Show full size 924Board.org
Discussion Forum of 924.org
 
 FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 
 Technical FAQ924 FAQ (Technical)   Technical924 Technical Section   Jump to 924.org924.org   Jump to PCA 924 Registry924 Registry

intercooler Q
Goto page 1, 2, 3  Next
 
Post new topic   Reply to topic    924Board.org Forum Index -> 931 Tech.
View previous topic :: View next topic  
Author Message
SandmanUtah  
Guest





PostPosted: Fri May 24, 2002 3:11 am    Post subject: Reply with quote

ok, so it looks like I'll be keeping my little beast, so first up is to rebuild the turbo and put the engine back in. Now I read in the FAQ that installing the intercooler requires removal of your pop up lights. Anyone else had any alternative mountings that don't require losing lights or replacing the hood? To refresh, this is an early 80, which I'm supposing makes it a series one, although the plate numbers don't match the ones in the FAQ, but rather show the turbo as a 5326 970 7007. Now this has been replaced by the dealer twice in the past, so maybe that's why. So let's see, for more power, we go to a spring and boost controller, intercooler and what, maybe an external oil delay pump to keep this thing juiced? I do NOT want to be yanking this thing again in 3000 miles. Belts and hoses will be done while I've got it out. Anything else? Thanks for the input guys.

Sean Sullivan
(yeah, that's irish, let's not start that up again!)
Back to top
Rick MacLaren  
Guest





PostPosted: Fri May 24, 2002 3:52 am    Post subject: Reply with quote

Yup. John Heaney made a top mounted intercooler. I'm experimenting with mounting that intercooler on my car presently. A few ticks to work out, probably primarily due to me, but some because it's an older model and his original design got modified somewhat. You always have to play with these things to get them right. I'll let you know how it goes. Scoop too.
Back to top
Pat  
Guest





PostPosted: Fri May 24, 2002 11:06 am    Post subject: Reply with quote

There was an intercooler on e-bay not to long ago that mounted the intercooler behind the passenger side light (right from drivers seat), it required moving the oil cooler forward but didn't require removing the pop up lights. I think the seller said it was made by William Balberro Racing (Not sure if I spelled it right).
Back to top
Peter_in_AU  



Joined: 29 Jul 2001
Posts: 2740
Location: Sydney, Australia

PostPosted: Sat May 25, 2002 1:09 am    Post subject: Reply with quote

you've got lots of options depending on how much work you want to do.

Get on your back under the nose and have a look at the space you have available in front of the radiator. There are a lot of intercoolers that will fit in there - measure up and head for the junk yard. A good choice is the 'cooler from the series V or IV mazda rx7 (they stole the 924 body shape so stealing their intercooler is poetic) Volvo do some nice small deep ones. With a few bits of cardboard and some tape you'll be able to work out what size works. Might be an idea to also think about a more efficient radiator as you'll be reducing the air-flow.

If you ditch the aircon radiator you could get a really monster 'cooler in there.

If money is no object there are heaps of places that will assemble a custom 'cooler for you.

You have to figure that any intercooler is better than none so rather than stuff up the looks of the car find something that fits
Back to top
View user's profile Send private message Send e-mail
Michael Kouridakis  
Guest





PostPosted: Sat May 25, 2002 2:40 pm    Post subject: Reply with quote

It seems to me that placement of the IC is easier to arrange than the plumbing. I bought a 911 IC at Hershey a few years ago and have finally begun to work out how to get it in the car. I've started by removing the AC compressor (NO FREON left in the system), the air filter housing and the alternator. I'm relocating the radiator supply tank. The alternator will be relocated lower down out of the way of the IC and the AC radiator will be removed. The 3.3 911 IC just fits.

The challenge is how to plumb the thing. I may have to remove the headlight hardware on the right to get the tubing around the fuel distributor and down to the turbo. I'll have to have the inlet/outlet ports on the IC moved to make this work.

Any thoughts?
Back to top
SandmanUtah  
Guest





PostPosted: Sun May 26, 2002 1:30 am    Post subject: Reply with quote

thanks for the input guys, but let me ask you this. Let's say, for arguments sake, that I want to keep all the little luxuries, like say the AC here in the desert..lol...it sounds like finding a hole or two and looking for areas to snake the plumbing then looking for any style intercooler that will fit seems the right plan. But here's the Q, without becoming just a flat out, ill tempered race car, what mods are producing the best yields for not only increasing the horsepower, but keeping it all running cool? Wayyyyy back, I lost a water pump between here and las vegas and ended up warping a head. This time through, I want the power, but I want to stay as cool as possible when it goes into the 100's around here, but still keep the AC cranked in my little solar oven. What do you think?
Back to top
Lizard  
Guest





PostPosted: Sun May 26, 2002 2:56 am    Post subject: Reply with quote

get a small IC and mount it right beside the throttle body and put a hood scoop to direct air too it, use the carrera gt scoop, works and looks great
Back to top
dwak  
Guest





PostPosted: Sun May 26, 2002 1:19 pm    Post subject: Reply with quote

Sandman, in your neck of the woods, I'd blacken my windows, put five airscoops on, and hang those canvas drip bags over the front intakes. Or drive a Caddie.
dwak
Back to top
Rick MacLaren  
Guest





