RE: [DML] Re: Turbo question
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

RE: [DML] Re: Turbo question



Don't overlook something simple. The cartidges of turbos are usually clamped 
to the turbine housing (the big heavy casting that bolts up to the exhaust 
manifold or "up" pipe) using a v-band. The mechanical advantage of a v-band 
style clamp is tremendous and it takes very little torque on the adjusting 
screw to really clamp the cartidge too tightly to the turbine housing. If 
someone honkered down on those adjusting screws because "they felt loose" 
then the turbine blades could actually contact the turbine housing and 
refuse to turn. This can be checked by removing the outlet hose from the 
compressor and turning the compressor blades by hand. They should turn 
easily and smoothly. If there is resistance or any roughness it would be a 
good idea to inspect the turbine blades for contact damage and also to back 
off on the v-band adjusting screw until things turn smoothly again. When 
properly adjusted the screws on a v-band clamp will feel very loose. They 
never, ever, get "tight" when properly adjusted.

-Joe kuchan


>From: "michael townsley" <townfour@xxxxxxxxxxxxxx>
>Reply-To: dmcnews@xxxxxxxxxxxxxxx
>To: <dmcnews@xxxxxxxxxxxxxxx>
>Subject: RE: [DML] Re: Turbo question
>Date: Mon, 26 Jul 2004 23:01:07 -0400
>
>( Moderator's note: www.turbonetics.com is a good turbo source. They own 
>the Rajay name now and service and sell them. The Rajay is the turbo used 
>on the BAE single turbo kits. www.turbocity.com is another source for 
>rebuilds and rebuild kits.)
>
>
>I have an 83 with an early set of island turbos i.e. no cats...I have not
>been able to figure out if they are working right or not. When I accelerate
>or rev up the engine...the boost gauge drops to zero and recovers very
>slowly...also I get a putt putt sound when accelerating from a stopped
>position and it has pretty slow to pick up. I am not sure whether or not
>these units have any oil cooling at all...I have not seen any information
>that says they do nor have I noticed any oil lines traveling to them.
>
>I have not been able to find anyone I would trust to look at them...PJ 
>Grady
>told me he does not work on them any more and Calloway (Turbo Charged)
>Corvettes which is nearby also would not touch them ... additionally I
>contacted this woman Eleanor who used to market the kits after her husband
>passed away and she sent me some specification info but could not recommend
>anyone who could service them in New England...I have no idea whether these
>units are helping or hurting the car's performance.
>
>Sincerely,
>
>Mike
>
>Michael W. Townsley
>2 Fox Hill Road
>Old Saybrook, Connecticut 06475
>860 304 2412
>townfour@xxxxxxxxxxxxxx
>
>
>-----Original Message-----
>From: Chris Shepherd [mailto:chrisau79@xxxxxxxxx]
>Sent: Monday, July 26, 2004 6:44 PM
>To: dmcnews@xxxxxxxxxxxxxxx
>Subject: Re: [DML] Re: Turbo question
>
>I disagree. I've got an "Island" setup on my car and it has been on the car
>for 11 years. I've been the owner for 10. I pull into the garage and turn
>the engine off. I pull into a parking place and turn the engine off. The
>only time the turbos' come into play is when I'm passing someone or going 
>up
>a really steep grade at elevation, the Siskiou Summit for example. The rest
>of the time they are just idling along with no boost. Yes they are spinning
>but they are not generating any heat greater than the exhaust passing
>through them.There is no way I know of to cool them below the exhaust temp.
>before shutting the engine off anyway.
>
>David Teitelbaum <jtrealty@xxxxxxxxxxx> wrote:What I have seen, usually on
>race cars, is an accumulater type system
>that pumps up oil pressure while the motor is running and holds it so
>when you first start the motor up it supplies oil under pressure until
>the motor's oil pump can. They aren't usually filtered because of the
