How easy is it to install an aftermarket tach?

[Bimmerguy2002]

Do they come with instructions generally on which wires to use?
I heard they usually use the distributor on old cars but am not familiar with ignition systems.

[Brad D.]

While I havent specifically installed an aftermarket tach on a BMW, it should work just fine. Typically you use the negative connection on the coil or the reference signal to the ecu. I know Autometer has instructions on their site if you want to check them out.

[c_spargo]

Do they come with instructions generally on which wires to use?
I heard they usually use the distributor on old cars but am not familiar with ignition systems.

Um, why do you need one?

[Kyle in NO]

Man, you'd think a "restored" car would use a stock tach....

Why the shit would you put an aftermarket tach in an E28?

[Mless5]

Rice baby!

[Brad D.]

Yeah, I cant imagine that a 5" monster tach with requisite super sized shift light would complement the e28 dash very well.

[BKCowGod3]

I parked next to a Civic with that tach and an automatic tranny today.

[Wiseguy]

Man, you'd think a "restored" car would use a stock tach....

Why the shit would you put an aftermarket tach in an E28?

Exactly what I was thinking.

Unless he's restoring a base Euro 518i without one or something.

[Bimmerguy2002]

haha, like i said again guys, its just the interior minus, the headliner, i gotta put the glovebox back in after changing the ECU yesterday, and the under steering column stuff from looking at the joint on the steering, and the console from the a vent repair
Just to lazy to put it back in.
Everything else is nominal, ready to put in suspension, lazy....
Ready to put in engine...lazy...

I have all the stuff im just lazy as hell. In fact so lazy, i could have put in the bilsteins months ago but too busy interneting

The paint can wait cause its gonna be about 6 grand for the paint...gotta sell some houses to come up with that money though

I asked cause we are building a special motor for my friend in stockton's car and it needs to exceed 6 grand on the tach. Way past 6k.
Please dont flame me , cause this motor is coming together quite nice and should be a tick ahead of an M5 when all is said and done.
The one i have in mind, goes right in front of the stock tach, mounted on the dash.

So basically it reads he signal from the ECU and it tells it to move the needle up correct?

[Wiseguy]

Why not fit an M5 tach?

[booker]

Just to lazy to put it back in.
lazy....
...lazy...
im just lazy as hell. In fact so lazy

I know the answer. But I'm too lazy to post it.

[Bimmerguy2002]

Huh? What are you talking about?
Im lazy, end of story.
Im not putting in a "M5 tach" cause we want something different, i dont think a M5 tach can read 9-10,000 RPM anyway.
Im not a joke, i know what im doing when it comes to building internals and custom cranks/heads (getting the specs for one to be machined). i know whats good for what, and where.
Ive probably read over 100 books on engine theory and blueprinting. When i talk to machinists, its funny cause everything they know i know.
When its done, this motor should be able to rev up to about 9,200 RPM. I had all the parts described in another topic but too lazy to dig them up.
that is with THOUSANDS of dollars, ill have in about a year or so to blow.
its no different from an M5 in hoping that i can produce 300 Horsepower, with a naturally aspirated motor, many cars do it, with a SOHC setup also. No different from a STi, EVOVIII, S2000 2.2, or a RX-8 RENESIS, its that those motors are built for racing, and most cars arent.
The cam, valve springs, rockershafts, rockerarms, crankshaft, connecting rods, pistons, bearings, all going to be replaced with high performance parts. Especially the crank.
Custom intake (especially that Horsepower robbing intake manifold, which is still only good for low end torque, which is being built in japan.
Throw some velocity stacks on there, fuel management, and some nitrous or propane and we'll be good to go.

I dont know why people bash Japanese cars especially, a Subaru STI, with 320 Horsepower and the stage III turbo kit for 375 HP, will smoke the crap out of a stock 528e.

[FastFiver]

I dont know why people bash Japanese cars especially, a Subaru STI, with 320 Horsepower and the stage III turbo kit for 375 HP, will smoke the crap out of a stock 528e.

No shit. All that reading about engine theory really has you understanding that a purpose-built AWD car with a turbo and 375 hp will "smoke" an economy-based car with 120 hp.

