Small block/bog block gearboxes

[loggyboy]

Whats the Gen for mating a small block gear box to a big block engine?

[Adam*D]

I was told not to do it, just buy some big block conversion shafts

[Paul]

Loggy has had a XE for a few years, so he must have something up his sleeve lol. Unfortunately I know nothing about it, but it doesnt sound too easy.

http://www.pngclub.com/forum/showthread.php?t=100601&highlight=small+block+gearbox

[loggyboy]

It was more of a general query, nothing really up my sleave except for hoping to expand the posibillites for replacing my knackered f20.
Was also down to it being mentioned on a Kitcar site as to whether an RWD/XE gearbox would mate with a small block engine.

Im sure PhilGTE been a big block box on a c16xe., but thats the opposite way, so im sure its been done with non custom parts, just wanted to know what!

[t45_ste]

The bolt patterns are the same on the casing. A smaller fly would have to be used in order for the casing to clear. There would then be the starter issue? I think SBD stock a starter for smaller fly wheels.

EDIT: Just re read that. The casing must clear due to the bolt patterns being the same? May have to use a smaller fly due to the cluch size on the small block stuff. Less splines on the main shaft.

[craig green]

There was a lad on MIG with an F13 on his 2.0 8v Nova. He had no issues with it, you just need asmall block flywheel/clutch that will match the bolts on the crank of the engine you are using & fits within the F15/13 bell housing.

cue the onslaught of 'XE's will destroy a small block box' rants.

[loggyboy]

cue the onslaught of 'XE's will destroy a small block box' rants.

I think (or hope?) thats been exhausted on the thread that paul linked to.

[t45_ste]

How about a straight cut box:D

[loggyboy]

Not a chance... im saving for a kitcar.. and the whole car is still super budget, i refuse to spend more than i absolutely need to!

[Will F]

F16s are about £20-40
F20s are about £30 -£50

Thats cheap enough imo

[16v Nova Kev]

i fitted an F16 with no problems

[Paul]

i fitted an F16 with no problems

The f16 is a big block gear box, so you shouldnt have done, no.

[craig green]

The f16 is a big block gear box, so you shouldnt have done, no.

I'd let him off for his avatar though! lol

[DAN-F]

done mine today the f13 will bolt straight on, but the clutches are different so the plines on the shaft wont fit the 2 ltr clutch, you can use an NA diesel fly or the way i did it was i used the 1.6 flywheel and clutch, which is exactly the same size as the 2ltr but the bolt holes for the clutch are in a different place and the bolts that hold it to the crank are bigger on the 2l so i had to drill the 1.6 fly to take the 2 ltr bolts wasnt hard at all

[Adam]

You had to drill 2 extra holes in the flywheel then? :eek:
Screw that

[DAN-F]

no didnt have to drill extra holes, they both have 6 bolt holes but the 2 ltr has bigger (fatter) bolts so i had to drill out the existing holes in the 1.6 fly for the bolts to o through, ill get pics up now if it makes things easier

[Adam]

They dont both have 6 bolts.
2L 16v flys have 8 bolts, i have one here with me now...

[DAN-F]

well i have a pic of both here side by side both with 6 bolts

[Adam]

Must be a ecotec fly or something

[DAN-F]

it came off an early redtop out of an astra gte 16v but it has got 6 bolts, i took it off myself not 4 hours ago still got the skinned knuckle to prove it lol

[Adam]

Xe fly=
http://i12.ebayimg.com/03/i/001/02/67/7ccf_1.JPG

[DAN-F]

the xe one i took off is the one on the left next to a 1.6 fly on the right

http://i303.photobucket.com/albums/nn152/DAN-F/DSC01335.jpg

[Lee H]

That flywheel is off an 2.0 8v, 2.0 16v's have 8 bolts on the crank. Maybe your XE was an 8v bottom end with 16v head on.

[DAN-F]

who knows ive never really bothered messing with big blocks before, this is just how it came

[loggyboy]

F16s are about £20-40
F20s are about £30 -£50

Thats cheap enough imo

True, but the f13 i have in my garage is free! and the small block ATB I was offered was cheap.