LS gearbox into a cerbera, 5or 6speed?
Discussion
brummiewedge said:
Can anyone tell me if the 6speed LS gearbox will fit in the tunnel?, if not the does the 5 speed go in, the engine i am fitting is a 6.3 that makes around 500bhp/lbs so standard Cerb box is a no go i assume.
t56 won't fit from what I am hearing if you want the engine all the way back - unless you can cut and shut the chassis around centre tunnel. T5 can hand up to this power but needs ALOT of work. Chap Sprints a Tuscan Racer clone with SBC (Small Block Chevy - Come on!)with 495 bhp on t5 but box has had all the bits reworked / shotpeened etc. T56 very heavy and ok if you can chop and want it right back, or ok if you (not fussed about having it far back!) mount it further forward (might have to as cannot change stick location on t56). TKO makes it easy and can be got in 500 and 600 ft/lb spce and has 4 stick locations. Std come in rear most location and you will most likley want the one 2nd from the fron position.
Jelly
Edited by jellison on Thursday 14th December 15:56
jellison said:
brummiewedge said:
Can anyone tell me if the 6speed LS gearbox will fit in the tunnel?, if not the does the 5 speed go in, the engine i am fitting is a 6.3 that makes around 500bhp/lbs so standard Cerb box is a no go i assume.
t56 won't fit from what I am hearing if you want the engine all the way back - unless you can cut and shut around centre tunnel. T5 can hand up to this power but need ALOT of work. Chap Strint a Tuscan clone with SBC with 495 bhp on t5 but box has had all bit reworked / shotpeened etc. t56 is you can chop and wantit right back, or ok as is if you mount forward (might have to as cannot change stick location on t56). TKO take it easy and can be got in 500 and 600 ft/lb spce and has 4 stick loactions.
Jelly
Any chance of a coherency re-edit Jon?
jellison said:
TKO take it easy and can be got in 500 and 600 ft/lb spce and has 4 stick loactions.
Jelly
Jelly
6 'stick' locations IIRC? But only the rear 2 are 'swapable' with the parts that come with the box, the front set(s) need a forward shift kit. TKO600 as the name suggests is built to handle 600ft/lb. Can't comment on space for box in a cerb chassis, but in the race Tuscan (which can't be too far off) even with the TKO box which is a bit of a monster it's not space for the 'box that's the limiting factor for getting the engine far back, it's the bellhousing and size of the motor in the 'V' part of the chassis. This assumes you're happy with the idea that you can only get the box/clutch out as a unit with the motor. With the Chevy motor I'm not sure you'd ever be able to get the box in or out with the motor in place.
The 6 speed does fit in the tunnel but there's not a lot of room left for exhaust clearance. Depending on how far back you want the ngine you will also need to modify the shft location. See the other thread here titled Remote Gear Selector -I explained what modification I'm doing to make it all fit.
I'm using the T56 because it's what I got with the engine but if starting from scratch with the hp you've got I'd definitly go with the TKO as Jon's suggested. If you want any more details or pics of a T56 in the chassis (Cerb) mine is swinging in it off a hoist right now!
Don
I'm using the T56 because it's what I got with the engine but if starting from scratch with the hp you've got I'd definitly go with the TKO as Jon's suggested. If you want any more details or pics of a T56 in the chassis (Cerb) mine is swinging in it off a hoist right now!
Don
OK guys, i'm trying to get some bits and bobs together as the guy i'm buying the engine off is shipping his new lump over v soon, this gives me the opportunity to get a TKO from the states while he's at it. Is there one particular box which is the one to have, i have access to a six speed clutch are they the same spline?
Paul, can I suggest having a look here
www.tremec.com/English/products/tremec.asp
You can see the ratios of the boxes there so you can compare... Would help to know things like the diff ratio of the Cerb, as you could end up with a car that tops out too soon due to being under geared possibly?
www.tremec.com/English/products/tremec.asp
You can see the ratios of the boxes there so you can compare... Would help to know things like the diff ratio of the Cerb, as you could end up with a car that tops out too soon due to being under geared possibly?
brummiewedge said:
OK guys, i'm trying to get some bits and bobs together as the guy i'm buying the engine off is shipping his new lump over v soon, this gives me the opportunity to get a TKO from the states while he's at it. Is there one particular box which is the one to have, i have access to a six speed clutch are they the same spline?
TKO's are ford or chevy,I don't know if the are different ratio options for the Chevy box(which is 26 spline and what you want)The ford has a very high first and to tall sixth any way,best speak to Jelly what he used.
Edited to add, bellhousing's are the key as mentioned on a previous thread for positioning an ls1 correctly in a TVR chassis,forget an old stlye bellhousing that has been adapted, they come out too square of the block and will foul the top rail where it starts vee'ing in,hence why I think a certain Tuscan with a old school SBC is sopposeibly set too far forward.The lower you can get it, the further back it goes(us a modified ls6 wing or ls2 sump,or drysump) untill the starter becomes a problem,then you can buy a mini high torque starter to sort that.
Edited by v8sag on Friday 15th December 06:23
v8sag said:
I think a certain Tuscan with a old school SBC is sopposeibly set too far forward....
not mine I hope...mine is as far back as it will go without cutting the top rails out the chassis
As to ratios, on the TKO600 there is only a choice of 5th gear - you get 0.82 or 0.64. Gears 1-4 are the same on all variants of the 600. So, unless you plan to do lots of top gear cruising at real low revs don't go for the 0.64 5th gear. Mine has the 0.82 top gear and all the ratios seem quite nicely spaced.
PS, just to add to a previous post where I said the TKO fits in the transmission tunnel with no real problems and it's the bellhousing and the back of the block that give the problems...that was forgetting you probably want exhaust pipes in the tunnel too. My exhaust has a side exit so there's nothing in the tunnel except the 'box. I still hold with my original thought though that even with exhausts I think that any problems will be at the bellhousing end and not the box.
Run the vorst forward and back under - have to have coustom header if not the whole thing but worth it.
I know V8sag has tubular headers the wrong way round i.e. piont forward swapped on the other head than intended for but think this is only practical in racer where you can mess with bonnet etc, Paul, please correct me if wrong.
Testing Z06 (C6!!) Tomorrow
I know V8sag has tubular headers the wrong way round i.e. piont forward swapped on the other head than intended for but think this is only practical in racer where you can mess with bonnet etc, Paul, please correct me if wrong.
Testing Z06 (C6!!) Tomorrow
Gassing Station | TVR Major Mods | Top of Page | What's New | My Stuff