12v71 TI Detroit’s

[luckydave215]

Re: 12v71 TI Detroit’s

I got my information from Roger Wetherington - you know, the engineer who designed the systems?
He told me Hatt made two like mine, and concluded it was a fool's errand. However, they ran 25kts in the river behind the plant.
Look, the little 214 cubic inch six in my SUV makes 450hp, land speed bikes commonly make 2000 reliable hp out of a 1,000 cc four cylinder.
A 12v71 @ 1000 is agricultural in comparison.

 

[kelpy]

Re: 12v71 TI Detroit’s

Just having the extra compression ratio point afforded by the NA pistons will most likely be all that is required to get the extra horsepower. Keep that cooling system in top shape. Do you have the DD heat exchangers or the big Sendur units on your engines?

 

[Bayside Bert54]

Re: 12v71 TI Detroit’s

I got my information from Roger Wetherington - you know, the engineer who designed the systems?
He told me Hatt made two like mine, and concluded it was a fool's errand. However, they ran 25kts in the river behind the plant.
Look, the little 214 cubic inch six in my SUV makes 450hp, land speed bikes commonly make 2000 reliable hp out of a 1,000 cc four cylinder.
A 12v71 @ 1000 is agricultural in comparison.

Let's have a bet. We'll have a technician look at your engines. I'll put $1000 on it ... you in? It's BS. A technician will take a quick look at the turbo's and injectors and climb out saying ... yep .. 850hp or so 12V71-TI like the rest of the high performance 12V71-TI's.... if you wanted the 1000hp or so, those are the 12v92 or larger engines.

Show me the 1000 hp agricultural 12V71-TI with 1000 hp. I'm completely unaware of that .. so are you or you might have posted the link.

 

[kelpy]

Re: 12v71 TI Detroit’s

He would be a pretty poorly trained technician if he made a determination like that based on such limited information.

I suppose I could search around for a bit and find a multitude of high output Detroit Diesels but then, so can you.

It would have been fairly straightforward to obtain the information you seek when Covington was around but alas, it is no more. I have no idea if the old Hatteras engine records are in existence or not. I guess we will just have to go what the gentleman says his engines produce and be done with it. At least I will.

 

[Bayside Bert54]

Re: 12v71 TI Detroit’s

He would be a pretty poorly trained technician if he made a determination like that based on such limited information.

I suppose I could search around for a bit and find a multitude of high output Detroit Diesels but then, so can you.

It would have been fairly straightforward to obtain the information you seek when Covington was around but alas, it is no more. I have no idea if the old Hatteras engine records are in existence or not. I guess we will just have to go what the gentleman says his engines produce and be done with it. At least I will.

I searched ... there are none. Not a single hot rod 12V71-TI with 1000 or more hp. Anyway .. do you buy investments? Just joking ... I'm out.

His 12V71-TI's will lose a turbo or injector this year or so and that is when he will learn he has a plain old 850hp TI's.

 

[ageless]

Re: 12v71 TI Detroit’s

anyone but me realize the original poster, edward, hasn't responded since origination of the thread? I'm amazed that there are people out there that are so closed minded they refuse to believe something is possible. I bet in 1955 when the small block chevy debuted no one EVER believed it could pump out 1000hp, yet here we are

 

[ageless]

Re: 12v71 TI Detroit’s

I searched ... there are none. Not a single hot rod 12V71-TI with 1000 or more hp. Anyway .. do you buy investments? Just joking ... I'm out.

His 12V71-TI's will lose a turbo or injector this year or so and that is when he will learn he has a plain old 850hp TI's.

you SHOULD buy investments with your uncanny ability to see the future

 

[captcrunch]

Re: 12v71 TI Detroit’s

Correct me if I’m wrong but aren’t 12-71s essentially 2 671s bolted together? If so 671tibs were max rated 485hp so 2 together would be 970

 

[kelpy]

Re: 12v71 TI Detroit’s

They are a single block of 12 cylinders.

