WTFISIT

Good luck chromepuff. When you're ready, please provide comparison dyno sheets, price, and your PayPal address. ;D : ;D

I will definitely keep my eyes on this, just in case I do win that jackpot. I must admit that the idea has an immense "Wow" factor and their site does a great job of selling the concept. One downfall is that a key benefit of the SRV head seams to be it's ability to scale up to very high RPM, something that I don't know how well our tired old long stroke motor can do. Maybe with a destroke and some lighter rods and pistons, but then you're basicall redesigning the whole engine. At that point I wonder if a swap might not just be a better solution. Now, a 4g63 SRV head would certainly have a bigger market to sell to. That might make me consider a swap. ;D Good luck!

If I win the Lottery, I promise that I will fund the development of a SRV head for the quest. Short of that, I don't see how this would be possible. I don't even want to guess what the engineering/development cost for this would be. NU-Tech, were they able to give you any type of a ball-park for a 4 cylinder head? They must have some idea.

I think that Joel is mistaken, or is thinking about the E & F SDS systems. I think that with the D, you need to leave the entire stock ignition in place. You'll want both the mechanical and vacuum advance.

I cropped and scaled the image a bit to make it a better fit. http://chaostrophe.com/quest/hotrodtsi_dyno.png

Many of the wide bands these days have a simulated "old school" O2 sensor output that you can tie to your computer. The lambdaboy, which I have, jus has an output that goes high/low either side of stoich, so I suppose if the ECU is really expecting to see a varying voltage it could be a problem. I haven't used the simulated output though, so I don't really know if it's an issue.

Don't trust your narrow band O2. Â If you are really trying to make power, you will blow your engine up. Â Search these boards for wideband. Â There have been several threads recently. Â I think you can get a decent unit these days for less than $400. Â Narrowband = evil if you actually listen to it. BTW, stoich is not what you want if you are looking for power. Like other have said, you need to be aroun 12.5 or below while under boost. Anything else will bring you trouble and less power.

So, are you going to do a GP for the bushings, or include them in this GP. If so, do you know the price of the kit?

Looks like you've got a nice project in the works there. I bet that thing screams with the 19c at 19psi. Man I can't wait to get mine back in action. ;D I still can't help but think that if you have a problem with the mapping/ecu at big boost, even a rrfpr isn't going to save you. I certainly won't argue though, you are clearly more qualified than I.

Lots of people going with the Delphi injectors. They're low imp (you should stick to low imp injectors) and they're pretty inexpensive. http://www.racetronix.com/ sells them, but their site seems to be under construction today.

Basically what he said is correct. I just wanted to chime in and say that you don't really need a rising rate FPR when you have the ability to program the fuel curve. That's really more of a hack to go higher boost on a stock setup.

Well, you have almost the same setup I'll be running once I convert. Except I'm going with the 650cc injs. and a 16g (to start ) Let us know how she runs. Nice to see so many MPIs coming to life. I'm looking forward to some support if I need it. Congrats, I bet it feels good.

I think that Mike means low impedence. It's hard to find high imp. injectors over 550cc. Low impedence injectors without the resistors will (may) pull too much current through the SDS driver and blow it. I don't plan to test it, I'll take their word. I would think that it makes no difference if you wire them on the ground side (between ECU and injectors) or the hot side. I'm no EE, but something tells me the result is exactly the same. I just plan to use the instructions, which I don't have handy.

I guess that depends if the ECU you chose does more than fuel. With a fuel only computer, you'll leave the stock ignition as-is. I'm a computer age fellow, so I've opted to get rid of the entire stock ignition system, distributor and all.

I think that without the AC pulley, you may have to put in some sort of bushing to take up the space. Â I think the crank pulley bolt may be too long otherwise. Again, something I don't really know. ???