Not defensive at all, just my sense of humor. Either you get it or you don't.
Beyond that, I couldn't give a *****.

I am sorry that your engine left you somewhat disappointed. That happens sometimes. Don't be discouraged.
I remember back in the Group C days when Nissan built a 3.5 liter V12 that made 470 horse power when everyone else was making 650. They gave up and scrapped the project. Perhaps with some development they may have found what they had hoped for.

It sounds defensive . You made it sound like penis length comparison and then posted some excuse-sounding nonsense about "different owners" and "different criteria." For most intents and purposes, these are pretty damn similar, 2.8 SS motors running big cams, similar ports, MFI, and even some Supertec parts (distributor, MFI pump). Very comparable engines.

I don't want to rain on anyone's parade . A Porsche is about enjoyment and its your baby, I don't want to be running around criticizing people for their choices of stuff. BUT, if you ask me what I know, I will tell you unequivocally and that might not make some people too happy. It's a bummer when you spend $ and don't get what you hoped. Yep, it's happened to me, I reallllly don't want to be sounding holier-than-thou but hopefully offering useful insight into this configuration and building the knowledge base on it...

I just re-read my post and wanted to say, 266hp is no slouch out of 2.8L. BUT, it could be gotten more easily out of a 3.0L, or with less effort and special-parts hunting as a 2.8 long-stroke. And then there is torque, both of the longer-stroke and/or bigger motors have a lot more of it. I don't know why you'd want to trade the torque , but the rush of high-rpm power is exciting.

Because this was a street motor, we wanted to be 'all in' by 7800 and that is precisely NOT the reason to do a 2.8SS. . . It's a fine motor, the problem was the reasons for wanting to build it. . . a better reason is you are in a race class that is maxed out in your development and you are limited to 2.8L, and you have cubic dollars and take it to 9200 . . . where the 2.8 long-stroke has SERIOUS durability issues. . .;)

Finally got the dyno numbers back - 382 hp

Wow. Do you have a graph you might be able to post?

Scott, you seem to struggle with the whole "humor" thing.......SmileWavy

On your engine you may have been able to get the performance you were looking for by changing the mixture and adding some timing.
MFI motors run their best when they are rich with a lot of ignition timing. 28 degrees is a starting point with MFI twin plugs but quite often they want more. How much more is part of the tuning process. One of the first 2.8ss engines we built made 305 on street gas with 9.5:1 compression. The key was 33-34 degrees of total.
If we built the pump we would be more than happy to try a different space cam configuration. Let's see if we can find what was let on the table.

Oops - sorry that was my wife's Hemi Jeep;)

To each his own - I can speak only for myself. I did not go the 2.8ss route to maximize power to $, that should be obvious. Matter of fact why would anyone own an old 911 if anything of the sort was their intent? I put the engine in a targa - mercy! I am catering here only to my own agenda. I'm not building the engine to any particular category for racing purposes....however I do track the car for fun.

I can tell you that so far I have gotten exactly what I hoped for - which includes the power, character, appearance and buying experience. In fact one of the few things I've done that have exceeded my expectations. But I was pretty careful to determine what it was that I wanted.

You couldn't have said it better Don. Enjoy your Porsche and spin that 2.8SS.

I may sound pretty 'hot' on here about this. That wasn't my intention...I assure you I would be calm and professional about this in person, maybe even humorous ;) :D

-I realize there are a couple things that I would like to address with mine

I have absolutely nothing bad to say about Henry or his motors, or the parts he ships out the door. The distributor was beautiful and the MFI pump you cannot expect to be tuned right on for a motor like this. He absolutely delivered what I expected. I wanted to spend 20 hours tuning that space cam for it, but that was above the scope of this project and sometimes that's how it goes... Henry, don't even worry about it, you did a fine job

Don, go enjoy the hell out of your 2.8SS. Post a video. I would love to see more about your car and motor, nothing but respect for enthusiasts that can appreciate things like what you've got.

