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Ohisofly’s 91 Si project – 700hp or bust
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Background – This was my first car, have owned it since 2009. The previous owner used it as a db drag car: Below are some pics leading up to now, it’s definitely been a learning experience. When I first bought the car https://cimg3.ibsrv.net/gimg/honda-t...6a9d3e9037.jpg https://cimg4.ibsrv.net/gimg/honda-t...024e9e0c1a.jpg https://cimg5.ibsrv.net/gimg/honda-t...adcbe4e0c4.jpg https://cimg6.ibsrv.net/gimg/honda-t...84ccd7dc19.jpg Came with an ls swap https://cimg1.ibsrv.net/gimg/honda-t...afdc1d4285.jpg A long time ago I used to autocross it https://cimg5.ibsrv.net/gimg/honda-t...660eed3e9b.jpg https://cimg1.ibsrv.net/gimg/honda-t...685c2a37fa.jpg https://cimg0.ibsrv.net/gimg/honda-t...5517b1168f.jpg Chalkboard hood https://cimg3.ibsrv.net/gimg/honda-t...50bb3dcd71.jpg https://cimg8.ibsrv.net/gimg/honda-t...01d4296694.jpg https://cimg8.ibsrv.net/gimg/honda-t...b992abb09f.jpg https://cimg6.ibsrv.net/gimg/honda-t...127e1d61a3.jpg Looked like this for a while https://cimg5.ibsrv.net/gimg/honda-t...110bb37ab0.jpg The engine it came with had a good bit of cylinder leakage so did a stock rebuild on another ls and threw that in there https://cimg9.ibsrv.net/gimg/honda-t...7a22d82c3a.jpg https://cimg7.ibsrv.net/gimg/honda-t...9367e6b876.jpg Bone stock 91 Si I had for a while as a daily https://cimg0.ibsrv.net/gimg/honda-t...4a4948d73a.jpg https://cimg1.ibsrv.net/gimg/honda-t...7ab893f1f4.jpg https://cimg6.ibsrv.net/gimg/honda-t...eaa48bb269.jpg https://cimg7.ibsrv.net/gimg/honda-t...3516460e6d.jpg The first turbo build ended up blowing up https://cimg7.ibsrv.net/gimg/honda-t...0a6c75845e.jpg After that I put a b20 in it https://cimg4.ibsrv.net/gimg/honda-t...c3abb375e9.jpg Now it’s torn apart again and going lsv Curent build:
https://cimg1.ibsrv.net/gimg/honda-t...1739ae62e5.jpg https://cimg6.ibsrv.net/gimg/honda-t...8e82b54d3a.jpg Shooting for 700hp. I’ll post more pics when I get a chance |
Re: Ohisofly’s 91 Si project – 700hp or bust
Sumped the tank
https://i63.tinypic.com/2znv9k6.jpg https://i65.tinypic.com/33oo64i.jpg https://i67.tinypic.com/2nsun0w.jpg https://i67.tinypic.com/2yukmmq.jpg https://i67.tinypic.com/219v48y.jpg Added a -8 bung for the return https://i66.tinypic.com/2qs3p6u.jpg Painted it https://i65.tinypic.com/hsjlo4.jpg https://i67.tinypic.com/bfgbkg.jpg Put this craft foam on the top to prevent noise. I put a bolt where the stock feed banjo goes and bent the return tube shut on both sides https://i66.tinypic.com/dqn0qu.jpg Picked the head up last Friday, the machine shop checked it for flatness & it's good just has some knicks in it here and there. Valve guides are reamed out, should be ready to put back together now Previous owner used this as a db drag car :| https://i63.tinypic.com/2nldcfm.jpg https://i66.tinypic.com/282n9g3.jpg https://i68.tinypic.com/2q3n97d.jpg Ultimately used 40 pounds of dry ice. If there wasn't any dynamat the stock sound deadening would probably come out with 5 or 10 pounds. https://i67.tinypic.com/sl5jps.jpg https://i64.tinypic.com/vqpixg.jpg https://i64.tinypic.com/29zt1lg.jpg https://i64.tinypic.com/axohnc.jpg https://i66.tinypic.com/34nnvjr.jpg This is 40 pounds, when it was said and done it was around 50 https://i67.tinypic.com/2vn4dnk.jpg Getting ready for paint https://i64.tinypic.com/intpph.jpg https://i68.tinypic.com/2pq7wwo.jpg https://i66.tinypic.com/1gf1k.jpg Primer & paint https://i67.tinypic.com/qnpf75.jpg I'm not sure what this blue stuff is, seems like a spray on rhino lining type of thing. It came off slowly if you chipped at it but after my third trip to get dry ice it was good enough for me https://i68.tinypic.com/10xbwb9.jpg Floor & trunk all painted https://i64.tinypic.com/j65wrs.jpg Carpet and rear interior partially back together https://i68.tinypic.com/212hjet.jpg That's it for now |
