Anybody pulled their head?

[Sideways]

I'm about to pull mine. I have a new head and intake to install and was wondering if it is possible to install the head with the intake already mounted to limit some of the bending over. Anyone with experience in this area? Thanks and my back thanks you too. :D

[Greg Stevens]

I don't see any reason why you wouldn't be able to pull the head and intake off at the same time. The manual says you 'should,' but that doesn't mean that it's a requirement. You are disconnecting all the hoses and various gizmos anyhow whether or not you take the intake out at the same time or not.

The only thing that I can think of would be that the weight or both pieces together would be pretty heavy. But you and your back have probably already thought of that, yes? ;)

Do you have the manual? PM if you don't and I can help you out.

But I haven't removed the head. I have done just about everything else, so this is an educated guess. One thing I would do would be to remove the hood entirely. It would be nice to raise the car a little bit too. Part of the problem with working on an S2000's engine is how low the whole thing is. That may help you, and your back, get through the process.

What are your plans with a new head? Are you putting a Hondata gasket on the intake side? And you probably know you can reuse the exhaust manifold gasket without any problems. But what are you planning on doing and what's the new head all about?

Oh, and welcome, my friend...this is your virgin post. Hopefully you'll be hanging out here and becoming something of a slut. ;) (As long as you're not a whote, we're cool!)

:lol3:

[Sideways]

What are your plans with a new head?
Ported and polished, oversized valves, ti retainers, etc. It's an Alaniz head.

Are you putting a Hondata gasket on the intake side?
Yes.

(As long as you're not a whote, we're cool!) :confused:

[Greg Stevens]

Originally posted by Sideways
What are your plans with a new head?
Ported and polished, oversized valves, ti retainers, etc. It's an Alaniz head.

Are you putting a Hondata gasket on the intake side?
Yes.

(As long as you're not a whote, we're cool!) :confused:

Sorry, bad joke...my apologies. :) Oops, I misspelled whore, not whote - I was referencing a phenomenon that seems to be popular in some internet forums.

Any ideas on what kinds of improvements this is going to make? Must be theoretical, but I'm sure many would love to know what you are expecting.

I saw the picture that you posted in the photo gallery...I'll take the liberty of posting it for you. If you don't mind, here it is...

http://www.s2kca.com/photopost/data/500/790Dsc00023-med.jpg

For the larger, higher rez shot, try this link (http://www.s2kca.com/photopost/data/500/790Dsc00023.jpg).

Also, have you given any thought to indexing the spark plugs? It's an old trick that we used to do on V8's, which some argue, has a better burn rate. Some don't believe it, but some some swear by it. Any thoughts on the subject?

[Sideways]

Any ideas on what kinds of improvements this is going to make? Must be theoretical, but I'm sure many would love to know what you are expecting.

We flowed it and picked up about 17 CFM on the exhaust at 0.400 lift. The intake was only about 8 CFM at 0.450 lift. Both increase with more lift. I expect about 4 or 5% HP gain but built the head for a supercharger so we spent most of the effort on the exhaust side and used SS valves. Between the valves being lighter and the ti retainers we lowered the mass of the valve/locks/retainer by 10%

Also, have you given any thought to indexing the spark plugs? It's an old trick that we used to do on V8's, which some argue, has a better burn rate. Some don't believe it, but some some swear by it. Any thoughts on the subject?

I spent some time with indexing (notice the red plug tips) and the factory head is not indexed. It does not appear to make any power that can be measured. The change in cylinder volume from spacing the plugs probably outweighs the gains that might be seen.

The valves can not be larger without increasing the bore.

I can post a few more pictures if you want but please don't call me a whore for using up all the space.

:LOL:

[Greg Stevens]

Well, I promise not to call you a whore, even if you are one... :lol3: You have 10mb of storage in the gallery, so get to it! :D

Those are so good numbers, expecially on the exhaust side.


