Thanks for all the input, but I really never got the answer I was looking for. I know I put a lot of unnecessary weight into this chassis when I built it. I was hoping to get a ball park number on what I might save by going to the minimum spec tube and doing it by the rules,IE smaller tube where it is alowed, and an all round tube cage. I know Cudabin is 250 lighter than me, with very similar components. Other cars out there for comparison ought to give me enough info to make a solid decision on weather it is worth it. If I can dump 250 pounds with the selection of the right tube and some parts, like struts, then It would be worth it to me as that would get me a solid .020 gain at this level. So anyone with comparable rides, please speak up.

I would look at the cost going bigger on the engine vs lighter on the chassis to see which would give the best bang for the $$$. BS that's just some advice I wish I would take myself when ever I started a new project.After all the $$$ spent that is double time I finish what I plan on it being,I always end of asking myself was it worth all the $$$ and time for so little gain? And the answer is always NO,but I always made the same mistakes over & over. I know better,but the racer in me has yet to learn that,and the racer always has the say.
Good Luck with which ever you chose,if it were myself I would end up doing both!

PS This is a question only,you car runs very fast now so it must be working well do you think it will handle another 100 Horse-Power and still work well?

I think you would be better off selling your existing car complete and buying the car you want. I know a few guys that have re-done the chassis looking to save weight or update to next SFI Spec and they have a common theme. They wish they would have sold the existing car complete (which were all great working cars) and started over or bought a new 'to them' used roller. Alot of nice cars out there on the cheap right now.

That is a light megablock you have there. All of them I have weighed including an older ones were just under or north of 300lbs. The World blocks being the heaviest at 310ish. My KB lowdecck block was 163. Just FYI from my experiences. I hear the Indy block is even lighter, heard some crazy numbers like 125 or so.

Now that is a big difference, could be the bathroom scales are reading light, it's all I have that will weigh something that heavy. Mega block was cast around 12 years ago, does this qualify as an early casting?
Used as a tool for comparison only, does the 85lb difference seem reasonable?
As earlier, we only saved 70lb swapping from the 528 mega block to the 572 KB. Everything else on the car was the same, barring the sump.

Not to sound bad in any way, so please do not take offense, but if I was at your age I would probably ask myself how much longer I might be racing and is all the expence of trying to go two tenths faster really worth it. As mentioned above your car is fast now so unless your competing for a national tile................? A member once told me on one of my posts that I was over thinking things to much, I think he was right. JMHO so again please do not take offence.

Superfreak

Greg
In your opening post, you said you had steel doors, surely glass doors would save a fair bit of weight and do you have lexan or glass in the car ?
Mick