[sker66]

Tom........What was the cost of the trans mod?



If you did it yourself where can we buy the custom gear and what is the procedure and special tools it requires?



Foe everyones info.......Theres a member on the Porsche hybrids website that has just installed a intercooled magnacharger on his LS1 944 conversion. He's also a savi racer like Tom and will be posting some results soon.........sounds like fun to me.............. <img src="/forum/images/smilies/968/biggrin.gif" class="smilie" alt="" /> ........Geno

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[badberry68]

Tom,



Thumbs up on the 6th gear install..I am hoping to do this and the LSD all in one shot. What is your basic spring rate setup?

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[968LS1]

Flash-I got my engine weight when I placed the engine on a freight scale 3 years ago, it weighted just a little under 400lbs without manifolds. What does a 3.0 dressed weigh?



When I did the trans modification I also replaced 1st,2nd,3rd and 4th gear syncros and all the trans seals ($410.79). The gear set was $300.00 and I a friend Carl Spiller who is a Porsche tech do the labor (300.00). The bummer is that you have to almost completely dissemble the tranny to press the 5th and 6th gears off the pinion shaft. I have a contact in Texas who can get the gears out of Europe; PM me for contact info.



My spring set up is 450F and 550R with Moton Club Sports-No torsion bars.



I went to the lake this weekend in the 968 and it sure was nice cruising 2350rpm @ 80mph and the mileage was 25mpg!

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[flash]

i believe the 379 is dressed but dry, as indicated in the manual - although heavier than them, that would be in line (pardon the pun) with other 4 cylinders, given the increased size and porsche "added bulk" factors, since a typical aluminum 2 liter 4 cyl is about 250lbs give or take



that would make the chevy about 100# heavier when all bolted in, which makes sense - still impressive though, given the bare weights of its predecessors



a quick trip to the scales would verify that though

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[968LS1]

I can assure you and anyone else reading this post that the LS1 is not 100 lbs heavier than the pcar 4 cylinder. I have built several of these cars for track use and they are not front heavy as you would like to think. I will put my car on the scales and put an end to this topic.

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[flash]

that would be great - a measurement showing front to rear weights would be very helpful - besides, given the oddly front biased spring rates you indicated, it might help you too

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[jim7]

I appreciate all the advice on this board and wish I was a further along with the project. However on Friday I got the last derelict out of the garage and the lift is going in this week. I've just about got all the bits and pieces together to fit the engine. Once I actually get it running I'll look at the springs, but it makes sense that it is going need stiffer springs to handle the torque.

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[mark_cathy]

Hi, really enjoyed the post. Also like the wheels on the original car pictured. Can anyone inform me of the wheel type, size including offset, and if they fit trouble free.

Also, what tyres does this run (sizes)?

Tks

Mark

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[bob blackwell]

They are Kinesis wheels. I used to have them on my 968 in the 7 and 1/2 inch x 17 and 9 x 17 sizes. Offsets were the same as the OEM Porsche wheels and they fit just fine with no spacers or anything special needed. I think the Model of the wheel is K57. Good luck, Bob Blackwell.

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[ether_joe]

this is so cool guys. This will be my power mod when the time is right. Assuming I can get a referee or whatever it is to ok the car for Cali emissions.

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[968LS1]

Bob is right the wheels are Kinesis K58; sizes are Front-9-1/2x18 Rear are 11x18 tires are 265/35/18 and 295/30/18. The 9-1/2 will only fit if you have a coil over with a 2-1/2 spring. The fit is tight but I do not have any rubbing.



Tom

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[Jason Judd]

besides, given the oddly front biased spring rates you indicated...

__________________



Flash,



I don't understand your comment. Most of us, with full coil-overs, run about 100 lbs difference front to rear. My car is 650# front and 750# rear.



