In reply to a message from cadjag sent Wed 6 Dec 2006:
Well I am only using a 4L80E because I want a 700 rear wheel HP car
that I can mercilessly beat on and not blink an eye. I belong to a
GenIII chat board (www.ls1tech.com) and a lot of people running
over 500rwhp through their 4L60Es have problems keeping them on the
road. Between the forged bottom end, 4L80E and Dana44, my
driveline is definitely overbuilt.
People say a lot about the parasitic loss on the 4L80E, but when
you get a āābuiltāā 4L60E they usually crank up the pump pressureā¦
and the power to run that has to come from somewhere. The 4L80E is
about 70lbs heavier than the 4L60E.
The GenIII pans are cast aluminum and a hassle to work with. I
bought a Cadillac CTS-V pan that will need about 1āā taken off the
front of the sump.ā
The original message included these comments:
The LS1 is a very interesting engine. Does it really need the 4L80?
why not use a 4L60?
The LS1 pan is aluminum, I think and as such sectioning is a more
difficult project than a tin LT1 pan, right?
In reply to a message from Rob Wade sent Thu 7 Dec 2006:
Hi Rob,
As far as finding a LSD 3,07 diff you will have as much luck
finding a Unicorn.They are listed in a Factory manual for the
OZ market which most replacement suppliers cannot recall ever
having one.I did have a straight 3.07 in replacement for a few
months for 3.31 lsd and there did not seem to be any gain
whatsoever to the car,
As far as a 6.6% lower ratio making much difference I would not
expect much for all the trouble involved.If you have a fairly
strong cam then why not degree it for another 3* to4* advance for
earlier lift.The gain is there and the cost would average only 400
rpm off the top end which very few drivers rarely see anyway.
I run a 222*@50/1000āā with a total advance [after chain stretch]
of 6*,Lift with 1.6 roller rockers gives approx .495āā straight up
and down with TFS 195 heads.The torque spread has to be used to be
believed and I wish I had a 2.88 to replace the 3.31 as there is no
4th gear in the 1978 Daimler.I only use a 2000 rpm convertorā¦
As I have said that there are at least 30 ways of doing a Lump &
this is only one of them.By the way,The 4 cam LT5 motor that was
for sale is still for sale after all this time for $10000 and no one
wants it. All the best from Kelpie in OZā¦ā
The original message included these comments:
Now, I would LUUUUUUUUUUUV to find a 3:07 posi to put in my combo.
Donāt get me wrong, I am very happy with my current TPI/700R4/2:88
combo BUT I would do the car differently IF this drivetrain werenāt
in the car when I bought it AND I was starting fresh.
Rob Wade
In reply to a message from kelpie sent Thu 30 Nov 2006:
I am a Cadillac 500 buff.If you want power and torque in a light
package to spin the 2.88 rear end consider the caddy 500.It is a
cheap engine to build up to 425HP and will give you high teens
mileage.Check out www.cowboyseven.us to see what these motors can
do.Otherwise I would go with a modern LS1 or LT1.Suncoast
conversions makes a kit to drop the Caddy 500 and turbo 400 into an
XJ.This is my own plan by the way as well.
Sincerely Fitzā
FJ
Kingston,Ontario, Canada
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In reply to a message from FJ sent Thu 7 Dec 2006:
Hi FJ,
The Caddy motors are like henās teeth out here and spares are
over the top for money and availability.Having said that I donāt
doubt for one second that the torque and reliabilty are 1st class.
IF I were 30 years younger and I could do it all over again I
think John Lingenfelterās 420 SBC based on a Rocket block gives
525 H.P and 540 Tq, would be a considerationā¦all the best.Kelpie
in OZ,ā¦ā
The original message included these comments:
I am a Cadillac 500 buff.If you want power and torque in a light
package to spin the 2.88 rear end consider the caddy 500.It is a
cheap engine to build up to 425HP and will give you high teens
Sincerely Fitz
FJ
Kingston,Ontario, Canada
In reply to a message from kelpie sent Thu 7 Dec 2006:
Well Iām glad I started a great thread on here! Thereās been lots
of good discussion in here.
To those suggesting an LT1 swap. It is of course something to
consider. However here is my thinking on the matterā¦ I could buy
another whole car already converted to an LT1 for as much as it
would cost me to convert mine. Then I could sport 2 awesome lumps.
