what to do

Site Subscriber Joined: 02 Oct 2004 Posts: 1575

right seems as though I have a spare valver engine sorted the leak so the question is do I rebuild it to a higher spec engine or do I sell it, discuss Exclamation

Forum Moderator Joined: 02 Mar 2004 Posts: 19978

rebuild

Site Subscriber Joined: 02 Oct 2004 Posts: 1575

what you reckon mate blue print or something else. The wife wont allow me to spend a large sum on rebuliding the engine though.

Forum Moderator Joined: 02 Mar 2004 Posts: 19978

if your doing it yourself then aye of course. What category do you run in and are there any restrictions?

Site Subscriber Joined: 02 Oct 2004 Posts: 1575

I run in modified production so, if I had the funds I could go full touring car mode but that is just not an option. I basically can do just about anything

Forum Moderator Joined: 02 Mar 2004 Posts: 19978

well that makes things easier.

Whats the budget and what do you currently run?

Site Subscriber Joined: 02 Oct 2004 Posts: 1575

not set a budget yet and I'm using the standard box so I'm gona be limited on the hp due to not wanting to change the box. the engine on the bench is the standard plennum(sp) engine with standard ECU/ ignition unit. how easy/difficult is it to make throttle bodies I could make them up I think!

Forum Moderator Joined: 02 Mar 2004 Posts: 19978

the box isn't the limiting factor, as you can pop it with standard power so thats not really an issue if you behave and don't just do burnouts every time you start.

You need to remember the block etc will prob need machining, so theres that to take into account.

Throttle bodies, knock up a manifold and if you do a decent one then you can make more and sell them.

TB's themselves can be had pretty cheap, no point in making them, but if you must decent thick walled tubing then just scour scrappies for throttle spindles and plates.

TB's on a stick engine set up properly should net a good extra 15bhp and a much better torque spread.

If you time the cams properly then even more so.

Headwork/cams is the next logical step really.

Problem is the cash as always, if you sort out the bottom end then thats 1 thing, as you can plonk on a new head etc later on.

Site Subscriber Joined: 02 Oct 2004 Posts: 1575

right thats a start then lighten and balance then sounds like the way to go Question

I try not to do wheel spin as you lose time and time is what its all about.

Site Subscriber Joined: 28 Jan 2005 Posts: 3547

lightening and balencing is easy, im doing my other engine at the moment, im practising on my bent con-rod at the moment, the starting weight was 729g its down to 669g and i havent finished yet, and its all with in limits, i'll post pics of it at the moment, if you want them.

Site Subscriber Joined: 02 Oct 2004 Posts: 1575

yeah get posting

Site Subscriber Joined: 28 Jan 2005 Posts: 3547

Heres pics as requested:

Showing the bent con rod against 2 straight edges, I have marked out in chalk where i am going to grind away:

Before i started weight is 729g at this point:

And now, not finished, but the weight is 669g:

Forum Moderator Joined: 02 Mar 2004 Posts: 19978

how did you bend it?

don't touch the cap as although cast irons not notch sensitive it still swells and stretchs.

You can grind the small end casting flats away until its round.

You balanced them end to end?