PostPosted: Tue May 28, 2002 12:10 am    Post subject: Reply with quote

Have a look at the Carrera GT. That's what the top mounted scoop looks like ... no holes in the chassis...if that matters to you at sale time...
Back to top
SandmanUtah  
Guest





PostPosted: Thu May 30, 2002 2:08 am    Post subject: Reply with quote

ok, so I saw John's slick little IC set up. But what about that hood scoop? Is it a cut out and fiberglass kind of thing? Or is there a totally new hood involved with that? If John would like to answer, I'd also like to ask about the flair fenders he put on. Are those fiberglass as well and if so, where did you get them/ would you recommend them as a good quality/fitting 'glass manufacturer? Thanks
Back to top
SandmanUtah  
Guest





PostPosted: Thu May 30, 2002 2:11 am    Post subject: Reply with quote

Oh, and DWAK, got it, but driving that as far as feeling connected to the road, you might as well be sleeping in the back seat!
Back to top
Rick MacLaren  
Guest





PostPosted: Thu May 30, 2002 3:45 am    Post subject: Reply with quote

You asked:

Is it a cut out and fiberglass kind of thing?

Answer: Yes. It comes sanded and ready to paint.

Or is there a totally new hood involved with that?

Answer: Nope. But it does look better on a 924 NA hood than a 931 hood with the NACA duct. Oh well.

Question you should have asked: Does it work?

Answer: Yes. Cools down the intake charge.

Question you should have asked: Bang for the buck?

Probably get + 20 HP or more depending on where you place your boost. Cost per horsepower is likely in the range of $50 per 1 horsepower. That's not to shabby, and that is with a MILD installation (i.e., not too much boost...9 PSI).

Back to top
John H  
Guest





PostPosted: Thu May 30, 2002 12:40 pm    Post subject: Reply with quote

Quote:

On 2002-05-30 01:08, SandmanUtah wrote:
ok, so I saw John's slick little IC set up. But what about that hood scoop? Is it a cut out and fiberglass kind of thing? Or is there a totally new hood involved with that? If John would like to answer, I'd also like to ask about the flair fenders he put on. Are those fiberglass as well and if so, where did you get them/ would you recommend them as a good quality/fitting 'glass manufacturer? Thanks


The hood scoop is a fibreglass copy of a real GT scoop. It just bolts onto the hood after you've cut hole for it. I still run a 931 hood as my clutch master cylinder is directly above the exhaust and the NACA duct directs cold ai onto it. Note I have the steering wheel on the Right side of the car.

The flares I have a fibreglass copie sagain off a real GT. I got them in New Zealand (where I live) many years ago. As for ones from US - probably any reputable firm GT- racing, AIR etc should be able to do them. Whoever you get them off you should still allow for some mucking around to get them to look nice.
Back to top
SandmanUtah  
Guest





PostPosted: Fri May 31, 2002 1:30 am    Post subject: Reply with quote

ok, good. Thanks Rick & John. Rick, as far as the hp gains go at 9lbs boost, is that with the standard compression in the U.S. series one, or to the ROW specs/series II? Heat and all being what it is. I agree with you John about fiberglass needing "massaging" some just needs more than others..lol...actually, I wanted to go back to the boost comment and the comments elsewhere along here with some of the adjustable boosts/spring changes that have jumped some of these cars over 15psi boost. Anyone doing this that has very bad things happen to their car?? All I've seen are those who said they've run tens of thousands of miles with no problems...anyone bending rods, blowing a hole in their block, warping heads. catching their car on fire kind of thing?!! Thanks guys.

Sean
Back to top
Rick MacLaren  
Guest





PostPosted: Fri May 31, 2002 2:51 am    Post subject: Reply with quote

My car is kind of a special case. I ordered 8.5:1 compression pistons, new. Got 8:1 compression Euro pistons. Oh well. Bored out 0.020 over. Lightened the rods, balanced the engine rods, crank...all that crap. The car is rated for 7.5:1 compression pistons. Has the larger turbo, and is now intercooled, lightened flywheel, honed intake, no cat, better coil, stock EMS (presently, looking into SDS). So it's not a normal animal.

Yeah, well, blowing up your car, that I can speak about. I had the boost up to 18 PSI at one point with no intercooler, just used water injection and it worked quite nicely. No ping. No knock. However, it's not reccommended, largely because of superstition and lack of understanding, and a small audience who'll listen to you. But the draggers do it and it works. Also the USAF used it and it worked there too.

I blew the engine with 15 PSI and NO water injection. It wasn't even ON. And I wasn't hammering it too badly. I would not run that car above stock again without TOLULENE or an intercooler or a good water injection system. Personal opinion only. Some guys run them with no cooling, but I think they're courting disaster. Again, my opinion only. Do what thou wilst.

I'd use TOLULENE and put a few gallons of that in your tank. Try a manual boost controller and experiment and see how it feels with just 9 or 10 PSI at first. That's how it'll feel with an intercooler and the same boost.

Someone jump in and correct me if I'm off base here.


[ This Message was edited by: Rick MacLaren on 2002-05-31 01:59 ]
Back to top
Display posts from previous:   
Post new topic   Reply to topic    924Board.org Forum Index -> 931 Tech. All times are GMT + 11 Hours
Goto page 1, 2, 3  Next
Page 1 of 3

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum


Powered by phpBB © 2001, 2005 phpBB Group