In the thread about T34 dyno results I see a lot of engines going near or over 400 bhp. I was wondering how many people are still running the standard MT75 4x4 with anything bigger than a T3.

So how much power do you have in combination with what 4x4 gearbox?

 

only a handful have uprated boxes.

 

BOOM!!!!

 

my mate runs 400bhp on standard gearbox.hes hardly ever done a mental launch though .. never needed to when hes racing it lol and i know of another saff that ran 420bhp on a standard gearbox. it blew the box after 6 months of abuse . dont do launches on it and it should be ok both were t34 cars . if you have a t4 then id run good amount of boost to make up for the lag and run a quickshift with a uprated box[jack it into gears and rev it up for it to boost ] otherwise i think a t34 car would be slight quicker untill a long stretch.. its just my opinion

 

Was it your mate in the white Transit that blew you away at the lights on the ***OMITTED*** Road yesterday Mo, I saw ya lol.

 

launches arent the biggest problem. its "bang" and third is gone

 

T38 and standard on my saph and working fine, although I do have Quaiffe diffs

 

So is it only realy Third gear thats a weak spot On these then? Thanks

 

Wheres the pic for that? That was quality

 

Its not the amount of ponies that does the damage its the torque, anything more than 300 ft/lbs through a standard mt75 4x4 box and you're on borrowed time, saying that though it does have a lot to do with your driving style, watch the boost spikes particularly in 3rd gear


Luciano

 

are you the guy that owned a series 1 few years back?

 

3rd gear is in the middle of the shafts, so when the shafts flex apart, 3rd gear moves more than the rest as it has more leverage to do so.

1st is actually pretty strong, relatively unusual to break them doing launches unless you really keep doing it or are starting with a box already very worn.

 

this is mo we are talking about

even in his new reformed mode, im sure he likes to win in the 0-30mph challenge at EVERY set of lights in brum

 

I wasnt talking about Mo, in fact TBH I tend to largely ignore him if anything

 

 

Lol

 

Now that's quality....

 

As stated above Warren, I saw him and he was behaving so think he's reformed.

 

About 20 years ago I used to always be in my mates.

 

What's peoples opinion on this gearbox from "Gears"

It's all brand new and has the updated 3rd with shot peened super finished gearset and bara center vc

eBay item number. 170727632070

Sorry I can't direct link as using iPhone and I'm not sure how

 

Id like to know too as I was thinking of buying one

 

It looks nice, but I thought it was third gear AND second gear that used to fail, and not only third?

 

It depends on what turbo your using Ive blown standard boxes on T34's with big boost spikes , but also have used a standard box on a UT T38 as it doesnt make the same torque and power comes in smoother.

MK - The gears kit does look like a decent upgrade for a road car that does not want the noise of a straight cut kit, but it depends if it has been properly tested in a big powered car.
Mark get them hit up for a discount your car would be ideal as its a high profile build,going to be good power and will get used hard. Im sure they did Imsy a good deal on his straight cut kit for his fiesta as he used it on track and tested the kit.

 

its agood thing you didnt see me about 20 minutes before

 

tbh i did .. revved it and shot it off the lights popping and bangin . the gearbox didnt fail [YET] i think its because i have shit tyres so it spins up then grips in 2nd .it would fail i reckon if the tyres were grippy or at pod etc..its got a quaiffe atb diff btw i did it alot because i loved it popping loudly . but now i take it easy .. too dangerous mate

 

Another 3rd failure here.

Good stage 3 - around 340ft/lb.

I was told it was a new box when I got the car 10 years ago, and I've done about 30k since then. It managed a good few launches too

Can't moan

 

i run a t4 running 40+psi on a standard box for 10years + it whines a bit now but it has done bloody well considering i drag raced it for about 6years .

 

to be fair though andy, your car is pretty light!!

Ive murdered 2 boxes in 3 years, both 3rd gear after a torque spike!

 

iv ran a 2.2 bar and 390 ft/lb for about 3 years on standard box and it been fine so far

 

it is a lot lighter than a sapph around 1100kg,s & i usually drop a gear & rag the shit out of it rather than use the torque.

 

Pete mcrash who normaly comes on here(when he isnt perving on my wife on facebook) has a 400bhp 4x4 saff and he is on his original box.

 

Thats the one, fucking mint & so true

 

Full throttle at low revs with high boost spike will kill 3rd. Keep them high in revs while shifting and they will last a lot longer. Done a lot of drag race for the past 15 years and never broke a gearbox.

 

MSD380 conversion on mine, unsure of what power, on the "box killer" t34.48, enough for it to do 12.4 though at pod.
3 years of utter grief and full bore (6k+) launches and its still sweet as a nut, no diffs, no box, nothing
avoid 3rd gear roll ons and they last alot longer.

 

Im scared to drive Helens cos every time Im in it I expect to break the box

 

Thats just cause your a rough sod.

 

Nowt wrong with giving it to them rough now and then

 

What do you call low revs? Is doing 70 or 80 km/h in 3rd already high revs? 70 is about 3000 rpm... But I don't really understand what you mean by keeping it high in revs. Once you have the clutch up again it's at the revs it should be, and even if it's higher in the revs, the boost will still come in with quite a bang.