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13K views 36 replies 5 participants last post by  SilentBob2 
#1 ·
Maybe with it being a little quiet around here you guys might not flame me too much.I'm working on a turbo project with my son in one of those little rice burners. 89 Honda crx with a integra b16 motor swap. We have spent the last couple weeks fighting this turbo kit and finally got it all hooked up and running. Everything seems right, turbo is spinning but we can't make more than 2 lbs with a 7lbs spring in it. The only thing that isn't the same is the 2 inch pipe coming from turbo to intercooler. Kinda messed that piece up. After intercooler to intake was 2.5 and I had extra so I came off turbo with 2.5. What is the chance that two feet of larger pipe is causing me to lose pressure. At a loss with it and being first time doing one has got me stumped. I know. A couple of you here have knowledge I will never have. Could it be as simple as needing to be under a load to get the boost we are looking for?
 
#2 ·
Oh and we haven't drove it yet, just running it in the shop. Just want to make sure everything is right before we drive it. After I know its right we will be taking it to have it tuned on a dyno. This has become one expensive project but fun. Momma did buy me a tig welder and plasma cutter for this project, that's a bonus....
 
#3 ·
Good deal on acquiring the tools! More tools are always good! :D

You're not going to get full pressure until you can hold the throttle wide open for a few seconds, which I hope you're not doing in your shop.

Larger pipe will not cause a loss of pressure. It will cause a delay in reaching a given pressure, because of needing to pressurize a larger pipe volume, but I doubt that you could detect the difference without sophisticated test equipment.

Nice hearing from you, Bob!
 
#4 ·
Not holding full throttle just giving it a short burst and would just barely seen the gauge go from vacuum to the boost. Kinda figured that's what was going on. I've been reading endless posts on Honda forums and it always seems like nobody would give any definite answers. So I was hoping you would chime in on this so I thank you. Had to get the tig welder for the aluminum piping. Had to drive thirty miles either direction to find someone to do it. Thanks again... I will let you know how it works out....
 
#5 ·
Thanks again. We just had a successful test run. Everything seems to be working right. Wastegate is working, blow off valve is working and we are making boost. Definitely needs tuned. Sending the ecu out tomorrow to have set up with hondata software so it can be dyno tuned.
 
#7 · (Edited)
We built a sohc 1.6 for it and took it to the track and it ran a sixteen in the quarter. I made a deal with him last spring and bought a 1.6 doch and limited slip trans for him from hmotors and told him I would take the motor we built for my daily driver that I use to drive to work. By the end of last summer with some ecu changes he was able to run a 14.2. Not bad at all for a 1.6 litre. We put a turbonetics t3/t4 capable of producing 400 hp. It came with a 7, 11, and 15 pound spring. The 15 pounds is suppose to make 150hp. We plan on tunning with the 11 pounds and see were that gets us. It has been fun and a headache.the kit claimed to be for his car with that motor swap and the only thing that boltedup right was the ram horn header. The rest has been a mess.we called several timesand they finally said it was possible we may have received the wrong kit. We are just about done now so all is good.
 
#11 · (Edited)
Update, took it back to the tuner. Made a few pulls on the dyno and was making 203/206 at the wheels. The tuner started making some changes and it jumped up to 239 then 250 and when we went for the next pull the clutch slipped at 264. So looking like we are going to need a better clutch. We are going to change fith gear while we have it out. Running down the bypass at 70 its sitting at 4500 rpm's so we want to tone that down a bit. The tuner was also telling us he can add some servo's to our ecu and give us boost by gear and rpm to put power to the ground evenly. I thought we had to have an expensive electronic boost controller for that but he can do it for about $150. Not bad
 
#13 ·
Yep that's why the tuner said he likes to keep the crx's down around 285 for a driver and said that is pushing it. They are almost a thousand pounds lighter than a normal civic. The motor we swapped in was 175 at the flywheel and running 14's. Guess we will find out Friday night how much it has improved...
 
#14 ·
The guy doing the tuning for us holds several records for fastest naturally aspirated four cylinder and fastest soc four cylinder. YouTube Humble performance and check them out. They have civics making over 700 HP on e85. Pretty cool guys that actually try to help you out and not just take your money and send you down the road. When we had it on the dyno it was popping at high rev, asked what our plug gap was and told us what to change it to so he wouldn't have to charge us. That blew me away when he told me to set the gap at .025. I was like are you sure, he said turbos change everything. He has set them as low as .016/.013.
 
#17 · (Edited)
Thought I would give you guys a little update. After the clutch we ran a 12.9 but wasn't running right. Started getting a lot of blow buy so we tore into and of course the pistons were shot. Put a forged crank eagle rods and arais pistons in, had to bore it.020. Took it back to the tuner Monday and we bumped up to 18 pounds of boost and put down 316 wheel hp. Going to keep it there until we get the ecu set up for the boost by gear/rpm. Going to take it to the track Friday and see what it runs.
 
#19 ·
Well it didn't blow. Gotta buy some slicks for it and get the boost buy gear/rpm set up. He did keep blowing the tires off it from first through third. Couldn't get out of the 13's. Best run last night was 13.3 at 113 mph. Has great top end, just got to make it stick when he launches.we even had the boost control down to 4 pounds and still had to peddal or short shift first and second. He really wanted to see the 12's. The heavier cars running the same mph were in the he 12's and he just couldn't understand why. It stayed together so all is good. Get some slicks and try it again.
 
#20 ·
Just thought I would give a little update. Factory sleeves didn't hold the 18 lbs. Of boost. Blew the head gasket and hydrolocked number one and two. Five inch crack in number one and a chunk out of cylinder number two. Shipped the block to the west coast to Darton to have some iron sleeves put in with the block gaurd built into the sleeves to prevent the cylinders from expanding on compression. Got all winter to get it done and try it again.
 
#21 ·
It amazes me how much effort you've put into getting that thing to go, when you could just swap in a big block Chevy. :D

Just kidding! Although somewhere around here I have a picture of a Honda 600 Coupe with a big block. Remember them? A little air-cooled two-cylinder in a 1100 pound car with a fishbowl rear window.
Tire Automotive parking light Wheel Car Vehicle
 
#22 ·
Yah I know. I've always liked different. I always heard people say why build a sbc when you can put a big block in it. I had several hot rods back in the days and I have to say, none compare to the fun we have had with this little Honda. My last hot rod before the kids came around was an 82 Pontiac grand Prix with a Pontiac 400 big block. Thought that was the best hot rod I ever built till this little crx. Not to mention the G body got about 7mpg and the Honda gets 28 mpg. I think the most important part of the hole thing is it keeps a father and son bond and that is priceless and I hope he can do the same one day.
 
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