HOW TO DO AN ADVANCED SEARCH.

Mon Jul 08, 2013 3:56 pm by Admin


For the benefit of 944Hybrids users there are two search functions available for you to use.
The purpose of this sticky is to explain the "Advanced Search" function because it is much more powerful and is the best choice when researching information.

When you log on to the site a list of options is shown in a line at the top of the page. One option is labelled "Search", use this option (NOT the search box lower down on the right).

After you click on the upper search option, a drop down box appears. At the bottom of this box is a radio button marked "Advanced …

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I need to replace my radiator

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I need to replace my radiator

Post  acorad on Mon Nov 07, 2011 4:09 pm

I know this has been discussed before, I've searched the whole site and read all the threads. But I'm still not fully ready to proceed...

It seems my 16" tall RH/Ron Davis radiator has scraped the pavement one too many times and finally gave up the ghost so I need to replace it. Hopefully with something not so tall such that it doesn't get scraped so much.

That RH/RD rad worked great, it only struggled when the A/C was on in stop-and-go traffic.

W/o the A/C on it never got above ~175F, wit A/C in traffic it could get to ~240F.

I'm pretty sure the rad temps would have been a lot cooler with the A/C on if I'd had a 2nd fan in front of the condenser pushing air into it, in addition to the existing puller fan behind the rad.

I wonder if an OEM 14" rad would be enough with a pusher fan in front and puller fans behind?

Is there anyone running the 14" OEM 951 rad with LS1 and A/C?

Is anyone running any other 14" rad with LS1 and A/C?

If I do need to use a rad taller than 14" can anyone tell me or show me with pics the radiator mounting modifications necessary to angle the bottom of the rad forward, such that rads taller than 14" can be used? How do you hold the taller rad in that position?
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Re: I need to replace my radiator

Post  Lemming on Mon Nov 07, 2011 4:56 pm

Call Griffin and have a good two-row radiator made to your specs, not really that expensive.

I have a 951 rad that I'll sell you for cheap, it did not keep my car from overheating on the race track.
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Re: I need to replace my radiator

Post  acorad on Mon Nov 07, 2011 5:34 pm

Lemming, what rad are you using now?
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Re: I need to replace my radiator

Post  Lemming on Mon Nov 07, 2011 6:02 pm

Griffin two row, works well. The one I have is too big for your application, I have it slanted forward in my race car.
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Re: I need to replace my radiator

Post  acorad on Tue Nov 08, 2011 2:32 pm

Thanks Lemming.

How about this...is there anyone here running a V8, A/C, and a 14" rad (of any make)?
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Re: I need to replace my radiator

Post  Big E on Wed Nov 09, 2011 7:27 am

This doesn't exactly answer your question, but I talked to Griffin about whether or not I could run a Scirocco radiator w/ the LS, and they advised against it for a car that would see street and track duty. I thought maybe if I went with the 1.25" tube size over the standard 1" it might be work, but they didn't think so. The one I was considering was part # 2-58185-H.

The only thing that still confuses me a little about that is that rad comes up under their "Race Performance Radiator" if you search for something 22x13 and 400-600hp, which would seem to imply it would be fine. But, I'm no expert, so I'll defer to them.

Take all of that w/ a grain of salt, since I have yet to even acquire my engine to start the conversion (although I hope that's only a week or so away).

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Re: I need to replace my radiator

Post  docwyte on Wed Nov 09, 2011 11:23 am

I'd go with a brand new OEM 951 radiator and make sure all the ducting to it is sealed up.

I need to replace my radiator as well and that's my plan. TonyG is using a stock radiator with no issues on his race car in very hot conditions...

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Re: I need to replace my radiator

Post  acorad on Wed Nov 09, 2011 1:10 pm

Doc, are you running AC?
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Re: I need to replace my radiator

Post  docwyte on Wed Nov 09, 2011 1:27 pm

Yep. My stock radiator was doing pretty well in the beginning of the year. Coolant temps steady at 190-200, oil temps at 160.

Then I think it got gummed up, as temps were much higher.

The radiator was struggling on track as well. So I'm going to try a brand new, fresh radiator and see what happens...

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Re: I need to replace my radiator

Post  acorad on Wed Nov 09, 2011 4:51 pm

doc, I assume there is no fitting for the LS steam pipe on the 951 rad? What do you do about that?
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Re: I need to replace my radiator

Post  docwyte on Wed Nov 09, 2011 5:33 pm

I believe I'm venting back into the stock coolant reservoir, but Eric (aka Admin) can answer that better...

