I just picked up the new honda tuning out of the mailbox this morning and flipped through it to see Top Fuel's AP1 Type RR turbo S2000. I read through the article and I see that they actually utilized a Silvia S15 five speed. They used a multi plate OS Giken clutch and for the rear they swapped in a limited slip diff from an RX7. I figured this is another option for us and they have made alittle over 600hp on this setup for the last 3 years with little to no issues.

 

interested, how much do the s15 five speeds go for, bc i cant afford the supra getrag option

 

not too sure but i figure there is going to be some kind of adapter plate involved also. it just wasn't stated in the article.

 

silvia 5 speeds are not bulletproof by no means

 

and its only 5 gears ok i know thats not a big deal lol.

 

sounds like FAIL to me. :/

 

It obviously has to be an ok setup if it has lasted on a track only race car for 3 years. seems like it may be worth a try. If it wasn't a decent combo then why would a reputable place like Top Fuel use it? I mean they have a full carbon body ap1 that weighs in at 2000lbs, its not like they couldn't afford a better higher dollar setup. But instead they went off the beaten path a tried something new. Just an idea though

 

If anything Nismo makes a 6-speed racing transmission for the Silvia. Not sure what the cost is, though.

 

Kinda weird, the S15´s I´ve seen are all 6-speed. 5 speed in S13 and S14. Nissan have great gearboxes, abused a bunch of them and they´re solid for a stock tranny. Not like the Supra and BMW box but a bit better than ours.
If I made the adapter, linkage and clutch I think I would use a better one, too much work for the extra 100ft/lbs IMO.
These are my options -> US tranny (Camaro or Mustang), BMW ZF, 350Z or custom seq.

Interested in the RX7 rear, final drive ratio?

 

I wanna know what all it takes to bolt up the rx7 rear and what year they ganked it from.