428 replies to this topic

[CocoPops]

Back to Nevs point on tyres. Is putting 305 wide tyres really the right answer? Doesn't seem right to me, but hey what do I know.

What size tyres did your Airbus have fitted?

Not even sure that had 305 tyres

[ArticMonkey]

Back to Nevs point on tyres. Is putting 305 wide tyres really the right answer? Doesn't seem right to me, but hey what do I know.

What size tyres did your Airbus have fitted?

Not even sure that had 305 tyres

The engineers must not of consulted the self taught master.

[The Batman]

i reckon remove boot and have 2 tullet silencers one above and one in normal position that should keep you quiet

[ArticMonkey]

i reckon remove boot and have 2 tullet silencers one above and one in normal position that should keep you quiet

Know a salesman who can sell Tullet by any chance?

[The Batman]

well i was gonna suggest 2bular but figured this engine will be done this year

 

2bular still have the quietest box to date

 

either that or get a few boost controlled fanny flaps in the exhaust and get some loft insulation in the boxes

Edited by The Batman, 16 January 2017 - 09:39 PM.

[CHILL Gone DUTCH]

i reckon remove boot and have 2 tullet silencers one above and one in normal position that should keep you quiet

Know a salesman who can sell Tullet by any chance?

I know of a 15% discount being offered of retail price from chris uk

[The Batman]

thats a huge discount that is

[ArticMonkey]

i reckon remove boot and have 2 tullet silencers one above and one in normal position that should keep you quiet

Know a salesman who can sell Tullet by any chance?

I know of a 15% discount being offered of retail price from chris uk

That's well cheap mate. Plus 20% vat and you have a winner!

[leevx2.2]

i reckon remove boot and have 2 tullet silencers one above and one in normal position that should keep you quiet

You reading my mind I was thinking of something like that

[smiley]

That's how one of the Dutch guy's did it.

 

 

Just the other way around in your case of course

Edited by smiley, 16 January 2017 - 11:34 PM.

[Nev]

get some loft insulation in the boxes

 

I'm thinking of experimenting with stuffing steel scouring pads/material in the next exhaust. Probably sounds crazy to many of you as you'll only see it as a household product, but it could work really well at randomly diffusing the gas and possibly absorbing a good deal of noise as a result. Chief advantages that I can see are:

 

1. Won't melt (no re-stuffing required).

2. Very cheap.

3. Far less prone to being blown apart as they have solid structure that resists shape change (try pulling one apart and you'll see what I mean).

 

Something like this: http://www.ebay.co.uk/itm/12-x-Steel-Scouring-Sponges-Lightweight-Silver-Craft-Projects-Washing-Cleaning-/111038099183?hash=item19da62eeef:g:HR0AAOxyzHxRTcqa or this:  http://www.ebay.co.u...3IAAOSwPcVVqLOZ

 

I think it will help if the profile of the steel wool is rectangular (rather than round wire), this will really help bounce the gas around in 1000s of directions.

Edited by Nev, 17 January 2017 - 08:46 AM.

[Nev]

Back to Nevs point on tyres. Is putting 305 wide tyres really the right answer? Doesn't seem right to me, but hey what do I know.

 

What's your solution to getting more drive wheel traction then?

 

There are only 2, more rubber or stickier rubber. And this is why powerful cars roll out of the factory with wide and sticky tyres.

 

Ignoring the problem is really unwise as I found out to my cost 6 years ago. Even now with 285 tyres my car is scarey, spinning in 1st, 2nd & 3rd gear up to 120 MPH is no joke. This is why I would really stress to Lee to address the problem if he can, and why I'd suggest more than 285 width tyres if he can possibly manage it.  

Edited by Nev, 17 January 2017 - 09:07 AM.

[SteveA]

Like most factory mega powered cars surely TC has to be the answer.

[Nev]

Like most factory mega powered cars surely TC has to be the answer.

 

Yep, I'm all for it personally, maybe Lee can activate it with his ECU (I'm not sure what ECU he has, but maybe it has this function already)?

 

However TC only stops you spinning up, it doesn't address the core problem of not having enough traction in the first place.

 

Edited by Nev, 17 January 2017 - 10:29 AM.

[CocoPops]

Back to Nevs point on tyres. Is putting 305 wide tyres really the right answer? Doesn't seem right to me, but hey what do I know.

  What's your solution to getting more drive wheel traction then?   There are only 2, more rubber or stickier rubber. And this is why powerful cars roll out of the factory with wide and sticky tyres.   Ignoring the problem is really unwise as I found out to my cost 6 years ago. Even now with 285 tyres my car is scarey, spinning in 1st, 2nd & 3rd gear up to 120 MPH is no joke. This is why I would really stress to Lee to address the problem if he can, and why I'd suggest more than 285 width tyres if he can possibly manage it.

My car (400) has 285 tyres and that was deemed acceptable by Lotus? What about McLaren/Porsche/Ferrai etc? Also, is it not the torque that causes wheelspin rather than power? Plus, how does your car ever reach 120mph? It's never been on track?

[Nev]

Hi Lee,

 

Are you installing hydraulic or mechanical lifters?

 

Also, what is the limiting factor/item on RPM please - is it piston speed?

 

 

Edited by Nev, 17 January 2017 - 11:12 AM.

[Exmantaa]

The 2.4 crank has a 98mm stroke, so you can do the math...

[Nev]

The 2.4 crank has a 98mm stroke, so you can do the math...

 

Doing the math would just tell me the mean piston speed at any random RPM I chose. It wouldn't tell me what the consensus on safe mean piston speed is for whatever rods/pistons/bearings/crank he is using. Hence my question. It sounds like the components he's bought are pretty expensive, so maybe the limit is unusually high.

 

Hopefully/presumably the Americans who use these parts do know (from deliberate or perhaps (accidental!) destruction testing).

Edited by Nev, 17 January 2017 - 12:38 PM.

[siztenboots]

I would argue the rod ratio and piston+rod weight are just as important to calculate forces on the parts , versus increasing risk of failure at more rpm.

[FLD]

On the rubber debate.... You can go too wide. When I was drag racing you could get very wide tyres but if the weight of the car was low the traction was reduced compared to a smaller tyre. I'm not sure where the cut off is or if its calculable but it's something to be cautious of when saying 'you need more rubber'. Sent from my iPhone using Tapatalk