Home  |  Forums  |  914 Info  |  Blogs
 
914World.com - The fastest growing online 914 community!
 
Porsche, and the Porsche crest are registered trademarks of Dr. Ing. h.c. F. Porsche AG. This site is not affiliated with Porsche in any way.
Its only purpose is to provide an online forum for car enthusiasts. All other trademarks are property of their respective owners.
 

Welcome Guest ( Log In | Register )

2 Pages V  1 2 >  
Reply to this topicStart new topic
> 914 Hayabusa Build
eatpez
post Oct 4 2018, 11:31 PM
Post #1


Newbie
*

Group: Members
Posts: 2
Joined: 4-October 18
From: Michigan
Member No.: 22,543
Region Association: North East States



My brother and I picked up a couple rollers and have started our builds. The plan is to put supercharged Hayabusa engines in them, upgrade the suspension and brakes and get them on the road (safely) before working on anything cosmetic.

We picked them up from Keith down in Nepoleon, OH and he recommended I document the build here.

My brother is working now on the fab for the engine cradle and sourcing the transfer case to drive the rear axles. My job at present is to beef up the suspension and brakes to handle the planned 300+HP.

Mine is the black 74 which will probably end up with steel GT flares. My brother's is the primed and glassed out 72.

Let the fun begin!

(If anyone has 5-lug / brake upgrade parts available, please PM me)


Attached thumbnail(s)
Attached Image Attached Image
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
second wind
post Oct 5 2018, 12:00 AM
Post #2


Member
**

Group: Members
Posts: 322
Joined: 30-December 10
From: Los Angeles, California
Member No.: 12,543
Region Association: Southern California



This is going to be fun.....imagine all kinds of 914's powered by who's knows what? Don't quote me on this....(in Topanga, Calif. thursday is little friday)...but a few small batteries and a itty bitty tiny electric motor could be really exciting....the way things are going...$4 regular is starting to bug me....
gg
User is online!Profile CardPM
Go to the top of the page
+Quote Post
SirAndy
post Oct 5 2018, 12:07 AM
Post #3


Resident German
*************************

Group: Admin
Posts: 38,847
Joined: 21-January 03
From: Oakland, Kalifornia
Member No.: 179
Region Association: Northern California



100 ftlb of torque at 8000rpm doesn't sound like fun in a 2000+ lbs car ...
(IMG:style_emoticons/default/wacko.gif)
User is online!Profile CardPM
Go to the top of the page
+Quote Post
porschetub
post Oct 5 2018, 12:22 AM
Post #4


Advanced Member
****

Group: Members
Posts: 3,053
Joined: 25-July 15
From: New Zealand
Member No.: 18,995
Region Association: None



QUOTE(SirAndy @ Oct 5 2018, 07:07 PM) *

100 ftlb of torque at 8000rpm doesn't sound like fun in a 2000+ lbs car ...
(IMG:style_emoticons/default/wacko.gif)

(IMG:style_emoticons/default/agree.gif) ,not even worth going there.
User is online!Profile CardPM
Go to the top of the page
+Quote Post
Andyrew
post Oct 5 2018, 12:56 AM
Post #5


Spooling.... Please wait
**********

Group: Members
Posts: 12,465
Joined: 20-January 03
From: Riverbank, Ca
Member No.: 172
Region Association: Northern California



Sounds like a fun build! Looking forward to seeing the progress. I have concerns on in town driveability but I can't imagine it would be any worse than an old bug, but with 5x the top end..
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
falcor75
post Oct 5 2018, 01:41 AM
Post #6


Senior Member
***

Group: Members
Posts: 1,252
Joined: 22-November 12
From: Sweden
Member No.: 15,176
Region Association: Scandinavia



The busa engine is a rocket in something like a Seven but in a 914 with twice the weight I'm more sceptical. Curious but sceptical. (IMG:style_emoticons/default/smile.gif)
User is online!Profile CardPM
Go to the top of the page
+Quote Post
mb911
post Oct 5 2018, 04:05 AM
Post #7


Advanced Member
****

Group: Members
Posts: 3,608
Joined: 2-January 09
From: Burlington wi
Member No.: 9,892
Region Association: Upper MidWest



Its what they use on the cars at Disney for the stunts show.. They rip pretty good.
User is online!Profile CardPM
Go to the top of the page
+Quote Post
jd74914
post Oct 5 2018, 11:12 AM
Post #8