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Re: I need to replace my radiator

Post  Arthropraxis on Wed Nov 09, 2011 7:15 pm

FWIW, I used a brass T to connect the steam line from the Porsche radiator and the LS1 steam pipe to the reservoir. It seems to work fine. The car isn't off the jacks yet, but the motor can run as long as I want to, the fans cycle on and off with the temp staying constant.
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Re: I need to replace my radiator

Post  acorad on Wed Nov 09, 2011 7:57 pm

Anthro and Doc, thanks, any chance you can snap some pics of your 951 rad so I can see how it's plumbed? I've never seen one.
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Re: I need to replace my radiator

Post  Arthropraxis on Wed Nov 09, 2011 8:52 pm

[You must be registered and logged in to see this link.] reservoir with the T and fill tube that goes to the passenger side inlet to radiator.
[You must be registered and logged in to see this link.]upper radiator hose to drivers side inlet and the smaller hose above is the LS1 steam pipe to the T
[You must be registered and logged in to see this link.]smaller upper hose is the line from the reservoir to the passenger side inlet, the larger hose behind it is from the thermostat to the lower radiator inlet.
[You must be registered and logged in to see this link.]drivers side, smaller upper hose is the Porsche steam port to the T, the lower larger hose goes to the upper inlet on the block (second picture)
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Re: I need to replace my radiator

Post  acorad on Thu Nov 10, 2011 11:43 am

Wow, thanks Anthro. Perfect!

Are those the OEM 951 cooling fans? Are they shrouded such that they pull air through the entire core, and not just where the fans themselves physically are?

I'm thinking that the non-shrouded RH fan is one of the reasons for my high temps with the AC on in stop and go traffic, as it leaves a lot of the rad with no air being pulled through it.
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Re: I need to replace my radiator

Post  Arthropraxis on Thu Nov 10, 2011 11:49 am

Yes, they are factory fans and they pull air through the entire surface of the radiator. The shroud seals to the radiator. I used hose spices for the upper and lower radiator hoses to connect the Porsche and LS1 hoses since they are different diameters. Jagsthatrun.com will make any size you need out of aluminum.
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Re: I need to replace my radiator

Post  acorad on Thu Nov 10, 2011 12:12 pm

Thanks Anthro.
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Re: I need to replace my radiator

Post  acorad on Thu Nov 10, 2011 3:59 pm

Lemming, PM sent.
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Re: I need to replace my radiator

Post  acorad on Fri Nov 11, 2011 2:40 pm

Dawg, PM sent.
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Re: I need to replace my radiator

Post  docwyte on Sat Nov 12, 2011 1:33 pm

Just picked up a brand new OEM turbo radiator from a friend this morning. Will hopefully get it in the car shortly.

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Re: I need to replace my radiator

Post  docwyte on Sun Nov 13, 2011 7:20 pm

Took advantage of a nice day and got the radiator in the car. The old one looked fine, but that doesn't really mean anything.

One things for sure, I have a ton of stuff in the way! The oil cooler lines were a bit of a PITA as they're not easy to move out of the way.

Got the radiator out though, cleaned up the AC condenser, drained the dirty water (WTF?) out of the windshield washer tank and squirmed the new radiator into place.

Super easy to burp it through the overflow tank, just fill it up, let it hit 190F, then turn on the heat. Fans came on as they should, both speeds. Also made more ducting below the car that extends further than my splitter. The 944 Spec racers say it makes a huge difference, so we'll see.

My sample size is fairly low now, just the drive home of about 15 miles, but the temps were definitely lower. Coolant temps were 180ish, but oil temps were 155, at least a 25 degree difference.

We'll see what happens this coming summer on the track.

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Re: I need to replace my radiator

Post  Arthropraxis on Sun Nov 13, 2011 8:06 pm

Good to hear. I put a new turbo radiator in over the summer.
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Re: I need to replace my radiator

Post  acorad on Tue Nov 15, 2011 2:41 pm

docwyte wrote: Also made more ducting below the car that extends further than my splitter.
Doc, love to see this, any pics of the ducting?

I'm leaning more and more toward the 951 rad as it doesn't hang as low and scrape/break like the oversized 16" Ron Davis/RH rad, and because the 951 fan shrouding gives it about 275 sq in of cooling at idle/low speeds, while the non-shrouded RD/RH fan only covers about about 200 sq in.

Idle/low speed with the AC on is where I was getting too hot.
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Re: I need to replace my radiator

Post  docwyte on Tue Nov 15, 2011 2:44 pm

Basically it's just a piece of flat aluminum sheeting that extends to the cross member from underneath the radiator. Then my splitter seals up the front end to the aluminum sheeting.

I do have the factory fans and shrouding in place, they're covering up the entire back of the radiator.

My friend has built many spec 944's and he said that aluminum sheeting made a dramatic difference in cooling on the race cars.

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Re: I need to replace my radiator

Post  acorad on Tue Nov 15, 2011 2:48 pm

Thanks Doc, got it!
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