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> Wanna see some heads????, Mighty Spyder project heads revealed!
messix
post Mar 14 2006, 01:52 AM
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jake how'd they do on the flow bench? what size valves?
they look monstrous. huge direct ports.
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alpha434
post Mar 14 2006, 02:00 AM
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Hey Jake.

Flippin awesome!

What more can I say?






Did you gas port the pistons? (IMG:http://www.914world.com/bbs2/html/emoticons/biggrin.gif)
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alpha434
post Mar 14 2006, 03:15 AM
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How well does the thermal dispersant work? Do you have any hard data for it, in comparison to aluminum?
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Joe Ricard
post Mar 14 2006, 05:58 AM
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Nice,

Yup thats all I can say cause I'm pretty much speachless.
and that don't happen often.
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bd1308
post Mar 14 2006, 06:43 AM
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Which costs more, a 917 engine or this?

b
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Jake Raby
post Mar 14 2006, 08:21 AM
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QUOTE (alpha434 @ Mar 14 2006, 01:15 AM)
How well does the thermal dispersant work? Do you have any hard data for it, in comparison to aluminum?

Yes I have hard data. Yes it works.

All coatings are not created equally, the first 3 coatings we tried INCREASED head temps.

I'm sure a 917 engine costs more than this, even a rebuild of a 4 cam does....

But the customer got a very good deal on the engine- Len and I have as much invested into it as he does! Cars and customers like this don't come along everyday and we decided to flaunt some ideas on thsis project because it was perfect to showcase our work to a group of serious people that appreciate it.

The customer came to me wantinga run of the mill 2270/2316... He came over from the UK and brought pics of the car and the outline... Right away I knew he was the perfect guy for this combo!
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Mueller
post Mar 14 2006, 09:48 AM
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wow...those ports are huge...I'm wondering if a variable length/area intake plenum would make a nice addition to this motor for more torque at the lower RPMs....of course in the car it's going into, I doubt it needs much help (IMG:http://www.914world.com/bbs2/html/emoticons/MDB2.gif)
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dstar
post Mar 14 2006, 10:06 AM
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QUOTE (messix @ Mar 13 2006, 11:52 PM)
jake how'd they do on the flow bench? what size valves?
they look monstrous. huge direct ports.

(IMG:http://www.cycloneinjapan.com/upload/files/25/heads.JPG)

Perfect turbo head!

Don
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Jake Raby
post Mar 14 2006, 10:10 AM
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Actually the Turbo version would be a 85+% head. This head is perfectly balanced at 80% average...

Drivability isn't a concern! The cam being used is a derivative of what Racer Chris is running in his 186HP 1800CC F prod engine! The intake valve is open .350 at BDC!

It'll START to pull at 5,000 RPM...
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Slowpoke
post Mar 14 2006, 10:16 AM
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Hey Jake..... how come you spray painted all them heads??? (IMG:http://www.914world.com/bbs2/html/emoticons/biggrin.gif)

Seriously, does that coating holds up the the valve seats and valve faces?? Must be tough stuff. Heads look real nice!
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Jake Raby
post Mar 14 2006, 11:12 AM
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It held up fine on a class 10 SCORE engine that I built last year... It did a full season including the Baja 1000 and it was still intact enough to be washed up and resused!
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Mueller
post Mar 14 2006, 11:21 AM
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QUOTE (Jake Raby @ Mar 14 2006, 10:12 AM)
It held up fine on a class 10 SCORE engine that I built last year... It did a full season including the Baja 1000 and it was still intact enough to be washed up and resused!

it is pretty damn amazing that a coating can take the abuse of a combustion chamber with the heat and cooling effect of the incomming air...and then throw in the heat cycles of the parent material expanding and such....I might have to scrap my watercooled head plans (IMG:http://www.914world.com/bbs2/html/emoticons/wacko.gif)
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alpha434
post Mar 14 2006, 12:07 PM
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Yeah. Do you have problems with chipping or flaking of the coatings?

And I'm going to start PMing you a barrage of questions.
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Jake Raby
post Mar 14 2006, 12:57 PM
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The coatings are just like painting a car, its all ijn surface preparation and application to get positive results.. We finally found the guys that would do this for us but not at a "cheap" rate...