Its alive
****

Group: Members
Posts: 4,283
Joined: 16-February 04
From: CT
Member No.: 1,659
Region Association: North East States



QUOTE(SirAndy @ Oct 5 2018, 01:07 AM) *

100 ftlb of torque at 8000rpm doesn't sound like fun in a 2000+ lbs car ...
(IMG:style_emoticons/default/wacko.gif)

It's all about tractive force, not engine torque. Geared correctly it's a much different picture. In any case, 300 hp @ 10k is 157 ft*lbs of engine torque so not too bad. Hypothetically [to equate to a traditional car engine] with gearing to bring the input engine speed into a conventional transmission back down to normal, you'd be the equivalent of a 314 ft*lb torque at the input shaft. Not too shabby.

Interested to see some progress! (IMG:style_emoticons/default/smile.gif)
User is online!Profile CardPM
Go to the top of the page
+Quote Post
jd74914
post Oct 5 2018, 11:14 AM
Post #9


Its alive
****

Group: Members
Posts: 4,283
Joined: 16-February 04
From: CT
Member No.: 1,659
Region Association: North East States



QUOTE(eatpez @ Oct 5 2018, 12:31 AM) *

My brother is working now on the fab for the engine cradle and sourcing the transfer case to drive the rear axles. My job at present is to beef up the suspension and brakes to handle the planned 300+HP.

So are you making a shaft adapter to replace the sprocket? Or going with a chain drive differential like you'd see in a formula car. I made a shaft once on a dyno and it worked out pretty nicely.
User is online!Profile CardPM
Go to the top of the page
+Quote Post
milwlandrover
post Oct 5 2018, 11:18 AM
Post #10


Member
**

Group: Members
Posts: 133
Joined: 22-June 12
From: Greendale Wisconsin
Member No.: 14,592
Region Association: Upper MidWest



You guys never cease to amaze me, on both sides of the argument.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
tygaboy
post Oct 5 2018, 11:38 AM
Post #11


Advanced Member
****

Group: Members
Posts: 2,257
Joined: 6-October 15
From: Petaluma, CA
Member No.: 19,241
Region Association: Northern California



I have a project car that is motorcycle powered. It's a tube chassis Nash Metropolitan and I'm using a Honda ST1300 V4.

Just my $0.02:
The only real issue I'm worried about is how the stock motorcycle clutch will hold up to the added wright. I'm targeting 2x the ST1300 weight which gives me ~ 1300 lbs as my target.

In a 914, that Hyabusa engine is going to be asked to deal with somewhere upwards of ~ 3x the weight (Hyabusa weighs about 475 lbs).

I know they get upwards of 450 hp out of the turbo 'Busas so I'm sure there are uprated clutches available. I'd be focused on looking into this as an initial design item.

Best of luck w/the builds and remember: We LOVE, LOVE, LOVE pics!
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
SirAndy
post Oct 5 2018, 11:49 AM
Post #12


Resident German
*************************

Group: Admin
Posts: 38,847
Joined: 21-January 03
From: Oakland, Kalifornia
Member No.: 179
Region Association: Northern California



QUOTE(jd74914 @ Oct 5 2018, 10:12 AM) *
QUOTE(SirAndy @ Oct 5 2018, 01:07 AM) *
100 ftlb of torque at 8000rpm doesn't sound like fun in a 2000+ lbs car ...
(IMG:style_emoticons/default/wacko.gif)
It's all about tractive force, not engine torque. Geared correctly it's a much different picture. In any case, 300 hp @ 10k is 157 ft*lbs of engine torque so not too bad. Hypothetically [to equate to a traditional car engine] with gearing to bring the input engine speed into a conventional transmission back down to normal, you'd be the equivalent of a 314 ft*lb torque at the input shaft. Not too shabby.
Interested to see some progress! (IMG:style_emoticons/default/smile.gif)

Have you ever driven a 914 with a high reving engine with comparatively low torque?

I have, and unless you are driving around a race track where you are near the rev limit for 95% of the time, those kinds of engines are the exact *opposite* of "fun to drive".

