Hi Guys'n'Gals (not sure if this is the right forum, moderators please move if not)
I am in the process of putting an RB20 DET into an my S13 and, as I also have an R32 GTR which is currently being dry sumped by Dazmo, one of the true genltemen in our sport, I thought I would install two factory standard rb26 turbos onto the RB20 rather than going to a high mount. I am getting steamer pipe manifolds made as two of the head/manifold studs didn't line up with the RB26 manifold. Would have used the RB26 plenum as well and triple throttle bodies but the intake venturies on the RB20 are tapered and would not allow any flow increase from having extra throttle bodies so went with an aftermarket plenum and 85mm throttle body. Also went with MAP sensing rather than AFMs.
The car will have two tunes in its Microtec LT12, one for me to do circuit work with a rear wheel drive car and one for my son to learn drifting. I am aiming for about 300rwhp and will eventually swap the Garret 2860-7 turrbos from my GTR with -5s and put the -7s into the S13. I am not sure how laggy the S13 will be for circuit work, should be fine for driftin. Have considered using an exhaust cam off a non turbo RB20 which has a slightly higher lift or going to an after market cam with a few degree longer opening (if that is the correct terminoligy) to increase the exhaust gasses to the turbos.
I would really appreciate any constructive Tips or Traps to look out for with this build from anyone who has done this type of conversion before.
Thanks
Pete
PS. Lookout for my R32 once Dazmo has finished with it. Can't say I will be able to to get to 'Holy Grail' status at Willowbank but I bet Darren will.