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TVR Scott
TVR Scott GRM+ Memberand SuperDork
6/12/22 2:20 p.m.

Take care of yourself.  My dad got a cough like that back in 2017, had several fights with pneumonia, and has never really been better since.

frenchyd
frenchyd MegaDork
6/12/22 10:07 p.m.
dean1484 said:

Ya I strongly recommend starting at 4-6 lbs of boost. Build the system for 18 lbs in terms of intercooler, fuel etc but start at 4-6 and get the tune perfect then creep up on 12 or what ever your goal is.  
 

12 lbs is a lot for a motor of that displacement and if something  goes wrong it will really go wrong (as in motor destruction). Trust me on this one I am an expert on this. (The adding to much boost to fast and blowing up motor part).   ;-).  

That makes a lot of sense.  Perhaps I'm counting on how strong it is too much.  
    I built a lot of Chevy Small blocks in the past and always replaced everything except the block.  I only kept 4 bolt blocks that had no sign of overheating or spinning bearings.   While I never lost a motor I'd have $15-20, 000 in parts  and machine work in them. That was 1980's-90's money.   My customers were happy to pay those sorts of prices because of the reliability and power they made. 
      
The V12 is the strongest motor I've ever worked on.  Most junkyard motors are in superb condition.  They stop running not because they break.  Rather because so few can figure out how to trouble shoot an EFI engine without OBD2.   The ironic part is often it's the $35  Chevy ignition module  they used  covered with a plastic Lucas cover.  Or even  worse a simple rubber hose that's cracked or broken.   
     Rarely but occasionally a senor will fail  just like any EFI from that period.   
 

yupididit
yupididit GRM+ Memberand PowerDork
6/13/22 7:43 a.m.

In reply to frenchyd :

How much boost were you running on your previous twin turbo setup?

dean1484
dean1484 GRM+ Memberand MegaDork
6/13/22 7:58 a.m.

In reply to frenchyd :

Strength of the block is not usually the problem. Burning holes in pistons or blowing apart ringlands or pounding the big end bearing in to oblivion with detonation are where things go wrong fast. 

frenchyd
frenchyd MegaDork
6/13/22 12:19 p.m.
yupididit said:

In reply to frenchyd :

How much boost were you running on your previous twin turbo setup?

5.5-6psi but it was really kludged up.  I tried to make the stock Bosch triple Rabbit setup work.   
    

frenchyd
frenchyd MegaDork
6/13/22 12:26 p.m.
dean1484 said:

In reply to frenchyd :

Strength of the block is not usually the problem. Burning holes in pistons or blowing apart ringlands or pounding the big end bearing in to oblivion with detonation are where things go wrong fast. 

That's why I'm using the mega squirt EFI system.  Rather than the stock Lucas Analog system that requires  soldering in various triggers to add fuel as needed.  
     So I can monitor the combustion cycle     In real time on the chassis Dyno and change things with a key stroke. 

frenchyd
frenchyd MegaDork
7/5/22 3:54 p.m.

In reply to frenchyd :

Update on Jaguar.   Slightly  over a month ago I came down with Bronchitis.Trips to the doctor with attending prescriptions still haven't  fixed it, the Doctor tells me it might be another month.  
     Little has been done.  A few minutes of work has me coughing my lungs out. Spitting up phlegm.  Requiring bed rest for nearly an hour. 
    But I'm doing a lot of research.  Now that I'm no longer tied to a $2000 limit,  I think I'm going to sell my Megasquirt system and buy a Megasquirt gold.  It's the only one that is designed to actually work with the V12.  While I can use the  batch feature and the ignition is by distributor  which  means the basic/early Megasquirt will run the V12 but the Gold gives me more tuning options.  I'm looking at using windshield washer fluid if intake temps get too high.    

frenchyd
frenchyd MegaDork
7/6/22 1:47 p.m.
1SlowVW said:

In reply to frenchyd :

Even with the e85 you plan on putting in the tank 12psi is not a small amount of boost when coming from na. Get those wastegates down to 4-6psi and start there. 

