 My 2.4 Six Engine, Manufacturing prototype intake adapters. |
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| McMark |
  Jul 15 2013, 07:30 PM
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#1
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914 Freak!  Group: Retired Admin Posts: 20,179 Joined: 13-March 03 From: Grand Rapids, MI Member No.: 419 Region Association: None  |
I picked up this 2.4 six awhile back and I'm gonna use this thread as I develop the engine which will eventually go in my gold car.
I'm starting a little out of order, but too bad. (IMG:style_emoticons/default/tongue.gif) So I have this aluminum flywheel. No manufacturer stamps or numbers on it whatsoever. I'm thinking that it might be too light for a street car, so I may not use it. It's about 3lbs by itself. I've got a 914 clutch adapter (basically a cut down 914/4 flywheel that bolts to the outer edge) and that brings the total flywheel weight to about 10lbs. I want a streetable car, is this thing too light? Attached image(s)   
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Replies
| Mike Bellis |
Jul 19 2013, 06:23 PM
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#2
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Resident Electrician Group: Members Posts: 8,346 Joined: 22-June 09 From: Midlothian TX Member No.: 10,496 Region Association: None 
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Longer runners will give you better low end torque. Shorter will move the torque curve higher typically.
What is your goal? Make sliding adjustable runners with O rings. Then tie a linear actuator to them. Control the actuator with an rpm counter to raise and lower as you drive... EASY! (IMG:style_emoticons/default/blink.gif) Mazda did this on racing engines. a NA 4 rotor did over 750hp. The RX-8 has multiple runners that are rpm/load controlled valves to lengthen and shorten the runners. |
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Posts in this topic
McMark My 2.4 Six Engine Jul 15 2013, 07:30 PM
ConeDodger Try it... Jul 15 2013, 07:37 PM BKLA :agree:
I have a lightened Patrick Motorsports f... Jul 15 2013, 07:47 PM sixnotfour your right at a stock 2.0 6 cylinder flywheel weig... Jul 15 2013, 08:04 PM brant old and new flywheels
of course we don't have... Jul 15 2013, 10:46 PM sixnotfour oh Brant that aluminum one is real vintage alright... Jul 15 2013, 10:48 PM brant its Frank Becks toss off.....
he went to a 4.5 di... Jul 15 2013, 10:49 PM pcar916 I've had a 6.75lb Patrick Motorsports aluminum... Jul 16 2013, 03:48 PM biosurfer1 Too light? I think you just killed a little part o... Jul 16 2013, 04:08 PM get off my lawn how light is your flywheel?
I'd say it's ... Jul 18 2013, 10:39 AM ChrisNPDrider My daily driver 914 turned cafe racer AX weekend w... Jul 19 2013, 10:20 AM GeorgeRud Figure that the heavy outer starter ring is at the... Jul 19 2013, 10:29 AM McMark Cool. Sounds like this flywheel will be fine. I ... Jul 19 2013, 11:26 AM JmuRiz With a 2.4 I'd go with longer to get a smidge ... Jul 19 2013, 12:04 PM BKLA :agree:
Love the polaris TB's! Great Ide... Jul 19 2013, 02:32 PM scotty b What cams are you using ? :confused: Jul 19 2013, 03:22 PM Dave_Darling Remember that the factory went to high-butterfly t... Jul 19 2013, 03:37 PM McMark Street engine. I like torque. Jul 19 2013, 06:41 PM r_towle 2 flanges cut.
Two pieces of tubing, cut stretched... Jul 19 2013, 08:37 PM JmuRiz Carbs for up to 3.0 are typically 40, but this siz... Jul 19 2013, 09:15 PM McMark Okay, time for another thought/question. The engi... Jul 26 2013, 08:08 PM
Mark Henry
Okay, time for another thought/question. The eng... Jul 26 2013, 09:51 PM kg6dxn Open it! You know you want to. DO IT!... Jul 26 2013, 09:40 PM rick 918-S Do a leak down first and make sure you "need ... Jul 26 2013, 10:02 PM McMark It's more about knowing what heads, cams, pist... Jul 27 2013, 02:58 AM Gary Hey Mark - is this the motor I dropped off? If so,... Jul 27 2013, 04:00 AM Eric_Shea What does this mean?