Perhaps a nice Series III would be in order since I have a Series I
already.
My whole thinking with the LS V8s is that it would be unique (until
someone makes a kit, which will inevitably happen) and it will be a
step up from the LT1 at the cost of some extra coin and hassle. To
me itās either cheap, simple, old school carbed SBC or LS1. LT1
just seems to be in the middle, having some of the virtues of the
old SBC and some of the LS1 but does neither as well as the others.
Itās a compromise. But thatās just my opinion, and for some perhaps
it makes sense to them.
However thatās not to say I might not get sidetracked and buy an
LT1 car, because they are good. I just donāt think itās worth doing
this car up with an LT1 since it already has a 350. I think going
LS is the only way to fly. LS or bust!ā
Black On Black 1972 Jaguar XJ6 Powered by A Chevy 350
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In reply to a message from exer51 sent Fri 8 Dec 2006:
Hi 51,
I canāt see a problem with any of the choices and I always say
It Is Your Money.Also remember we all Sink or Swim by our choices
and decisions.Mine is To Go with What you Knowā¦All the
Best,Kelpie in OZ,ā
The original message included these comments:
In reply to a message from kelpie sent Thu 7 Dec 2006:
However thatās not to say I might not get sidetracked and buy an
LT1 car, because they are good. I just donāt think itās worth doing
Black On Black 1972 Jaguar XJ6 Powered by A Chevy 350
Donāt disrespect my LT1ās Go put your ls1 in and Iāll see you on the track.
I get an average 22 mpg and burn thru 2 gears with large sticky rubber. Ls
1ās are a very tiny step up with their own weaknesses.
In reply to a message from kelpie sent Thu 7 Dec 2006:
Well Iām glad I started a great thread on here! Thereās been lots
of good discussion in here.
To those suggesting an LT1 swap. It is of course something to
consider. However here is my thinking on the matterā¦ I could buy
another whole car already converted to an LT1 for as much as it
would cost me to convert mine. Then I could sport 2 awesome lumps.
Perhaps a nice Series III would be in order since I have a Series I
already.
My whole thinking with the LS V8s is that it would be unique (until
someone makes a kit, which will inevitably happen) and it will be a
step up from the LT1 at the cost of some extra coin and hassle. To
me itās either cheap, simple, old school carbed SBC or LS1. LT1
just seems to be in the middle, having some of the virtues of the
old SBC and some of the LS1 but does neither as well as the others.
Itās a compromise. But thatās just my opinion, and for some perhaps
it makes sense to them.
However thatās not to say I might not get sidetracked and buy an
LT1 car, because they are good. I just donāt think itās worth doing
this car up with an LT1 since it already has a 350. I think going
LS is the only way to fly. LS or bust!
In reply to a message from Gary Etsell sent Fri 8 Dec 2006:
Hi Gary,
I donāt think that there is any dis respect in not having a LS
motor. It all comes down to freedom of choice and personal likes
and dislikes.In a true sense the LS motors are still new boys in
town compared to the old brigade.
The 1st generation were not perfect and the LS motors were
needed to come into the new era and they will have their turn in
popularity.They will or wont survive on their merits.Consider the
changes that have been made to All Small block Chevs in the last
decade including a certain water pump idea that was prone to failure
which you donāt have to suffer just to mention one improvement that
did not work out too good for the new owners.Life goes onā¦
All the very best from Kelpie in Australiaā¦ā
The original message included these comments:
Donāt disrespect my LT1ās Go put your ls1 in and Iāll see you on the track.
1ās are a very tiny step up with their own weaknesses.
GARY
In reply to a message from Gary Etsell sent Fri 8 Dec 2006:
True the early 5.7L LS1 and the 5.7L LT1 are very very close
performance wise. However, the 5.7L LS1 is just the tip of the
iceberg for the GenIII/IV engine family. Rather than getting a Z28
pullout, perhaps you can get your hands on a stock 6.0L 400hp GTO
pullout. The mid production Corvette Z06 engines were rated over
400hp and go up from there. Even the regular Corvette boasts
400hp/400ft/lbs torque. Now available in Escalades is a 6.2L block
and the Corvette Z06 7.0L engine has 505hp/470ft/lbs torqueļæ½ see
where this is going? Larger and more powerful stock engines that
hold their own in fuel economy.