 

[ageless]

Re: 12v71 TI Detroit’s

Correct me if I’m wrong but aren’t 12-71s essentially 2 671s bolted together? If so 671tibs were max rated 485hp so 2 together would be 970

I'm dying here

 

[ageless]

Re: 12v71 TI Detroit’s

They are a single block of 12 cylinders.

I have 13 cylinders in my TA's

 

[captcrunch]

Re: 12v71 TI Detroit’s

Didn’t mean literally bolted together would have to assume it obviously would be a 12 cylinder casting. I meant from a mechanical aspect of the internals and such.

 

[Bayside Bert54]

Re: 12v71 TI Detroit’s

All LuckyDave needs to do is go to his engine room and take some decent photos of his turbos. I'm quite sure they are identical to mine. That would be the R5101513. The injectors are likely the R5229715. If the current injectors are different, it's likely they have the same flow as the newer R5229715 injectors. That would make his engine identical to mine, and also 850-860hp.

It would be as simple as thumbing through some receipts. Nobody owns one of these boats long without replacing a turbo or injector. Prove me wrong.

 

[Cricket]

Re: 12v71 TI Detroit’s

Enough already with this nonsense regarding 40 year old engines.
DD ruined their high end marine business because they took the easy/cheap route to higher horsepower resulting in reliability/longevity issues instead of developing new engines.
I don't consider the 92 series a new engine because they're basically the same 2 strokes as the 71's with a larger bore and stroke.
Also, DD supported the current owners with replacement parts that were for the most part just crap compared to what was originally available.
The Series 60 platform was not introduced until 1987, which is a great engine, they should have been developing 4 stroke engines long before, which probably would have totally changed DD's eventual outcome.
Imagine what could have been with Series 60 type V8/V10/V12/V16 instead we ended up with imported German 4 stokes from MTU to fill DD's space.

 

[kelpy]

Re: 12v71 TI Detroit’s

Not nonsense at all. When I run across a thread I don't care for, I just pass it by.

Detroit Diesel didn't have the capital to develop a new line of marine engines at the time so they did what they could with what they had. Roger Penske gave it a shot but it didn't take long before MTU came along and bought the company for their DDEC technology.

There was the good ol' Toro Flow V8!

 

[luckydave215]

Re: 12v71 TI Detroit’s

All LuckyDave needs to do is go to his engine room and take some decent photos of his turbos. I'm quite sure they are identical to mine. That would be the R5101513. The injectors are likely the R5229715. If the current injectors are different, it's likely they have the same flow as the newer R5229715 injectors. That would make his engine identical to mine, and also 850-860hp.

It would be as simple as thumbing through some receipts. Nobody owns one of these boats long without replacing a turbo or injector. Prove me wrong.

I have zero interest in arguing with a keyboard warrior.
Have it your way - who cares?

 

[SKYCHENEY]

Re: 12v71 TI Detroit’s

The Series 60 was developed under Penske. It is a great engine. I've got one in my motorhome, 1500hp and burns zero oil. They claim its a 1 million mile engine.

Just kidding, its only 500hp But no lack of power through the mountains.

 

[ageless]

Re: 12v71 TI Detroit’s

I have zero interest in arguing with a keyboard warrior.
Have it your way - who cares?

well said though

 

[Cricket]

Re: 12v71 TI Detroit’s

Actually Series 60 had just gone into production before Penske bought his first stake (60%) in DD which he increased to 80% 6 months later. One of his genius moves in the acquisition was to lease the brand new Series 60 production tooling for $500 per engine built instead of purchasing it outright from GM for $160mil.

 

[Eddieclemons]

Re: 12v71 TI Detroit’s

16v71s were two 8v71's bolted together. I vividly remember the 1st time I had one go full throttle after a improper rack setup and throttle sync that I had just completed. I got some stern correction for the screw up and for improperly screaming runaway when it wasn't. Oh to be 18 again. Great times.