H22A7 ATR inlet manifold + Hondata S300 + 68mm TB

louckie · Post by **louckie** » Sat Jan 06, 2018 4:53 pm

Evening I’m not being lazy. I would just like direct answers ideally as it’s not all that clear this H series merlarkie as I have searched

Right I’m running a H22A7 on a standard inlet manifold, I have purchased an ATR inlet however I run into the dilemma of what injectors, I personally didn’t carry out the conversion and found myself asking how they’ve managed to run an ATR lump on standard inlet....

Honda infact fitted the engine for the previous owner.

So if it’s running a standard inlet my guess would be that it still has a standard loom, this meaning ATR injectors won’t plug and play?? So I may aswell upgrate right ?

EGR

I intend to purchase a S300 so can I just plate over the EGR or weld the port in the manifold without a serious headache?

What do I need to purchase other than the injectors and throttle cable support that won’t swap over from the standard inlet ?

Thanks in advance guys

89 UKDM BA4 4WS (resto job!) · Post by **wurlycorner** » Sat Jan 06, 2018 5:51 pm

Since you are looking to fit an ATR manifold to an ATR engine, you shouldn't need to do all the mods that prelude owners normally have to do. However, as it's in a prelude, you would still have to do a couple of them I think;
Step 4 and 5 on below
http://roskoracing.com/TechBlog/?p=87

The inlet isn't the only reason affecting wiring loom on the engine - all the ancillaries on an A7 would normally be a different OBD, plus the crank sensor is in a different place.
Whoever fitted the engine would have had two options - swap all ancillaries and loom from the old engine onto the A7, or use an A7 loom on the new engine.
Without seeing the car, no idea what they have done.

If you can post pics of the existing connectors on the injectors, distributor, alternator, then we should be able to help you identify what is currently fitted and where to go from there.

89 UKDM BA4 4WS (resto job!) · Post by **wurlycorner** » Sat Jan 06, 2018 5:59 pm

Actually, just realised...
You have a 5g not a 4g, so ATR would be the same OBD. The only key differences on the engine loom that I can think of, being the crank position sensor location and the ATR uses a different EGR valve (might have the same connector though? In which case why would you remove the egr on the ATR manifold? Just leave it on and plug it in? )

I think that the ATR and 5g injectors would use the same connectors?

Sailor you have both cars sat outside your house

can you confirm?

YouTube · Post by **Sailor** » Sat Jan 06, 2018 8:46 pm

wurlycorner wrote:The only key differences on the engine loom that I can think of, being the crank position sensor location

I think you can see evidence of which one you've got by looking at the connector to the distributor.

wurlycorner wrote:.. and the ATR uses a different EGR valve (might have the same connector though? In which case why would you remove the egr on the ATR manifold? Just leave it on and plug it in? )

I think that the ATR and 5g injectors would use the same connectors?

@Sailor you have both cars sat outside your house can you confirm?

I'll try to remember to have a look tomorrow.

(Writes note to self ...)

106pete · Post by **106pete** » Sat Jan 06, 2018 10:18 pm

If you run the prelude injectors you need to port the manifold around the injector nozzle as they have a wider spray pattern

YouTube · Post by **Sailor** » Sun Jan 07, 2018 3:44 pm

Here are some pictures of the connectors. I hope they help.

Layout on our ATR (H22A7)

Layout on our 5G (H22A5)

Denso connector on A7

Denso connector on A5

A7 distributor connector

A5 distributor connector

89 UKDM BA4 4WS (resto job!) · Post by **wurlycorner** » Sun Jan 07, 2018 5:08 pm

Plus rep there sailor
Though... Pics of the injectors?

TPS is the same then
Looks like egr valve is different connector
Distributor definitely different, as expected - A5 has more pin-outs (I suspect due to having the tdc sensor built in where a7 doesn't)

Louckie? How do they compare to yours?

YouTube · Post by **Sailor** » Wed Jan 10, 2018 1:27 pm

I'm not very good at this stuff - it took me ages to remove the plastic cover from the Prelude without fearing it would snap.
Both cars have their injector connectors well covered in tape and although I had a few minutes to look, I didn't have time to re-bind them. This means that I couldn't check the number or colours of the cables. However, the connector bodies look the same to me.

My next port of call was to look up the part numbers. Fail: the CD with the ATR manual on has corrupted. Perhaps louckie could ask a Honda main dealer for these?

sol-lude · Post by **sol-lude** » Wed Jan 10, 2018 1:44 pm

I'll see if I cant have a look at the ATR plugs but the ATR is rightly OBD2. If you are looking to run the ATR injectors you shouldn't have any issues as you have the 5th gen (OBD2).
From what I can tell running the H22a7 the injectors should just be a plug and play task.

louckie · Post by **louckie** » Fri Jan 12, 2018 10:51 am

After some reading im debating S2000 injectors.......

apparently they have the same nozzle design.