You can make the power you want with either the LS1 or the LT1 ļæ½
both platforms are proven. I think the real challenge is getting
the power to the ground and balancing between speed, reliability
and fuel economy.ā
The original message included these comments:
I get an average 22 mpg and burn thru 2 gears with large sticky rubber. Ls
1ās are a very tiny step up with their own weaknesses.
In reply to a message from Gary Etsell sent Fri 8 Dec 2006:
There is no disrespect at all. All Iām saying is with my car I
donāt think doing an LT1 swap is worth it. Like I said I could just
buy a whole new car in good shape with an LT1 already under the
hood for not much more than putting one into my car. 2 complete
lumps seems better than 1 to me. So for the car I have now I say
either keep the Gen I, or go LS1ā¦ Or buy a whole other car and
have 2 if I want an LT1, and keep the one I have with a Gen I.ā
The original message included these comments:
Donāt disrespect my LT1ās Go put your ls1 in and Iāll see you on the track.
I get an average 22 mpg and burn thru 2 gears with large sticky rubber. Ls
1ās are a very tiny step up with their own weaknesses.
GARY
In reply to a message from exer51 sent Fri 8 Dec 2006:
There is only one clear answer!!!
Fix the SBC you now have. It will be a great driver at the very
least!
Buy or convert an SIII to LT1. Little or no turn around time and
you are in a great car!
Convert a nice SII! to LS1. This is your challenge car that will
take a while to develop and get on the street!
How much better can it get?
Were I about 10 or 15 years younger, I would start on choice three
as I already have choice 2. When I started on my LT1 it was a
serius challenge to my automobile knowledge. My last project was a
flat head Ford, and the one before that was a FJ40 Toyota 4 x 4
Land cruiser!
Look how far you have come! All you wanted to know is how much
power would a JAGUAR differential handle!!
Decisions, decisions, Good luck
Carlā
The original message included these comments:
There is no disrespect at all. All Iām saying is with my car I
donāt think doing an LT1 swap is worth it. Like I said I could just
buy a whole new car in good shape with an LT1 already under the
hood for not much more than putting one into my car. 2 complete
lumps seems better than 1 to me. So for the car I have now I say
either keep the Gen I, or go LS1ā¦ Or buy a whole other car and
have 2 if I want an LT1, and keep the one I have with a Gen I.
In reply to a message from cadjag sent Fri 8 Dec 2006:
Since I first started looking for a lump to buy Iāve thought I
should get all 3 Seriesā. I mean hell, for 5 grand a pop you can
get quite a solid vehicle. I saw a silver Series II coupe for sale
for like 4k in ok shape about a month agoā¦ Real low original
miles, but it needed new paint and some other things done. If I
wanted to be real cool Iād get an XJ6C and do that up with an LS2.
I think at the least I will probably end up with all 3 series
sooner or later. Having a coupe LS2 though would be truely awesome.
Although since the coupes are quite rare Iād almost feel bad about
it.ā
The original message included these comments:
Fix the SBC you now have. It will be a great driver at the very
least!
Buy or convert an SIII to LT1. Little or no turn around time and
you are in a great car!
Convert a nice SII! to LS1. This is your challenge car that will
take a while to develop and get on the street!
In reply to a message from exer51 sent Sat 9 Dec 2006:
Congrats on the LSx choice. I personally would do that platform if
I were to do it again. BE CAREFULL in your takeout (if you go that
route) corvettes and some other models are fly by wire throttle
bodies. These do not use a conventional throttle cable but a switch
on the gas pedal and a poteniometer on the TB. Just more hassle to
contend with on your conversion. Camaros and Trans Amās use a cable.ā
Rob Wade
Windsor Ontario, Canada
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In reply to a message from Rob Wade sent Sat 9 Dec 2006:
Haha yea, I forgot to mention the drive by wireā¦ that should be a
nice little treat in itself. I pulled the drive by wire throttle
body and pedal assembly from a vette that I parted out. Hopefully
whoever makes my harness will be able to account for that. I donāt
think I will have too much of a problem replacing the gas pedal.
