Triumph Sports Cars

engine swaps and other performance upgrades, plus "factory" V8s (Stag and TR8)

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Dan B
Dan Blackwood
South Charleston, WV
(890 posts)

Registered:
11/06/2007 01:55PM

Main British Car:
1966 TR4A, 1980 TR7 Multiport EFI MegaSquirt on the TR4A. Lexus V8 pl

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TR7 LexusV8 conversion
Posted by: Dan B
Date: August 26, 2013 08:45AM

We started work on the TR7 this weekend at Jim's shop.
ls motor.jpg
This it the LS400 engine I was planning to use.
w58.jpg
Along with this transmission


Dan B
Dan Blackwood
South Charleston, WV
(890 posts)

Registered:
11/06/2007 01:55PM

Main British Car:
1966 TR4A, 1980 TR7 Multiport EFI MegaSquirt on the TR4A. Lexus V8 pl

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Re: TR7 LexusV8 conversion
Posted by: Dan B
Date: August 26, 2013 08:47AM

Here is the subframe after we removed the TR7 engine and transmission, and pressure washed it.
subframe.jpg
Lots of bits in the background in buckets and on the floors. Looks like some strut work is needed.


dwtr6v8
Don Watson
West Virginia
(234 posts)

Registered:
12/07/2007 07:45AM

Main British Car:
1974 TR6 Ford 5.0 HO

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Re: TR7 LexusV8 conversion
Posted by: dwtr6v8
Date: August 27, 2013 07:56AM

Man, that 4 cammer looks WIDE! I wish I was there to help, but you two are thankful I'm not. Good progress my friend.


britcars
Phil Ossinger
New Brunswick, Canada
(290 posts)

Registered:
02/02/2009 07:58PM

Main British Car:
1977 MGB Roadster, Rover 3.5 ADVENTURE BEFORE DEMENTIA!

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Re: TR7 LexusV8 conversion
Posted by: britcars
Date: August 27, 2013 12:31PM

Dan, that motor does look very wide and the plenum looks very high too but hard to tell without some reference point. The oil filter seems to hang out there a mile as well. Might take TWO shoehorns for this one.
Phil


BlownMGB-V8
Jim Blackwood
9406 Gunpowder Rd., Florence, KY 41042
(5284 posts)

Registered:
10/23/2007 12:59PM

Main British Car:
1971 MGB Blown,Injected,Intercooled Buick 340/AA80E/JagIRS

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Re: TR7 LexusV8 conversion
Posted by: BlownMGB-V8
Date: August 27, 2013 02:43PM

Phil, you would be amazed at the room inside the TR7 engine compartment. The Aussies who have done this swap tell us they installed the engine by lifting it in from the bottom, the same way the engines were factory installed on the TT7 and TR8 and looking at the frame rails I see no reason to think it won't work just that way, The measurements look right. I believe it will go in with the exhaust manifolds attached, and a full compliment of accessories including low mounted A/C, alternator, and possibly even a P/S pump. We have two oil filter mounts but that is the least of our worries. We're told the stock double bump hood will clear just fine. The fresh air plenum however may be a different matter. We will see about that.

By all accounts this is a considerably easier swap than the Rover V8 and makes for a much nicer daily driver. Mounts should be quite easy and the only serious challenge seems to be the choice of radiator.

Jim


britcars
Phil Ossinger
New Brunswick, Canada
(290 posts)

Registered:
02/02/2009 07:58PM

Main British Car:
1977 MGB Roadster, Rover 3.5 ADVENTURE BEFORE DEMENTIA!

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Re: TR7 LexusV8 conversion
Posted by: britcars
Date: August 27, 2013 08:00PM

It looks like you have it figured out Jim. Dan should be a nice ride when done. I've ridden in Dan's TR7, he graciously chauffered me around during either the Raleigh or Indy v8 met.

take care,
Phil


Dan B
Dan Blackwood
South Charleston, WV
(890 posts)

Registered:
11/06/2007 01:55PM

Main British Car:
1966 TR4A, 1980 TR7 Multiport EFI MegaSquirt on the TR4A. Lexus V8 pl

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Re: TR7 LexusV8 conversion
Posted by: Dan B
Date: August 28, 2013 08:18AM

Phil, you can understand the need to do this! We struggled to keep up in Indy.

