911 Cooling Shrouds - Improving Internal Air Distribution

[SuperRSi]

Sandeep,

Where did you order your 911 fan diverter from?

Thanks,

Randy

[Sandeep]

Lucky find on EBay

Sandeep

[Sandeep]

I had some spare time last night so I thought I would try Wally's horizontal tin mod on 3-4 bank only to see what a difference it would make.

I made a piece of tin 7" long by 4.5" wide and cut it in such a way that one 4.5" side runs parallel with C/L of #4 cylinder and the other 4.5" side runs parallel with #3. The attachment point to the case is the 2 - 6mm holes for factory tinware on top of the case under the shroud.

I then made a U shaped hole in the center of the tin to allow some air to get between #3 and #4, but the majority of the air would go over the cylinders and to the head.

Well ... this decreased the temps of #3 and #4 by about 15F :agree: So now the differance between 1-2 and 3-4 is 1-2 runs about 20F cooler on average than 3-4. I guess the cylinders DO catch the majority of the air flowing across them ... thanks Wally ! :agree:

I am not sure how this will affect oil temps (seemed fine on my testing run) or if this will create hot spots on 3-4 cylinders due to the decreased air to the cylinders.

I have about 40 logs now of different senarios ... 5MB each ... big files.

I think I may be at the end of these mods as the temps seem quite acceptable for the street. Next step is to go to the track ... no track days coming up till September though the spaces are all filled.

Sandeep

[Sandeep]

Here's my datalog from last night ... overall, I'm very happy with the results and I think this is the end of testing for me. Next step is to get out to a Driver's Ed but that will not be until September.



Now to finish collecting the parts for my Turbo project

Sandeep

[Bad bug]

Sandeep you can't end the project now i think that 911 shroud will perform as well as the DTM shroud.

[big daddy]

That's right Sanddeep you cannot end now. You have done a wonderfull job and I am sure we are all excited about the finished product. :agree: I am in the Brampton area right next to ya. I have spoken to Jamie about you and I cannot wait to meet you. I am also running a T4
2.6 with Sharp Shroud. When can we meet???? I am off Sandy Beach which is off Brisdale one street over from you. U Say When & I am ready.
Thanks............




Big up yardie...........Mandeville area.

[Bad bug]

Hey Yardie,
Glad you could join in. How does that 2.6ltr run/feel,i am also thinking of running on in the near future. I am in portmore St Catherine. Do you have any problems with head temps and the sharpbuilt shroud. Who built your engine what's the top speed.