ATR cams in H22a2

CrunchyAdams82 · Post by **CrunchyAdams82** » Fri Jul 19, 2013 9:55 am

Split from a different topic [Merlin]

On a similar theme, and the info gathered may be of some use; I'm supposed to be investing in some ATR camshafts at the end of the month for use in a H22A2. I was assuming that they would fit & work ok, but not so sure now.

Can somebody confirm this one way or another? And the reason why they will or will not fit. Thanks

Oh, and are all ATR camshafts the same between the 2.2/2.0/JDM/Euro R?

Post by **Merlin** » Fri Jul 19, 2013 10:12 am

The Lude H22a8, H22a from the Type-S & S-Spec, and ATR H22a7 have the same cams.

ATR cams drop straight into any H22.

CrunchyAdams82 · Post by **CrunchyAdams82** » Fri Jul 19, 2013 10:22 am

That's great. Cheers Mr Merlin.

Post by **NafemanNathan** » Fri Jul 19, 2013 10:26 am

Some say it's worth uprating the valve train to match, which although true I don't believe is essential.

Post by **Merlin** » Fri Jul 19, 2013 10:33 am

I was going to put ATR cams in my old a2 and get it tuned. The only thing that stopped me was that one of the cams had snapped in transit. You need a tunable ECU to get the best out of them.

Post by **Lude-dude** » Fri Jul 19, 2013 11:48 am

I've heard its a good idea to upgrade the LMA's to type r ones

not sure if that's essential

CrunchyAdams82 · Post by **CrunchyAdams82** » Fri Jul 19, 2013 1:00 pm

Lude-dude wrote:I've heard its a good idea to upgrade the LMA's to type r ones

not sure if that's essential

don't think it is essential from what i've read, but just might not get the best out of the cams that's all. this isn't the most important thing for me on this engine, just want to make it slightly better than stock as it's an A2. it's only going to be a 12 month stop-gap engine at any rate, while i build a decent project one.

Merlin wrote:I was going to put ATR cams in my old a2 and get it tuned. The only thing that stopped me was that one of the cams had snapped in transit. You need a tunable ECU to get the best out of them.

can i run these cams on the standard ukdm ecu? i'll most likely be getting a chip from Rob as well. can you see any problems with this? really don't want to invest too much in this engine, other than ancilliaries i can transfer to the project one once ready for installation.

Post by **NafemanNathan** » Fri Jul 19, 2013 1:49 pm

CrunchyAdams82 wrote:can i run these cams on the standard ukdm ecu? i'll most likely be getting a chip from Rob as well. can you see any problems with this? really don't want to invest too much in this engine, other than ancilliaries i can transfer to the project one once ready for installation.

Trouble is the cams allow for more air into the engine, so really you need to allow for more fuel to keep the air/fuel ratio in check. A UKDM ECU with it's set map won't "learn" enough to make that compensation. One of Rob's chips may resolve this as I imagine they up the fuel ratio anyway, but he'd be able to advise further on that.

CrunchyAdams82 · Post by **CrunchyAdams82** » Fri Jul 19, 2013 5:26 pm

What do you think @nucleustylzlude?

Supercharged 無限MUGEN BB1 Profile · Post by **nucleustylzlude** » Fri Jul 19, 2013 11:02 pm

Well it will help a little, but the cams on their own and a chip won't maximise the use of the revised cam lobes, as to what you'd need, no idea??? Personally it's a tunable ECU and get it tuned to the exact setup.

What ECU are you using then for the project - UKDM or JDM ECU? The Spoon chip for the JDM's I've seen better results, but they have the higher compression and more power to begin with.