Gearbox for 280 conversion

[Gt Lad]

Hi Guys,
What we talking regarding gearbox for 280/300 conversion.
All it is.. I’m doing clutch/flywheel and upgrading ready for conversion but I’m also looking at a Quaife LSD but I’m thinking gearbox now and is it a waste if I need to change-Thanks in advance
(182)

 

[bloke]

Sticking with a jc5 box?

 

[197 turbo sprinter]

Hi Guys,
What we talking regarding gearbox for 280/300 conversion.
All it is.. I’m doing clutch/flywheel and upgrading ready for conversion but I’m also looking at a Quaife LSD but I’m thinking gearbox now and is it a waste if I need to change-Thanks in advance
(182)

I 1st used clio 197 gearbox when I did a r26 conversion. I found if you revved it out to 6800 rpm you only dropped down to 5300 so no rev range to play with . It felt stupidly quick but in reality you spent as much time changing gear as in gear. I compete in hillclimbs and found megane box much longer ratios felt slow but is quicker . My advise use a dci box

 

[Gt Lad]

Sticking with a jc5 box?

Well I read that the standard gear box would be ok but ate there any real tested options? All I’m saying is I want to do it once if you know what I mean. If a standard box (maybe rebuilt) and a lsd works then that’s what I shall do, but if 280 rips it to bits then I’d rather change box and spend £ that way.
What you think?
Cheers

 

[Gt Lad]

I 1st used clio 197 gearbox when I did a r26 conversion. I found if you revved it out to 6800 rpm you only dropped down to 5300 so no rev range to play with . It felt stupidly quick but in reality you spent as much time changing gear as in gear. I compete in hillclimbs and found megane box much longer ratios felt slow but is quicker . My advise use a dci box

We talking 182 here?
Do you know if dci box is tried n tested?
Thanks mate

 

[Gt Lad]

I 1st used clio 197 gearbox when I did a r26 conversion. I found if you revved it out to 6800 rpm you only dropped down to 5300 so no rev range to play with . It felt stupidly quick but in reality you spent as much time changing gear as in gear. I compete in hillclimbs and found megane box much longer ratios felt slow but is quicker . My advise use a dci box

And also will pms gear linkage kit fit?

 

[bloke]

ratios on the standard box are no good for boost, especially decent power. some of the dci boxes are fine but a couple of them have a stupidly high 5th gear (could be thinking of the later box though sorry)

going for a later 6 speed box isn't a straighforward conversion though.

have a look through this if you want to check ratios. i've ran a few boosted cars with dci boxes and it can work well.

http://www.volvohowto.com/jc5-jb3-jb5-jb1-and-jb0-renault-gearbox-ratios-and-applications/

 

[197 turbo sprinter]

We talking 182 here?
Do you know if dci box is tried n tested?
Thanks mate

Nick at pure m used to use a dci box

 

[Gt Lad]

ratios on the standard box are no good for boost, especially decent power. some of the dci boxes are fine but a couple of them have a stupidly high 5th gear (could be thinking of the later box though sorry)

going for a later 6 speed box isn't a straighforward conversion though.

have a look through this if you want to check ratios. i've ran a few boosted cars with dci boxes and it can work well.

http://www.volvohowto.com/jc5-jb3-jb5-jb1-and-jb0-renault-gearbox-ratios-and-applications/

Wow I just looked, there’s loads to look at! Not an easy subject! I think it’s a case of try it! Decisions decisions ?

 

[STEVE.M]

Wow I just looked, there’s loads to look at! Not an easy subject! I think it’s a case of try it! Decisions decisions ?

An 089 makes a lot of sense.

will top out at 158mph @ 7000rpm,

but as a daily, this should not be a great inconvenience.

 

[bloke]

they just don't work well with an na box.

 

[STEVE.M]

they just don't work well with an na box.

What?

 

[bloke]

boosted engines running decent power, the ratios and fd on the standard box spoils the way they drive.