MG Sports Cars

engine swaps and other performance upgrades, plus "factory" and Costello V8s

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Scott68B
Scott Costanzo
Columbus, Ohio
(527 posts)

Registered:
10/25/2007 11:30AM

Main British Car:
1968 MGB GM 5.3 LS4 V8

authors avatar
Re: LS4 Into an MGB
Posted by: Scott68B
Date: November 18, 2014 06:43PM

Quote:

As I have mentioned in the past, making buckets of torque down low in the power curve makes no sense in a lightweight sports car. Traction will be an issue.

So, you might want to read this before picking out that new cam:

[www.seight.com]

That was a great read Carl. Thanks for the link and the feedback. What you're suggesting is a great idea and something I'm going to pursue. I think we also talked about potentially configuring the PCM to help reduce timing (torque) under certain conditions, like mashing the throttle in first. I know this was possible with earlier versions of the GM code and suspect something similar is in the F-body code in my PCM. I'm for sure going to look into it.

Unfortunately, I didn't get out to the garage this past weekend. Went to a conference last week and picked up a bad cold there. My wife was insistent that I not go into the cold garage while I was sick. It about killed me on the one hand but it was kind of nice not doing anything for a weekend. That's pretty unusual for me. I did order a few more parts. :) So I'll be shooting for a first start next weekend. Hope to have a few evenings to work on the car during Thanksgiving week as well.


BlownMGB-V8
Jim Blackwood
9406 Gunpowder Rd., Florence, KY 41042
(5625 posts)

Registered:
10/23/2007 12:59PM

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

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Re: LS4 Into an MGB
Posted by: BlownMGB-V8
Date: November 19, 2014 10:05AM

I dunno, I always rather enjoyed having buckets of low end torque. Even not being able to deliver all of it to ground, sometimes that is the point.

Jim


Scott68B
Scott Costanzo
Columbus, Ohio
(527 posts)

Registered:
10/25/2007 11:30AM

Main British Car:
1968 MGB GM 5.3 LS4 V8

authors avatar
Re: LS4 Into an MGB
Posted by: Scott68B
Date: November 20, 2014 08:35AM

Quote:

I dunno, I always rather enjoyed having buckets of low end torque. Even not being able to deliver all of it to ground, sometimes that is the point.

Jim, I do realize you're just stirring the pot a bit but if I ever hope to beat out a 3.4 v6 I'm going to have to do something. :)


Dan B
Dan Blackwood
South Charleston, WV
(943 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: LS4 Into an MGB
Posted by: Dan B
Date: November 20, 2014 08:47AM

He likes to cut donuts.


BlownMGB-V8
Jim Blackwood
9406 Gunpowder Rd., Florence, KY 41042
(5625 posts)

Registered:
10/23/2007 12:59PM

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

authors avatar
Re: LS4 Into an MGB
Posted by: BlownMGB-V8
Date: November 20, 2014 07:58PM

It's not that so much as the 1 lane U-turn.

Jim


74ls1tr6
Calvin Grannis
Elk Grove,CA
(1143 posts)

Registered:
11/10/2007 10:05AM

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

authors avatar
Re: LS4 Into an MGB
Posted by: 74ls1tr6
Date: November 21, 2014 10:46AM

I'm with Jim on this one. I love to throttle control a car in the 1st 3 gears. ;)


Scott68B
Scott Costanzo
Columbus, Ohio
(527 posts)

Registered:
10/25/2007 11:30AM

Main British Car:
1968 MGB GM 5.3 LS4 V8

authors avatar
Re: LS4 Into an MGB
Posted by: Scott68B
Date: December 14, 2014 10:33AM





billymgb1000
bill gaulin
harrisville R.I.
(66 posts)

Registered:
11/30/2012 12:31AM

Main British Car:
1974 MGB V8 LS1 5.3

Re: LS4 Into an MGB
Posted by: billymgb1000
Date: December 14, 2014 10:54AM

Congrats Scott
Isn't it so nice when a plan comes together. so what's left do you have the drive shaft all set ? I also noticed it sounds a little quite. Are you intending to have a sleeper? Well all looks good so far good luck.


74ls1tr6
Calvin Grannis
Elk Grove,CA
(1143 posts)

Registered:
11/10/2007 10:05AM

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

authors avatar
Re: LS4 Into an MGB
Posted by: 74ls1tr6
Date: December 14, 2014 11:41AM

Scott, Congrats on first start up video. Where is your water pump, you know I had to ask? I bet this feels real good for all your hard labor. These engines always start no matter how long they sit.

Awesome Scott!


Moderator
Curtis Jacobson
Portland Oregon
(4372 posts)

Registered:
10/12/2007 02:16AM

Main British Car:
71 MGBGT, Buick 215

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Re: LS4 Into an MGB
Posted by: Moderator
Date: December 14, 2014 11:42AM

Fantastic!!!


RMO 699F
Mike Maloney
SW Ohio
(497 posts)

Registered:
12/09/2007 12:28PM

Main British Car:
MGB Sebring GT, Arkley Spriget, Lotus 7 Stalker 3.9 Rover, 1275cc, 3.4 V6

authors avatar
Re: LS4 Into an MGB
Posted by: RMO 699F
Date: December 14, 2014 11:48AM

Way to go Scott!!


