bore it out??

[Experimental_Honda]

ok if i got my head ported, bore my block out 30 over, with new pistons, rods, destroke my motor, and get a new thiner headgasket. how much power would i get? a good 45 or so??

[markmdz89hatch]

I'm pretty sure that carotman and sean will not suggest any bore over a .20 over. Because the a20 is cast iron, they were made with relatively thin walls due to the strength of cast iron.

....don't know really though... let's hear from someone who knows what they're talking about.. ...not me...

[Mike's89AccordLX]

Originally posted by markmdz89hatch
I'm pretty sure that carotman and sean will not suggest any bore over a .20 over. Because the a20 is cast iron, they were made with relatively thin walls due to the strength of cast iron.

Yeah they are cast iron. Some guy tried telling me that my 3G had an alluminum block. I was like nooo.... go sit in the corner and find someone else.

[Experimental_Honda]

so if i do it 30 over it might fuck my block up?

[maka_RTH]

i'm not sure..., but i remember sean saying that he has chopped up a few blocks, and knows where all the waterlines and stuff is, so i'm sure he'd know how much you could bore it out

[Experimental_Honda]

ok

[dXsquared]

and destroking will give less power...

get 10.5:1 pistons, p&p and bore .20 over... get a cam and a WEBER and then it will haul!

Travis

[87AccordsterLx]

or you could buy a car thats generally faster... ? Hmm.. theres an idea. Probably wouldnt be a cool as the 3g but Im keeping my 3g when I get the supra.

[Experimental_Honda]

i was going to destroke for tq, yeah i did thats why i got the 95 lx put its torn apart im in the middle of a full rebuild cuz it sat for like 1 1/2 years and the motor is really gunked up.

[AccordEpicenter]

Dude i was lookin in the Honda factory service manual and you can go .30 over but nothing more than that.

[Experimental_Honda]

hell yeah, 30 over should make it fly with the new rods and pistons.

[Jims 86LXI HB]

Originally posted by Experimental_Honda
hell yeah, 30 over should make it fly with the new rods and pistons.

Ya know, the topic has been discussed before and when I asked just how much more displacement a .30 overbore would net, I was told 50cc's to 75cc's. For the sake of argument let's say you raised the level of horse power before the overbore to 170hp at the crank. That would equal's 85hp per liter or 8.5hp per 100cc's.
50cc's to 75cc's would net you 4.25hp to 6.4hp Unless you were able to do something different just because of the wider bore.

Even if you triple the math and say you can gain 12hp to 18hp, is it worth the cost?

[BLck89accord]

very good point Jim, given that your calc's are in the area of being right. The cost for that little of a gain is a bit anal, and not worth it to me, unless i had PLENTY of cash to throw away.

R©

[dXsquared]

just pistons and cam will give alot of power... i dont think the P&P and bore will be that signifigant...

Travis

[AccordEpicenter]

Besides the stuff DXHATCHBACk is sayin I think the stock internals are pretty good except your going the turbo route and you prolly wouldnt gain much overboring and what not... I swear the intake manifolds limit these engines more than anything, have you ever looked inside one?

[AvgWhtMale]

30 over is 0.03 inches, not .3. You're talking thousandths of inches here, as in "30 thousandths." Typical overbore is 0.04", or about 1 mm. It would give you about 90 more cc (less than .1 L). 0.03 would give about 60 more cc. Long strokes give more torque, not less. The only benefit to destroking (he he, "stroking") I can think of is that you increase the rod/stroke ratio, meaning the engine can rev higher before tearing itself apart. So if you are going for real high-end power, maybe it's a good idea, but you lose displacement in the process. As mentioned, 0.03 overbore does not make up for much of the displacement loss.

CAI + bored TB + headers + 2.25 exhaust + cam = go faster

[Experimental_Honda]

i am carbed i cant do a cai........

[AvgWhtMale]

Ah... then a webber

[buzzbomber88lx]

porting the stock intake maniflod will give you way more flow over stock! have you ever taken the stock a20 intake and looked at the ports???WAY TINY!! port them beotches out and buy a weber, if you want a little more torque...get a carb spacer. You can custom put a cai on a carb. just look it up in search. and get a header etc. if you dont already have one. just my .02. boring isnt worth the dough. stroking(lol) is what makes you get more power. get a bigger crank etc.
-Ryan

[Experimental_Honda]

cool thanks im still trying to sell my accord and get a 95 accord lx from my mom. but in the mean time i just wanna get the thing moving a bit faster than it does.

[cspeed]

im going to open this post up because i searched and no answer, does anyone make a stroker kit for the a20? or can anyone forward me to places to buy the parts individually?

thanks
brendan

[bobafett]

nobody makes one. i cannot promise you that they dont. but i am 99.999999999% sure that nobody offers any sort of "kit" for our engines other than an OEM rebuild, or the GUDE racing package...

[Jims 86LXI HB]

Stroking was discussed on a previous message board of ours. In the end it would only get you to 2.1L if I recall correctly. This is due to either clearance issue's or donor cranks don't exist with sufficient extended throw.

Trying to increase your engine's displacement really isn't a viable option. Focus your attention on other means to get power, all motor, turbo or do a engine swap as discussed in threads labeled, "important" in the engine swap section.

I'd love to see someone bump the compression a bit, port and polish, somewhat aggressive cam grind, true CAI, and all the other stuff that belongs on a all motor.

[Sean]

a safe over bore for performance use is 0.030 for every day driver you could go 0.050. then again with a sonic check you might be able to safely bore more. ive seen some fairly large variations in castings so the best way to know for sure is to have it sonic checked. on the other had the max overbore that will safely tolerate greater cylinder pressures will stil be roughly 0.030 the good part si being the blokc is cast iron you dont have to buy sleevs or any of that other bullshit to do the job.

and Jim hold on i think me and somebody else are gonna team up and build a N/A motor full tilt sometime soon. now that i have a good efi system i can program you might be shocked what comes out of the garage in the next year or so. dammit when are you getting another 3g ?

[guaynabo89]

Send one of those ecu's my way and we'll see what an all motor a20 will do!