Here is a link to my inspiration: [www.britishv8.org]



74ls1tr6
Calvin Grannis
Elk Grove,CA
(1110 posts)

Registered:
11/10/2007 10:05AM

Main British Car:
74 TR6 / 71 MGB GT TR6/Ls1 71 MGB GT/Ls1

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Re: TR7 LexusV8 conversion
Posted by: 74ls1tr6
Date: August 28, 2013 10:08AM

Looks like it will be a fun ride Dan!


Scott68B
Scott Costanzo
Columbus, Ohio
(489 posts)

Registered:
10/25/2007 11:30AM

Main British Car:
1968 MGB GM 5.3 LS4 V8

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Re: TR7 LexusV8 conversion
Posted by: Scott68B
Date: August 28, 2013 12:17PM

Dan,

Looks great! Looking forward to following your progress.

Are you planning on taking it to Colorado next year? :-)


Dan B
Dan Blackwood
South Charleston, WV
(890 posts)

Registered:
11/06/2007 01:55PM

Main British Car:
1966 TR4A, 1980 TR7 Multiport EFI MegaSquirt on the TR4A. Lexus V8 pl

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Re: TR7 LexusV8 conversion
Posted by: Dan B
Date: August 29, 2013 08:25AM

Maybe.


kstevusa
kelly stevenson
Southern Middle Tennessee
(800 posts)

Registered:
10/25/2007 09:37AM

Main British Car:
2003 Jaguar XK8 Coupe 4.2L DOHC/ VVT / 6sp. AT

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Re: TR7 LexusV8 conversion
Posted by: kstevusa
Date: August 29, 2013 08:38AM

Dan, looks like a great combo. some specs on engine please? HP, Torque and PRM Band? Probably has a Hemi type combustion chamber? Should be a pleasure to drive. What R/E ratio and type of diff. do you plan?
See you in Townsend in Oct?


Dan B
Dan Blackwood
South Charleston, WV
(890 posts)

Registered:
11/06/2007 01:55PM

Main British Car:
1966 TR4A, 1980 TR7 Multiport EFI MegaSquirt on the TR4A. Lexus V8 pl

authors avatar
Re: TR7 LexusV8 conversion
Posted by: Dan B
Date: August 29, 2013 02:13PM

Standard engine puts out about 250HP and 260 lb/ft. It is based on a CART/IRL engine design. 3.44 in bore, 3.25 in stroke. 6 bolt mains. I think the SC engine has bigger injectors and puts out a little more than the LS. I read that someplace.

Fot the time being the stock 3.45 differential is being used. I might go to higher gears or upgrade the axle at some point.

I won't be making Townsend this fall. Too much stuff going on that weekend.


Dan Jones
Dan Jones
St. Louis, Missouri
(253 posts)

Registered:
07/21/2008 03:32PM

Main British Car:
1980 Triumph TR8 3.5L Rover V8

Re: TR7 LexusV8 conversion
Posted by: Dan Jones
Date: August 29, 2013 06:05PM

That should be a nice runner when finished. What transmission is that?
Do you have width and height measurements on the Lexus V8?
I've wondered if a Ford 4.6L DOHC engine would fit but have never
measured the engine bay.

Thanks,
Dan Jones


Dan B
Dan Blackwood
South Charleston, WV
(890 posts)

Registered:
11/06/2007 01:55PM

Main British Car:
1966 TR4A, 1980 TR7 Multiport EFI MegaSquirt on the TR4A. Lexus V8 pl

authors avatar
Re: TR7 LexusV8 conversion
Posted by: Dan B
Date: August 30, 2013 07:49AM

Dan, here are the measurements. I found this on Lextreme.com I think, but saved it some time ago. I had to convert it to jpg to post here. If it is not readable for you let me know and I will email you the original I saved. I think it is a pdf.

The transmission is a W58

1uz measurements.jpg



Edited 1 time(s). Last edit at 08/30/2013 07:49AM by Dan B.