12psi is almost 1 bar, which means ignoring a whole bunch of other factors your almost doubling the VE of the engine. Yours almost doubling the pressure of the air rushing into the cylinder when the intake valves open. 

I guess I'm not clear.  I won't fire up the engine and run it at full boost full throttle.  
   While Mega squirt has a self learning function  I'm only going to use that to get it running and slowly get it running with the right fuel mixture.   Once it's sorted to that degree it goes on the chassis Dyno to  set mixtures and timing   To a conservative level. I always trade horsepower for reliability.  Even with straight from the junkyard stock engine.  While the V12 can be bought cheaper than you can buy a LS motor,  no sense in being stupid just trying to make some number on the dyno. 
  I'm pretty sure I'll be the fastest V12  on the race track.  (I'll probably be the only V12 too)   I know there will be guys who spend $20-30,000  on their motor. While I'll have $2-300 in mine.  So I'm sure I'll win the $500 or less bracket/class.  ;-)

frenchyd
frenchyd MegaDork
7/16/22 3:08 p.m.

Rolling the Jaguar around.  On its roof this time to remove all the undercoating.  

yupididit
yupididit GRM+ Memberand PowerDork
7/16/22 3:13 p.m.

In reply to frenchyd :

How much does it weigh in this state? 

frenchyd
frenchyd MegaDork
7/16/22 4:52 p.m.

 I don't know.  I'm guessing it's around the 2700 pounds that the Group 44 raced with on their second one.  
 The first one was 3140 I think ( I have it at home )  the first one was all steel except the hood. 

Second one was 2780 if I remember correctly  fiberglass hood, trunk lid, and fenders.   Mine will also have fiberglass doors. The stock empty doors (no glass) weigh about 100 pounds each and the fiberglass replacements will be under 20   

The last ( tube frame, all fiberglass, except the roof panel)  weighed 2540 and had to be ballasted to meet minimum weight.  With the engine set back 8 inches ( allowed by the rules) it was actually tail heavy. 

kb58
kb58 SuperDork
7/16/22 6:25 p.m.
frenchyd said:
...Rarely but occasionally a senor will fail...

 

When I first read that, I saw "...occasionally a senior will fail..." Yes, this is fairly common with Jags, just sayin'

kb58
kb58 SuperDork
7/16/22 6:29 p.m.

Yeah tuning a forced-induction engine is a lot like mapping out an ice-covered lake and finding the edge of where it's safe to venture. You don't just run right out there.

I'll leave you with a quote from a discussion about turbo cars - an exaggeration, perhaps, but not if you don't build and tune it correctly:

… a turbo engine is like having a cokehead pornstar girlfriend. There’s going to be unparalleled excitement and thrills, but a lot of unexplainable downtime and a likely violent ending that leaves you broke and insane…

frenchyd
frenchyd MegaDork
7/16/22 11:37 p.m.
kb58 said:
frenchyd said:
...Rarely but occasionally a senor will fail...

 

When I first read that, I saw "...occasionally a senior will fail..." Yes, this is fairly common with Jags, just sayin'

I agree with that sentiment. Plus almost all the sensors on Jaguar's  ( until Fords ownership) were analog, not digital. So they will all be swapped over to GM sensors. That way the mega Squirt will be able to talk to them.  ( I should attempt to do a Cockney accent here. ) 

frenchyd
frenchyd MegaDork
7/16/22 11:46 p.m.
kb58 said:

Yeah tuning a forced-induction engine is a lot like mapping out an ice-covered lake and finding the edge of where it's safe to venture. You don't just run right out there.

