Q78's on a Sierra

Post by **greg** » Fri Sep 05, 2003 3:08 pm

Hi All,

Basically I'm a sucker for upgrades and am currently considering changing up to a Q78 swamper. Just wondering if anyone else is running this size? (35.x" i think)

I've done a little bit of research about them - i expect they should flex as nicely as the 36x12.5 do (because they have one less ply in the sidewall according to the interco site).

I also know that i should be able to run them on the 6.5" beadlocks that i've got (the interco site says they require a 7", but it also says that my current tyres require a 7" too).

So basically my queries are:
1. Can i keep my headlight / firewall / bonnet and squeeze a 35" tyre under there without going spring over?
2. How big / tall is too big / tall for a swb sierra before it becomes overly massive and wants to spend all it's time lying down - or before it starts looking overly massive (like Jerry's Jeep from Top Truck last year)?

Thanks,
Greg

Post by **TuffRR** » Fri Sep 05, 2003 3:59 pm

I know a Sierra on 33's that spends all its time lying down. I assume you have at least the widetrack axles?

Post by **greg** » Fri Sep 05, 2003 4:02 pm

TuffRR wrote:I know a Sierra on 33's that spends all its time lying down. I assume you have at least the widetrack axles?

I presume that would belong to a certain Matt somebody?

Or perhaps someone else with a white softtop and yellow windscreen surround?

Yes, I have the w/t's - and i think my car's a bit lower than their's too

cheers

Post by **Liam** » Fri Sep 05, 2003 4:28 pm

I've got q78's on a sierra, but they're on danas with a spring over, CJ springs, body lift and i still had to cut the guards. unfotunately the car keeps donating bits of itself to science (r and d).

Post by **greg** » Fri Sep 05, 2003 4:40 pm

I had a good look at your car when it was down in Vic for the 4wd show thing earlier in the year - didn't realise the swampers were Q78's though...

I'm not too worried about the breakage factor with the axel setup - working on the theory that they will be "okay" since Mick is running a 36" tyre and only breaking things occaisionally...

Do you have any pics with your car stuffing a tyre up into the guard - i'm wondering about how much more room i'm going to need to make it fit in there.

thanks

Post by **Damo** » Fri Sep 05, 2003 4:43 pm

I'm thinking you're going to have to clear a bit more room under there Greg. How wide are Q78s again???

Post by **redzook** » Fri Sep 05, 2003 4:47 pm

get rid of the body lift an go
SPRING OVER :finger:

Post by **greg** » Fri Sep 05, 2003 4:48 pm

Damo wrote:I'm thinking you're going to have to clear a bit more room under there Greg. How wide are Q78s again???

The interco site says:

Tread Width is 9.5, Carcass Width is 10.8.

My current tyres are 8 and 9.5.

Post by **grimbo** » Fri Sep 05, 2003 4:53 pm

the fact you don't have any inner guards up front is good, you may have to remove the inner rears. You might want a little more lift maybe get some custom springs made similar to the Old Man Emu rears but with about 1" more lift. You will have to drop your bump stops.

The good thing about you doing this is it will let me know what I have to do when i go 37s

and sidewinders

Post by **greg** » Fri Sep 05, 2003 5:06 pm

grimbo wrote:when i go 37s and sidewinders

Newsflash - Grimbo throws a gauntlet for himself...

And exactly when will that be happening mate?

Dare i say that i will be putting bids on your widetrack CV's before anyone else does

Post by **greg** » Fri Sep 05, 2003 5:09 pm

redzook wrote:get rid of the body lift an go
SPRING OVER

Comon redzook - this is supposed to be tech talk - if you're going to be funny - get back into chit chat

Post by **redzook** » Fri Sep 05, 2003 5:12 pm

im givin you advice

Post by **greg** » Fri Sep 05, 2003 5:18 pm

redzook wrote:im givin you advice

I know mate - but if i wanted dodgey advice i'd just ask NAM via pm...