Amazing.

Will you please let us in on your secret to better than 256 hp in an M20? I'd love to know how you can make it produce better than double the power without a turbo.

Everyone, listen to this guy... maybe he will put Todd out of business and save us thousands of dollars that we would have wasted on silly turbos and proven performance parts.

God you are annoying to no end.

[Bimmerguy2002]

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[Bimmerguy2002]

all i asked was it hard to install a tach.....
*posts goatse*

[EuroShark]

Should be easy to install... they all come with basic instructions.

And why do you need to rev to 9200rpm to make 300hp?? Oh, right, you don't...

[M635CSi]

Im not a joke, i know what im doing when it comes to building internals and custom cranks/heads (getting the specs for one to be machined). i know whats good for what, and where.

Let me see if I understand this correctly;

You have the experience, training and expertise to design, spec and assemble a 6 cylinder BMW engine that can spin to 9,200 RPM.

But,

You're stuck on installing a tachometer.

Alrighty then...

[Shawn D.]

Im not a joke, i know what im doing when it comes to building internals and custom cranks/heads (getting the specs for one to be machined.

Machining is secondary to how the crank is produced, and machining doesn't make anything "custom." Are you having a crank individually produced (not merely machined) to your own specs? What material, and what treatment processes are you going to specify?

When its done, this motor should be able to rev up to about 9,200 RPM.

I seriously doubt that.

No different from a STi, EVOVIII, S2000 2.2, or a RX-8 RENESIS, its that those motors are built for racing, and most cars arent.

Yes, it is different. The first three cars have significantly different valvetrains (and are 4-valve/cylinder to boot) and the last is a rotary. You need to work on your comparison skills.

Custom intake (especially that Horsepower robbing intake manifold, which is still only good for low end torque, which is being built in japan.

Yeah, we all know that Japan is a hotbed of M20 intake manifold development.

[Shawn D.]

Im not a joke, i know what im doing when it comes to building internals and custom cranks/heads (getting the specs for one to be machined). i know whats good for what, and where.

Let me see if I understand this correctly;

You have the experience, training and expertise to design, spec and assemble a 6 cylinder BMW engine that can spin to 9,200 RPM.

But,

You're stuck on installing a tachometer.

Alrighty then...

Uhh... I don't see anywhere that he mentioned, experience, training, or expertise -- just the ability to read! He must've fallen asleep just before he got to the tach installation book -- it is a voluminous and complicated manual, you know!

[Bimmerguy2002]

Im not saying that anywhere has the best parts, but the company we are getting the intake from is stationed in Japan, and is one of the best over there. As long as you have the blueprints and money, anything can be done. Its gonna be like the "M5" sorta, with velocity stacks, individual throttle bodies for each cylinder, and a fuel system (rice style), with a lap top to push the air/fuel mixture from 13:1 (rich), 14.7:1 (stoichiometric air-fuel ratio), and lean 17:1 (lean).

Yes the crank is going to be completely custom, single piece of solid steel billet. Even the 524td cant handle that amount of bearing load. It would bend at about 7,300 most likely.

I dont know electrical cause i never sat down and read it cause it confuses me. All i know how is to install stereos for electrical.

I never said it was going to be a duplicate of the M20 intake, everything on that motor is going to be illegal and changed.
Its a restrictive setup for the factory and meant for fuel economy.

I dont know why people bash Japanese cars, i would love to see a DC92 (euro M5) run with a RB25DET (skyline R34 turbo).
Thats 286 HP vs. 280 HP respectively.
Even match?
They are both straight six's too.
Should be an even match correct?


thanks to you guys who answer'D my question

[EuroShark]

I dont know why people bash Japanese cars, i would love to see a DC92 (euro M5) run with a RB25DET (skyline R34 turbo).

The M5 uses an S38 except for the very early models with the M88/3.

Anyhow, go ahead and spend the mad money for a custom crank and whatnot to spin 9200rpm. You will have the most expensive, highest revving naturally aspirated BMW on the board! Whoo! If it only makes 300hp you will be ridculed mercilessly and forever labeled a jackass, for sure. I'm not trying to flame, I just don't see the point AT ALL of building one to spin that fast when you can make 300hp naturally aspirated with an M30 spinning at most 7200rpm, and you won't need a custom crank, intake manifold, etc. Or you could strap a turbo to it and run a moderate amount of boost and easily make over 300hp. Thank God it's not my money...

