built mini me... redline and revlimiter??

[theB16tegguy]

Okay here are the mods:

balanced crank, shot peened rods, new bearings, new rod and main bolts, D16a6 pistons, surfaced block, surfaced head(y8), and stock head with stage 1 crower cam and new honda head bolts.

Thanks, I'm really concerned that if I take it over the stock redline that I might float? does anyone know where this head stops making power and starts to float? please, this kind of help is greatly appreciated.

 

[SolLess16]

i wouldnt take it much over 7200 untill your build your head

 

[MikeBergy]

Floating happens when the valve spring stiffness is not high enough to snap the valve shut in time with the turning crank and cams. Valves tend to start getting slammed by upward moving pistons when you rev too high. This WILL happen regardless of how much power you could make at high rpms.It is a physical limitation of the valve spring. If you want to understand how the spring stiffness is related to how fast your motor is turning, as well as how aggressive your cam profile can be, some physics classes will help immensely. Not trying to make your question sound stupid, but physics is how a motor is defined, it's all about physics. With a stage 1 cam, you're not looking to increase your horsepower too much in the higher rpm range. This site has a reference section for cams and what power you can expect. Please excuse the lengthy reply.

 

[theB16tegguy]

I know what a floating valve is and what it does and etc...etc... I just wanted to hear from people who might know where I should have my revlimiter set at. So far it's at 7500rpm's. I highly doubt that it will float there and was wondering where it would possibly start to float. the block can probably withstand 8000 rpm + but I bet the head won't like me reving that high. Thanks for your input though.

 

[MikeBergy]

Yeah, you're right, with the stock head, the stock redline will probably best. no matter what you've done to the block, you won't like it after you bend a valve and have rip that head apart, especially with the work you have just done. Just get some high perf valve springs, and revving it won't be an issue on the top end. Realistically you won't be making more power up top w/o upgrading to a better cam and tuning, so revving that high is a moot point. just my .02

Short story... keep your redline stock, revving it higher won't make a difference

 

[theB16tegguy]

cool, thanks

 

[Tonyd0821]

out of curiosity...

are you able to take out stock gsr's with ur mini-me?
or something thereabouts?

 

[Tonyd0821]

hmm just to clarify....

what is the potential of the mini-me setup? is pretty much the gist of my last question.... n/a of course

 

[theB16tegguy]

Well, potential is just slightly less than that of a dual cam. partly due to the fact that you can't advace or retard both exhaust and intake seperatly. Theres lots of potential, especcially with $$$ which I don't have. I'm thinking or I'm at least hoping I can run a 15.0 or lower with my setup. But I'll never know until I run it at the track. I've seen an all motor mini me at the track hit high 11's so theres proof in the pudding.

 

[h22bubbleback]

my boy has a mini me in a 4-door civ puttin up 13's -14's

 

[theB16tegguy]

really.... what's done to it?? I'm very curious.

 

[89_starter]

My instructor told us that a d serious crank cam swing at 8000 RPM with no swaet because its well balnace from the factory and it only weighs 33 pounds I think the one on a d15 only weighs 28.

 

[BseriesKllR]

Well i have a 89 CRX HF with a D16Z6....Its got Milled head .035, Port&Polish, Zex stage 2 cam, 4-2-1 Header, Ls Throttle Body, Ls Injectors, Intake, exhaust, Skunk2 CamGear, NGK plug wires.....Runnin a PG7 ecu right now (rev limiter 7500) and im shifting like right before the rev limiter no problems. Car can easily take GSR's.

 

[theB16tegguy]

sweet,... any time's?

 

[littlehatch]

yeah ok i have to jump on too lol. i have a 92 dx hb and i was thinking about doing a mini me for some time and i wanted to know the saem things lol.

what kind of power is there? is it really worth putting the money into?

i think it would be awesome to hit 13's with a sohc!! lol

oh yeah that reminds me......would the d15b7 bottom with the d16z6 or y8 head make more power than the d16z6 or y8 motor it self? what power would it be stock wiht the head on the d15b7 bottom?

thanks

 

[theB16tegguy]

it makes the same power due to the flat top pistons in the d15 blocks. There are dished pistons in the d16's.

 

[89_starter]

Originally posted by BseriesKllR@Nov 28 2003, 10:49 PM
Well i have a 89 CRX HF with a D16Z6....Its got Milled head .035, Port&Polish, Zex stage 2 cam, 4-2-1 Header, Ls Throttle Body, Ls Injectors, Intake, exhaust, Skunk2 CamGear, NGK plug wires.....Runnin a PG7 ecu right now (rev limiter 7500) and im shifting like right before the rev limiter no problems. Car can easily take GSR's.

HEy when you say "ls" do you mean 89 teg LS or the newer LS?

 

[BseriesKllR]

from 91 LS

 

[AlphaCivic]

Judging by the fact that you have no head work done, i wouldn't rev over stock. Besides, those mild cames you have wont make much if any power over stock redline anyways, so why risk it?