(IMG:style_emoticons/default/shades.gif)
User is online!Profile CardPM
Go to the top of the page
+Quote Post
Rand
post Oct 5 2018, 11:50 AM
Post #13


Cross Member
*****

Group: Members
Posts: 6,808
Joined: 8-February 05
From: OR
Member No.: 3,573
Region Association: None



Bikes weigh less than cars. I hope you get that first. I mean really get it. Some physics education might be helpful. The first time you want to impress your friends and drop the clutch hard.... All of that stuff laying around the street will be your blinging reward.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
tygaboy
post Oct 5 2018, 11:56 AM
Post #14


Advanced Member
****

Group: Members
Posts: 2,257
Joined: 6-October 15
From: Petaluma, CA
Member No.: 19,241
Region Association: Northern California



Forgot - Reverse is always fun with motorcycle powered cars. Here's what I did:
This is a Transworks MiniDif. It's a cut down VW transaxle with all but one forward gear and reverse removed. There's a lever that lets you switch between forward and reverse.

Pics are of my ST engine and then one with an inline 4 motor, like you're running.

So yes, with a motorcycle engine, you get just as many reverse gears as forward!

There are a few other options for reverse but I like this one since it allows for more ways to solve the grearing issues that tend to come when you move from motorcycle sized tires to car sized. At least unless you're running larger diameter tires.

Feel free to PM me, if I can help in any way.
Chris


Attached thumbnail(s)
Attached Image

Attached image(s)
Attached Image
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Rand
post Oct 5 2018, 12:04 PM
Post #15


Cross Member
*****

Group: Members
Posts: 6,808
Joined: 8-February 05
From: OR
Member No.: 3,573
Region Association: None



Chris, I love how you always bring it to another level.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Rand
post Oct 5 2018, 12:09 PM
Post #16


Cross Member
*****

Group: Members
Posts: 6,808
Joined: 8-February 05
From: OR
Member No.: 3,573
Region Association: None



If you can turn down the music, this can be an interesting watch... (you may have to skip a lot to get to the good stuff..)

https://youtu.be/s5Q_rGllPVs
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
andys
post Oct 5 2018, 01:06 PM
Post #17


Advanced Member
****

Group: Members
Posts: 2,103
Joined: 21-May 03
From: Valencia, CA
Member No.: 721
Region Association: None



Perhaps one might consider the Honda Gold Wing 1800 engine/trans; has a reverse. While HP numbers are not real impressive, it is a flat 6, so it should sound like a Porsche.
Andys
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
sixnotfour
post Oct 5 2018, 01:22 PM
Post #18


914 Guru
*****

Group: Members
Posts: 8,099
Joined: 12-September 04
From: Life Elevated..planet UT.
Member No.: 2,744
Region Association: Rocky Mountains




obviously it'll need a turbo (IMG:style_emoticons/default/silver914.jpg)


https://www.engineswapdepot.com/?p=19545&
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
76-914
post Oct 5 2018, 01:22 PM
Post #19


Repeat Offender
**********

Group: Members
Posts: 10,524
Joined: 23-January 09
From: Temecula, CA
Member No.: 9,964
Region Association: Southern California



QUOTE(jd74914 @ Oct 5 2018, 10:12 AM) *

QUOTE(SirAndy @ Oct 5 2018, 01:07 AM) *

100 ftlb of torque at 8000rpm doesn't sound like fun in a 2000+ lbs car ...
(IMG:style_emoticons/default/wacko.gif)

It's all about tractive force, not engine torque. Geared correctly it's a much different picture. In any case, 300 hp @ 10k is 157 ft*lbs of engine torque so not too bad. Hypothetically [to equate to a traditional car engine] with gearing to bring the input engine speed into a conventional transmission back down to normal, you'd be the equivalent of a 314 ft*lb torque at the input shaft. Not too shabby.

Interested to see some progress! (IMG:style_emoticons/default/smile.gif)

I'd like to know more about tractive force vs. torque. Possibly we can see this explained in "layman's terms" for us non-engineer's. Maybe a different thread so as to not hi-jack this thread.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
sixnotfour
post Oct 5 2018, 01:25 PM
Post #20


914 Guru
*****

Group: Members
Posts: 8,099
Joined: 12-September 04
From: Life Elevated..planet UT.
Member No.: 2,744
Region Association: Rocky Mountains




obviously it'll need a turbo (IMG:style_emoticons/default/silver914.jpg)


https://www.engineswapdepot.com/?p=19545&
User is offlineProfile CardPM
Go to the top of the page
+Quote Post

2 Pages V  1 2 >
Reply to this topicStart new topic
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:

 



- Lo-Fi Version Time is now: 15th July 2019 - 03:00 PM