what up everyone, I did a search and came up with alot of good info but nothing really specific.

Well Excuse my ignorance but I have always done the DOHC Honda motors. First off I知 talking Turbo power just to make that clear.

Anyway I知 wondering how feasible 250WHP out of a SOHC is? I have done hybrids in the past ETC ETC and just don稚 feel like swapping in my CRX so I would like to just stay single over head cam, because its cheaper and hey the motor is 80 pounds lighter so that痴 is some weight savings right there

Of course I would plan to build the bottom end, but I would really rather not do any head work, maybe some valve springs retainers cause I知 thinking I might get a bit of float at the top with high boost. So some rods, pistons, bearings and a quick hone and my bottom end will be nice and strong. I知 going to stay with the stock compression or maybe even raise it JUST a bit (throttle response is GOOD)

Second, what motor do you think would be the best for this build up? I知 thinking SOHC vtec would probably yield the best results the head on there should flow pretty nice and also I can then convert to OBD1 and use the AEM plug and play to tune. for under 1000 dollars including the motor I could have a very strong and nicely built (built by me) motor. No need for trans, mounts ETC ETC would be a nice money saver and would be kinda cool to tell people they just got beat down by a SOHC

One final question has anyone punched out a SOHC? like bringing it up to a 1.8 liter? Are the walls simply just to thin?


Any help from you SOHC builders would be great. Thanks for reading



[Modified by EneMy X, 11:58 PM 9/22/2002]

 

The best motor for the buildup IMO is the D16A6 with a Z6/Y8 VTEC head. The A6 is a good block with a nice forged crank. My built D16A6 made 188WHP/158tq at 9psi supercharged running horribly rich - about 11.x:1 WOT. I've since straightened out the A/F but haven't dyno'd again.
My motor/head is all D16A6 with Eagle rods, Endyn pistons running 9.6:1 CR. Bored .020" over, ported head, pinned block, kami header, 3" cat, and 3" Thermal system.
An intercooled turbo running 15psi should be able to make 250 WHP.

 

im using the sohc zc, which was the japanese equiv to the a6. I putting on a built d16y7(non vtec) head, which encompasses a turbo cam, new, stronger springs, aluminum valves and possibly roller point rockers(i think thats what they're called). That'll give me a nice lovely high rpm, and with turbo on it and a higher compression, around 10 or 11 to one, i'll have more horses than i know what to do with. Ohh and im also upgrading the block internals with srp pistons and crower rods. Ok from here out is nothing but a recollection on a story which bears minor relevance. I told my work friend today about my plans with my wagon, he said i couldn't pull 400+ hp out of my wagon, he said hes seen spark plugs shoot out of the top of a turboed gsr hood. I asked him if the engine was stock. He said yes. I started laughing and almost pissed my pants. He said it was 20 psi too. Then I really thought i would keel over and die, he said thats what would happen to my engine, and i laughed some more, and told him no, damn fool, with his damn foolish friends

 

I will have 250whp on my d16a6. just wait

 

I'm thinking of building my d15b2. Just looking for the parts to put in, but I'm not trying to go 200+ hp. Just trying to make it strong enough to handle the boost.

 

im going for 450ish hp, but my tranny is 4wd and i'll have to find a way to build that beast up

 

i would also like to know the answer to that question.
what are stock A6 pistons compression at? and does getting forged pistons really help in holding boost or could i just pull out the stock pistons and slap some new rings on?

 

i hear the pistons are pretty good, the rods are weak though, like toothpicks some say, I believe the compression is around 9:1. I have an a6 block chillin' in my garage, and its been overheated twice, haha my mom forgot to put oil in it twice, so i believe 1.8 is possible. I'll take some pics when i get time and i'll post them so you can marvel at the 4 holes

 

Wait do the 1.6 cyls share the same bore size or is its just stroke? or is it the other way around? I do beileve that 1.8 pistons fit in the SOHC dont they? (something I heard once) if so then I guess you could stroke it? Does the 1.8 Crank fit in there? a 1.8 SOHC would be pretty neato. but then if I was going to go through all that trouble and spend that much money I would just go hybrid.


[Modified by EneMy X, 4:11 AM 9/23/2002]

 

the 1.6 bore is about 75mm and the 1.8 is about in the 80's. wont fit maybe if you bore it out. but then the walls will be THIN.

 

try here

http://www.rddyno.com/index.html

 

1.8 liter definitely will never happen just from boring out the cylinders. 40 over on most 1.6 liters only yields about another 40cc. a stroker kit is definitely the answer. is it worth building a stroker / turbo single cam?? i don't think these much in the way of sleepers. if you pop your hood on a built NA motor, there is little that can be told. someone might notice a bigger intake manifold, a cam gear if you cut your cover. but popping your hood with a turbo is shooting yourself in the foot most of the time, not too many (honda's) will want to race you. keep in mind, word travels fast, and soon after you run someone, a lot of people will know what's up with your car. that's why i like having a red crx. they're everywhere!!! and they are almost all beat up! i don't have any rust, but every one of my body panels is a different shade of red.

to the wagon guy: big props for having a wagon. i would love to have one. such a classic lunchbox design. you are going to need to drop more than a few pennies to get that drivetrain to hold together. the center diff likes to self destruct after around (150?? hp) i would think that you are better off building the hell out of the drivetrain first, then launching that thing so hard people will not know what him 'em. ooohhh. that would be fun. happy wagoning.