Re: Ohisofly’s 91 Si project – 700hp or bust
Build is looking great so far man. Keep up the good work. I'm building a kswapped 91 sedan....slowly lol
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Re: Ohisofly’s 91 Si project – 700hp or bust
Originally Posted by 91efdx
(Post 51776636)
Build is looking great so far man. Keep up the good work. I'm building a kswapped 91 sedan....slowly lol
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Re: Ohisofly’s 91 Si project – 700hp or bust
Added a banjo to ¼” barb fitting for the breather
https://i65.tinypic.com/nbzq4l.jpg Used an eg evap valve https://i67.tinypic.com/5v183c.jpg Tank in https://i63.tinypic.com/2nsnfyo.jpg Pumps & pre-filters https://i66.tinypic.com/32zkva8.jpg Couldn’t find a great spot to easily mount the fuel pumps so ended up making this bracket. It goes right between the tank and driver’s side rear trailing arm https://i67.tinypic.com/2q1dlwx.jpg https://i68.tinypic.com/2eq6jat.jpg After primer and paint https://i67.tinypic.com/33a3o8g.jpg https://i68.tinypic.com/6ibb4j.jpg https://i67.tinypic.com/20pr6ll.jpg Mocked up https://i63.tinypic.com/2nqrsqo.jpg Starting to run the lines https://i67.tinypic.com/nqti4y.jpg Used this grommet from the stock fuel lines to run the power wires to the fuel pumps https://i65.tinypic.com/5al46o.jpg Area behind the glovebox https://i68.tinypic.com/34sno9g.jpg Riveted some 16-gauge steel I had to it https://i63.tinypic.com/21djriu.jpg https://i63.tinypic.com/px3br.jpg https://i65.tinypic.com/nmyo1w.jpg Mocked up minus the fuel pump relays https://i68.tinypic.com/28i502h.jpg Wiring everything up https://i65.tinypic.com/23h40mh.jpg Mostly finished https://i67.tinypic.com/732n0i.jpg This is how I wired up the pumps, used a delay relay set to 2 seconds for the second fuel pump https://i66.tinypic.com/2cfd34h.jpg Stock ls distributor https://i64.tinypic.com/t5k5xi.jpg Coil removed https://i67.tinypic.com/2q19zt0.jpg Wiring it up for the external coil https://i63.tinypic.com/2mfjded.jpg https://i64.tinypic.com/2v0g7df.jpg Stock coil vs blaster hvc coil https://i67.tinypic.com/2r70s4g.jpg This is how I wired up the MSD, still need to figure out where I want to mount the new coil https://i64.tinypic.com/delva.jpg Primer & paint for the coolant tube on the back on the block https://i67.tinypic.com/2s6kdgg.jpg https://i63.tinypic.com/2ufd94g.jpg Bought some Ferrea 6000 valves & dropped the head off at the machine shop for a valve job. While I’m waiting for the head to be finished I’ll be wrapping up the fuel lines and wiring |
Re: Ohisofly’s 91 Si project – 700hp or bust
Very tidy installation you have going there. Nice work!
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Re: Ohisofly’s 91 Si project – 700hp or bust
Your fuel pump hanger came out clean man! Always love seeing people building their own cars. Keep it up. |
Re: Ohisofly’s 91 Si project – 700hp or bust
Love the fuse panel, that looks clean and easy to work on.
