My LS1 Conversion 911 - Page 5

JMH82SC · 03-15-2009, 05:10 PM

Quote:

Originally Posted by sc_rufctr

Just and idea on the radiator.

Why not build a bracket and mount it to the engine... Inter cooler style. It would be ion the same position it is now but doesn't lift with the lid.

This may sounds stupid but you could open and close the lid with no issues to check oil etc. And lift the radiator when need to get to the coils and such. You could still use your flexible hoses that you already have. How often would you need to lift the radiator?... If you were careful in its design you could set it up so that you could change spark plugs without removing it.

It would look like some sort of inter cooler... (Mind you a very large one)

X2 This is the first thing that came to mind when I looked at your set up.

Porsche_monkey · 03-15-2009, 05:48 PM

Me too, but it is very large compared to an intercooler I think. And it barely fits into the tail opening, so it might be really tight as the lid closes.

BoxsterGT · 03-18-2009, 03:57 AM

Will there be enough air flow is the question.
The intercoolers rely on the air cooled fan drawing air thru, especially at low speeds. With this setup there is much less air flow.
I like the fitment but wonder if it will get the cooling it needs.
Len

lin7310948 · 03-18-2009, 06:35 AM

not only the flow through the radiator, but all the heat going onto the top of the engine and in particulat the intake system. i have a v8 car and you can trick yourself trying to be trick! i know...from experience. but, hopefully it will work for you..

Netspeed · 03-18-2009, 06:40 AM

I'm curious to see how well the radiator will cool laying flat like that. When upright, it has all that space to flow down to cool....now it just has a few inches. To me, it would be like the difference of a waterfall and a running stream. Just a thought but a very cool build nonetheless.

aftermath · aftermath's Garage

Inspiration for me to finish my projects. I have to pull my LS1 from the 944 due to a bottom end knock so I'm all for engine swaps ( 3 in total ). I would do it a bit different on my 930 if I were to start over, I would do a electric pump on relays to keep it running when I turn the engine off. Im interested in your raditator location. I like it but Im thinking too much heat coming off the engine will reduce the cooling effect. I also find on my one race car, I can turn off the electric fan when at speed because there is more air flow through the rad than what the fan would do on its own. With the location of your rad, I cant see enough natural air flow at speed over the rad to cool the engine. Excellent work, keep us posted.

Wintermute · 03-18-2009, 11:20 AM

Starting to see more of the LS1 stuff around, pretty neat. It's fun watching someone wrestle an LS1 944 around an autocross track. Great sound too. Subscribed.

OBI · 03-18-2009, 12:34 PM

Quote:

Originally Posted by Wintermute

Starting to see more of the LS1 stuff around, pretty neat. It's fun watching someone wrestle an LS1 944 around an autocross track. Great sound too. Subscribed.

http://ls1tech.com/forums/

This is a great site based on all those motors. Lots of good info there.

cajun · cajun's Garage

Quote:

Originally Posted by aftermath

Inspiration for me to finish my projects. I have to pull my LS1 from the 944 due to a bottom end knock so I'm all for engine swaps ( 3 in total ). I would do it a bit different on my 930 if I were to start over, I would do a electric pump on relays to keep it running when I turn the engine off. Im interested in your raditator location. I like it but Im thinking too much heat coming off the engine will reduce the cooling effect. I also find on my one race car, I can turn off the electric fan when at speed because there is more air flow through the rad than what the fan would do on its own. With the location of your rad, I cant see enough natural air flow at speed over the rad to cool the engine. Excellent work, keep us posted.

