Simply T-5R, The Build Thread : A New Hope


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On 3/1/2021 at 1:19 PM, ChristiaanW200 said:

I was wondering if you have had some thoughts about the visco coupler. when do you intend on trying the "new" one? 

do you think there is a limit to the power they can handle? Or because of age they fail under load? 

 

 

I'll answer this from my perspective - I put 500AWHP through mine - it was the stock '00 coupler. They may hold more, I dunno. The freewheel mechanism is what failed first on the earlier ones I used (late 98-99). 

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On 3/1/2021 at 1:19 PM, ChristiaanW200 said:

I was wondering if you have had some thoughts about the visco coupler. when do you intend on trying the "new" one? 

do you think there is a limit to the power they can handle? Or because of age they fail under load? 

 

 

Like lookforjoe said the freewheel mechanism is what usually breaks, so if you plan on putting big HP through it I would weld it right off the bat.

I haven't had a chance to test my "new" VC which lookforjoe actually sold me...

For my situation I am absolutely in love with the locked 4WD setup I have now so I am not sure when I will try the VC.

My VC experience was very poor (probably cause the fluid dried up in mine) so I don't have much motivation to try the "new" one and potentially be disappointed again... but then again I could be blown away by a working one so who knows!

I will get around to it eventually.

Edited by Simply Volvo
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I started looking into some drag slicks. I found that M&H released a new size slick that has really peaked my interest.

https://www.mandhtires.com/M-H-Racemaster-Drag-Slicks?product_id=150

8.5/26.0-17 Drag Slick. Running this size would allow for the same amount of sidewall as a 8.5/24.5-15 setup. They are also the same weight. I definitely bet I could find some 17" wheels lighter than the volvo 15" alloy wheels I planned on using for slicks. Even better this will allow me to go with a bigger brake setup. Im highly considering a setup or something that I can fit under the titans.

Long term I can have 3 sets of wheels. Titans + street tires, 17s + DOT Radials (for street and roll race), 17s + 26" slicks (1/4 drag).

The car definitely seems to favor a higher ride height so 26s will be perfect and of course allow all of the benefits of always running a 17" wheel.

Edited by Simply Volvo
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On 3/4/2021 at 9:34 AM, Simply Volvo said:

Like lookforjoe said the freewheel mechanism is what usually breaks, so if you plan on putting big HP through it I would weld it right off the bat.

I haven't had a chance to test my "new" VC which lookforjoe actually sold me...

For my situation I am absolutely in love with the locked 4WD setup I have now so I am not sure when I will try the VC.

My VC experience was very poor (probably cause the fluid dried up in mine) so I don't have much motivation to try the "new" one and potentially be disappointed again... but then again I could be blown away by a working one so who knows!

I will get around to it eventually.

With the power you're putting down, the VC will lock very quickly - once I went over 350AWHP the torque split was 50/50

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On 3/5/2021 at 9:16 PM, lookforjoe said:

With the power you're putting down, the VC will lock very quickly - once I went over 350AWHP the torque split was 50/50

I had some extra time today so I removed my locked VC. Quickly got the new one installed.

It doesn't seem much different than my original. Just tipping into the throttle at 5K in 2nd I can easily get the fronts to break loose and go to limiter.

I did another 2nd gear pull and it went to limiter fairly quickly and then it almost felt as if torque was continually being added to the rear over a course of 2 seconds until I really felt it. It took all the way until the end of the pull for me to feel what I feel at the beginning of a pull with it locked 4WD.

I decided to do a launch test. Lit up the front and let out.

Lastly I tried doing a 3rd gear pull. No front traction loss but the car felt like it was on ice skates so I let out.

I think its working its just the reaction is so damn slow. Is my expectation of full lockup within a few hundred milliseconds too much?

The car is an entire different animal locked 4WD. You feel that rear pushing all the time. ZERO torque steer. Id never romp it around a corner but it goes fine around a tight onramp at 40-60mph... and the tiny bit of scrub pulling into my drive way I can deal with.

With this much power id honestly consider the VC to be more dangerous on a straight than locked 4WD. It has no predictability. You hit limiter and then the rear locks up when it wants to. Atleast with locked 4WD I know I will go dead nuts straight every time.

It sucks because the VC working like I had imagined it would, would be pretty awesome.

Going to get the car aligned with the VC and complete any other things that would make scrub annoying for a tech and go back to locked 4WD.

Im going to leave it in for a few more weeks. We are getting some half decent weather this week so maybe having things warmer will help.

Edited by Simply Volvo
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11 hours ago, lookforjoe said:

Sounds like you're better off with the locked coupler, based on your setup. Doesn't seem there is any reason to have the VC feature,  and sell the good VC on.

Yeah agreed. I think for some reason the VC isn't going to be very compatible with my setup and intentions.

Gonna leave it in another week or two maybe.

Glad I tried it honestly...

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I had a chance to weigh the car today. 3560lb (1620KG) with 12 gallons of E85. 3700lb when I stepped on the scale.

I weighed it FWD and it was 3300lb without me and 3450lb with me ( with 6 gallons )... so lets say 3350 with 12 gallons.

So about 200lb of added weight and insanely improved traction!!!! Seems like a win to me! The gain in traction should significantly out weigh the added weight. If the drivetrain can survive 800awhp highs 9s are possible at this weight.

This is full interior, full accessories, spare tire, jack, etc etc. Literally absolutely 0 weight reduction.

Really not that bad!! I want to put a 5 point roll bar in the car with seats and harnesses. This will allow me to run 10.00 or slower at offical NHRA events. Those front seats are so heavy my goal is to come out to about the same weight with the added roll bar.

IMG_0103.thumb.jpg.751041ee3f0d39e539aae018e1eb5596.jpg

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1620 is very nice. i've seen x70 awd with over 1700kg registered weight over here. 

in regards to the vc. i was also under the impression that the lock was faster. if i push the hard the vc seems alot tigher and less wheelspin. 

but for the occasional stop light sprint its still wheelspin al over. 

 

im very curious to how your first drags are gonna go. 

Edited by ChristiaanW200
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