z1 head
 

ill be using the z1 head with the z6 block (vitara+tt rods) and a cosmetic hg to lower the comp. even more. question, how high can you rev the z1 head with stock valve train ?? and also is this a good idea ??

Re: z1 head
 

What's the stock redline on a z1 motor? That's usually a pretty good indication of how high you can spin your motor ;) Rpm's are generally limited to whatever the valvetrain can safely handle with honda motors. Usually the bottoms are balanced pretty well, and I've seen plenty of stock z6 bottoms that will take 8k on a daily basis. Again, it all depends on the head.

Re: z1 head
 

Keep in mind......reving past 8k is cool but it doesn't mean you'll make power past that. Run it on a dyno. I've only seen a few D series making good power past 8k.

Re: z1 head
 

haha so like 6200 rpm ? b/c im reving my y7 to 7k w/o any problems YET.

Re: z1 head
 

the stock valve train will be able to handle a bit more then what is restricted for them. But it doesn't mean the motor is still making power. Only a dyno will show you peak power through the rpms and the limits of you motor. You can take a redline of 6.2 and rev that motor to 8.9 no problem.....but all you need is one valve to float or miss....then click click click. Keep it safe at a safe rpm...then dyno it.

Re: z1 head
 

That's pretty much what I meant in my first statement. Just like my b16...just cause I can rev it to 8200 doesn't mean it makes power up there :-\ Hell, one of my friend's turns his d15b2/y8 head motor to 8k on a daily basis, but his power production dies off pretty much after 7500. Put it on the dyno, find out where peak power is made. Then look at where the next shift leaves you at power-wise. Most people I know only spin their motors past peak power range a little bit to give them a jump start on the power band in the next gear.

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have you seen the tiny ports on athe VETC-E head?

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VETC-E [sic] redline is 5500.

It's the VETC powerhouse of the CX family!

Re: z1 head
 

The vtec-e is well junk


I studied that damn thing tryin to see if I could transfer over some of the parts but its really a paper weight

+
Its good for the valve cover and solenoid


get yourself a z6 head and make 30+ more hp and have a powerband to 7200+

Re: z1 head
 

Junk?

If this is the summer of $3/gal gasoline, I want my 50+ mpg. I have a Z1 sitting downstairs I plan to freshen up and use for the next beater.

Re: z1 head
 

good point, no power potential there, PERIOD.

its actually 6000rpm but same thing i guess ::)


one thing i do want to point out is compression ratio, check out the combustion chamber volume on the z1 head, i havent done the calculation w/ your setup, but i can assure you its gonna take a HUGE head gasket to get compression anywhere near driveable, and still make less power than a worn out z6 head. like said, its a paperweight, boat anchor, whatever, no good for anything. well, MPG, thats it, but it takes more than the head to get the mileage up to par w/ a vx.

Re: z1 head
 

mpg its the ----


performance its ----

Re: z1 head
 

i looks it up and it looks like i would need a .054 head gasket to get my compression down to 8.8 or something. im to lazy to do it again.

well i guess i need a z6 head now.

Re: z1 head
 

I've got a z6 head you can come pick up free.

Re: z1 head
 

Re: z1 head
 

ill pay you to package it and s&h

Re: z1 head
 

I'd hotrex you. I can't remember anything long enough to follow it through to the end.

If the guy who helped me ship my ebay sales for 10% hadn't gone off to school I'd say yes and just give the money to him, but... :'( I feel like an ass even mentioning it.

Re: z1 head
 

Re: z1 head
 

You can lock it in VTEC mechanically.

Re: z1 head
 

yeah, i didnt even think about that, still not worth it at all. and i dont think his compression calculations are right either.

Re: z1 head
 

I have a friend shooting for 600 whp with a free B17 (B16) head that wouldn't go into VTEC reliably. We locked it in VTEC, and do not care. For a z1 build I'd keep VTEC and milk the 1.9 million mpg.

z1gay, you're wound awful tight over this subject. Rent some time with your sister + relax. :6

Re: z1 head
 

yeah, im having a pretty shitty month, my mom passed unexpectedly on the 5th of this month, and im next of kin, so i had to do all the arrangements and stuff, so i have been a little on edge. SORRY to anyone i affended or whatever.

as for the compression ratio, i did just check it out and even w/ a stock y8 head gasket and vitaras compression is near 9.5:1, because the vitaras shorter compresed height. i still would tell anyone its a good idea to use one for anything.

my z1 was getting 40+mpg 100% city driving w/ crossover at 2400rpm and running really rich, EGR blocked off, and no closed loop. so gas mileage is pretty nice even once modded, but there is nothing you can do to make it quick (i didnt say fast). point is, dont mess w/ the z1 if you care about performance.

Re: z1 head
 

This is HMT, if anyone's panties are in a wad no one cares. Unless it's an excuse to flame someone, but then they don't really care.

My mom's got cancer, so I know it's coming. I expect to be a huge assmallet and have no intention of apologising when the time comes.

BTW, massive EGR + ignition advance = more mpg.

Re: z1 head
 

lets all get vx and hf heads

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cx here, time to try something new.

Re: z1 head
 

my panties arent in a wad anymore dickwad, im fine now, and i garentee you once your mom is gone you will sing a differant song.

BTW: NO EGR+ low timing+ open loop+ 12.5:1 a/f = less MPG. thanks for the lesson though.

Re: z1 head
 

I tuned the beater for 16.5:1 part throttle and 13.9:1 WOT open loop. It's a sissy motor, no load, no need for super rich AFR. I get 38 mpg with AC off on highway cruise, loaded down with swill.

Re: z1 head
 

damn, you should be doing better than that on MPG, mine was hybrid trans too, ex FD, so i was always revved, but when i did the gear swap mileage only dropped 1-2 on average, i think the 4.00 FD would be ideal for an upgrade from a cx/vx trans, but still get the same mileage, its my theory that the crap vx final drive hurts MPG in city driving, no doubt its better on the highway, but too much throttle input is needed to get around town. oh, and i forgot to mention, before i blocked the EGR, went open loop and chipped ecu my VX completely stock was getting 28mpg 100% highway driving, talk about some kind of shittened.

Re: z1 head
 

thats terrible


I got my old zc to get around 35 mph freeway

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You do understand the car in question has axles that ratchet loud enough to turn heads when I'm driving through town, and that it's always loaded down like a pack mule? 400 lbs of useless ----, easy.

Re: z1 head
 

wow, we jacked this thread. i guess thats descent mileage, hell i dont even know what kind of car we are talking about.

Re: z1 head
 

lol, its cool. i guess im gonna go with the z6 head.

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---- that, B6 head FTW!111

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no way, b8 head FTW. its a monster. ::)

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I'd buy those z1 heads from you guys for 10 + actual shipping, as long as they are in proper running condition. You could make 10 bucks! Let me know if you've got one. I like them. I collect them like trading cards!

Seriously though, i'll buy your paperweights.
AMkrew_1@yahoo.com
-josh-

Re: z1 head
 

i threw away 2 of them before l left

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35 hours, 1206 miles, 29.4 gallons, 41 mpg beating the piss out of my car thru the mountains at 75-100 mph.

Only got 4 hours sleep last night at JD's and I still can't fall to sleep!

700 miles in 13 hours today, minus time waiting on idiot to get money out of ATM and picking up parts.

Road Dawgin, what I do best :)

PS: ---- damn southern states that won't sell beer on Sundays!

Re: z1 head
 

no beer on Sundays ?? wtf ???

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wut u can have beer on sundays? no fair

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bible belt = kill biblers