Capt'n Moorgone
Mike Moor
Angola,IN
(110 posts)

Registered:
11/20/2008 07:05PM

Main British Car:
1973 MGB 300 Buick

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Re: LS4 Into an MGB
Posted by: Capt'n Moorgone
Date: December 14, 2014 11:53AM

Great job Scott ! It's sounding like you'll be in Indy for sure! I like the frozen breath in your garage. Isn't winter in the Midwest a blast? Mike


mgb260
Jim Nichols
Sequim,WA
(1912 posts)

Registered:
02/29/2008 08:29PM

Main British Car:
1973 MGB roadster 260 Ford V8

Re: LS4 Into an MGB
Posted by: mgb260
Date: December 14, 2014 05:05PM

Atta Boy! Scott. Congratulations! Sounds Great!


Scott68B
Scott Costanzo
Columbus, Ohio
(527 posts)

Registered:
10/25/2007 11:30AM

Main British Car:
1968 MGB GM 5.3 LS4 V8

authors avatar
Re: LS4 Into an MGB
Posted by: Scott68B
Date: December 14, 2014 07:58PM

Thanks everyone! Here is another one with the O2 sensor screwed into the hole. I've got a hell of an exhaust leak to track down. You can see some evidence of it toward the end of this video. The first video is actually the first start. You can hear my wife come to the door to see what the noise was about....I'm trying to shush her and she proceeds to have a 10 minute conversation with me. LOL.



I'll do another post to detail the adventure I had the past couple of weeks but the bottom line was I had 2 wires crossed on the crankshaft position sensor.....that's a no start condition.

I'll try to address your questions:

Bill, the driveshaft is installed so theoretically, it should be able to move on its own at this point. I've got a little ways to go. Lots of small fabrication jobs at this point. I started the throttle cable today, I am getting there though. As far as the sound, it's difficult to capture on video. I don't think it's that quiet but I'm not looking for that open headers sound either though. I'm pretty sure my neighbors heard some noise! :)

Calvin, yeah it's pretty exciting to hear it come alive! I actually cleaned up the injectors before trying to start it. Soaked them in Seafoam and then used a 9 volt battery to work them a little. It sounded like a few of them were stuck as they didn't "click" right away. As for my water pump, I was thinking about saving some weight and going without one. Is that bad? :)

Mike, I'm giving up trying to predict when it will be ready but it seems like Indy mightbe doable. It actually wasn't as cold as it looked yesterday. It was 50 here today! Having said that, I just ordered cheap eBay insulated coveralls.....the Midwest can be challenging during the winter. :)


Charles
Charles Long
McDonald, TN
(171 posts)

Registered:
09/15/2013 08:54AM

Main British Car:
1966 MGB V6 1994 Camaro 3.4L 60V6

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Re: LS4 Into an MGB
Posted by: Charles
Date: December 14, 2014 10:35PM

Scott, you are on the final lap. I have been watching all the way, thanks for sharing. You called it fun sometime back, I think we all consider it fun. Again thanks for sharing.
charles



BlownMGB-V8
Jim Blackwood
9406 Gunpowder Rd., Florence, KY 41042
(5625 posts)

Registered:
10/23/2007 12:59PM

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

authors avatar
Re: LS4 Into an MGB
Posted by: BlownMGB-V8
Date: December 15, 2014 10:17AM

I know you are glad to see that. Tell you what though, this one will make your eyes wide. I know you will be careful, but even so I expect to hear back from you about just how much it surprised you when you do finally nail it. Congrats,

Jim


MGBV8
Carl Floyd
Kingsport, TN
(3471 posts)

Registered:
10/23/2007 11:32PM

Main British Car:
79 MGB, Buick 215

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Re: LS4 Into an MGB
Posted by: MGBV8
Date: December 15, 2014 10:33AM

Final lap? Looks like you are coming down the homestretch!


Jim Stabe
Jim Stabe
San Diego, Ca
(676 posts)

Registered:
02/28/2009 10:01AM

Main British Car:
1966 MGB Roadster 350 LT1 Chevy

authors avatar
Re: LS4 Into an MGB
Posted by: Jim Stabe
Date: December 15, 2014 05:07PM

Scott

You should try to cure the exhaust leaks. I had some header flange leaks on my LT1 and screwed up the air/fuel balance at idle. I had to correct them before it could be tuned.

Try these [catalog.remflex.com] , they are the best I've seen and will seal up anything and they guarantee it. They are 1/8" thick and compress 50%


Scott68B
Scott Costanzo
Columbus, Ohio
(527 posts)

Registered:
10/25/2007 11:30AM

Main British Car:
1968 MGB GM 5.3 LS4 V8

authors avatar
Re: LS4 Into an MGB
Posted by: Scott68B
Date: December 15, 2014 07:21PM

Great advice Jim. It will never run right with leaks. I'm suspecting the passenger side header isn't seated against the head for some reason. I need to pull it to figure out why. Those gaskets look great, I may have to breakdown and get a set. They aren't overly expensive either. Thanks for the tip!


Jim Stabe
Jim Stabe
San Diego, Ca
(676 posts)

Registered:
02/28/2009 10:01AM

Main British Car:
1966 MGB Roadster 350 LT1 Chevy

authors avatar
Re: LS4 Into an MGB
Posted by: Jim Stabe
Date: December 15, 2014 09:30PM

I originally had a set of dead soft copper gaskets and they showed multiple black leak paths when I took them off. The Remflex don't leak at all.
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