us are going that route.

[jaydee]

Im gonna use 180s too with the new cam but stick with the standard rockers. Regarding the head, now im having some problems with machine shop..bloody august!

[liirge]

Talking of that i've just had an email from my engineer, asking for what Bore to piston clearance i would like, i know there needs to be a little, but i dont know what it should be, so what is the optimum clearance?