You have a PM!!!

tobluforu · tobluforu's Garage

With all the talk of the radiator, the engineering that is involved and the what-ifs, it seems like it might be a pretty good idea to just bite the bullet and mount it up front? Or like stated above, mount it to the top of engine, but that would be a hassle when it comes to work on it I guess. You can get so many different sizes of radiators/heat exchangers that you could pretty much install them almost any where. Maybe get two smaller units and put them up front, or in wheel wells, etc??? If you do go this route, you can then mount those fans or others to the deck lid and either push air through the engine and down or up and out as every little bit will help in the heat of Florida?

ohecht · 03-21-2009, 07:00 AM

Just as a completely different option with more weight closer to the ground too, did you consider using the wheel wells as places for radiators? With a 993 body and no need for an oil tank you'd have room in both rear wells, and griffiths (http://www.griffiths.com/porsche/ac/911ac/index.html#Condensers) makes AC condensor kits with fans that use both the front and back of the left rear wheel well.

Adapting a similar design to your set up would allow you to have 4 small radiators if necessary. There would be a lot more connections to worry about, and the crossover from left to right would be a challenge if you needed more than 2 radiators, but it could be another option to consider. Another advantage might be leaving the top of the engine free to flow air through the deck lid to get more ambient cooling at the same time.

Jesset100 · Jesset100's Garage

Excuse my ms paint "art", why not mount the radiator to the engine like a intercooler just like Porsche did with a little tweak. Mount it so you can move it as in the diagram to fill the radiator and work on the engine.

daepp · 03-21-2009, 08:41 AM

What does the LS1 weigh with respect to the flat 6?

Did you consider one of the new direct injection aluminum V6's - same HP, less weight and less space???

RarlyL8 · RarlyL8's Garage

A fully dressed 930 weighs 520 pounds dry.

This may have been said before; why put all that extra (water) weight over the already heavy rear end? Any leak will also mess up that nice engine.
Just an observation.

Your car is going to be a riot to drive with V8 torque!

OBI · 03-21-2009, 10:48 AM

Quote:

Originally Posted by daepp

What does the LS1 weigh with respect to the flat 6?

Did you consider one of the new direct injection aluminum V6's - same HP, less weight and less space???

It weighs less.

OBI · 03-21-2009, 10:52 AM

A quote from Renegade Hybrids "Reduced weight of the LS-1 is also a HUGE advantage over the "big" 911 motors. Weighing less than a completely dressed 3.0L NA motor, the LS-1 has turbo performance with much less than turbo six weight. With less weight in the rear and more power under your right foot, you can see why a converted 911 is so much fun to drive."

Zeke · 03-21-2009, 11:31 AM

I'd put multiple radiators in series or maybe parallel with t-stats governing the flow. One big NASCAR radiator may not be the answer.

shanghai_todd · 03-21-2009, 06:39 PM

OK here is the update. I am heading back to Florida at the end of next week and will have some time to continue on my project. The plan is to first prove out the radiator cooling capabilities, short term I will use the current hoses and setup but will monitor the opening and closing. If everything checks out and the "What-ifs" are not a problem I will change out to -20AN braided flex hoses. I will have 2 temp gauges to monitor this.

So what to come in the next couple of weeks:
- Wiring Harness
- Gauge wiring and install
- Intake piping
- Oil Cooler
- A/C

More to come soon..

Kevin Stewart · 03-21-2009, 08:43 PM

you need to have the radiator reworked to a dual pass or buy a dual pass, Kevin

shanghai_todd · 03-30-2009, 08:48 AM

Well I am now back home and will continue with the build

Waiting at my door was a delivery from Fedex which was my Nascar -20AN lines that I decided to purchase from Ebay to give a try for the X-over idea for the radiator hoses. At first glance they are very nice and have the cool Wiggins fitting on each end. The Add I bought them from said that they were from Nascar and used for Oil. They flex very well and will have no problem clearing the radiator and routing around the engine compartment, the only question is can they handle the heat?

Does anyone have experience or seen this try of hose before? I am not sure of the manufacture so I can not be for sure the temp rating. It appears to be made from some sort of Teflon or strong Urethane. One this is for sure is it is strong.. I can not crush it at all by hand.

Before trying out I am looking for some feedback, was also thinking of boiling some hot water and placing the hose in the water to see if it has an effect.

Looking fr some feedback on this