Bundera conversion........... what would you do

[badger]

ok i have a 85 bundy. i wish to put a 1uz yota v8 into it. i have bought a h150 box from an 80 series as i wanted the strongest box i could get. problem is noone makes a bellhousing to suit.
it has been sugested to sell the h150 and buy a r151, but i plan to tubocharge the 1uz later on........ will the r151 handle the power of the ttv8?

also is the h150 rear output the same offset as my current diff. and is this the same as a 75 or 60 series diff

[Skip]

I wanted to do the same thing to my bundy but ended up settling with a 1JZGTE. I would switch over to an R series box, will it be strong enough? Well that depends on how you treat it! What do you want to do with the car? If it will be mainly used for driving around town id use the R154, I had an R151f and it was a major PITA to drive around with a powerful engine.

[slosh]

I doubt the r151/ 154 would handle the power. On this board ppl with r series boxs behind standard 1hz motors in current cruisers are reporting failures.
Do you have to go with 1uz? You could turbo an LS 1 or build a big cube ford or holden v8 for less money, and be able to use your h150 box.

[evanstaniland]

i plan on going commo V6 as it is easier and i believe sugnificantly cheaper!!

Evan..

[I.M.P.O.S.E]

If I did another one I would most likely go a 1J with single turbo conversion.

I find my R151 fine for the V6, besides a little notchy when cold. First gear is useless on road... fantastic offroad. I find I hardly use 2nd aswell. Will leave in 3rd gear no worries from standing start.

4th and 5th are about the same at speed above about 80-90 so most of the time its like driving a powerglide!

[ozrunner]

I would have thought a V8 Cruiser 4.7 bell would be a straight bolt up to a 1uz as it’s the same family and the Cruiser V8 uses the H150.

The R series is a very strong box and besides the various 4wd’s the R154 model comes in turbo Supra’s and they can make some big HP. Many guys use the 1uz with the R series as it’s a common swap. Dellows do bellhousings but as you have a H150 I would look at the Cruiser bell scenario.

I have nothing against the 1UZ as they are a nice engine but they do lack low down grunt. But a huffer would resolve that . I can readily understand why a lot of guys now use them in swaps as they are obviously way better than the asmatic stock engines and relatively cheap. But they are not all beer and skittles and like most swaps there are issues to consider.

It can be a lottery whether you get a good one, overheating can be a problem due to their size etc and general parts availability and cost etc versus the other normal engines we know of are some you should also consider, besides hoping you don’t do a starter motor in the bush, .

I.M.P.O.S.E

The R151 has a 4.31 1st gear so you could swap in a R150 (V6 4Runner/some Surfs) as it has a 3.83 1st gear and maybe more useful. Also as far as your overdrive goes find a Dyna R452 and swap the overdrive gears and you will get a 30% overdrive versus the current 17%. My R154 has a 3.25 1st and it normally has a 25% overdrive but mines 37%, but they have a 30mm longer input shaft.

[Skip]

I agree with IMPOSE, when I had my 1J Bundy 1st gear was useless on road with the R151, it would neraly result in a wheel stand everytime i took off If I had my time again id most probably use the R154, or maybe consider the R150, but def. not R151f.

[BundyMonkey]

http://www.offroadexpress.co.nz/modules ... c&start=15

I am about to start the 1UZ into a Bundy and will be using the R151 box

[I.M.P.O.S.E]

I.M.P.O.S.E

The R151 has a 4.31 1st gear so you could swap in a R150 (V6 4Runner/some Surfs) as it has a 3.83 1st gear and maybe more useful. Also as far as your overdrive goes find a Dyna R452 and swap the overdrive gears and you will get a 30% overdrive versus the current 17%. My R154 has a 3.25 1st and it normally has a 25% overdrive but mines 37%, but they have a 30mm longer input shaft.

Thanks for those tips ozrunner. If I do ever happen to pull the box apart I may consider this. I dont mind 1st gear being that low as its good offroad which I own it for, however does do a bit of town work too. As for the overdrive though that would be better for me, but I can live with it for now anyway. Still cruises on the highway comforably at 110+

Skip I could only imagine what yours was like in first gear with the 1J... People give me the funnist look when I do use first, that look of 'what the... 4WDs shouldnt be able to do that!'

[badger]

i must say im a bit worried with the strength of the r series box's once i tt the 1uz
anyone got experiance with big power thru rseries box's

[smithie]

I have an R151F factory fitted behind my 1990 PZJ70 Swb. The 1PZ 5 cyl diesel doesnt have bucket loads of power, but being a deisel its got good torque..plus i'm running 35's and 4.56 diffs.

I cant say its done too badly after 320kms but i have lost 5th gear.
In saying that I did lose it about 4 months ago and have been driving it daily and 4wheelin for the last 4 months with no other drama's aside from a bit of gear backlash.

i'm gonna change mine out to a H15x, which if i was you would be a better option.