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Re: Ohisofly’s 91 Si project – 700hp or bust
Nice work so far
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Re: Ohisofly’s 91 Si project – 700hp or bust
Interested to hear your feedback on the action twin disc. I ordered a comp twin for mine since I've driven a few of my customers cars with the comp but I've always liked action single disc clutches over comp clutches. |
Re: Ohisofly’s 91 Si project – 700hp or bust
Originally Posted by goatharper
Very tidy installation you have going there. Nice work!
Originally Posted by K7-1Ktrevor
Your fuel pump hanger came out clean man! Always love seeing people building their own cars. Keep it up.
Originally Posted by LankorDie
Love the fuse panel, that looks clean and easy to work on.
Originally Posted by 93grayeg
Nice work so far
Originally Posted by K7-1Ktrevor
Interested to hear your feedback on the action twin disc. I ordered a comp twin for mine since I've driven a few of my customers cars with the comp but I've always liked action single disc clutches over comp clutches.
Picked up the head from the machine shop, got a 3 angle valve job & head was decked .004" https://i64.tinypic.com/1z57ock.jpg Ferrea 6000 valves, bronze valve guides & keepers Supertech 85 lb springs and steel retainers Blox lma https://i65.tinypic.com/nph1lh.jpg Made a bracket to move the proportioning valve to the firewall https://i66.tinypic.com/2hh2lw8.jpg https://i64.tinypic.com/28jvxi.jpg Primer https://i68.tinypic.com/10dv4eg.jpg Paint https://i68.tinypic.com/34448d3.jpg https://i68.tinypic.com/1taj4n.jpg https://i63.tinypic.com/29gn37k.jpg https://i63.tinypic.com/6icvvd.jpg While making more fuel line ended up snapping this fitting, currently waiting on another one https://i67.tinypic.com/15fm8uw.jpg This is the section I was tightening, it was the adapter from one of the fuel pump outlets to -10 an https://i68.tinypic.com/4gkr37.jpg Making a mount for the coil https://i68.tinypic.com/2i1e9s1.jpg My brother is a welder, he wasn't home so I used his mig. It's pretty obvious I have no idea what I'm doing haha :) https://i64.tinypic.com/15noz1e.jpg After Grinder https://i64.tinypic.com/kb6tue.jpg Primer https://i64.tinypic.com/121wq6p.jpg Paint https://i66.tinypic.com/24czgc2.jpg All bolted & wired up. I tried using the top left stud for the ecu but ended up just making a hole where that stud was and using a bolt & nut. You can't see it but the ground for the coil is directly under it which just grounds the coil to the bracket/body https://i68.tinypic.com/r24ymu.jpg Drilled out the rivets for the valve cover baffling https://i63.tinypic.com/300wsn6.jpg Used a m6x1 tap so I can use bolts to put it back together. I'll be using red loctite https://i65.tinypic.com/2uqipoo.jpg Used a carbide bit to grind down two bolt holes on the front of the valve cover. I forgot to take a finished picture https://i63.tinypic.com/259lpi1.jpg Before https://i64.tinypic.com/2hmq7tj.jpg During https://i66.tinypic.com/2iau9zk.jpg After https://i64.tinypic.com/hx6ulg.jpg I'll get some better pictures but I ended up using an aluminum 3/4" tube for making the holes Next on my list is getting this valve cover welded up, finish some wiring and then messing with the engine |
Re: Ohisofly’s 91 Si project – 700hp or bust
Small update - worked on the valve cover bungs
https://i66.tinypic.com/6glrgg.jpg Welded on the inside and out https://i63.tinypic.com/rk24ue.jpg Forgot to get a picture before the jb weld but just used this to make it look a lot better https://i63.tinypic.com/2zqrazr.jpg One down, one to go. Used a file and then 150 grit to clean it up. Still has a little bit to go before it's ready for paint https://i68.tinypic.com/2j2fgna.jpg I bought this for $5, intended on putting this on top of the steering column piece as that's where I want the gauges https://i68.tinypic.com/f2r0io.jpg After some trimming, it was clear that it was still going to block way too much