914 Type R build Options

[bam914]

I have a 914 trans with a 4.8 final drive if the stock one is too tall.

[fasthonda]

I have a 914 trans with a 4.8 final drive if the stock one is too tall.

Blake,

I'm Interested. How much?

With a power band from 6500 to 8500 rpm I will definitely need to shorten the gear ratios. I calculated I need E,K,Q gear sets for 2,3,and 4. These are probably be hard to find.

Also needing a set of 15x7 fuchs wheels.

Michael

[degreeoff]

If you can find me a set of 15x8's straight and true I'll trade ya foe my 7's....I assume you mean 5 bolts yes?

[bam914]

I have a 914 trans with a 4.8 final drive if the stock one is too tall.

Blake,

I'm Interested. How much?

With a power band from 6500 to 8500 rpm I will definitely need to shorten the gear ratios. I calculated I need E,K,Q gear sets for 2,3,and 4. These are probably be hard to find.

Also needing a set of 15x7 fuchs wheels.

Michael

This will not change the RPM drop between gears. It will raise the RPM need to attain the same MPH. I will PM you a price on the trans.

Blake

[Randal]

Added GT style harness bars. Made from U bolts.



I can confirm that an autometer 5" monster tach (pedestal mount version) fits nicely in the stock cluster. Had to build up the diameter just a little for a snug fit.

The U bolts are a nice touch.

Did you just bend them yourself out of steel stock, or did you find some commercially that worked?

[J P Stein]

With your car being considerable lighter than an S2000, you can pull taller gears (lower numerically) than the S2000 set up. Closing up the 3-4-5 gears would be a good plan for a track car but gearing is not a poke & hope opperation. There are plenty of gear charts floating around on the 901 to aid selection. For instance, a stock trans with an F second gear is good to about 69mph @ 8500 rpms with a 22.5 inch diameter tire. I'll send you a chart if you desire.

[fasthonda]

The U bolts are a nice touch.

Did you just bend them yourself out of steel stock, or did you find some commercially that worked?
[/quote]

Heres more details from what I posted in another thread


HD Galvanized U-Bolts
Thread = 3/8 - 16
Dimensions 3 1/16" w X 2 1/2" L

This size worked perfectly. For the flanges I started with flange nuts. Drilled out the thread and ground down the top of the nut and welded in place. They would be much prettier if TIG welded.

The spacing on the fire wall is important. I spaced them the same width as the harness holes in the back of the race seat, which if I remember right is 20 to 25 cm. Just measure the race seats, this width is pretty standard.

I noticed on early GT cars there spacing looks wider than what is ideal for modern race seats.

[fasthonda]

With your car being considerable lighter than an S2000, you can pull taller gears (lower numerically) than the S2000 set up. Closing up the 3-4-5 gears would be a good plan for a track car but gearing is not a poke & hope opperation. There are plenty of gear charts floating around on the 901 to aid selection. For instance, a stock trans with an F second gear is good to about 69mph @ 8500 rpms with a 22.5 inch diameter tire. I'll send you a chart if you desire.

When I get back home Monday I will post the details with ratios and tops speeds for the S2k vs the 914 stock gearing and with the gear sets I choose. Good point though about the car being lighter.

The link below is nice calculator I found online. Easier than setting up a spread sheet in Excel for now. Any help is appreciated. Once I get the car running I will have time to build a second trans. Just in the planning stages now.

http://www.turnzero.com/technical_resource...gear_calculator

Thanks JP

[fasthonda]

With your car being considerable lighter than an S2000, you can pull taller gears (lower numerically) than the S2000 set up. Closing up the 3-4-5 gears would be a good plan for a track car but gearing is not a poke & hope opperation. There are plenty of gear charts floating around on the 901 to aid selection. For instance, a stock trans with an F second gear is good to about 69mph @ 8500 rpms with a 22.5 inch diameter tire. I'll send you a chart if you desire.

Top speeds (mph) in each gear @ 8500rpm S2K vs 914 (205/50-15)

Gear / S2K / 914 (stock) / gears I would like to replace
1 / 40.9 / (A 3.09) 41.3
2 / 62.6 / (F 1.89) 67.6
3 / 86.5 / (N 1.26) 101.3 /(J 1.476) 86.5
4 / 110.3 / (V 0.93) 137.3 / (Q 1.125) 113.5
5 / 130.9 /(ZD 0.71) 179.8 /(V 0.93) 137.3

Finding these 901 gear sets at a reasonable price is probably near impossible.