Post by **grimbo** » Fri Sep 05, 2003 5:19 pm

if I can sell the valiant and the HR for good prices and get a bit of sideline work confirmed and Brooke doesn't find out then I'm all sweet for the 37s and sidewinders

Post by **ljxtreem** » Fri Sep 05, 2003 5:19 pm

they will fit greg, you and i both know they will. :twisted:

no such thing as too big :twisted:

SPOA

LU

Post by **greg** » Fri Sep 05, 2003 5:22 pm

grimbo wrote:if I can sell the valiant and the HR for good prices and get a bit of sideline work confirmed and Brooke doesn't find out then I'm all sweet for the 37s and sidewinders

I understand - say no more say no more...

Post by **greg** » Fri Sep 05, 2003 5:23 pm

ljxtreem wrote:they will fit greg, you and i both know they will.

Hey Mock - i think it's time you did an introduction for yourself here rather than hiding with your little car in the background.

Post by **ljxtreem** » Fri Sep 05, 2003 5:24 pm

OH YES, come play with the big boys

Post by **ljxtreem** » Fri Sep 05, 2003 5:26 pm

i will, got to go out soon though, and i cant type fast.
I type like i drive,,,, slow...

Will soon though

Post by **grimbo** » Fri Sep 05, 2003 5:27 pm

It actually is a real goal I have for the Zuk. Just need to get a few other $$$$ out of the way first. But long term goals = 37s

Post by **TuffRR** » Fri Sep 05, 2003 5:27 pm

greg wrote:
TuffRR wrote:I know a Sierra on 33's that spends all its time lying down. I assume you have at least the widetrack axles?

I presume that would belong to a certain Matt somebody?

Thats the one! :shock:

Post by **ljxtreem** » Fri Sep 05, 2003 5:29 pm

u just want bigger ones than me!!

He he

Post by **greg** » Fri Sep 05, 2003 5:30 pm

grimbo wrote:It actually is a real goal I have for the Zuk. Just need to get a few other $$$$ out of the way first. But long term goals = 37s

I presume you would be running them completely outside the guards then? because otherwise that picture would suggest that the front will not be doing much tucking?

Post by **greg** » Fri Sep 05, 2003 5:32 pm

TuffRR wrote:
greg wrote:
TuffRR wrote:I know a Sierra on 33's that spends all its time lying down. I assume you have at least the widetrack axles?

I presume that would belong to a certain Matt somebody?

Thats the one!

Yes i've heard a few of his stories... but his car is quite tall, narrow and hard sprung with the big shackles on it...

Post by **grimbo** » Fri Sep 05, 2003 5:39 pm

greg wrote:
grimbo wrote:It actually is a real goal I have for the Zuk. Just need to get a few other $$$$ out of the way first. But long term goals = 37s

I presume you would be running them completely outside the guards then? because otherwise that picture would suggest that the front will not be doing much tucking?

Sort of the sidewinders are about 3" wider than w/ts and the axle wouldn't be as far forward

And Mick i thought you were going out

Post by **grimbo** » Fri Sep 05, 2003 5:41 pm

kinda like this do you mean

Post by **greg** » Fri Sep 05, 2003 5:44 pm

grimbo wrote:Sort of the sidewinders are about 3" wider than w/ts and the axle wouldn't be as far forward

I see - should be good...

But i'm still not thinking that the tyres are going to be out far enough - think you will need to narrow the grill and bonnet like the fancy rockcrawlers :cool:

Post by **greg** » Fri Sep 05, 2003 5:45 pm

grimbo wrote:kinda like this do you mean

kinda like that.

though it does look pretty wierd.

Post by **MQ080** » Fri Sep 05, 2003 6:26 pm

I put a set of Q78's on 6" with rims and they bagged out quite nicely...

they'll fit fine

Fri Sep 05, 2003 7:08 pm

they will fit easy as.

i got 37 boggers on mine with no body lift, sprung over with perfectly flat springs ( well the fronts actually have a bit of negative arch in them now

)

just cut it.

The biggest problem will be the footwell. I have my diff moved forward 4 inches and i still had to cut the firewall nearly back to the door on the outside edge tapering into the body mount (slight body mount massaging with a hammer is also required)

Just fit them so we can laugh at you breaking cv's driving it down your driveway

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