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-   Porsche Engine Conversion Tech Forum (http://forums.pelicanparts.com/porsche-engine-conversion-tech-forum/)
-   -   the start of my LS1 conversion: (http://forums.pelicanparts.com/porsche-engine-conversion-tech-forum/508893-start-my-ls1-conversion.html)

Tim K 08-02-2010 10:21 AM

Is there a cost effective (and non intrusive) way to incorporate improved anti squat geometry in the rear suspension (a la 930)? 930 control arms are expensive and the Smart Racing control arm pivot boxes (I believe) require the rear seat area to be hacked up. IMHO, stiffer springs are in order anyway with your heavier engine, but if you can take advantage of anti squat geometry then you won't need to compromise with an overly stiff ride.

my two cents

Keep up the great work!

Tim K

Rebel911 08-02-2010 12:57 PM

while the observation is interesting, my LS1 weighed in over 50 lighter than the old flat six (stripped LS1 in my car is 425#). A fully dressed LS engine is 34 pounds lighter than the flat six.

LS - 450#
flat 6 - 488#

When I look at the car the wheel gap looks right; not too squaty.

My back seats are stripped however I had the cage/bracing set up so I can plug and play rear coilovers. I don't plan on putting in old tech if I want to maximize output. I do what to keep some of the old look.

Tim K 08-02-2010 07:11 PM

Quote:

Originally Posted by Rebel911 (Post 5486006)
while the observation is interesting, my LS1 weighed in over 50 lighter than the old flat six (stripped LS1 in my car is 425#). A fully dressed LS engine is 34 pounds lighter than the flat six.

LS - 450#
flat 6 - 488#

...

Interesting. However, my point was more about not having to compromise ride comfort to limit squat. What kind of low-end torque do you get with an LS1 engine?

Tim K

Rebel911 08-04-2010 03:00 PM

I am not going to put out numbers till I have dyno sheets to prove the information.
i already have a certified weight for the car.

If I post estimates there will be may too may non-believers.

As for ride comfort, that's why I have a X5.

as soon as i fit up a coil over set put we will see how it goes. That will be a winter project.

David Borden 08-04-2010 07:44 PM

Quote:

Originally Posted by Tim K (Post 5486602)
Interesting. However, my point was more about not having to compromise ride comfort to limit squat. What kind of low-end torque do you get with an LS1 engine?

Tim K

IF the issue of squat is torque of the V8... changing the timing curve can cure that... but why? Torque rules :D

David

aigel 08-04-2010 09:02 PM

Looks great - I like the fact you painted in yourself and in matte black.

I think the car needs to come down an inch in the front an 3/4 of an inch in the back. It may also be time to sell the Fuchs and get an aftermarket wheel that's at least 17".

George

Tim K 08-04-2010 09:05 PM

Torque is a wonderful thing but we try and manage the negative side effects :).

Squat is a function of weight transfer (result of wheel torque) and suspension geometry. Generally speaking, squat will increase with wheel torque unless you adjust suspension geometry or move to stiffer springs.

Now back to the build!

Tim K

Rebel911 08-06-2010 01:38 PM

with the wing on. This weekend I am painting the inside and jams. any red on the outside is either being covered by trim or on the plastic from the last spray job. It will be gone this weekend.
wind shield, lights, bumpers are also planned. I want to get it inspected next week.

http://i690.photobucket.com/albums/v...g?t=1281130575


http://i690.photobucket.com/albums/v...g?t=1281130580

http://i690.photobucket.com/albums/v...g?t=1281130588

http://i690.photobucket.com/albums/v...g?t=1281130593

Ken911 08-06-2010 01:53 PM

Quote:

Originally Posted by Jgordon (Post 4995878)
When someone says V8 around here, people typically react a little more harshly than if you'd peed on their shoes and slapped their wives.

Looks like a cool project.

With your skill at bodywork, I hope you didn't start with a pristine turbo.

wouldnt have bothered me much if it had been a regular 911 but hard to see a turbo cut up unless it was already a salvage.

Rebel911 08-06-2010 02:05 PM

Quote:

Originally Posted by Ken911 (Post 5493446)
wouldnt have bothered me much if it had been a regular 911 but hard to see a turbo cut up unless it was already a salvage.