[J P Stein]

I had a flipped ZD 3rd gear in the shit box. Upshifting from 2nd landed it right in the gut of the power.....it also had the advantage of being free....as it would be for you and would be good to 95-7 mph for ya. The ratio is 1.409.

The other 2 are tougher. Otto's in Venice has as good a selection of oddball 901 gears as anyone on the West Coast. He doesn't sell them cheap, but nobody does.
Figure $4-500 a pop. You may also want to see what D. Evil can do for you. There is also a 901 trans guy in PA (IIRC)who's name escapes me at the moment....getttin' old is a bitch.

[J P Stein]

Here's a V, JUMP!

http://forums.pelicanparts.com/porsche-911...-gear-sets.html

[Downunderman]

You could also try Albins: http://www.albinsgear.com.au/index.php . They make just about every ratio there is for a 901.

[TargaToy]

Update? (IMG:style_emoticons/default/confused24.gif)

[fasthonda]

Update? (IMG:style_emoticons/default/confused24.gif)

We have Ignition! Started it for the first time today and let it run for about 15 minutes. Exhaust tone sounds good and it ran smooth. I need to bleed the brakes and finish some details before I can make the first test drive. Very exciting to hear it run for the first time. (IMG:style_emoticons/default/piratenanner.gif)

Made a lower lip for the radiator air outlet out of aluminum for experimentation and added hold down pins for the engine lid. If the lower lip works I will make it out of a hard rubber or nylon that can withstand an impact.

Also waiting on a new pedal board to finish up the interior.

[bohalrantipol]

Very Nice build! Any data on temps?

[fasthonda]

Very Nice build! Any data on temps?

Thanks for the compliment.

Nothing yet on temps. It will be a while before I can get to the track to really test it out. I'm still preparing it for the first spin around the block (early on a sunday morning since its not legal or insured). I just finished aligning the car, and now in the process of installing a front through body sway bar since the underbody type won't fit due to the radiator line. The plan is to take it around the block the weekend after next. I'll take some better pictures of the car when I get it out on the street. Body work and paint won't happen until the car is hauling ass on track.

32 mm hollow sway bar from Tangarine racing looks like the best bar on the market. Its a little pricey for my budget, but I think I'm gonna go for it instead of using the 22 weltmeister bar I picked up used.

Also put a tranny on the stand to build up with shorter ratios for 3rd, 4th, and 5th. I'll start tearing into that soon as well.

I'm getting to old for this shit, but I can't stop now. I hope to track this car for years to come.

Michael

[TargaToy]

How about some video so we can hear this bad boy run--and see it scoot!

[usa4cheer]

this has been a really good post, it has inspired me to start on an srt4 engine swap that I have had the adapter for a while. I really would have liked to seen more on the motor mount. impressive keep up the good work.

[fasthonda]

this has been a really good post, it has inspired me to start on an srt4 engine swap that I have had the adapter for a while. I really would have liked to seen more on the motor mount. impressive keep up the good work.

Appreciate the comment. Feels good to know I inspired someone. This has been a big project, but if you just keep doing instead of thinking, you'll get it done. I haven't had much time lately to work on the car. It about 95% complete with the exception of paint and bodywork. I completed the front swaybar install and got my Fuchs mounted. Still haven't taken it for that first drive, buts its ready and will hopefully get a chance this weekend. When I do I will post some pics of the cars current state.

I finally decided on a paint scheme. I will be copying the BMW M1 art car by Andy Warhol. Brushing on the art pattern and covering it with a clear. The only panel which will remain a solid color will be the targa roof which will be smooth and gloss back.

I'll be glad to send you more pics of the engine mount. Justshoot me an email.

Hope to be posting some new pics after the weekend.

Regards,

Michael

[fasthonda]

I finally took it on the long awaited first test drive Sunday. Drove it about 2 miles on a back road. The smoothness and sound from the engine was incredible. Only took it to 6k rpm as I didn't have the speed sensor hooked up required for Vtec to engage. Even so the car felt strong. A 4 wheeled motorcycle is the best way to describe it. 9k rpm with Vtec is gonna be unbelievable.

I'm still worried about the cooling system. Its gonna take a much longer drive to evaluate that.

Bodywork and paint are next. Trying to decide between 2 paint schemes
1) Andy Warhol BMW M1 Art Car copy
2) BMW Imola red w/ Silver bumpers and Fuchs.

The car in its current state.