I'll leave you with a quote from a discussion about turbo cars - an exaggeration, perhaps, but not if you don't build and tune it correctly:

… a turbo engine is like having a cokehead pornstar girlfriend. There’s going to be unparalleled excitement and thrills, but a lot of unexplainable downtime and a likely violent ending that leaves you broke and insane…

Oh two things.  I'm conservative with regard to tuning.  It will get plenty of nice cool alcohol even if it does cost me a little power.  
 And second,   Boost will be limited to a number the engine shows no signs of distress at. 
  Elkhart  Lake is 4 miles long with 3 long straights.  Climbing up the hill on the main straight is going to put plenty of strain  on the engine and I take more pride in driving it back up into the trailer than I would get from passing someone only  to DNF 

Tom1200
Tom1200 UltraDork
7/17/22 12:05 a.m.

On a off topic note my son saw an XJS parked up last week and said "What's that!"

frenchyd
frenchyd MegaDork
7/17/22 12:12 a.m.

In reply to Tom1200 :

In a positive way or negative?  If he is seriously interested in one.  Please don't give him nightmares by opening the hood.  
   My first glance  at the V12 was Group 44's without all the luxury and pollution junk.  Just a clean race motor. 
Even today I hate looking at a stock V12. 

kb58
kb58 SuperDork
7/17/22 1:39 a.m.
frenchyd said:
...I take more pride in driving it back up into the trailer than I would get from passing someone only  to DNF 

Oh I dunno... I once got to harass a Porsche GT3 in Midlana, at Streets of Willow. Though the engine let loose soon after, it was still fairly "priceless" as far as memories go, that something I built could keep up with such a beast. Skip to 7:50 if you don't want to watch the whole thing:

 

dean1484
dean1484 GRM+ Memberand MegaDork
7/17/22 9:36 a.m.

How you doing health wise?  Getting better I hope?   Keep on top of it as from your description that sounds a lot like like Pneumonia to me.  

Floating Doc (Forum Supporter)
Floating Doc (Forum Supporter) GRM+ Memberand PowerDork
7/17/22 9:46 a.m.
dean1484 said:

How you doing health wise?  Getting better I hope?   Keep on top of it as from your description that sounds a lot like like Pneumonia to me.  

Yes, I'm concerned about that too. Chest X-ray yet? I'd call that a requirement. Seriously.

dean1484
dean1484 GRM+ Memberand MegaDork
7/17/22 10:06 a.m.

Bronchitis seems to be the stepping stone to Pneumonia. Everyone I know that gets bronchitis seems to come back later and say it was pneumonia. 

frenchyd
frenchyd MegaDork
7/17/22 11:23 a.m.

In reply to dean1484 :

Thank you for your concern. I do get regular pneumonia shots as a school  bus driver.  Because I've had as many as 6 cases in a school year several of which were double pneumonia.   
  This was confirmed by my doctor as bronchitis with 3 visits. Because of my age (74) recovery is a slow process. 
     The symptoms    are very similar to the reaction to dry air caused by air conditioning overnight. But those go away with a pint of water and a 10 minute shower. 

frenchyd
frenchyd MegaDork
7/17/22 11:28 a.m.
Floating Doc (Forum Supporter) said:
dean1484 said:

How you doing health wise?  Getting better I hope?   Keep on top of it as from your description that sounds a lot like like Pneumonia to me.  

Yes, I'm concerned about that too. Chest X-ray yet? I'd call that a requirement. Seriously.

My wife has very excellent health insurance so off to the Doctor I go whenever there is health ( or dental ) issue.   
Plus I follow medical orders, and in general my health is darn good.  Except for my addiction to sugar.  Which keeps me in shape.  ( round is a shape isn't it?) 

frenchyd
frenchyd MegaDork
7/17/22 11:34 a.m.

In reply to kb58 :

I understand the fun of chasing.   The black Jack special finished its career with the same engine I originally put in it. 
    Today it sits in the Packard museum with that same engine. 46 years later.  

frenchyd
frenchyd MegaDork
7/17/22 2:13 p.m.

Two hours of scrapping undercoating off  I'll bet there is 2-3 pounds there  

 To those wondering Why I'm doing this, I crawled all over and under  Group 44's cars and the cleanliness of the underside matched the topside.  
  That and  undercoating  probably  adds  50 pounds to the car.    Plus some turbulence to air flow.

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