Weāll see!ā
The original message included these comments:
Congrats on the LSx choice. I personally would do that platform if
I were to do it again. BE CAREFULL in your takeout (if you go that
route) corvettes and some other models are fly by wire throttle
bodies. These do not use a conventional throttle cable but a switch
on the gas pedal and a poteniometer on the TB. Just more hassle to
contend with on your conversion. Camaros and Trans Amās use a cable.
In reply to a message from DYSmooth sent Sat 9 Dec 2006:
At worst you should be able to use some Firebird/Camaro parts to
rig it upā¦ Or if that is a no-go they do have setups specifically
designed for hot rod applications. So I donāt think itās a super
big issue.
You said āāwhoeverāā makes my harness. In case you didnāt catch it
earlier in the thread, there is an ECU/Harness available from GM
(straight from them Iām pretty sure) that is stand alone and
designed to go into older hotrods. It is setup to be put into an
old car and easily integrate with the more primitive instruments
and such without relying on other tidbits that might be needed to
use the Camaro/Firebird/GTO/Vette harness. That might be something
to look into if you havenāt got that part figured out yet.ā
Black On Black 1972 Jaguar XJ6 Powered by A Chevy 350
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Does anyone know of a Mustang List Group?
The reason I ask is that after 20 years, I am most likely getting back my
very first Arizona car that I bought and restored in 1982, then sold to a
young man who worked under my wings when I was chasing warrants. He, all
these years later has found me again and low and behold, his āwordā to me to
give me first dibs on the car, was held in his mind and heart in the most
highest form of integrity. He hunted me down, came to my home and told me
that he had many opportunities to sell the 67 late in the year Mustang Coupe. After I fought back the tear (just one manly man tear), he went on to show me pics, and give me a history, adding that he had the original paperwork that I had given him, even retaining the repair journal (Mr. Anal, remember) that I had kept back in the day. So, given a financial agreement that is fair to both of us, it looks like I am getting my baby back. Such a rush! He has done some serious work on it, changed out the rear axle for a late model Lincoln Versailles 9", disk brakes all around, and other suspension mods, including that youthful thing, (yuck) shackles. (They will go) The engine, some sort of modified 302 is leaking at the seals (it will go too). He has a 5-speed manual trans for it, but not sure if I am in the mood these days for shifting, but we will see. Inclination is to go to something modest, a driver with good mileage but a modest amount of power. Thinking of that 258 V-8 FI that the LTD's used with a 4-speed A/T. Anyhow, obvious excitement here, and I could go on about the original Concourse resto that I did on it back 25 years ago, and what he screwed up and then later made right, etc., but bottom line, a young man proved that all is not lost in the world and restored my faith in the fact that there is still some people that honor and cherish "a man's word, a handshake and life time friendship - even after almost a 20 year absence." SO WHERE DO I GO TO FIND A SUPER GROUP OF FOLKS, LIKE THE JAG FAMILY HERE, THAT I HAVE BEEN PROUD TO BE PART OF FOR OVER 12 YEARS? Smitty77 XJ-S 73 XJ6 & Fingers Crossed67 Mustang
In reply to a message from The Lumped Leaper sent Mon 11 Dec 2006:
Smitty, 'great story, 'brought a tear to my eye too. It was good to
hear of āa manās wordā in a world where I question most āgood
morningsā
Hereās a link to the Mustang Yahoo Group site: http://autos.groups.yahoo.com/group/classicmustang/
They advertise 1700 members I think it was. Iād think thereād
be a better site out there, for the hardcore type owner and maybe
youād find it there.
Itās great to have a car you enjoy, whatever it is and whatever
itās worth. Iāve a $800 Toyota that brings home the paycheck. Iād
be willing to drive it from Los Angeles to New York tonight. The
bodyās straight and the interior is pretty together. And like the
old song says: Brakes are good, 'tires fair. And a big plus is I
donāt think anybody wants to steal it. But I do get conversations
going at the gas stations and a couple of times Iāve had people
stop in at work and offer to buy it.
Hereās the test I give a car before I want it or buy it: Would I
buy it for twice the price. That will make or break the deal, in a
world where easily 99% of the cars are not worth 1/2 the going
price. And thatās the way I think. Good Luck getting a hold of the
Car.ā
Gary Boehm 76xj6 (400/400) 72xj6(p. car) 70xj6 (350/350)
lancaster,ca, United States
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