Dan Jones
Dan Jones
St. Louis, Missouri
(253 posts)

Registered:
07/21/2008 03:32PM

Main British Car:
1980 Triumph TR8 3.5L Rover V8

Re: TR7 LexusV8 conversion
Posted by: Dan Jones
Date: August 30, 2013 02:24PM

Thanks Dan, I was able to read it. It appears the LS400 engine is approximately 24" tall x 26" wide.
The covers are off as is the upper intake plenum so it's likely a bit larget than that. The Ford
Racing catalog lists the 4.6L DOHC V8 at 30" wide x 29 7/8" tall x 28" deep. It's not clear which
4.6L DOHC that is but it's probably a Mustang engine. I think the Lincoln Mk VIII had the lowest
intake manifold. I know the 1998 Cobra 4.6L intake is taller than the Mk VIII. The new Ford Mustang
5.0L 4V TI-VCT engine is more compact at 28" wide x 27" tall x 26" deep.

It appears there's a chance a Ford 4.6L DOHC engine will fit. Mk VIII engines are all aluminum
and quite inexpensive these days. The one I have in the '63 TBird project is rated at 290 HP
while the 1998 Cobra 4.6L was rated at 305 HP (later versions were 320 HP for the normally aspirated
ones). I may have to do a fit check when I've got the TR8 engine out.

The 5.0L DOHC engines are considerably nicer making over 400 HP but are thin on the ground at
the moment.

Dan Jones



mgb260
Jim Nichols
Sequim,WA
(1751 posts)

Registered:
02/29/2008 08:29PM

Main British Car:
1973 MGB roadster 260 Ford V8

Re: TR7 LexusV8 conversion
Posted by: mgb260
Date: August 30, 2013 05:36PM

Dan B, Cool swap! Is that an adapter I see between the bellhousing and tranny? Are you using Toyota truck flywheel and clutch set?


BlownMGB-V8
Jim Blackwood
9406 Gunpowder Rd., Florence, KY 41042
(5284 posts)

Registered:
10/23/2007 12:59PM

Main British Car:
1971 MGB Blown,Injected,Intercooled Buick 340/AA80E/JagIRS

authors avatar
Re: TR7 LexusV8 conversion
Posted by: BlownMGB-V8
Date: August 31, 2013 04:12PM

Jim, he has a nifty little 16 lb steel flywheel, I bet you it isn't more than 3/8" thick anywhere. We weighed it on my postal scale. Then he has a 6 puck clutch disc with sintered pads and what looks like a pretty heavily sprung hub. I'm not sure what the pressure plate is. But the guy was building a drift car so I'd guess it'll do the trick.

Jim


mgb260
Jim Nichols
Sequim,WA
(1751 posts)

Registered:
02/29/2008 08:29PM

Main British Car:
1973 MGB roadster 260 Ford V8

Re: TR7 LexusV8 conversion
Posted by: mgb260
Date: August 31, 2013 05:05PM

Jim, sounds like a cool setup! I think Dan will be very happy with the performance. The W58 is one of the best, smoothest shifting 5 speeds. I was researching the swap out of curiosity and it seems very popular. There are kits and a couple DIY's on the web.


MGBV8
Carl Floyd
Kingsport, TN
(3181 posts)

Registered:
10/23/2007 11:32PM

Main British Car:
79 MGB, Buick 215

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Re: TR7 LexusV8 conversion
Posted by: MGBV8
Date: September 08, 2013 11:57AM

Quote:
By all accounts this is a considerably easier swap than the Rover V8

Really, why?


Dan B
Dan Blackwood
South Charleston, WV
(890 posts)

Registered:
11/06/2007 01:55PM

Main British Car:
1966 TR4A, 1980 TR7 Multiport EFI MegaSquirt on the TR4A. Lexus V8 pl

authors avatar
Re: TR7 LexusV8 conversion
Posted by: Dan B
Date: September 08, 2013 01:05PM

That comment may have been slightly exaggerated, Carl. Rodney Wells says he had done several Rover engine swaps before he did the 1UZ but he is much happier with the Toyota engine/transmission.
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