quote:

---

Originally posted by Matty-Tyler

hey dude, thanks for the tip, im looking at 17*7 and 17*9 now what size tyres do you run on the front and rear? also when you say back space do you know the off set? is it +33?
Ta Matty

---

My front tyres are 205/40/17 and the rears are 255/40/17. Not sure what that equates to in offset, I am not sure how you calculate it. They are custom made wheels, so the manufacturer was only interested in the front and back rim widths from the wheel centre line.

I think the rear wheel offset is +50. not 100% sure though.

Hi

Looks GREAT!

What length Eagle rods have you used in the Silvertop bottom end? I'm going NA so piston my choice may be different tho.

Looking at the US there seems to be a bigger range of the later Blacktop components (rods, pistons etc) so thinking I might be better going for these. As the crank is the same I'm assuming this will all fit into the Silvertop bottom end? Do they have the same deck height?

Keep the updates coming!

Paul,
My silver top is fitted with black top rods and pistons as the cranks are the same and the deck heights are the same. The heads as far as I am aware are interchangable too.

Thanks.

Yes, I'll probably update to a blacktop head once I have a look at how easily the cam tensioning hardware is to mofify to match the set-up for the Silvertop head. I'm thinking I'll be able to machine up a plate to be able to mount the silvertop tensioner to the Balcktop head (as the blacktop tensioner will foul the Silvertop water pump).

Why don't you just use a Black Top?

quote:

---

Originally posted by Mickas

Why don't you just use a Black Top?

---

Depends on what you want to achieve. The black top out flows the silver top in standard form. But the black top has very thin port walls, so with porting the silver top head can be made to out flow even a ported black top head.

So what porting figures have you got out of your Silver Top head?

quote:

---

Originally posted by Mickas

Why don't you just use a Black Top?

---

I don't want the Blacktop water pump arrangement plus engineering the later motor requires the later ECU which has the more complex PATS (Passive Anti Theft System).

quote:

---

Originally posted by Paul Dunstan

quote:

---

Originally posted by Mickas

Why don't you just use a Black Top?

---

I don't want the Blacktop water pump arrangement plus engineering the later motor requires the later ECU which has the more complex PATS (Passive Anti Theft System).

---

Why dont you like the black top water pump set up?

Just cause you use the later engine doesnt mean youuse the same engine management?