>large flows required. The oil also performs another important
>function, it cools the bearings, which is why you NEVER shut an engine
>equiped with a turbo right down, you should wait for the turbo to
>spool down and cool a little. If you don't the oil literaly cooks. It
>gets so bad that the drain cokes up and gets plugged up with burnt
>oil. When that happens you don't get a full flow of oil to the
>bearings and they burn up. You also MUST change the oil 2X more often
>with a turbo. It is also a good idea to use synthetic, it is more
>durable with the high temperatures. Even though synthetic is expensive
>the oil is cheaper than the turbos!
>David Teitelbaum
>vin 10757
>
>
>-- In dmcnews@xxxxxxxxxxxxxxx, "B BENSON" wrote:
> > > Something that I've noticed with every single turbo >set up that I've
> > > seen installed is dirty oil being used to lube the >turbines. Weather
> > > it's a "T" inline from the oil pressure sending unit, or a >pickup
> > > line pulling oil directly from the sump. Why? If you >want to prolong
> > > the life of the turbos, retrofit your car to supply >CLEAN oil to the
> > > turbos.
> > >
> > > -Robert
> > > vin 6585 "X"
> >
> >
> >
> > Where else do you think you'd get oil from? The types of turbos used
>in the
> > kit's that were offered for DeLoreans are the type that float the
>impeller
> > shaft in oil which is flowing through holes in the bushing
>surrounding the
> > shaft. The life of that bushing can be measured in seconds if not
> > milliseconds if oil flow is inadequate or disrupted when under
>boost. Trying
> > to install filtering up stream of the turbo or trying to design a
>separate
> > source for the oil shouldn't even be considered as a part of the system.
> >
> > Bruce Benson
>
>
>
>
>To address comments privately to the moderating team, please address:
>moderators@xxxxxxxxxxx
>
>For more info on the list, tech articles, cars for sale see www.dmcnews.com
>
>To search the archives or view files, log in at
>http://groups.yahoo.com/group/dmcnews
>Yahoo! Groups Links
>
>
>
>
>
>
>
>__________________________________________________
>Do You Yahoo!?
>Tired of spam?  Yahoo! Mail has the best spam protection around
>http://mail.yahoo.com
>
>[Non-text portions of this message have been removed]
>
>
>
>
>To address comments privately to the moderating team, please address:
>moderators@xxxxxxxxxxx
>
>For more info on the list, tech articles, cars for sale see www.dmcnews.com
>
>To search the archives or view files, log in at
>http://groups.yahoo.com/group/dmcnews
>Yahoo! Groups Links
>
>
>
>
>
>
>
>
>
>
>To address comments privately to the moderating team, please address:
>moderators@xxxxxxxxxxx
>
>For more info on the list, tech articles, cars for sale see www.dmcnews.com
>
>To search the archives or view files, log in at 
>http://groups.yahoo.com/group/dmcnews
>Yahoo! Groups Links
>
>
>
>
>

_________________________________________________________________
Is your PC infected? Get a FREE online computer virus scan from McAfee® 
Security. http://clinic.mcafee.com/clinic/ibuy/campaign.asp?cid=3963




To address comments privately to the moderating team, please address:
moderators@xxxxxxxxxxx

For more info on the list, tech articles, cars for sale see www.dmcnews.com

To search the archives or view files, log in at http://groups.yahoo.com/group/dmcnews 
Yahoo! Groups Links

<*> To visit your group on the web, go to:
    http://groups.yahoo.com/group/dmcnews/

<*> To unsubscribe from this group, send an email to:
    dmcnews-unsubscribe@xxxxxxxxxxxxxxx

<*> Your use of Yahoo! Groups is subject to:
    http://docs.yahoo.com/info/terms/
 



Home Back to the Home of PROJECT VIXEN 


Copyright ProjectVixen.com. All rights reserved.

Opinions expressed in posts reflect the views of their respective authors.
DMCForum Mailing List Archive  DMCNews Mailing List Archive  DMC-UK Mailing List Archive

This site contains affiliate links for which we may be compensated