Hard one to call to be honest, with the weight saving it will make a difference.

Until i try some i really cannot answer that, but how much do the guys use at worksop you have lent lipo packs to, if you add a bit for a higher rolling resistance you would not be far off.

Is a 3200 lipo directly the same as a 3200 nimh, as i hear guys running for 20 minutes on the 4800 lipos ? never do that with a nimh.

But if the duration is there then a 23mm tall 3200 saddle lipo would be spot on, also cheaper with the smaller cells :woot: i guess it would be more a racers pack than a bashers pack.

Mark, for me with lipos it's "as much as you can get" in a "drop in size"

f.e. maxamps offers 4000 mAh saddle 2s2p in 21mm height (probably just
shrunk in)

Well, I finished 3rd in 4wd last time, and when I 'topped up' my cells a week later for vintage racing I was putting in ~2000mAh ;)

G

Northy is correct. When I raced at Newbury (indoor with jumps) I could do 3 x 5min runs with a 5500mah Maxamps saddle pack in my B44 and a 6.5 Novak motor.

Lipo's have lower internal resistance and is more efficient so you'll get better run times with lipo's as apposed to NIMHs. Also, don't forget the power delivery of a lipo is directly related to it's capacity so you can't go too small with a lipo's capacity.

Into a lipo ?, if so what capacity were they.

So i guess a 3200 lipo is like a 4000 nimh ?

Frogger yes we have been there before lol.

Indoors with a 5.5 in a XX4 I was taking about ~2000mah out of the one you have lent me Mark. I did manage two runs on one charge.

cheers
im speaking to trakpower monday so i will ask the question re 3200

A bit late unfortunately, but here are my 2 cents:

On a very grippy track I use 2300 mah on my X10 + Mamba 5700.

No more than 2000 on a dirt track.

So the 3200 will be more than needed as far as I'm concerned.

one problem I see is that with reduced capacity the current discharge ratings
will be reduced:

from 96 Amps to 64 Amps - is that enough for a 5.5 turn X11 in a 4WD buggy?

thats the problem, you then draw more out the pack

trakpower are trying to get a member of staff to worksop this sunday, where they will be bringing a saddle pack and 3200 stick pack up
you will be able to try these in your cars, and ask questions etc, unfortunatly you can not have them as there mine :thumbsup:

if there is enough call for 3200, i was told today it is a good possability it can happen, so like i said if there is a call let then know, worksop indoors in 4x4 i was taking approx 1500 to 2000 with a sintered 6.5, ill check the capacity and note it this weekend

cough '' free sample '' cough cough ;)

er ..........................bally will be getting some :thumbsup: have a chat with him :D

ok i got some saddle packs today at worksop, hand delivered from stanstead ( cheers trakpower)
also the new 3200

tried the saddles in

losi xx4? think it was, reguire small bit of work
associated b44 longer body posts
HB D4 raise top deck 2mm and longer body posts
X5 remove one lug and longer posts i think
yokomo file two small cutouts in rear top deck, longer body posts

this was the 4800 saddle

the new lipo only charger is awsome, 5 amp charge rate, small compact and light

think those who saw them were very impressed.

Awesome. That hopefully means I will get mine delivered sometime soon :)

they could be in the uk in the next two weeks or so

These saddle Lipos are awesome looking items for any car which stick won't fit (all but the Aero & Serpent I suspect), and if they're anything like the stick packs for performance - they come damn high in my recommendations.

pics ??????

Hi Mark,

could you take measurements of the packs?

is it possible to get a 25C 3200mAh saddle?

thanks alot!

Im sure Mark will confirm, but as I understand it the current Trakpowers in circulation are 20C and anything from now onwards will be 25C...

i.e. INSANE :thumbsup:

the 4900 stick has been 25c for a couple of months, it was simply a running change in production, as the packs got better those nice trakpoer people simply upgraded the cells and kept the cost the same.

the saddles are 20c, and im not sure if they are going 25c or not, the 3200 would be the same rating as its the same cells minus one 2x 1600 = 3200 as aposed to 3 x 1600 = 4800
i will assure you that 20 c is plenty in off road, and chris a tom have been using my 20c packs, tom with that and a new car just came second in the A at worksop, and im sure he and Chris will say they have plenty of power

ill contact trakpower to find out

Mark

Mark, I really appreciate what you're doing!

Do you know the height of the 3200 mAh saddle pack?
(was your test-pack boxed?)

Again thanks!

I would usually use 5.5L and Nimh in 2wd, but I am using 7.5R and 20C Lipo now and its faster too.

no problem
the 3200 is not as yet a confirmed product, its being loked at by trakpower as a possiblility, but in sure Mr trakpower got the message on sunday that its somthing racers want.
if it was released it would be the same height as the 3200 stick which i think is around 21mm tall

jusr remeber a 3200 pack will have less constant amperage output that a 4800
20c x 4800 is 96 amps
20c x 3200 is 64 amps so they may feel softer

my original 3200 saddle are now in a stick format (where the idea came from)
may be tempeted to open em up and remake the saddle to do some more testing

at worksop the most i drew in 4 wheel drive was 1200mah on a 6.5 sintered motor in 5 mins

for finals you and tom may use my 25c packs if you like ;)

Ha ha. Honestly, 20C and 7.5R is as fast as I need - any faster and I am slower over a lap.

no not at the moment.

Finally the 3200 and 5400 are available i am thinking about getting 2-3 of the 3200 as they now will fit in the S400.


luke

Not sure I understand, are Lipo's now approved for racing in UK? The swedish debate hasn't even started as far as I know. Regarding these amp rates at the packs, would the lower 3200(?) be better? Does it make any difference more than longer chargetime?

Magnus
Lipo is still being "tested" (if you like) in the UK, we can use it at club level if the club allows and in the garden, at BRCA sanctioned events only batteries on the list (mostly Nimh), there is some sanctioned use in touring car, we (some) are expecting a rule change for 2009 that will allow use in buggys at National & Regional level.
There is a lot of interest and debate.

3200's will be smaller (they may be saddle packs) so a direct replacement for 6 C cells without modification to battery trays/posts etc (remember some may want to use NiMh when at Nationals but switch to lipo at club). Charging rates are much the same as existing batteries charged at 1C, 3200 would charge at 3.2 Amps max, 5.2's at 5.2 Amps. The larger packs may be capable of greater output (more punch?), this is shown as 20C or 25C with 30C burst. Run times are not an issue.
Hope this is helpful

Thanks now I follow:)

I got my 3200 today and with no mods done to my B4 i can get a sheet of lead under it to bring it to the same weight as a GP3700:thumbsup: