Ohisofly’s 91 Si project – 700hp or bust

 
Old 03-07-2019, 10:45 AM
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Default Re: Ohisofly’s 91 Si project – 700hp or bust

Originally Posted by DaX View Post
Bummer. I had to do mine twice too. The can of wrinkle paint definitely had enough to do 2 valve covers though, if using their prescribed method of 3 thick coats.
Yea I had enough to redo mine and probably enough to do another valve cover too. I’m pretty happy with how it came out overall

It’s been a little while but here’s what I’ve been up to

Measured the valve to valve clearances



Have plenty of room for adjustment



Had to file down a washer to get the degree wheel to fit properly



Installed bbs to lock vtec, used check valve springs, and bent a coat hanger to reference against the degree wheel. After putting the timing belt on and setting up the dial indicators I degreed the cams and measured piston to valve clearances







I've seen various figures on what's considered safe minimum p2v clearance but even going conservative with a minimum .100 or .080 still allows for plenty of room to play with cam adjustment. Degreeing them put it at -1, -1 which seems reasonable given the decked head & block



Then I started putting together the head, OEM valve seals



Supertech 85 lb springs, supertech steel retainers, blox lmas



Ferrea 6000 std valves and ferrea keepers



Head ready to bolt down



ARP headstuds



Bolted down



Delta 272 cams





Redoing the valve cover





Not perfect but it’ll do



New timing belt covers & gaskets











I accidentally got the wrong bottom cover so had to shave the bottom a little bit. It doesn’t sit flush against the oil pump at the bottom but close enough





Covers on







Started working on my transmission again, the youtube video I was following had the orientation of the 3/4 hub & slider upside down, causing everything on the mainshaft to be off a little bit. The case ultimately was maybe 2 or 3mm from closing



You can see the bearing at the top of the mainshaft isn't down the whole way





The hub & slider being upside down caused this needle bearing to be off, hence pushing up everything on the mainshaft





Took everything apart and cleaned it since it’s been sitting for maybe 6 months or so



All back together, replaced the 5th gear cuff mainshaft bearing as it was a little rough



I still need to find the c-clip that holds the countershaft to the case and the axle seals but it’s almost finished



Skunk2 70mm throttle body



Installed with a thermal gasket



Speedfactory 4bar map sensor



This is how it’s sitting right now



Currently waiting on new vtec solenoid gaskets and need to find the transmission seals that I have somewhere. Hopefully in the next few weeks I’ll be able to get the motor and trans dropped in so I can finish wiring the engine bay and start working on the turbo setup. Planning on a divided top mount manifold
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Old 03-08-2019, 02:54 AM
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Default Re: Ohisofly’s 91 Si project – 700hp or bust

awesome work, man. Always wanted a CRX but finding one in decent condition is nearly impossible.
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Old 03-08-2019, 03:29 AM
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Default Re: Ohisofly’s 91 Si project – 700hp or bust

Lookin good! Subbed
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Old 03-08-2019, 04:02 AM
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Default Re: Ohisofly’s 91 Si project – 700hp or bust

Looking good! I still cringe when I see a broke down transmission.
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Old 03-08-2019, 06:32 AM
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Default Re: Ohisofly’s 91 Si project – 700hp or bust

Originally Posted by Txdragon View Post
Looking good! I still cringe when I see a broke down transmission.
Why? Its amazing how simple it is once you get it apart.
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Old 03-08-2019, 06:57 AM
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Default Re: Ohisofly’s 91 Si project – 700hp or bust

Originally Posted by LightningTeg View Post
Why? Its amazing how simple it is once you get it apart.

I'm sure, like many things, it's only scary the first time you do it.... I, too, have yet to crack one open. It's only a matter of time.
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Old 03-08-2019, 09:20 AM
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Default Re: Ohisofly’s 91 Si project – 700hp or bust

Originally Posted by LightningTeg View Post
Why? Its amazing how simple it is once you get it apart.
<br /><br />
Originally Posted by 2x0 View Post
I'm sure, like many things, it's only scary the first time you do it.... I, too, have yet to crack one open. It's only a matter of time.
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Old 03-08-2019, 09:22 AM
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Default Re: Ohisofly’s 91 Si project – 700hp or bust