Here is my dyno vid on youtube:

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I was trying to point out for the new folks that come on here and ogle stuff and see shiny parts, that there are sometimes better ways to get where you want to be than the most expensive or the hardest to come by!

To the explorers pushing the limits of the 66mm crank (Mark), good on you. Keep doing it. (Or the 5 lucky dogs with the SuperCrank!) :cool:

Hope I didn't ruffle too many tailfeathers.

Well, in that case, we should advise them to run away fast from the 911's! Go for the 5.0 mustangs!

Scott, thanks for posting the video. I can see the brick wall you hit at around 25 - 30 degree throttle. At full throttle it takes about 10 seconds for things to work out and catch up. Could you send me the dyno sheet? I would like to see whats happening in that area.

Very true, no satisfaction to be had from simply spending the most money.
Good video - I'm sure i remember finding that on YouTube when I was researching

Hi Don,
Great looking engine, should make you Top Dog at the Autocross this season. You should break it in with us at Watkins Glen in June. There are 6-8 of us going 3rd weekend of June. Your car would love WG and so would you!
Don

Mark, the motor is reved from about 2500 to about 5k, held there with a load until full throttle is achieved, then the load is removed incrementally just enough to allow the engine to be working at full load. I think that is what you are seeing. The flat spot is not THAT bad! LOL!

After the motor begins accelerating from 5k +, you can hear it flatten out a bit, just a pause or two...that's the flat spot I mentioned...I can hear it but maybe that's because I know it's there. It thankfully doesn't drop off but I would love to see it just pull right through there...

382 hp?
 

Don

Henry, at the start of this discussion, said this was a 280 hp (I assume flywheel hp) motor. And I think implied that it was not an all-out, most conceivable horsepower, motor. At least not a 20 hour hand grenade.

Porsche got about 310 flywheel hp out of the 2.8 long stroke. 280 flywheel hp (using whatever correction factor one wants to get there from RWHP) is a strong and stout motor.

Did you by any chance hit the wrong key when you typed 382 hp?

Walt

I think Don really did mean the Hemi Jeep because that is modern GT3 RSR hp/L (136) and you don't get there without water cooling, 4 valves and a computer keeping the motor on the absolute ragged edge of detonation...not to mention 9200 rpm , CNC ports and 1000's of hours of development...

You could probably get 382 hp out of a 2.8 SS but I think you would have to spin it to 11k and it would last about 5 minutes...

Yes I was joking, half joking. The Hemi jeep probably is around 382 but the point is that you can easily buy high horsepower vehicles - that are no fun to drive.

To Scott's point there are many options for power that are very fun that don't have to cost a ton of money. Or at least not as much money. The jury is not fully in yet but personally I will probably agree with Henry's comment to "the best engine Porsche never built". Then again this is the route I went, as stated earlier for my own reasons.

If I had no constraints I would have built an engine myself - something probably not as complex as this one. It just wasn't an option at my current life stage with other commitments I need to balance.

If spring ever decides to grace the Midwest I will provide more feedback on power and characteristics - I've only 200 gentle miles on it and since we are currently in nasty weather I decided to drain it to check valves. Maybe by this weekend I'll get it out and start to let it spin.

Don

Thanks Scott, I understand it now. Also thanks to Henry and Don for some great information on the SS engine. I will be starting a thread on my 66 x 100 as soon as my crank and rods get back.

The 66x100 was club raced back in the day by Bill Keith (Honest Bill) in a 914/6 and he felt it was one of the strongest engine he had ever built.
I just finish a transaction with one of our nation's finest who bought the last SuperCrank. His plan is to build a 66x102 using Nickies from LN.

"If you build it, he will come". I guess that applies to the Porsche enthusiasts as well a baseball.

Should be a challenge for sure. I thought about 102's but even the 100 mm piston is getting a little heavy @ 496 grams less pin & rings.

Ty rods, ty wrist pins and FSR pistons will help.

"We'll make it spin no matter how much it costs."