Hi everyone.. I’m in the process of building my 93 Integra, but I have a few questions I need to get answers to before I start installing the engine and stuff. First, heres a list of everything going into it: (Not including engine management):


B16 Shortblock:
Benson Sleeves
Micropolished/Chanfered crank
Balanced/Blue Printed
Crower Rods
Arias Pistons

VTEC Head from a 95 Delsol:
Custom grind Web cams (setup for forced induction)
Completely ported/polished Del Sol head
Stainless Steel swirl polished valves
Titanium valve springs/retainers

Misc:
Complete Rev Hard Turbo kit (T3/4 Hybrid, using the Tial wastegate instead of the Deltagate)
Ported Type-R Intake

That’s everything I have so far, I’m still undecided on exhaust, and a few other things – This is why I’m making this post …

Heres the list of questions:

1) The turbo kit comes with a 2.5” downpipe – I’m wondering, is that really going to be big enough? I’ve owned other turbo cars, and I’ve always seen good performance gains with a 3” downpipe (Faster spooling). Do you think I should have a 3” downpipe made? Or stick with the 2.5” one that came with the kit?

2) I’m going from a non-vtec engine to a Vtec engine – I’m curious, if I hook up the stock (non-vtec) computer, without doing any wiring or anything for the Vtec solonoid and stuff, will I be able to drive the car? I hope to put the engine in, and drive it 400 miles to a shop to have a new ECU, Stage 4 Hondata, etc installed… I would LIKE to let them do the wiring to hook up the Vtec solonoid and stuff. Or will I need to do it to drive it out there? In theory, I should be able to drop the engine in, hook up everything I can (excluding the Vtec stuff) and be able to drive the car just fine.. I’m just curious if it’ll really work like that

3) I plan on running 24 PSI of boost at the track, what size injectors will I need to be able to do this safely? Are 720cc injectors going to be big enough? Or should I look at 800cc+ injectors?

4) I plan on running some sort of aftermarket LSD, however, I’m not 100% sure which one to go with yet.. Any suggestions? Also, is there anything I can do to the transmission itself to make it handle the horsepower better? I know Cryogenically treating the gears and stuff is possible, anything other than that? I hope to dyno around 450HP, and I have a bad feeling the stock transmission isnt going to hold up for a long time with those numbers. Any recommendations on a good tranny builder?

5) Back to exhaust again – Who out there makes a 3” catback for these cars? Only company I know of is Thermal Research & Development. Any others? Only requirement is none of that annoying buzzing crap. If I want to hear a weedwacker, I’ll buy one … The quieter the better, but I don’t want to give up much airflow to keep it quiet. Also, anyone know of a web page that has sound bytes of different exhaust systems on Hondas? It’d be nice to hear a couple to be able to make a decision.

Well, that’s all I can think of for now.. I’m sure I’ll have more long posts soon! Hehe, this project got way bigger than I anticipated….

Thanks in advance guys/gals!
--Joe