I agree with Tom re: header wrap. I read an article recently that said many
of the people who have been using the wrap are experiencing cracked headers
from all the heat being retained and the many, many heat cycles of using the
wrap in a daily driver. Too much heat for the headers to take.
However you can use a heat shield on the starter. I will be building one out
of Aluminum when I take my engine out to repalce the tranny.
'66 Mike
However you can use a heat shield on the starter. I will be building one out
of Aluminum when I take my engine out to repalce the tranny.
----- Original Message -----
From: Thomas Walter <ra0618@email.sps.mot.com>
To: ,Datsun <datsun-roadsters@autox.team.net>
Sent: Monday, June 12, 2000 8:30 AM
Subject: Re: More Starter Questions
> You're welcome.
>
> I am NOT a big fan of header wrap for daily drivers. Idea of the
> header wrap is to keep the heat in the header, which helps improve
> the exhaust flow. While you may increase the power 1%, there are
> too many tradeoffs for the roadster.
>
> Problem with the wrap is it will keep the heat, moisture, dirt,
> and everything else up against the header. With the extra heat
> you are also more likely to warp the exhaust manifold flange.
> Usually the header will die an early death.
>
> If you RACE, rebuild the engine every season, and are looking
> for the ultimate tricks.... header wrap might be a good deal.
> Other wise just leave it off.
>
> [Only time I would be tempted to use the wrap... on that darn
> Chevy CAST IRON exhaust manifold that runs along side the starter
> on the older V8 vans.]
>
> I'd leave the nice stainless steel header as is, install the
> 2000 starter.
>
> If you 2000 starter get cooked too often, you could fabricate
> a heat shield to block radiated heat from the header.
>
> I SUSPECT that removing the "triangle piece" might actually help
> air flow in that region around the starter. Only way I would know
> for sure is to hook up a manometer (for measuring static pressure).
> One tube by the starter, the other tube in the wheel wheel. Plate
> in place. See how much static pressure difference between the two
> locations are. Just a thought.
>
> Cheers,
>
> Tom Walter
> Austin, TX
>
>
>
>
>
> > Hi Tom,
> > As always, great information. Thank you. A question...I have a 67.5
> > 1600. I have a very nice set of stainless steel headers. I am in the
> > middle of a frame off so I purchased the short starter from the 2000. I
> > am told this will help to minimize cooking my starter. I also purchased
> > a package of exhaoust insulating wrap (made by Cool It Thermo-Tec). One
> > of my neighbors and a fellow car rebuilding buddy has suggested that I
> > wrap the header with this insulating wrap. What do you think? Will
> > this help my starter and roast something else? Will it damage my snazzy
> > headers? Any thoughts suggestions will be appriciated.
> >
> > Guy
> > Tempe, AZ
|