It was not a perfect turbo.

Ken911 08-06-2010 02:08 PM

Thats good. mine was a salvage when i turned it into a slant nose even then. i felt bad once i found out they only made about 120 turbo targas total.

Rotornut1 09-20-2010 08:14 PM

EFI intake
 
I've been watching with great interest over the last few months the progress some of you guys are making. I'm finishing up the bodywork on my '74 coupe and then will be ready to do my LS2 conversion. I'm going with RH and a front radiator.
I had to take a break from a long summer of sanding to at least trial fit my engine and I wanted to share the success I've had with my choice of intake. I've got the Edelbrock pro flow XT EFI manifold on my LS2 ( part #71403). It easily clears the oil pressure boss so no need for modification there. I've also got the original 90mm throttle body and am using Specter Performance's elbow ( Part #9781). I'm very happy with this setup, not even close with any clearance (of course I'm running a rear spoiler as the manifold sticks out of the lid)
Time to take the motor back out and finish sanding the body (that's why everything in my pictures are covered with dust) Will have paint soon then can finish my mechanicals.
I want to thank shanghai_todd, mbaran, Rebel911, mkingham, and bunch of other guys on this forum who have helped me plan this project. I'll start my own thread when I have a little more to offer. Thanks againhttp://forums.pelicanparts.com/uploa...1285042421.jpg
http://forums.pelicanparts.com/uploa...1285042433.jpg
http://forums.pelicanparts.com/uploa...1285042449.jpg

Jim2 09-20-2010 08:47 PM

Those 15s gotta go man.

http://i690.photobucket.com/albums/v...g?t=1281130580

Rebel911 10-03-2010 02:13 PM

the 15's are going this winter.

I like Rotornut1's build looks clean.

Well, lets play name that noise... any ideas?
I have 50 psi of oil pressure at ideal and good rising pressure when accelerating.
Engine is cool to warm as I only drove it ~200 yards to record the sound.

http://www.youtube.com/watch?v=RMLyinXhW6U

Forgot pics of the car now and the new pan. The rear window is going for dark tint tomorrow.

http://i690.photobucket.com/albums/v...g?t=1286143455

http://i690.photobucket.com/albums/v...g?t=1286143462

http://i690.photobucket.com/albums/v...g?t=1286143465

http://i690.photobucket.com/albums/v...g?t=1286143470



Old pan

http://i690.photobucket.com/albums/v...g?t=1286143366

New pan

http://i690.photobucket.com/albums/v...g?t=1286143435

http://i690.photobucket.com/albums/v...g?t=1286143441

http://i690.photobucket.com/albums/v...g?t=1286143545

shanghai_todd 10-03-2010 05:24 PM

sounds like a lose rod.

Rebel911 10-03-2010 05:57 PM

Or flywheel bolt... balls

Jim2 10-03-2010 06:19 PM

You might cut the oil filter apart and look for desbris as signs of a rod bearing being chewed up.

Is there anything hitting/rubbing the chassis which you overlooked?

shanghai_todd 10-04-2010 07:01 AM

Second thought: Is there a baffle or something different about that oil pan that could be mis-aligned or flipped up that is hitting the rod?

I would remove the pan and start checking for a scared area or lose rod.

Rebel911 10-04-2010 10:33 AM

Quote:

Originally Posted by shanghai_todd (Post 5596080)
Second thought: Is there a baffle or something different about that oil pan that could be mis-aligned or flipped up that is hitting the rod?

I would remove the pan and start checking for a scared area or lose rod.

good call. I will check tonight. the windage tray is brand new but maybe it was bent.

I am going to 1st short each coil, one at a time, to check to see if it is rod knock. Next I am pulling the valve cover and oil pan to check for cover wear. Last I am going to pull the engine to check the flywheel bolts.

nice!
good thing my wife is going to a retreat with her sister this weekend.

nineball 10-04-2010 10:48 AM

i just saw a 944 with an ls1 this weekend at a DE. he said it had not hit the dyno as he had just finished a week ago or so but his estimation was 400hp/400ftlb. poor guy has clutch problems and could not go out on sunday but we had been sharing the same instructor who said it was like being belted to a rocket.


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