Will it work?

[V8KILR]

Okay you guys,

After talking to Mark and doing a little research, I have figued out most of my car. You can see most of it in my signature. There is no 5th injector pre-blower, but there is a plugged spot waiting to be filled there. My question is, if I got the injector to put there, and got E-COOL, or some other form of post-blower injection, will I be able to run them both on 1 Pc-Pro, and will I have to remove the SC to have the intake manifold tapped for the post-blower injector?

[Tom @ Fast Forward]

One E-Cool PC-Pro could drive two injectors simultaneously. They would just wire in parallel.

[V8KILR]

I'm not positive what that means?

[Wayne-n-Fla]

That means they will both work together,
BUT
1. you would NEVER want to inject fuel {gas} Pre-blower, a VERY dangerous thing. ie; BOOM in a big way, Water maybe, but that has its up as well as its down side .

2. You have one of the early manifolds, so only Tom can tell you if the manifold was taped and pluged for a 5th injector.

3. You probably won't have to remove the manifold, just the top plate, thats what the super charger is bolted to.

[Tom @ Fast Forward]

I have run two injectors on my 99. One in the BTB adaptor pre-blower and one in the manifold post blower. Worked great. Just found I didn't need the one pre-blower.

[V8KILR]

Why didn't you need one pre-blower? And if it was tapped, would it be underneath, or right next to the fuel rail?

[Tom @ Fast Forward]

Because the tests showed that post blower was more efficient and one had plenty of fuel.

[FormerDatsun510Man]

I did a similar test with WI on my setup prior to the R4 manifold. I found that putting all the water post blower worked at stopping ping best. I tried pre-blower, post-blower and also both. It makes sense that the best place for water injection agrees with Tom's results for fuel injection.

The only reason I think you would want to inject anything pre-blower would be to cool the blower itself down. However, I think that is only an issue if you are overspinning it, i.e. for the MP62 that would be over 16K blower rpm. I can see why RJW was using pre-blower WI because his setup spun the blower to over 21K rpm!!! For your setup you would only be going past 16K blower rpm if you ran a 140mm pulley and were going past 7500 engine rpm.

Bill

[V8KILR]

If mine was tapped post-blower, would it be underneath, or right next to the fuel rail?

[Tom @ Fast Forward]

The original ones weren't tapped post blower. Only pre-blower in the BTB adaptor.