Should we call it the US Atom 3.25?

[McFred]

The wheels can't be Dymags;they are out of business. Maybe they are sourced from Sector 111? The BP for Brammo Atoms was 4x100...I think this was unique and may have returned to the UK standard BP when TMI started building them in '09.

I know that if I had that bastard 95.25mm pitch I'd see about redrilling the hub flanges for 4x100 posthaste. It's hard enough to find affordable 8-10" wide DOT rims with the 4x100mm.

...but the K24z7 only has intake vtec... not really a flaw.. it's only a flaw if you're a civic ricer and just bought a new TSX and all you care about is racing mini vans and bragging about your Vtec!.. our cars are so light, it doesn't really change much... "faster" really isn't needed.. this isn't a 0-60 in 16 seconds civic.

As for the K24. If it were the 2.4l K24A2 from the TSX instead of the Z7 I'd be much happier to own one. But eliminating the extra cam lobe on the exhaust rockers and using the single-port, integrated exhaust manifold on the head is a design compromise. It's made for simplicity and packaging but after that it's not that great for power. You can always force-feed the intake to make it work though.

I don't mind being called a Civic Ricer nor do I mind revving the engine at minivans at red lights, the kids in the back seat get a kick out of it. I like to know that if I put some cams in my Atom 245 that I will get better power and torque that might overcome some of the horrible drag these cars have past 110 mph on the track. I'd like to have the best cylinder head available for the job which is NOT the K24Z7's. I do know that TMI and Ariel have only what's available to work with and Honda keep changing things, so you get what you get. The 2.4l's a step forward even if the head's a step back.

[rijowysock]

I know that if I had that bastard 95.25mm pitch I'd see about redrilling the hub flanges for 4x100 posthaste. It's hard enough to find affordable 8-10" wide DOT rims with the 4x100mm.


As for the K24. If it were the 2.4l K24A2 from the TSX instead of the Z7 I'd be much happier to own one. But eliminating the extra cam lobe on the exhaust rockers and using the single-port, integrated exhaust manifold on the head is a design compromise. It's made for simplicity and packaging but after that it's not that great for power. You can always force-feed the intake to make it work though.

I don't mind being called a Civic Ricer nor do I mind revving the engine at minivans at red lights, the kids in the back seat get a kick out of it. I like to know that if I put some cams in my Atom 245 that I will get better power and torque that might overcome some of the horrible drag these cars have past 110 mph on the track. I'd like to have the best cylinder head available for the job which is NOT the K24Z7's. I do know that TMI and Ariel have only what's available to work with and Honda keep changing things, so you get what you get. The 2.4l's a step forward even if the head's a step back.

i think a lot of people are negative on the z7, but if you look online.. people are doing a lot of great things with it.... it's just like anything else new.. people will stick to their guns and criticize the new thing.. i was worried but i love the z7.. the integrated header actually heats the engine up quicker in my experience and again researching online.. some really awesome things have been done on z7 lately and people starting to eat their words previously said.. i do admire the k20a... it's awesome just like the f20c was in the s2000.. but my days of rowing a boat of a gear box are over.. i prefer torque and comfort of the z7 anyday..

[rijowysock]

Hmmmm I wonder if any of the items mentioned would end up on my car? Can't wait to see it on Friday!!

pretty sure you have the steering wheel (as do i, it's amazing).. not sure if bwy has it (yellow strip at top), form fitted grips...

the dash is not in cars yet, frames are same still, might have dead pedal but i doubt it... the shift knob should be same... and i'm sure you ordered wilwoods, so i think that crosses everything off the list..

the improvements are good for the car, but all together aren't anything "Crazy".. id say the dash is the biggest change... the rest are just options..

if they can, i would pay money for them to dead pedal it before it arrives... i seriously lost 3 years of my life contorting my body to add it.

[McFred]

i think a lot of people are negative on the z7, but if you look online.. people are doing a lot of great things with it.... it's just like anything else new.. people will stick to their guns and criticize the new thing.. i was worried but i love the z7.. the integrated header actually heats the engine up quicker in my experience and again researching online.. some really awesome things have been done on z7 lately and people starting to eat their words previously said.. i do admire the k20a... it's awesome just like the f20c was in the s2000.. but my days of rowing a boat of a gear box are over.. i prefer torque and comfort of the z7 anyday..