Originally Posted by LightningTeg View Post
Why? Its amazing how simple it is once you get it apart.
Originally Posted by 2x0 View Post
I'm sure, like many things, it's only scary the first time you do it.... I, too, have yet to crack one open. It's only a matter of time.
It could be. I am actually looking locally for a throw away transmission to use like a med student uses a cadaver.
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Old 03-08-2019, 09:58 AM
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Default Re: Ohisofly’s 91 Si project – 700hp or bust

Jeff Evans has a 3 part video on you-tube on how to disassemble and reassemble B series trans
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Old 03-08-2019, 10:10 AM
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Default Re: Ohisofly’s 91 Si project – 700hp or bust

It's intimidating at first but, like others said, it's very simple once you get your feet wet. I personally lay every piece out in order as I take it out. Makes life a little easier! Its really cool once you get comfortable.
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Old 03-08-2019, 11:35 AM
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Default Re: Ohisofly’s 91 Si project – 700hp or bust

Originally Posted by NVturbo View Post
awesome work, man. Always wanted a CRX but finding one in decent condition is nearly impossible.
Originally Posted by 2x0 View Post
Lookin good! Subbed
Originally Posted by Txdragon View Post
Looking good! I still cringe when I see a broke down transmission.
Thanks guys, I'm finally starting to make some good traction with this thing

This was the first transmission I've ever split the case on and it was definitely intimidating at first but it eventually starts making sense. The main negative for me was you won't find nearly as much info about rebuilding a b series tranny as a b series engine, so if you get stuck as in my case it can be a little tricky. Blown up diagrams of how everything stacks on the countershaft and mainshaft ended up being my best friend
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Old 03-12-2019, 06:31 AM
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Default Re: Ohisofly’s 91 Si project – 700hp or bust

I don't need this coolant port anymore



Welded it shut



Don't need this small one on the top either



Only the port nipple itself was steel, the rest is aluminum. Forgot to get an after picture but it doesn't look good. It's watertight though which is all that I really care about



Starting to look like an engine. Mocked up the fuel filter, fuel rail, fuel pressure regulator and injectors. Ended up ordering some fittings I'll need to complete the fuel lines but it's looking good overall





Ordered a new distributor clip because this one is toast



New vtec solenoid gaskets









I ordered new axle seals for the transmission, should be able to bolt together the case this weekend. Once that's finished just need to put on the twin disc and drop it in. I ordered a bunch of pipe for the turbo manifold which should be here next weekend as well
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Old 03-12-2019, 07:02 AM
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Default Re: Ohisofly’s 91 Si project – 700hp or bust

Not crazy about the filter hanging off the fuel rail like that. Vibration and fuel fittings scare me lol
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Old 03-12-2019, 07:36 AM
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Default Re: Ohisofly’s 91 Si project – 700hp or bust

Originally Posted by LightningTeg View Post
Not crazy about the filter hanging off the fuel rail like that. Vibration and fuel fittings scare me lol
Agreed, aluminum fittings plus vibration is recipe for disaster. I had a buddy mount his FPR like that and let's just say it didn't end well.
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Old 04-09-2019, 03:29 PM
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Default Re: Ohisofly’s 91 Si project – 700hp or bust

Appreciate the feedback guys, I'll see what I can do to move the filter and mount it to the body

Finishing up the transmission with new seals







Old throwout bearing



Old vs new



New bearing in with Honda urea grease



Ready to go back together





SpeedFactory heavy duty detent springs





Transmission finally all finished



New front bumper



Hasport mounts



2.75" intercooler piping



Piping to make the manifold, treadstone 1.5" schedule 10



1/2" thick mild steel divided t4 flange



Head flange that adapts the head port to 1.5"



4" vibrant exhaust bellow for the exhaust, also have two 1.75" exhaust bellows for the wastegates



Moving on to redoing the engine harness



Removing the wire loom



Mocking everything up, kinda sorta tucking it









Along with shortening and extending wires as needed, I also replaced a bunch of connectors

Old distributor connectors





Old alternator plug, ended up changing it to an obd2 style alternator plug



Almost finished, need to bolt up the trans to finish the reverse switch and starter solenoid wire



Took the engine off the stand so I can bolt up the transmission and finish the engine harness



Hopefully next week I can get the flywheel & clutch setup bolted on and then after putting on the trans, it's ready to drop in
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Old 04-09-2019, 03:46 PM
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Default Re: Ohisofly’s 91 Si project – 700hp or bust

