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.

Re: z1 head
 

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

Re: z1 head
 

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.