of the center of the gauge cluster. This is an issue because I'm ultimately going to place the tunerview display here https://i64.tinypic.com/witu9e.jpg It also looks like this gauge pod would have a similar issue albeit not as bad https://i64.tinypic.com/2870pbt.jpg I ended up going this route, notched out the upper corners and then jb welded the gauges to the top steering column piece https://i64.tinypic.com/2hq6zy9.jpg For the time being, I'm temporarily mounting the tunerview where the radio was. Here's making the plastic cover for it https://i63.tinypic.com/2vj4eis.jpg https://i66.tinypic.com/2n741o7.jpg https://i67.tinypic.com/ilj38n.jpg https://i66.tinypic.com/2chszsj.jpg https://i64.tinypic.com/mi14s8.jpg I think it turned out alright https://i64.tinypic.com/35m2lps.jpg Finished cleaning up the wiring to the battery and front of the bay. Still need to make or purchase a battery mount, going with a pc680 style battery https://i66.tinypic.com/a1u2xx.jpg Just received this from tristate https://i67.tinypic.com/2uiyz5c.jpg Current wiring situation https://i67.tinypic.com/2bsjmu.jpg Almost finished, I still need to wire up my oil pressure sensor, fuel pressure sensor and flex fuel sensor. Sent my cams out for the delta 272 regrind and ordered stuff to degree the cams, once all of that arrives I can start measuring clearances and putting the head together |
Re: Ohisofly’s 91 Si project – 700hp or bust
Nice work here!
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Re: Ohisofly’s 91 Si project – 700hp or bust
Looking good, lots of detail and thought going into your setup |
Re: Ohisofly’s 91 Si project – 700hp or bust
Love the detail!
Also can you explain the dry ice process? Does that just cause the rubber to contract and fall apart? |
Re: Ohisofly’s 91 Si project – 700hp or bust
Originally Posted by LightningTeg
(Post 51807632)
Love the detail!
Also can you explain the dry ice process? Does that just cause the rubber to contract and fall apart? |
Re: Ohisofly’s 91 Si project – 700hp or bust
Ebay wastegates and BOVs are good at 700hp?
Im still in a market for a BOV and been avoiding those lol |
Re: Ohisofly’s 91 Si project – 700hp or bust
Originally Posted by solo227
(Post 51807849)
Ebay wastegates and BOVs are good at 700hp?
Im still in a market for a BOV and been avoiding those lol |
Re: Ohisofly’s 91 Si project – 700hp or bust
Originally Posted by Chance EG
(Post 51808039)
No.
He has a good build going. It would prolly be smart to just pick up a used one if he's aiming for that much power. |
Re: Ohisofly’s 91 Si project – 700hp or bust
Appreciate the kind words guys
The brand wastegates & bov I bought (wyntonm speed) have a pretty good reputation, especially in the v8 world. They're copies of tial designs so I'm not too worried but we'll see how they do Painted the bay this past weekend https://i63.tinypic.com/11i1t8z.jpg Scuffed everything with a scotch brite pad. I didn't go too crazy trying to make it perfect as someday I'll probably shave the bay, just wanted to clean it up for now https://i64.tinypic.com/dtddz.jpg https://i67.tinypic.com/2n86dyo.jpg Two coats of rustoleum primer https://i65.tinypic.com/2jbqyk3.jpg https://i67.tinypic.com/2e1vlhk.jpg First two coats of rustoleum gloss white https://i68.tinypic.com/2lkbb4w.jpg https://i65.tinypic.com/x1x0tu.jpg This is after the third coat but I ended up doing four in total https://i67.tinypic.com/33xfv68.jpg I ordered some spraymax 2k clear so this weekend I can finish it up Made a cardboard template for the catch can, it'll go where the windshield washer reservoir was https://i64.tinypic.com/xau6a.jpg The side against the car has this notch in order to sit flat https://i63.tinypic.com/2mf17w4.jpg Got some kirkeys, still waiting on the seat covers https://i67.tinypic.com/15fi0wy.jpg |
Re: Ohisofly’s 91 Si project – 700hp or bust
Awsome build! Dont see too many high hp rexes anymore. You are inspiring me to swap mine. lol
