Lude Generation

Madhatter81 · Post by **Madhatter81** » Wed Jan 16, 2013 7:43 am

Hi guys I've just got a 62 mm throttle body of a ATR
does 2mm really make a difference??
I plan on putting a h22a7 head inc cams on to my h22a2 bottom end
Is there any real point me messing around

Froidas · Post by **Froidas** » Wed Jan 16, 2013 8:04 am

What intake manifold are you going to use? If H22A2 stock, then you will need to port it's inlet to 62 mm.
Either way, 2 mm makes a difference and it definitely won't be too much . You won't get +10 hp or so, but every little helps. Those 212 hp in H22A7 aren't there with no reason.

Buzzonion Vtec · Post by **Buzzonion Vtec** » Wed Jan 16, 2013 8:43 am

With your setup you'll see more benefit from the ATR throttle body than you would with an oversized 70mm aftermarket one

A1ex · Post by **A1ex** » Wed Jan 16, 2013 9:32 am

Madhatter81 wrote:
Hi guys I've just got a 62 mm throttle body of a ATR
does 2mm really make a difference??
I plan on putting a h22a7 head inc cams on to my h22a2 bottom end
Is there any real point me messing around

If you go with the ATR inlet manifold too, and a decent exhaust system and take it to Buzzonion Vtec to do the work you could see 220-230bhp from that setup with a good tune.

Also, in answer to the question does 2mm make a difference, yes it does;

60mm TB has a 2827mm^2 flow area
62mm TB has a 3019mm^2 flow area

which will allow an extra 6.5% of air through, you'll need the extra airflow to ensure it's not restricting the bigger cams as everything will be flowing quicker to produce more power.

Madhatter81 · Post by **Madhatter81** » Fri Jan 18, 2013 12:16 am

Another question this ATR throttle body doesn't have the cold start on the bottom of it do you think it will make a difference ??
How does the ATR cold start work ??

A1ex · Post by **A1ex** » Fri Jan 18, 2013 7:30 am

It needs to be tuned differently on the ecu, I'm running one

Madhatter81 · Post by **Madhatter81** » Fri Jan 18, 2013 7:41 am

Who tuned yours ??
Is it a lot of messing about ??
For the gains!!!

A1ex · Post by **A1ex** » Fri Jan 18, 2013 9:12 am

It was part of a bigger build, wasn't just the TB. The whole build, including a full head rebuild cost 3k parts and labour not including the exhaust.

It was tuned with a Hondata s300 socketed ecu. A lot of work to tune just a TB, I'd put it on as part of a bigger build rather than on its own

Post by **Drax** » Tue Mar 12, 2013 2:29 pm

how about a 70mm skunk2 TB on an ATR inlet, would that work?

Post by **Donald** » Tue Mar 12, 2013 2:35 pm

I would have though the addition of the 70mm TB and ATR inlet would be overkill unless you're upgrading internals too. But then I don't know a lot at all.