Triumph Sports Cars

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

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MGBV8
Carl Floyd
Kingsport, TN
(3235 posts)

Registered:
10/23/2007 11:32PM

Main British Car:
79 MGB, Buick 215

authors avatar
Re: TR7 LexusV8 conversion
Posted by: MGBV8
Date: September 14, 2013 08:04AM

He should be. You will be, too. It's an awesome engine/tranny combo.

What W58? I found a 1986.5 Toyota Supra MK3 for $250.


Dan B
Dan Blackwood
South Charleston, WV
(906 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 14, 2013 12:07PM

That may be what I have, I'm really not sure. The adapter and the 1uz bellhousing are the expensive parts, and the guy I got the engine and trans from had already gotten all that together as well as the flywheel, clutch and htob to build a drift car with a Nissan 240SX, He decided to go with a 350 instead


mgb260
Jim Nichols
Sequim,WA
(1811 posts)

Registered:
02/29/2008 08:29PM

Main British Car:
1973 MGB roadster 260 Ford V8

Re: TR7 LexusV8 conversion
Posted by: mgb260
Date: September 14, 2013 01:48PM

Carl, Dan has the 86.5 and newer. The shifter is a little further back than the 83-85.
pb29006311_83a9.jpg


MGBV8
Carl Floyd
Kingsport, TN
(3235 posts)

Registered:
10/23/2007 11:32PM

Main British Car:
79 MGB, Buick 215

authors avatar
Re: TR7 LexusV8 conversion
Posted by: MGBV8
Date: September 14, 2013 04:11PM

Thanks, Jim. I just ran across it, Wasn't sure if I should snatch it up. Hmm, maybe for my MG TF?


mgb260
Jim Nichols
Sequim,WA
(1811 posts)

Registered:
02/29/2008 08:29PM

Main British Car:
1973 MGB roadster 260 Ford V8

Re: TR7 LexusV8 conversion
Posted by: mgb260
Date: September 14, 2013 05:01PM

Carl, They are one of the smoothest shifting 5 speeds out there. About the same strength as the T5. Of course that is with a new nylon ball socket and aftermarket shifter. What engine are you going to run? There are some Jeep and Dakota AX5 bellhousings that will bolt up the AMC 4 or GM small V6. Or Novack has a small block Chevy adapter.



Edited 1 time(s). Last edit at 09/14/2013 05:03PM by mgb260.


MGBV8
Carl Floyd
Kingsport, TN
(3235 posts)

Registered:
10/23/2007 11:32PM

Main British Car:
79 MGB, Buick 215

authors avatar
Re: TR7 LexusV8 conversion
Posted by: MGBV8
Date: September 15, 2013 12:58PM

In my TF? May still go with a TD 1250 that I have. The original TF 1500 is long gone.


waterbucket
Philip Waterman
England
(58 posts)

Registered:
07/30/2011 01:08PM

Main British Car:
1978 MGB GT

Re: TR7 LexusV8 conversion
Posted by: waterbucket
Date: September 15, 2013 03:52PM

If you look under drivetrain issues you will see that I am attempting to fit a 4.6 dohc modular engine in an MGB and have had a trial fitting without exhaust headers and it will fit. Whether I will manage to get headers to fit in the tight space that is left is another matter!
The engine weighs 440 lbs (200kg) it is 235/8 inches long 28 inches wide and 28 inches high. I have mated it to a T5 gearbox using a 302 bellousing with the dowel holes drilled out to 16mm. My engine is a new 1999 Cobra with 320 bhp.
The mk VIII engine is the same dimensions except it is only 24 inches high.
I also looked at fitting the lexus engine but decided it was just too wide at the sump and with cheap modular engines in the UK decided to give it a try.



Dan B
Dan Blackwood
South Charleston, WV
(906 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 23, 2013 08:41AM

Here is a pic of the motor mounts we will be using.
motor mounts.jpg


MGBV8
Carl Floyd
Kingsport, TN
(3235 posts)

Registered:
10/23/2007 11:32PM

Main British Car:
79 MGB, Buick 215

authors avatar
Re: TR7 LexusV8 conversion
Posted by: MGBV8
Date: September 23, 2013 04:12PM

Hmm, those look like an improvement over what we use in the BV8 conversions. Wonder if they are close enough to work.


Dan B
Dan Blackwood
South Charleston, WV
(906 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 25, 2013 11:55AM

They are Rover mounts.


Dan B
Dan Blackwood
South Charleston, WV
(906 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: October 02, 2013 08:36AM

New radiator just arrived yesterday. Tentative plans for next work weekend at Jim's is Oct.12-14. I get Columbus Day as a holiday.
summit radiator.jpg


BlownMGB-V8
Jim Blackwood
9406 Gunpowder Rd., Florence, KY 41042
(5354 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: October 02, 2013 09:56AM

I think that will work OK. Let's check with Steve (and Carl). We can do a little work on the race car too.

