34mm Restrictor Solutions?

The lead seal is not a new regulation, it is 'the' regulation. Most regional events don't have access to the equipment to do it. I believe Canada requires the same. I paint the housing, screw, clamp..whatever I can. If sealed we dab the seal. I usually kept a close eye in service just so there could be no shenanigans and competitors don't have to worry what the other guy was doing.

I didn't see anything about lead seals, but definitely about the needle screws - below:

3.13.2 Restrictor Specifications
1. All turbocharged cars listed as requiring restrictors must
be fitted with a restrictor fixed to the compressor housing
unless the compressor air inlet internal diameter is equal
to or smaller then the required restrictor internal
diameter.
2. All air used for feeding the engine must pass through
this restrictor.
3. The restrictor must be maintained for a minimum
distance of 3 mm measured downstream of a plane
perpendicular to the rotational axis situated at a
maximum of 50 mm upstream of a plane passing
through the most upstream extremities of the wheel
blades (see Appendix B drawing 254-4).
4. The required diameter must be complied with regardless
of the temperature conditions.
5. For the installation of the restrictor it is permitted to
remove material from the compressor housing and to
add material for the sole purpose of attaching the
restrictor onto the compressor housing.
6. The restrictor must be made from a single material.
7. The restrictor may be pierced solely for the purpose of
mounting and sealing, which if done must be carried out
between the mounting screws, between the restrictor (or
the restrictor/compressor housing attachment), the
compressor housing (or the housing/flange attachment)
and the turbine housing (or the housing/flange
attachment) (see Appendix B drawing 254-4).
8. In case of an engine with two parallel compressors, each
compressor must be limited to a maximum intake
diameter of 22.6 mm.
9. Diesel engine: For vehicles with diesel engines, the
restrictor must have a maximum internal diameter of 35
mm and an external diameter of 41 mm.
10. Championship Options - A championship may elect to
require tighter scruitneering control of the restrictors. If
so stated in the championship regulations, the following
rules also apply: The external diameter of the restrictor
at its narrowest point must be less than 38 mm, and
must be maintained over a distance of 5 mm to each
side.The mounting of the restrictor onto the turbocharger
must be carried out in such a way that two screws have
to be entirely removed from the body of the compressor,
or from the restrictor, in order to detach the restrictor
from the compressor. Attachment by means of a needle
screw is not authorized. The heads of the screws must
be pierced so that they can be sealed.
11. Restrictors in Group N cars must meet all Group N
regulations.



Edited 1 time(s). Last edit at 08/18/2011 04:54PM by vbares.

Section 7....wired and sealed. You wrap the safety wire thru the screws and then slip on a lead seal and crimp. Hurst has the kit.

is wired and sealed better for the competitor? less likely to have it fall off? or more of a "it hasn't been tampered with" for the techs ?

Quote
A1337STI
is wired and sealed better for the competitor? less likely to have it fall off? or more of a "it hasn't been tampered with" for the techs ?

Its proof positive if it HAS been tampered with...

Of course some well establish, high end preparation shops have been reported frequently enough to posses wire and lead seals and a goodly collection of paints......but Shirley I cannot comment.

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John Vanlandingham
Sleezattle, WA, USA

Vive le Prole-le-ralliat

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CALL +1 206 431-9696
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Quote
john vanlandingham

Quote
A1337STI
is wired and sealed better for the competitor? less likely to have it fall off? or more of a "it hasn't been tampered with" for the techs ?

Its proof positive if it HAS been tampered with...

Of course some well establish, high end preparation shops have been reported frequently enough to posses wire and lead seals and a goodly collection of paints......but Shirley I cannot comment.

I haven't heard of that, I suppose it is possible though. We do spot checks along the route and impound the cars at finish so I really doubt if people try it.

FIA checks didn't stop Toyota.

How does the lead seal work if you have a turbo fail at the event. Do you need to have it re-inspected or re sealed before exiting service?

Toyota didn't swap out turbos, they engineered them to pass tech and still be non-compliant. Not really the same thing.

If you swap out a turbo in service it should be inspected by tech at that time. Not all events have the manpower to do that. I usually hang around service and watch. Hurst does the same.

There is never a sure way that humans can't find a way to cheat, its in our nature. NASCAR, WRC and F1 have amazing tech procedures and budgets to support them and still people get caught cheating or out of compliance (I think there is a difference...intent).

Toyota used a combination of mechanical capabilities in the restrictor plus, and here's the real trick, that extra air was enabled by installing the intake hose. So, during inspection - all aspects passed even during the rally...genius!

Yeah, as soon as the 1987 Audi 4k with locking diffs and bitchin suspenders starts threatening the front runners - I'm sure everything will be scrutinized

Quote
vbares
Toyota used a combination of mechanical capabilities in the restrictor plus, and here's the real trick, that extra air was enabled by installing the intake hose. So, during inspection - all aspects passed even during the rally...genius!

Yeah, as soon as the 1987 Audi 4k with locking diffs and bitchin suspenders starts threatening the front runners - I'm sure everything will be scrutinized

Atta boy, give 'um hell !!!