2B and 2F specifics

[NitroDann]

But the rules clearly say you can modify it so cutting it open and porting it is fine.

Thats like saying that people who modify their cars at all are cheats.

Isnt the point to build the quickest car within the rules, if it meant no non factory ITBs it would say that right?

Dann

[Magpie]

Isnt the point to build the quickest car within the rules, if it meant no non factory ITBs it would say that right?

Dann

Yes if you have the money, budget, drivers, sponsors etc. Dann this is motor sport not cycling, therefore not everybody is cheating.

[NitroDann]

I honestly do not follow, do the rules allow ITBs on a stock manifold or not?

What about a ported stock manifold would that be ok?

What about a bigger throttle boy is that ok?

What about a better intake is that ok?

Dann

[Magpie]

Dann, I have no idea so I will defer to those who know better. My suggestion would to be contact a per-log book inspection for the type of car you are asking about and ask the question.

[MattR]

I honestly do not follow, do the rules allow ITBs on a stock manifold or not?

What about a ported stock manifold would that be ok?

What about a bigger throttle boy is that ok?

What about a better intake is that ok?

Dann

If the rules do not specifically allow the modification, then no you cannot do it. It is written as clear as day in the 2f rules preamble on the cams website. To throw this back at you why don't you do some research before asking these questions like you say to the newbies on the forum.

[NitroDann]

I know the answers to my quetions, im simply making a point.

Dann

[Brian]

All,

I just want to clarify the Power to Weight rules in Modern sports car:

Modern Sports cars uses the Power and weight figures as published by redbook to calculate the PWR of the standard car. This PWR is used to determine the class for 2B cars (non Forced Induction). Your car is eligible to run in that class provided you do not increase capacity more than 2% or reduce weight by more than the % figures in the rules. If you do increase capacity or reduce weight more than the minimum then you will be moved up a class.

This is very different to what is currently being done in prodsports.

The objective for Modern Sports Cars is to make it more simple to determine your class and does not require a dyno sheet. It makes regulating the category much easier.

Please check out the draft regulations on the Modern Sports Car website.

Cheers

Brian

[Magpie]

Thanks Brian

[Brian]

Also this is the official answer regarding ITB on 2F cars:

The 2F rules state "The inlet manifold may be modified by the removal of metal provided the original component is able to be identified." It does not say anything about the throttle body, therefore the throttle body must remain standard. There is no scope to change from a single throttle body to ITB.

If you want to run ITB then you can under the 2B rules.

Cheers

Brian

[NitroDann]

yeah thanks for that,

Air cleaners and their housings are
free. The inlet manifold may be modified by the removal of metal provided the original component is able to be
identified.

So this means that the intake pipe MUST be standard? So only the airbox and filter itself may be changed?

Cheers,
Dann

[MattR]

Yes, as the rules state, unless it is specifically mentioned that a component may be modified then it must remain as standard as supplied by the manufacturer for a 2f car. 2ballows some more freedoms in respect to what may or may not be modified from standard as supplied by the manufacturer.

[gslender]

Air cleaners and their housings are
free. The inlet manifold may be modified by the removal of metal provided the original component is able to be
identified.

So this means that the intake pipe MUST be standard? So only the airbox and filter itself may be changed?

Is that right? Can someone post a photo of a 2F engine bay and show me that the MAF is standard for a NA6 (flappy type) and only the air filter and housing has been changed ... which means the intake resonance chamber and all that plastic pipe work running prior to the air cleaner housing must still be installed as per factory?

Far out that class is restricted in weird ways... and yet you are free to change the entire ECU and exhaust to anything you like !?

G

[gslender]

Here is a so called 2F MX5 and the intake sure doesn't look like it adheres to that rule regarding intakes !?

http://www.pscraq.com.au/forum/viewtopic.php?f=8&t=821

So is this not allowed or is the rules grey and/or up for bending?

G

[NitroDann]

Right.

The whole point Ive been making all along.

I think the rules are fine as everyone has to abide by the same rules however clarification needs to be made on a bunch of them, the forums are the perfect place because its permanent and public.

Dann

[gslender]

I assume the argument is that the original plastic pipe work from the TB onwards is all part of the housing for the air cleaner - hardly true in the motor mechanic definition, which is why I started asking for details on what is and what isn't allowed.