a. Port size 36X35 38mm int... Jul 27 2013, 10:14 AM sixnotfour that configuration only has about 8-1 compression.... Jul 27 2013, 10:33 AM Dr Evil :popcorn: Jul 27 2013, 11:22 AM Trekkor Bolt on a set of carbs and run it on the test stan... Jul 27 2013, 10:16 PM McMark The $2500 carbs I don't have? :blink: L... Aug 5 2013, 11:30 PM Trekkor
The $2500 carbs I don't have? :blink: ... Aug 9 2013, 03:25 PM McMark Finished the intake drawing (I think). Now I need... Aug 9 2013, 01:15 AM jimkelly will those Polaris fuel injectors provide enough f... Aug 9 2013, 06:48 AM McMark The injectors are pretty standard. So I was alrea... Aug 9 2013, 10:39 AM polo classic Do you know what distance is from the throttle bod... Aug 9 2013, 12:33 PM McMark Not sure. I drew up 'shorties' because on... Aug 9 2013, 01:59 PM McMark Ahhh, thats makes more sense. ;) I expect it runs.... Aug 9 2013, 04:29 PM McMark Prototype printing underway (not by me). :boing: Aug 9 2013, 07:28 PM McMark All done an ready to ship to me. :boing: Aug 9 2013, 11:09 PM euro911 Cool.
What is the material, Mark? Aug 10 2013, 01:09 AM jimkelly why the groove seen from top? is it a two piece p... Aug 10 2013, 04:17 AM jpnovak I hope Mark doesn't mind my response. I am pr... Aug 10 2013, 06:18 AM Krieger Very cool to see the cutting edge printing edge a... Aug 10 2013, 09:27 AM McMark Thanks for chiming in Jamie. I didn't know if... Aug 10 2013, 09:39 AM polo classic Did you ever consider using Boxster/997/996 parts,... Aug 22 2013, 02:43 PM McMark Cool! Hadn't seen that. I'd like to t... Aug 22 2013, 05:23 PM tscrihfield This looks very cool! What are you going to h... Aug 22 2013, 05:37 PM McMark If the prototype adapters work ill send the CAD fi... Aug 22 2013, 06:24 PM jcd914
If the prototype adapters work ill send the CAD f... Aug 22 2013, 08:02 PM edwin This part has "home cast aluminium" writ... Aug 23 2013, 07:12 AM veekry9
This part has "home cast aluminium" wri... Oct 27 2013, 04:15 PM rhodyguy home cast? as in a garage? Aug 23 2013, 07:24 AM McMark Actually I do. Casting has been on my todo list fo... Aug 23 2013, 08:01 AM jbyron Looking at the pic, I'm concerned whether or n... Aug 23 2013, 09:38 AM GeorgeRud Yeah, it does look like you might have to lift it,... Aug 23 2013, 06:20 PM McMark George is thinking along the same lines as me. ;)
... Aug 23 2013, 06:29 PM McMark Quick update...
Intake manifolds are at the machi... Oct 26 2013, 10:59 PM tscrihfield
Quick update...
Intake manifolds are at the mach... Oct 26 2013, 11:28 PM veekry9 This is Great.
Thanks for showing the World the la... Oct 27 2013, 03:49 PM sixnotfour These are mine. A little different from Mark... Nov 8 2013, 02:03 PM 914Timo
These are mine. A little different from Mark... Nov 9 2013, 12:16 PM McMark Wow, looks great. Perfect timing, cause I just go... Nov 8 2013, 04:14 PM jimkelly absolutely beautiful :wub: Nov 8 2013, 04:15 PM sixnotfour sweet !! How are you adjusting the 2mm ... Nov 8 2013, 04:59 PM McMark TBD. I should actually have them in my hands in a... Nov 8 2013, 06:08 PM sixnotfour mine are machined aluminum, with the flanges welde... Nov 9 2013, 04:06 PM jpnovak Those look great! Nov 9 2013, 08:31 PM rick 918-S Nice projects :beer2: Nov 9 2013, 10:59 PM sixnotfour :beer2: Nov 17 2013, 03:52 PM Dave_Darling It looks cool, but what's the perforated metal... Nov 17 2013, 10:48 PM McMark Those are Jeffs, but it's a mount. It ties th... Nov 17 2013, 11:07 PM ConeDodger
Those are Jeffs, but it's a mount. It ties t... Nov 18 2013, 10:04 AM sixnotfour
Those are Jeffs, but it's a mount. It ties ... Nov 18 2013, 02:43 PM McMark Here's my adapters. Got a sample piece in bar... Nov 18 2013, 12:13 PM Series9 I REALLY like it!
:beer2: Nov 18 2013, 12:21 PM JmuRiz Very cool stuff, definitely keeping my eye on this... Nov 18 2013, 12:31 PM |
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