This is my TSX K24 with more compression, basic shelf cams and 4-2-1 header tuned on the PRC and RBB intake manifolds. Very easy build and nothing special for that platform:
PRC 264whp 198wtq SAE
RBB 258whp 209wtq SAE
http://i31.tinypic.com/a3koc1.gif
Payne posted a Dyno of his 'traditional' 3-lobe iVTEC K24's AA3 roller that's not too different IIRC.

My google search's coming up with some mediocre/weak dynos for the K24Z4:
http://i31.photobucket.com/albums/c3...typeheader.jpg
http://i.imgur.com/kmB4u.png
http://9thcivic.com/gallery/albums/p...vs_reflash.gif
http://www.9thgencivic.com/forum/att...-pdyno1600.jpg
http://sohc.vtec.net//article_files/.../12si_dyno.gif
http://www.9thgencivic.com/forum/att...pro-img056.jpg
http://www.9thgencivic.com/forum/att...y-capture1.png
http://www.9thgencivic.com/forum/att...ntake-dyno.jpg

I recall seeing the Honda-published pictures of their then-new head and that single port and limited cam profile is contrary to a LOT of consumer and race-only engines with a much higher specific output. I'm not trying to be contary or just critical of some new farkle, but I'll stick to my guns until I see something compelling to convince me otherwise of the Z7's performance potential. I've got no monetary or emotional investment in it either way, just stating opinion. Again whatever shortcomings the Z7 may have will become moot with the addition of the supercharger, when in doubt get a bigger hammer.

[Dbwy]

pretty sure you have the steering wheel (as do i, it's amazing).. not sure if bwy has it (yellow strip at top), form fitted grips...

the dash is not in cars yet, frames are same still, might have dead pedal but i doubt it... the shift knob should be same... and i'm sure you ordered wilwoods, so i think that crosses everything off the list..

the improvements are good for the car, but all together aren't anything "Crazy".. id say the dash is the biggest change... the rest are just options..

if they can, i would pay money for them to dead pedal it before it arrives... i seriously lost 3 years of my life contorting my body to add it.

Yup, I do have the new wheel...I love it!

[Dbwy]

I know that if I had that bastard 95.25mm pitch I'd see about redrilling the hub flanges for 4x100 posthaste. It's hard enough to find affordable 8-10" wide DOT rims with the 4x100mm.


As for the K24. If it were the 2.4l K24A2 from the TSX instead of the Z7 I'd be much happier to own one. But eliminating the extra cam lobe on the exhaust rockers and using the single-port, integrated exhaust manifold on the head is a design compromise. It's made for simplicity and packaging but after that it's not that great for power. You can always force-feed the intake to make it work though.

I don't mind being called a Civic Ricer nor do I mind revving the engine at minivans at red lights, the kids in the back seat get a kick out of it. I like to know that if I put some cams in my Atom 245 that I will get better power and torque that might overcome some of the horrible drag these cars have past 110 mph on the track. I'd like to have the best cylinder head available for the job which is NOT the K24Z7's. I do know that TMI and Ariel have only what's available to work with and Honda keep changing things, so you get what you get. The 2.4l's a step forward even if the head's a step back.

When going through the process of purchasing the Atom, I did a lot of research on the new k24z7. I almost ordered the car with no drive train and was going to have a k20 or k24a built. The main reason for this is the new head design, lack of possible modifications, lower redline, and negative talk on the web. However, after a LOT of research, I obtained a build sheet from Honda Racing Development that specs out a build using the k24z7. Everywhere you read on the web will state there is no available head swap for the k24z7, but this is not the case. I will have to double check the build sheet, but I believe HRD uses the k20a2 head, and they acheive very good numbers with this platform. The head swap eliminates any negatives about the lack of vtec, and the integrated exhaust manifold (which HRD says is a great design for foced injection).

So after learning this, I ordered my car with the k24z7 already installed. I am still debating on adding a sc, or building the top end, but it's nice to know there ARE options.

[silver]

Saw this today from T.M.I.:

the 2.4L supercharger option also provides the highest torque rating to date for any Ariel Atom 3

will it still be less than the ecotec tq.....awwww yiss, stick stick jab jab

just kidding atom bro's, we gotta take what we can get, glad to see they are going to a digital dash, and glad to see they are raising the price.

[McFred]

After talking with TMI I learned that the new "bespoke" wheels are in fact Dymags or at least the exact same thing that are now being produced by whichever company that bought Dymag out of receivership. Just FYI. Oh they're 95.25mm PCD too. There are no plans to make hub flanges that are both 4x100 and 4x95.25.