Maybe contact castlemaine rod shop (yellow pages) and see if they can make a bellhousing for you. they do a heap of custom stuff etc for hotrods and a lot of engine conversions.

all the best.
dan

[ozrunner]

i must say im a bit worried with the strength of the r series box's once i tt the 1uz
anyone got experiance with big power thru rseries box's

Its not an issue as the R series will easily handle a 1UZ.

My Cobra 4Runner has way more grunt than a 1UZ and I've been using an R series for the past 6 years and it was used when I brought it and its still perfect

[badger]

so a twin turbod 1uz with 400kw and as 500 newtons of tourque wont break it?

and yes i do drive hard very hard

im not argueing i just want to make sure as if it breaks after ive spent 3k on adaptor bits and tail shefts etc i will cry like a lil girl:P

[ozrunner]

My bad. I missed the turbo scenario .

Some of the twin turbo Supras using the R series put out some similar serious if not more HP etc, but that is for road conditions, so in your case a stronger box might be good insurance.

[Skip]

For what reason do you want to twin turbo it and have a 400kW Bundera?

I had a 300kW, 520 Nm Bundera and in the end it wasn't the best idea, lots of power and poor stability arent much of a combo. I wish I would have used a surf, If so I probably would still own it.

[badger]

i wanna compete in it
i already have 80 series diffs to put in it (am considering going back to 60's tho) and already have engineering aproval to cut it into an extra cab and extend the wheel base just gotta sorta out what box etc im gunna use to i can start getting the chassis set up

[gotoy]

For competing the R151 gearbox is not strong enough. For 4x4 its ok. Go for the next strength up, R154.

There's a stronger R151 made by one company, Snake Racing I think.

[Skip]

What sort of events do you want to compete in?

[ozrunner]

For competing the R151 gearbox is not strong enough. For 4x4 its ok. Go for the next strength up, R154.

There's a stronger R151 made by one company, Snake Racing I think.

It is not stronger. They are both R series and the only major difference is their gear ratio's, ie R150,R151,R154,R452 are all the same just different gear ratios.

The "Marks HD" is only R series internals in a cast Dyna casing (R452). The whole gearset can be transferred into a normal R series alloy casing if you wish etc.

[badger]

thats what u was thinking ozrunner

the only stronger yota box's are the h series ?

[gotoy]

I stand correct!!

The R151 is not really suitable for competition. The one to use is the 'H' series.

[ozrunner]

thats what u was thinking ozrunner..

Lost me there . My initial response was the R series is more than strong enough for a N/A 1UZ etc but missed that you are proposing to add twin turbo's for 4wd competition, so yes they could be marginal given the likely torque and Hp increase. Therefore, given the costs etc and the need to only do this once it would be wise to err on the side of caution.

There was an article on massivley modifed engines in Cruisers (I think they were supercharged) that a company made for the Arabs that put out ludicrous numbers for their desert racing etc. Can't recall whether they were manuals but I seem to think they uses beefed up auto's.

I confess I know nothing about the H150 strengths or weaknessess, if any .

There are many other strong boxes around but the issue is not all can be easily mated to a transfer etc, let alone a 1UZ. The H150 with a factory V8 bell would by far be the simplest. I would be making some enquiries with accredited Toy trans shops etc as to its overall capabilities, however I would suspect it would be more than adequate.

[gotoy]

I just called a friend of mine who drives a toyota for competitions.

Formaly he used a R151 on a 1KZ and found that r151 was not strong enough. He then upgraded to a Lexus V8 and mated a h150 gearbox on.

[badger]

go toy u dont happen to kno where your mate got the h150 adaptor from........ i have contacted all of the usual suspects and none of them make one

ps the car your talking about isnt that lux duelcab with the blue bar work and bundy front end is it?


badger wrote:
thats what u was thinking ozrunner..

Lost me there
it was in reference to the r154 being no stronger just having different (less 4wd friendly) ratios to the r150 or r151
i beleive the marks dyna box is slightly stronger but the main gain is the even lower 1st gear. wich i think would be too low with a 1uz

[ozrunner]

.....it was in reference to the r154 being no stronger just having different (less 4wd friendly) ratios to the r150 or r151
i beleive the marks dyna box is slightly stronger but the main gain is the even lower 1st gear. wich i think would be too low with a 1uz

Aaagh gotcha.

The Marks "HD" box is a misnomer. The only stronger area is the heavy cast casing versus the normal alloy casing so yep if you wack rocks it might be stronger, but thats it.

It is an R series out of a Dyna truck and has a 5.14 first, hence its suitability for slow 4wd use etc. It also uses a side shift gear selector set up that can be very sloppy and indirect versus the internal selector shafts in the normal R series.

Their whole setup can be transferred into a normal R150/151 alloy case using the normal R150/151 shaft selectors etc as there are no differences in bearings etc etc. The difference is the shift select mechanism and the cast casing, nothing else.