Here are the pics of my pistons in the 3 Liter test engine we used for Billet head testing..

(IMG:http://www.aircooledtechnology.com/r_d_3_OH/buildup/DSCN2433.JPG)

(IMG:http://www.aircooledtechnology.com/r_d_engine/small_size/100_2470.JPG)

Here they are after 14,000 miles of 235HP hell raising. The coating was only scuffed just under the ring oil ring lands
. This engine ONLY had .001 of piston/skirt clearance and still attained this!(IMG:http://www.aircooledtechnology.com/r_d_3_OH/teardown/First%20group%20of%20pics%20021.jpg)

As for all the PMs... No need in writing them unless you plan on purchasing an engine with them employed, I don't do this for my health. (IMG:http://www.914world.com/bbs2/html/emoticons/cool_shades.gif) The R&D to perfect this cost us thousands of bucks and no one gave us any assistance!
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crash914
post Mar 14 2006, 01:40 PM
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Jake,

You will like Lemans....nice train ride from Paris. I was there a year ago..did not get to the track though (IMG:http://www.914world.com/bbs2/html/emoticons/mad.gif)

Lots of nice food over there...it might be more fun to rent a car to play around on the roads...

have fun!! Take lots of video!!
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Jake Raby
post Mar 14 2006, 03:05 PM
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The owner of the Mighty Spyder is going to let Beth and I borrow his Citroen to drive all over the UK from his place in London. I want to spend a solid 2 weeks there and about before cruising with the Porsche Club of G.B to the event in the Spyder. Beth and I already plan on hanging out at www.rabycastle.com for a day or two as well.

The owner of the car posted this earlier on the Spyderclub site
"Jake doesn't know it yet, but when he gets to France in July for the Classic Le Mans series, I've booked him a once-only drive on the circuit (just one lap) so that he may test the little beauty for himself. There will be others on the track too, so not at racing speeds, just a gentle poodle.... "

To say the least I'm excited! Just having a pic driving this car, with this engine at Leman will be priceless!
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grantsfo
post Mar 14 2006, 07:30 PM
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QUOTE (Jake Raby @ Mar 14 2006, 01:05 PM)
The owner of the Mighty Spyder is going to let Beth and I borrow his Citroen to drive all over the UK from his place in London. I want to spend a solid 2 weeks there and about before cruising with the Porsche Club of G.B to the event in the Spyder. Beth and I already plan on hanging out at www.rabycastle.com for a day or two as well.

The owner of the car posted this earlier on the Spyderclub site
"Jake doesn't know it yet, but when he gets to France in July for the Classic Le Mans series, I've booked him a once-only drive on the circuit (just one lap) so that he may test the little beauty for himself. There will be others on the track too, so not at racing speeds, just a gentle poodle.... "

To say the least I'm excited! Just having a pic driving this car, with this engine at Leman will be priceless!

Wow! Very nice! Take pictures. (IMG:http://www.914world.com/bbs2/html/emoticons/aktion035.gif)
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Randal
post Mar 14 2006, 11:18 PM
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Those are nice heads Jake, but I wouldn't trade them for mine, especially since they will be bolted on the rest of your kit shortly.

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Jake Raby
post Mar 15 2006, 08:08 AM
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QUOTE (Randal @ Mar 14 2006, 09:18 PM)
Those are nice heads Jake, but I wouldn't trade them for mine, especially since they will be bolted on the rest of your kit shortly.

Randal, Your engine would make less power with these heads, than the ones Len prepared for you!

Simply because of the "combo"
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root
post Mar 15 2006, 11:42 AM
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QUOTE
and here is the "Money shot"..... This is our newest exhaust port shape, and we already have special stub pipes made for it exclusively.. This is primarily to be used with Turbocharging. This changes all the rules. Len rocks!

Jake...looks like you got a bit of chatter in the face of that exhaust port??

Hope you intend to finish cut it! (IMG:http://www.914world.com/bbs2/html/emoticons/biggrin.gif)
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