Jason

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[flash]

it's the relative percentage thing, not just 100 lbs difference



let's do some math



with 160lbs up front at 94% effective, and 175lbs in the rear, you end up with 150 and 175, or an 85% balance



maintaining that balance, and also presuming torsion bar delete and no front to rear weight change



with a 650# front spring, the rear should be 764 wheel rate - since the rear wheel rate is a much lower relative percentage (paragon states it at 56%) the rear spring should then be 1283



with a 450 up front the rear should then be 888



if the weight changes front to rear, then the spring rates should adjust accordingly, based on the percentage of shift (subtract 175# from the rear rate if the torsion bars are still in there and unchanged)



i have 300 up front and 500 in the rear, and i could probably really stand to go up to 600 for track to maintain the balance, but i am light in the rear, so i think it might be more like 550 or 525



i know it sounds high, but that's how the math works out, and my car has been showing the math to be pretty darned close

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[sker66]

Tom........I really think you need to give Flash a ride in your car to prove out the weight differential ?.................. <img src="/forum/images/smilies/968/biggrin.gif" class="smilie" alt="" />

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[flash]

lol - i think i'll have a set of scales pretty soon and we can see what the weights are, but i'd love a ride -



i'm not knocking the concept, and don't want to be misunderstood - obviously it works - i am only saying that it isn't plug and play if you want the car set up right - i've been dealing with things like adjusting springs rates just to handle the weight changes and torque of the setup i have now, and getting rid of the rubber suspension bushings to get rid of the torque steer and twitch under high g loads - for example, i now have to change my motor mounts to a different and stronger type because i am about to toss the engine through the hood when i romp it - a V8 only exacerbates that - i've done quite a few V8 swaps, including one that was actually lighter than the 4cyl that was in the car, and there are a lot of things that come into play that aren't obvious until you get in there



properly executed, i like the idea, and think the car would be a lot of fun to romp around

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[sker66]

For you guys who are really interested check out this forum. These are a bunch of very savy gearheads mostly who have coverted there cars. Can be challenging and does take a bit of commitment and cash but when you drive one of these cars nicely done it is pretty impressive and i guarantee the smile will be much bigger on your puss than you'll get with a NA 968. Look of the recent thread on Michaels car..................................Magnacharged 944 LS1



Check out this vid............... enjoy http://www.youtube.com/watch?v=DUu_DlJfMTY









http://www.porschehybrids.com/











Hers another of Michaels car before he put the magnacharger on.



His next planned mod is a kevlar blanket to wrap around the transaxle to catch all the bits and pieces to make clean up on the road easier.............. <img src="/forum/images/smilies/968/laugh.gif" class="smilie" alt="" />







http://www.youtube.com/watch?v=_dsPe40C__A...ted&search=

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[badberry68]

Well, my dentist recommended 500F and 550R.

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[flash]

with or without torsion bars? i presume with, because without them that car should be a mess



if you are having issues with bumps, then you need different shocks - i just went through that - the shocks i had could not handle the springs i needed to run

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[968LS1]

All this crap about spring rates and weight bias. I have track tested my set up as well as my brothers and guess what it works very well, just ask some of the guys with Cupcars that ran Watkins Glenn this week and were left behind by a LS1 V8 944T. The set up we have works reguardless of what the Flash math says. The theory of the math is correct but the reality is in track testing. I know several PCA 944 and 968 racers that use the so called (front Bias set ups) and they are the guys who run up front. They still retain the torsion bars in the rear but turn them down to about 10mm so they have very little rate but meet the PCA rules. These guys will run 750-850 up front and 650-775 in the rear depending on their personal preference. If you set your car up and don't get it on a racetrack and consistantly take it to the limit, or put it on a skid pad to dial in the balance you have no real way to know what works and what you think might work. If your testing is done on the street how can you really know if it is working better without compairing your lap time. I have a DE next weekend and I will post my cars weight split, not that it really matters to me, because I have done several V8 swaps and I know my car and others I have done are not front and handle excellent. Of course I am only speaking from hands on experience with V8 coupe cars, I have no experience with cabrolets so Flach your car is certianly different in its handling and setup characteristics.

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[flash]

maybe you're just a better driver than you think you are - i still think that the car would run faster if set up like every other car



by the way, i do test it on the track

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