Jim


Dan B
Dan Blackwood
South Charleston, WV
(906 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: October 03, 2013 03:11PM

Poly Subframe bush set from Woody.
poly subframe bush set.jpg


Dan B
Dan Blackwood
South Charleston, WV
(906 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: October 03, 2013 03:12PM

The poly subframe bushes came from Woody yesterday.
poly subframe bush set.jpg


BlownMGB-V8
Jim Blackwood
9406 Gunpowder Rd., Florence, KY 41042
(5354 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: October 03, 2013 08:13PM

What's left, strut parts and maybe some exhaust couplers?

Jim



BlownMGB-V8
Jim Blackwood
9406 Gunpowder Rd., Florence, KY 41042
(5354 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: October 14, 2013 08:26AM

Dan B posting here. I wrote this post on Jim's computer and he was already logged in.

It has been an intense weekend working on the TR7 so far. I have pictures to post, but am writing this from Jim's laptop so I will need to put those up later. Immense thanks to Jim for all his hard work and expertise. He fabricated awesome engine mounts to allow for a clean shot for the steering shaft. Also thanks to Carl for coming up on Saturday and lending a "calibrated eye"

The australians said this engine looks like it grew there, and they are right! I think a Toyota engineer must have used a TR7 for a mule or something. The oil sump fits right in the recess in the subframe and there is a depression in the front of the pan to clear the steering rack. The plenum exactly fits in the stock TR7 hood bulge.

Today we are going to modify the tranny crossmember to accept a Supra transmission mount, then put the car in the barn until the next trip.
'



Edited 1 time(s). Last edit at 10/14/2013 08:28AM by BlownMGB-V8.


BlownMGB-V8
Jim Blackwood
9406 Gunpowder Rd., Florence, KY 41042
(5354 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: October 14, 2013 03:21PM

Dan is headed home, might as well add my two cents in. The fit of this engine in this car is nothing short of amazing. The only thing more you could possibly wish for is a little more clearance for the hood latch and maybe some more room for the fan, but those are pretty minor concerns as the TR7 uses two pusher fans normally.

Now to recap, this is the 1UZ out of a Lexus 400SC (or Soarer). Other Lexi are equipped differently and will not fit as easily.
So the stock tubular exhausts work just fine. In fact there is just about 5/8" between the frame rail and the end of the closest stud on each side where the down pipes bolt on. The shifter is about 1/2" back from the front edge of the stock hole and has a rearward bend so the knob sits in about the same place. The pan just clears the rear of the subframe. The block just clears the firewall and the A/C lines. the pan sits (in this install) about 1/2" above the steering rack so the mounts can sag better than 1/4" and still have plenty of clearance. And the hood closes on it with probably about 1/2" clearance all around, at least that's what it looked like at the points where we checked it with clay, though we will look at it again later. There is interference with the stock plastic elbow that comes out of the throttle body and turns forward, and we softened the top of it with a heat gun and pressed it down with the hood. Not a satisfactory solution yet, but it could be used and possibly gotten to look OK but an aluminum 90* bend and tube might be better. There appears to be room enough for the radiator (2" aluminum Griffith from Summit) and a slimline fan of some type, we will know more when the radiator is in.

We did space the sub frame down 1" in accordance with accepted practice, using hockey pucks for spacers and these will be fitted with spacer tubes as well. This does not change the ride height and is reputed to improve anti-dive characteristics. Costs about $20 for pucks and long bolts. We used the stock passenger side block mount for the engine mounts and adapted the Rover engine mount to it by making a custom nut. Rectangular and square tubing was welded to the subframe to complete the mount. On the driver's side due to the steering shaft we duplicated the Lexus block mount in steel, relocating the stud hole outboard and forward. It may be possible to switch sides with the mounts and get it to work but we didn't try that.

Basically, this engine in the TR7 looks like it grew there. I think Dan is going to be very happy with the end result, and I think a lot of people will be surprised to see it. I don't know what he will end up doing with the OEM stuff on top of the engine but as it sits now the average person looking under the hood *might* notice the Lexus logo but other than that would just think they were looking at any other late model car.

Jim


Dan B
Dan Blackwood
South Charleston, WV
(906 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: October 14, 2013 08:18PM

Here is a shot of the custom nut made to attach Rover motor mounts to the 1UZ
IMG_0925.jpg
IMG_0926.jpg


Dan B
Dan Blackwood
South Charleston, WV
(906 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: October 14, 2013 08:21PM

The SC400 engine getting ready to move into position on Saturday night. We spent the day prepping the subframe and working on motor mounts.
IMG_0927.jpg
Next step, position the engine under the car


Dan B
Dan Blackwood
South Charleston, WV
(906 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: October 14, 2013 08:25PM

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