My LS1 Conversion 911 - Page 4

gtc · gtc's Garage

Quote:

Originally Posted by Bob Goding

Nice!---just a thought,---you might consider crossing the radiator hoses over,L-to R at the rad. You may have to use angle fittings ,out of the radiator but the extra hose length and the ,"across the bay",flow
may be less stressful on the hose bending? altho the hose might not like that much axial
movement but the swivel fittings would take care of that---Make sense?
Apologies for the Art work!

Exactly what I was thinking.

Have a bung welded into the side of the radiator like this, and you'll be able to bleed any trapped air easily. I'm wondering what you will do about an expansion tank, though.

VinceQN · 03-10-2009, 03:15 PM

No flames from me, to each man his own, I commend your challenge and work

shanghai_todd · 03-10-2009, 03:53 PM

Wow never thought of this and like the idea, when I return to the US I will have to take some measurements and moch up some hoses to see howstrain and flex is involved.

No apologies needed for the artwork, better than anything I can draw

BTW, what are you thoughts on -16AN lines? I think flexibility would be great but a little usure on the amount of flow.

Anyone with a front mount want to share what size lines are running from front to back? I would also think it is safe to assume that the distance from front to back would have more resistance due to the length of travel. When compared to my setup there will only be 24~44" before reaching the radiator so maybe -16AN could work

Quote:

Originally Posted by Bob Goding

Nice!---just a thought,---you might consider crossing the radiator hoses over,L-to R at the rad. You may have to use angle fittings ,out of the radiator but the extra hose length and the ,"across the bay",flow
may be less stressful on the hose bending? altho the hose might not like that much axial
movement but the swivel fittings would take care of that---Make sense?
Apologies for the Art work!

Zeke · 03-10-2009, 03:56 PM

shorter is better, but at 24 to 44, you're pushing what a Corvette has, right? I'd size them the same as the vette.

shanghai_todd · 03-10-2009, 04:08 PM

Here are some more pictures of the rear radiator to help with the ideas.

I love the feedback I have been getting, keep it coming guys

shanghai_todd · 03-10-2009, 04:13 PM

Quote:

Originally Posted by milt

shorter is better, but at 24 to 44, you're pushing what a Corvette has, right? I'd size them the same as the vette.

Good Point, I would have to compare what an LS1 vette and Camaro have. Although my water pump is a 55 gph meziere electric pump this may be more flow than a stock water pump. My radiator is also smaller but with a thicker core and aluminum so all these will need to be factored in.

Zeke · 03-10-2009, 04:14 PM

Yeah, with the lid down, that one hose will be pretty well kinked. The cross over idea is really good.

DW SD · 03-10-2009, 04:19 PM

-20 is not incredibly stiff. I wouldn't think it is stiffer than what you show now and it doesn't have to be that flexible in the config shown in the above sketch.
Use heat shrink tubing where it will rub on the engine.

How can you get a cold air supply to feed the intake air (or did I miss this resolution)?

Are the fans push or pull? Seems like either has their drawbacks.

Doug

Bob Goding · 03-10-2009, 04:46 PM

Just measured -16 fitting and hose diameters---actually the "16" is a bit of a misnomer. I think it comes from the outside diameter of aluminum tubing in AN sizes ,in sixteenths of an inch---but the flex hose and fittings are not that size.
I have Aeroquip 601 hose and the bore size is about 20/21 mm. the fittings bore size is 19mm or 3/4 inch.[ very close to Porsche factory oil line size.]
Seems a bit small to me ,for a V8 radiator size.

shanghai_todd · 03-10-2009, 04:50 PM

Doug, I plan on putting a 3.5" 90 degree at the intake and route it into the fender so that I am not drawing the hot air in the engine compartment. Regarding air direction I think pulling in the cool air from the outside and pushing it down over the engine will be the most effective. It will be trial-n-error by monitoring the temps and reversing the wiring. They will trigger thru the wiring harness

t951 · t951's Garage

Ok, this is awesome!
More updates please.
I don't know why you keep going to Shanghai, but quit it!! Focus on this!!

BoxsterGT · 03-13-2009, 08:39 AM

I am looking at Thermoid BellowsFlex "A" coolant hose. It has a nylon screen reinforcing with a helical wire, allowing great flex without collapse.

Haven't tried it yet but considering it. $13.20 per ft from www.go2marine.com.

Len

FinallyGotOne · FinallyGotOne's Garage

hmm. well this is pretty amazing! but I would ask, won't this extra torque create more body flexing of the 911, and on a cabriolet wont that become a problem soon down thw line? will you have to stiffen the body or frame at all? I am really surprised thatthe LS1 engine is actually lighter than my 3.0?
Other than that, this is just really cool stuff to follow. I totally commend you all who do these cool major projects to the 911's. I wonder how much quicker the 0-60 time is? annd what is the actual total weight of the 911 compared to a Corvette LS1?

Porsche_monkey · 03-13-2009, 12:04 PM

What about the line they use on a gas pump? And the swivel fittings. Just wondering....

shbop · 03-13-2009, 03:29 PM

Todd,

What are you going to do for ECU and harness? Have you got a factory GM set-up, or are you going in another direction? Just curious. Put one of these in a 71' El Camino. Getting the Ecu straight was a headache, but was sure worth the trouble. Can't imagine how that block will push your car.

andytat · 03-13-2009, 05:38 PM

subscribed

Roc Doc · 03-13-2009, 06:33 PM

Quote:

Originally Posted by FinallyGotOne

hmm. well this is pretty amazing! but I would ask, won't this extra torque create more body flexing of the 911, and on a cabriolet wont that become a problem soon down thw line? will you have to stiffen the body or frame at all? I am really surprised thatthe LS1 engine is actually lighter than my 3.0?
Other than that, this is just really cool stuff to follow. I totally commend you all who do these cool major projects to the 911's. I wonder how much quicker the 0-60 time is? annd what is the actual total weight of the 911 compared to a Corvette LS1?

With the LS1 you loose the dry sump system, and if you go with a front radiator, then your weight balance is better than a stock 911. The LS1 is all aluminum, and doesn't have the cooling fan, shroud, fins and individual barrels of a 901 engine, all of which add weight.

I believe a 0-60 time in the low 4's is not out of reason.

I personally have my doubts about a 915 transmission holding up, but Scott says they do.

turbobrat930 · 03-15-2009, 01:10 PM

VERY interesting project... MAJOR kudoes for doing it yourself.... and not paying someone to complete it for you!!! Looking good

ddiamonds · 03-15-2009, 01:32 PM

What would it cost to have someone else do it for you?

Todd...Are you a mechanic by any chance? I am working on a similar project SBC350 into 911S but I am a DYI guy. I am just amazed at how far you have gone in such a short time.

sc_rufctr · 09:05 AM

Just and idea on the radiator.

Why not build a bracket and mount it to the engine... Inter cooler style. It would be in 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)