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Re: Ohisofly’s 91 Si project – 700hp or bust
Originally Posted by umair
(Post 51810087)
Awsome build! Dont see too many high hp rexes anymore. You are inspiring me to swap mine. lol
Not much progress lately with Christmas & New Years but here's some pics anyways Seat covers came in the mail https://i63.tinypic.com/2czbyf8.jpg Installed a gates 170 degree thermostat https://i66.tinypic.com/jsip80.jpg My front rims came in the mail, 15x10 with 5.5" backspacing. I need to clean up some of the weld splatter on them before getting them powdercoated https://i67.tinypic.com/25upkxf.jpg https://i67.tinypic.com/2v17m8l.jpg Finally got around to clear coating the bay https://i63.tinypic.com/r1zol1.jpg Came out pretty good, far from perfect but I'm happy with it https://i64.tinypic.com/21vnn6.jpg https://i65.tinypic.com/28wl6aq.jpg GM flex fuel sensor with 8 an fittings https://i65.tinypic.com/24gvfpl.jpg Here's the ground for the flex fuel sensor and oil pressure gauge https://i63.tinypic.com/2rmxd6r.jpg This is my 12v source at ignition on and run for the boost controller and oil pressure gauge https://i63.tinypic.com/69j5mu.jpg Removing more dynamat https://i64.tinypic.com/5l2i43.jpg https://i64.tinypic.com/2gt5gua.jpg Didn't get a picture after it was removed from the door panel but you get the idea. If I get bored I'll end up doing the passenger's side door as well https://i66.tinypic.com/30ng13o.jpg Finished welding the an fittings on the valve cover. They were welded on both the outside and inside to make sure they're solid https://i67.tinypic.com/2z83fhi.jpg I originally wanted to use m6x1 10mm bolts to bolt down the baffle but it didn't end up working as well as I anticipated. Ultimately I ended up using 3/16" x 1/4" aluminum rivets, I was a little skeptical at first but it ended up being really solid. Hondabond was used in between the baffle and the valve cover. You can see some of the holes are missing rivets, this is due to those holes being too shallow for the rivets (wasn't enough material to drill the holes any deeper) https://i65.tinypic.com/dr5tg6.jpg Here's the valve cover as of now, I'm going to use some normal jb weld epoxy to fill in the small pits that I currently have. I used the jb weld 'steelstik' which is basically a 2 part putty for everything so far. I've seen mixed things about powder coating over jb weld so I'll see if my powder coater is comfortable with it or not. If not I'll probably just spray paint it https://i65.tinypic.com/30rsi0p.jpg |
Re: Ohisofly’s 91 Si project – 700hp or bust
Small areas of JB weld should be alright. As long as the powder sticks. I had some spots fixed up on a valve cover once that were JB'd and it powder coated just fine. Worst case scenario, your tech can't guarantee it'll take or it may flake after x amount of time. **shrug**
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Re: Ohisofly’s 91 Si project – 700hp or bust
If you spray paint the valve cover, you can use the VHT wrinkle paint and it will hide small imperfections. I have also successfully used a high temp engine paint over the top of black VHT wrinkle paint if you want a color other than red or black. If you do go with a wrinkle paint, spray it and don't touch it for 1-2 days. It takes a long time to fully dry, and you'll think it's dry, but you'll ruin it. Ask me how I know.
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Re: Ohisofly’s 91 Si project – 700hp or bust
Originally Posted by DaX
(Post 51819602)
If you spray paint the valve cover, you can use the VHT wrinkle paint and it will hide small imperfections. I have also successfully used a high temp engine paint over the top of black VHT wrinkle paint if you want a color other than red or black. If you do go with a wrinkle paint, spray it and don't touch it for 1-2 days. It takes a long time to fully dry, and you'll think it's dry, but you'll ruin it. Ask me how I know.
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