Porting and polishing is all by machine on this engine. Like you know the ITR engine is hand ported/polished. But that must be what accounts for the lower numbers...eh?

But what else are you doing to the engine? Did you tighten up the bottom end, as well? Lower the compression? Sounds like this is quite the project for you...would love to know more details if you care to share!

As far as indexing, it seems that only certain head configurations respond to that favorably. It makes sense in the way some heads are, but some heads are not effected by indexing.

Looks great...post more pics! :brew:

[Sideways]

Originally posted by Greg Stevens
Porting and polishing is all by machine on this engine. Like you know the ITR engine is hand ported/polished. But that must be what accounts for the lower numbers...eh?

But what else are you doing to the engine? Did you tighten up the bottom end, as well? Lower the compression? Sounds like this is quite the project for you...would love to know more details if you care to share!

Looks great...post more pics! :brew:

Planning a stock bottom end....love the technology they utilize.
Currently: not in too big of a hurry to change anything because it is putting out 241 hp on a dynopak the way I have it set up!
Next: Head, intake, Proflow
After that: Vortech, gauges, V-AFC
Down the road: CF intake, Ti exhaust. :shocked:

http://www.s2kca.com/photopost/data/500/790Dsc00021-med.jpg

[Sideways]

It's on and I will have the dyno results in a couple of weeks. My butt dyno says it seems to run stronger.

[Rowland]

Sideways,
Welcome to the board!:hi: Sorry I did not get to you sooner but I have been away on a business trip and just got back. Really glad to see you post about your engine project.

I think a few of us would not mind if you would write up a small article on your experience and some of the differences between other projects of the like and the S2000 experience. I would not mind seeing more pictures, I think it is great to read and see what is going on.

We look forward to see and read about the rest of your projects on your car. Please do not worry about bandwidth, I am sure we can get you some extra if you need it, and if that is not possible, which I am sure it is, I will post/host them since I have not used any. The important thing is to see the inner workings of engine.

[Sideways]

http://www.s2kca.com/photopost/showphoto.php?photo=1493&size=big&password=&sort=1&cat=500

I am at my limit on the pictures and pulled some to post this. The intake took weeks to polish and the head just a couple of evenings since I only did the end of it. It should look good with a Vortech and some Rick's pullies. :D

[Sideways]

We increased the combustion chamber volumes from 53.4cc +/- up to 56.0cc This effectively decreased the compression ration from 11:1 down to 10.5:1. Even with this decrease in compression it picked up 3 or 4 hp with the factory intake and exhaust. The dyno showed it running leaner thru the entire rpm range. Gains in Vtec showed it flowed better top end adding 4 hp from 7000rpm up to the top. We will be doing a write-up shortly. With this lowered compression ratio I should be able to run 8 or 9 lb of boost with no difficulty.

My apologies to Steve for mucking with the beautiful Honda engine but I am having so much fun. :D

[Prolene]

Any engine management system to take advantage of the greater flow efficiency? Will the Mugen ecu compensate?

Looks good so far and with the SC, it should be a screamer!

[Sideways]

Prolene, I just stuck the Mugen ECU back in to see if it still pings on 91 with the lower compression ratio. I would think the Mugen ECU would actually help higher compression more than lower compression but that remains to be seen. In the old days we used to advance the hell out of the lower compression engines.

[Sideways]

It's all back together. Yesterday, it pulled 362hp on a Dynopak dyno on 91 octane pump gas. All this and only 7 lbs of boost. :clap: I did go with the AEM EMS and with a few further (and minor) changes we expect to see well over 400hp. The best part is the car is very, very smooth. With over 213 ft lbs of torque, this thing is just amazing. I outpulled a Ferrari 360 Spyder on this dyno and the S weighs considerably less too. :brew:

[dlq04]

Damn impressive numbers! Well done.

[vapors2k]

Originally posted by dlq04
Damn impressive numbers! Well done.

indeed, can't wait for an update.