Looking good man! Lots of progress
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Old 04-15-2019, 07:30 AM
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Default Re: Ohisofly’s 91 Si project – 700hp or bust

Originally Posted by DaX View Post
Looking good man! Lots of progress
Thanks man! I’m glad it’s starting to come together

Finished up the engine harness



Distributor plugs tucked away down by the thermostat



Used a BRZ oil drain plug to block off the coolant fan switch on the back of the block, now the switch is on the thermostat housing





ARP flywheel bolts



Flywheel torqued down



Clutch & pressure plate on



Switching to the hush performance pull style slave cylinder



Ready to go in



Used a 9/16” drill bit to drill out the bottom two holes of the t-bracket as the t-bracket was originally for a cable transmission



Moved the fuel filter here next to the t-bracket



Ready to go in







Mission accomplished









Plenty of room back here



Time to party



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Old 04-15-2019, 08:30 AM
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Default Re: Ohisofly’s 91 Si project – 700hp or bust

Very nice job with the assembly and installation sir

The fuel filter looks nice and tucked back there, how is access to it with the engine in place though?
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Old 04-15-2019, 11:47 AM
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Default Re: Ohisofly’s 91 Si project – 700hp or bust

Originally Posted by 2x0 View Post
Very nice job with the assembly and installation sir

The fuel filter looks nice and tucked back there, how is access to it with the engine in place though?
Thanks man, trying my best

The intake manifold would definitely have to come off to access the fuel filter, kind of a pain but that's what I get for wanting it out of the way. I'll get a picture with the intake manifold removed, I just have it mocked up for the pictures.
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Old 04-16-2019, 03:49 AM
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Default Re: Ohisofly’s 91 Si project – 700hp or bust

Insane build...
Whats the advantage with the hush performance pull type slave cylinder?
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Old 04-16-2019, 07:08 AM
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Default Re: Ohisofly’s 91 Si project – 700hp or bust

Awesome work so far. Delooming that harness looks like a complete pain
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Old 04-16-2019, 07:31 AM
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Default Re: Ohisofly’s 91 Si project – 700hp or bust

Originally Posted by LightningTeg View Post
Awesome work so far. Delooming that harness looks like a complete pain
Wiring is the fun stuff, lol. I should have taken a pic of the pile of electric tape last weekend when I did mine.
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Old 04-16-2019, 07:39 AM
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Default Re: Ohisofly’s 91 Si project – 700hp or bust

Originally Posted by DaX View Post
Wiring is the fun stuff, lol. I should have taken a pic of the pile of electric tape last weekend when I did mine.
Props to you for tackling it and even calling it "fun" lol. I suppose I might think it was fun too, if I had the slightest clue how to do things correctly.
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Old 04-16-2019, 07:56 AM
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Default Re: Ohisofly’s 91 Si project – 700hp or bust

Originally Posted by Balor_Gr View Post
Insane build...
Whats the advantage with the hush performance pull type slave cylinder?
Thank man. The normal slave cylinder can get in the way of the header or turbo manfiold/downpipe as it usually mounts on that side of the clutch fork. The pull type slave cylinder mounts on the opposite side of the clutch fork so it gives you more room to play with. OEM on top, pull type on bottom:



Originally Posted by LightningTeg View Post
Awesome work so far. Delooming that harness looks like a complete pain
Appreciate it man. That part was definitely tedious but I enjoy wiring so no complaints

Originally Posted by DaX View Post
Wiring is the fun stuff, lol. I should have taken a pic of the pile of electric tape last weekend when I did mine.
I should have done that too, ended up with a bunch of loom, tape & wiring that had to be swept up

Originally Posted by 2x0 View Post
Props to you for tackling it and even calling it "fun" lol. I suppose I might think it was fun too, if I had the slightest clue how to do things correctly.
Lots of practice and having the right tools always helps. Ever since I got my weller soldering iron with a **** to adjust the temperature wiring has been a much more pleasant experience.
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Old 04-16-2019, 08:12 AM
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Default Re: Ohisofly’s 91 Si project – 700hp or bust

I'll just be glad when I can quit crawling up under the dash pulling wires....I'm almost done with that though. Yeah, the right tools make the difference. I'm still using my Hakko station I bought 20 years ago - busted as hell but still going strong! When it does die I think I'm going to get a Weller.


Last edited by DaX; 04-16-2019 at 11:31 AM.
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