[c_spargo]

I dont know why people bash Japanese cars, i would love to see a DC92 (euro M5) run with a RB25DET (skyline R34 turbo).

The M5 uses an S38 except for the very early models with the M88/3.

Anyhow, go ahead and spend the mad money for a custom crank and whatnot to spin 9200rpm.

Ahhhhh, 9200 RPM....

[EuroShark]

Nasty!! Haha, very nice.

[Bimmerguy2002]

i forgot to add, my goal is the M20 block, strengthened, the head block, strenthened.
Just the castings, everthing else is custom.
And naturally aspirated.
I dont like turbos and supercharge for various reasons.
And i know the M30 is good, but im trying to fix the underdog to set a record.
I know its a waste of money, im not gonna be popular or anything, im doing this for myself to see how it turns out
Everything is a waste of money really

If a forumla one car can rev up to 18,000 RPM, surely a super modified engine can rev up to nine grand

[Boru]

So, is this going in a street car? At what rpm do you plan to make the peak 300ish Hp?

[c_spargo]

i forgot to add, my goal is the M20 block, strengthened, the head block, strenthened.
Just the castings, everthing else is custom.
And naturally aspirated.
I dont like turbos and supercharge for various reasons.
And i know the M30 is good, but im trying to fix the underdog to set a record.
I know its a waste of money, im not gonna be popular or anything, im doing this for myself to see how it turns out
Everything is a waste of money really

If a forumla one car can rev up to 18,000 RPM, surely a super modified engine can rev up to nine grand

Ok - I can't really stand it. If you've had all this time and spoken with all these machinists, surely one of them has told you your piston acceleration at that point is mindboggling. Can't tell whether I'm being baited here or not.

A modern F1 car has a stroke in the 45mm range. That's less than two inches for those following along at home. Also, note that that is with pistons that weigh less than 150 grams, and are changed out EVERY WEEKEND.

Also, an F1 car has a mean piston speed around 4500 ft/mn. Anything over 4000 is considered an EXTREMELY short-lived design.

Unless you're MASSIVELY destroking the crankshaft, your stroke length is nearly twice that, and I have to imagine your pistons will weigh at least twice what an F1 piston does.

A quick look at your plans puts you at around 5200 ft/mn piston speed. I wasn't really going to post this, but it occurred to me that there are a lot of unscrupulous folks in the world happy to seperate an enthusiastic owner from his vehicle in exchange for grand promises of performance. In case this described you, I thought you should know the truth.

[RobbieR]

Click here>>>The speed you need for 9,200rpm's

[Wiseguy]

I dont know why people bash Japanese cars, i would love to see a DC92 (euro M5) run with a RB25DET (skyline R34 turbo).
Thats 286 HP vs. 280 HP respectively.
Even match?
They are both straight six's too.
Should be an even match correct?

That's not the point. I owned an R32 GTR in England and it was very fast. It also didn't "do it" for me.

If I wanted a Skyline I would buy one. I do not so I will not. I want an E28 M5, I own one, life is good.

Carry on then.. steady as she goes.

[Bimmerguy2002]

I aint gonna read all that ^^^^^^ but i know why it can reach such high RPM's (formula 1 cars)
If i didnt know which specs i need i would ask.
I aint gonna use cheap cast pistons or anything.
I also know that lighter has less weight so you can go much further with it. Im not a dumbass, i know what specs i need.
And i only talk to one machinist, i usually hang out at shops cause most people around my age just smoke weed and drink, which is not my thing. I would rather be putting together engines or cornering on the backroads by my house, (in a safe enviroment i might add, and if i die, i die, oh well)

[booker]

So................

You really haven't figured out how to install an aftermarket tach on a single coil system yet?

Have you read the @#%&*(*%#$# directions yet? Have you done a Google search!?

Geeze.

(hint: you shouldn't have to ask with your expertise)